/* ==================== VARIABLES & BASE ====================*/
:root {
    --primary-color: #0F766E;
    --secondary-color: #1E40AF;
    --accent-color: #D97706;
    --light-bg: #F0F9FF;
    --dark-bg: #0F172A;
    --border-color: #E2E8F0;
    --text-primary: #1E293B;
    --text-secondary: #64748B;
    --success-color: #16A34A;
    --error-color: #DC2626;
    --spacing-unit: 1rem;
    --card-bg: #FFFFFF;
    --bg-color: #FFFFFF;
    --text-color: var(--text-primary);
    --eq-box-bg: #F0F9FF;
    --eq-box-border: #BAE6FD;
    --callout-bg: #F8FAFC;
    --callout-blue-bg: #EFF6FF;
    --callout-orange-bg: #FFFBEB;
    --callout-green-bg: #F0FDF4;
}

/* ==================== DARK MODE ====================*/
html[data-theme="dark"] {
    --primary-color: #2DD4BF;
    --secondary-color: #60A5FA;
    --accent-color: #FBBF24;
    --light-bg: #1E293B;
    --border-color: #334155;
    --text-primary: #F1F5F9;
    --text-secondary: #94A3B8;
    --success-color: #4ADE80;
    --error-color: #F87171;
    --card-bg: #1E293B;
    --bg-color: #1E293B;
    --eq-box-bg: #16324A;
    --eq-box-border: #1E4E6B;
    --callout-bg: #263241;
    --callout-blue-bg: #1E3A5F;
    --callout-orange-bg: #4A3A16;
    --callout-green-bg: #1B3A2A;
}

html[data-theme="dark"] body {
    background: #0F172A;
}

html[data-theme="dark"] .study-svg-bg       { fill: #1E293B; stroke: #64748B; }
html[data-theme="dark"] .study-svg-bar-lo   { fill: #64748B; }
html[data-theme="dark"] .study-svg-axis     { stroke: #94A3B8; }
html[data-theme="dark"] .study-svg-axis-rect { stroke: #475569; }
html[data-theme="dark"] .study-svg-dim      { stroke: #94A3B8; }
html[data-theme="dark"] .study-svg-label    { fill: #E2E8F0; }
html[data-theme="dark"] .study-svg-tick     { stroke: #94A3B8; }
html[data-theme="dark"] .study-svg-caption  { fill: #94A3B8; }
html[data-theme="dark"] .study-svg-div      { stroke: #475569; }

html[data-theme="dark"] .chat-message.assistant .message-content { background: #263241; }
html[data-theme="dark"] .chat-message.assistant p { background: #263241; }
html[data-theme="dark"] .chat-input-area { background: #1A2332; }
html[data-theme="dark"] .disclaimer,
html[data-theme="dark"] .free-tier-note { background: #453410; border-color: #78350F; }
html[data-theme="dark"] .accordion-header:hover { background: #1E3A5F; }
html[data-theme="dark"] .blog-post-body tr:nth-child(even) td { background: #1A2332; }
html[data-theme="dark"] .blog-post-body .callout-green { background: #14532D; color: #BBF7D0; }
html[data-theme="dark"] .blog-post-body .callout-peach,
html[data-theme="dark"] .blog-post-body .callout-orange { background: #4A3A16; color: #FDE68A; }
html[data-theme="dark"] .blog-post-body .callout-blue { background: #1E3A5F; color: #BFDBFE; }
html[data-theme="dark"] .blog-post-body .callout-gray { background: #263241; }
html[data-theme="dark"] .blog-draft-notice { background: #4A3A16; border-color: #78350F; color: #FDE68A; }
html[data-theme="dark"] .quiz-choice.correct { background: #14532D; }
html[data-theme="dark"] .quiz-choice.incorrect { background: #4A1414; }
html[data-theme="dark"] .quiz-feedback.correct { background: #14532D; color: #BBF7D0; }
html[data-theme="dark"] .quiz-feedback.incorrect { background: #4A1414; color: #FECACA; }
html[data-theme="dark"] .badge-published { background: #14532D; color: #BBF7D0; }
html[data-theme="dark"] .badge-draft { background: #4A3A16; color: #FDE68A; }
html[data-theme="dark"] .sprint-bot-tag { background: #263241; }

/* ==================== THEME TOGGLE ====================*/
.theme-toggle-btn {
    background: none;
    border: 2px solid var(--border-color);
    border-radius: 999px;
    width: 2.25rem;
    height: 2.25rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    cursor: pointer;
    transition: border-color 0.2s ease, transform 0.2s ease;
    line-height: 1;
}

.theme-toggle-btn:hover {
    border-color: var(--primary-color);
    transform: translateY(-1px);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Open Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text-primary);
    background: var(--card-bg);
    line-height: 1.6;
}

/* ==================== TYPOGRAPHY ====================*/
h1, h2, h3, h4, h5, h6 {
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-unit);
}

h1 { font-size: 3rem; }
h2 { font-size: 2.25rem; }
h3 { font-size: 1.875rem; }
h4 { font-size: 1.5rem; }

a {
    color: var(--secondary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--primary-color);
}

/* ==================== LAYOUT ====================*/
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-unit);
}

/* ==================== HEADER & NAVIGATION ====================*/
.header {
    background: var(--card-bg);
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar {
    padding: 1rem 0;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-unit);
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    white-space: nowrap;
    flex-shrink: 0;
}

.logo a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: inherit;
    text-decoration: none;
    white-space: nowrap;
}

.logo-img {
    height: 40px;
    width: auto;
}

/* Two logo-icon SVGs are always in the DOM (light + reversed-dark variant);
   only one shows at a time, matched to the light/dark theme toggle. */
.logo-img-dark {
    display: none;
}

[data-theme="dark"] .logo-img-light {
    display: none;
}

[data-theme="dark"] .logo-img-dark {
    display: block;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 1.1rem;
    align-items: center;
}

.nav-menu a {
    color: var(--text-primary);
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary-color);
}

#authNav .btn-primary {
    padding: 0.5rem 1.5rem;
    border-radius: 0.375rem;
}

.user-menu {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.user-menu-profile {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    padding: 0.25rem 0.5rem;
    border-radius: 0.375rem;
    transition: background 0.2s ease;
}

.user-menu-profile:hover {
    background: var(--light-bg);
}

.user-avatar {
    font-size: 1.3rem;
    line-height: 1;
}

.profile-avatar-grid {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.profile-avatar-choice {
    font-size: 1.5rem;
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 0.4rem;
    cursor: pointer;
    transition: all 0.2s ease;
    line-height: 1;
}

.profile-avatar-choice:hover {
    border-color: var(--primary-color);
}

.profile-avatar-choice.selected {
    border-color: var(--primary-color);
    background: rgba(15, 118, 110, 0.1);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    margin: 5px 0;
    transition: all 0.3s ease;
}

/* ==================== HERO SECTION ====================*/
.hero {
    background: radial-gradient(120% 140% at 78% 20%, #131a1d 0%, #0b0e11 60%);
    padding: 5rem var(--spacing-unit);
    position: relative;
    overflow: hidden;
    min-height: 600px;
    display: flex;
    align-items: center;
}

.hero-art {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    opacity: 0.9;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 640px;
}

.hero-eyebrow {
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: #5eead4;
    margin-bottom: 1.1rem;
}

.hero h1 {
    font-size: clamp(2.4rem, 5vw, 3.6rem);
    font-weight: 800;
    line-height: 1.05;
    letter-spacing: -0.01em;
    margin-bottom: 1.2rem;
    color: #f6efe2;
    text-wrap: balance;
}

.hero h1 .accent {
    color: #2dd4c0;
}

.hero p {
    font-size: 1.1rem;
    line-height: 1.6;
    color: rgba(246, 239, 226, 0.8);
    margin-bottom: 2rem;
    max-width: 46ch;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* ==================== TRUST STRIP ====================*/
.trust-strip {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
}

.trust-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    padding: 1.7rem var(--spacing-unit);
}

.trust-item {
    display: flex;
    align-items: center;
    gap: 0.85rem;
}

.trust-item svg {
    width: 26px;
    height: 26px;
    color: var(--primary-color);
    flex: none;
}

.trust-item .trust-title {
    font-size: 0.82rem;
    font-weight: 700;
    line-height: 1.25;
    color: var(--text-primary);
}

.trust-item .trust-sub {
    font-size: 0.78rem;
    color: var(--text-secondary);
    line-height: 1.25;
}

@media (max-width: 900px) {
    .trust-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
    .trust-grid { grid-template-columns: 1fr; }
}

/* ==================== HOMEPAGE NEWS TICKER ====================*/
.news-ticker {
    background: #0b0e11;
    border-bottom: 1px solid rgba(246,239,226,0.08);
    display: flex;
    align-items: center;
    overflow: hidden;
    padding: 0.55rem 0;
}

.news-ticker-label {
    flex: none;
    display: flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0 1.1rem;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: #2dd4c0;
    border-right: 1px solid rgba(246,239,226,0.12);
    white-space: nowrap;
}

.news-ticker-track-wrap {
    flex: 1;
    overflow: hidden;
    mask-image: linear-gradient(90deg, transparent, #000 3%, #000 97%, transparent);
    -webkit-mask-image: linear-gradient(90deg, transparent, #000 3%, #000 97%, transparent);
}

.news-ticker-track {
    display: flex;
    align-items: center;
    white-space: nowrap;
    width: max-content;
    animation: news-ticker-scroll 45s linear infinite;
}

.news-ticker-track:hover {
    animation-play-state: paused;
}

.news-ticker-item {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0 1.5rem;
    font-size: 0.85rem;
    color: rgba(246,239,226,0.9);
    text-decoration: none;
}

.news-ticker-item:hover {
    color: #2dd4c0;
}

.news-ticker-item .news-ticker-field {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: #2dd4c0;
    opacity: 0.85;
}

.news-ticker-sep {
    color: rgba(246,239,226,0.25);
}

@media (prefers-reduced-motion: reduce) {
    .news-ticker-track {
        animation: none;
        overflow-x: auto;
    }
}

@keyframes news-ticker-scroll {
    from { transform: translateX(0); }
    to { transform: translateX(-50%); }
}

/* ==================== BUTTONS ====================*/
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    text-decoration: none;
    text-align: center;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: #065F46;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(15, 118, 110, 0.3);
}

.btn-secondary {
    background: var(--card-bg);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--light-bg);
    transform: translateY(-2px);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ==================== SERVICES SECTION ====================*/
.services {
    padding: 4rem var(--spacing-unit);
}

.services h2 {
    text-align: center;
    margin-bottom: 3rem;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 2rem;
    transition: all 0.3s ease;
}

.service-card:hover {
    border-color: var(--primary-color);
    box-shadow: 0 10px 25px rgba(15, 118, 110, 0.1);
    transform: translateY(-5px);
}

.service-icon {
    width: 44px;
    height: 44px;
    border-radius: 9px;
    background: rgba(15, 118, 110, 0.12);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    margin-bottom: 1rem;
}

.service-card h3 {
    margin-bottom: 0.5rem;
}

/* ==================== CHATBOT FEATURE SECTION ====================*/
.chatbot-feature {
    background: var(--light-bg);
    padding: 4rem var(--spacing-unit);
}

.chatbot-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.chatbot-text h2 {
    margin-bottom: 1.5rem;
}

.chatbot-features {
    list-style: none;
    margin-bottom: 2rem;
}

.chatbot-features li {
    padding: 0.75rem 0;
    padding-left: 2rem;
    position: relative;
}

.chatbot-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 700;
}

.chat-box {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1.5rem;
    height: 300px;
    overflow-y: auto;
}

.chat-message {
    margin-bottom: 1rem;
    display: flex;
    gap: 0.75rem;
}

.chat-message.assistant p {
    background: #F1F5F9;
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    max-width: 85%;
}

.chat-message.user p {
    background: var(--primary-color);
    color: white;
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    margin-left: auto;
    max-width: 85%;
}

/* ==================== ABOUT SECTION ====================*/
.about {
    padding: 4rem var(--spacing-unit);
}

.about h2 {
    text-align: center;
    margin-bottom: 3rem;
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
}

.credentials {
    list-style: none;
    margin-top: 1rem;
}

.credentials li {
    padding: 0.5rem 0;
    padding-left: 2rem;
    position: relative;
}

.credentials li::before {
    content: '•';
    position: absolute;
    left: 0.5rem;
    color: var(--primary-color);
    font-weight: 700;
}

.stat-box {
    background: var(--light-bg);
    border-left: 4px solid var(--primary-color);
    padding: 1.5rem;
    margin-bottom: 1rem;
    border-radius: 0.5rem;
    text-align: center;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ==================== APPS SECTION ====================*/
.apps {
    padding: 4rem var(--spacing-unit);
    background: var(--light-bg);
}

.apps h2 {
    text-align: center;
    margin-bottom: 3rem;
}

.apps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.app-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s ease;
}

.app-card:hover {
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
    transform: translateY(-5px);
}

.app-card h3 {
    margin-bottom: 0.5rem;
}

.app-card .price {
    font-size: 1.25rem;
    color: var(--primary-color);
    font-weight: 700;
    margin-bottom: 1rem;
}

/* ==================== MEMBER DASHBOARD ====================*/
.dashboard-section-heading h2 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.dashboard-quicklinks {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
}

@media (max-width: 640px) {
    .dashboard-quicklinks {
        grid-template-columns: 1fr;
    }
}

.dashboard-card {
    display: flex;
    align-items: flex-start;
    gap: 1.1rem;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1.5rem;
    text-decoration: none;
    color: inherit;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.dashboard-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 28px rgba(0,0,0,0.1);
    border-color: var(--primary-color);
}

.dashboard-card-icon {
    flex-shrink: 0;
    width: 46px;
    height: 46px;
    border-radius: 0.65rem;
    background: rgba(15, 118, 110, 0.1);
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
}

.dashboard-card-icon svg {
    width: 24px;
    height: 24px;
}

.dashboard-card-body h3 {
    margin: 0 0 0.35rem;
    font-size: 1.05rem;
    color: var(--text-primary);
}

.dashboard-card-body p {
    margin: 0 0 0.75rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
}

.dashboard-card-cta {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--primary-color);
}

.briefing-wrap {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1.75rem 2rem;
}

.briefing-updated {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin: 0 0 1.5rem;
    padding-bottom: 1.25rem;
    border-bottom: 1px solid var(--border-color);
}

.briefing-field {
    margin-bottom: 2rem;
}

.briefing-field:last-child {
    margin-bottom: 0;
}

.briefing-field h3 {
    font-size: 1.05rem;
    margin: 0 0 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--primary-color);
    display: inline-block;
}

.briefing-category-label {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin: 1.25rem 0 0.5rem;
}

.briefing-category-label:first-of-type {
    margin-top: 0.25rem;
}

.briefing-item {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
}

.briefing-item:last-child {
    border-bottom: none;
}

.briefing-item a {
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
}

.briefing-item a:hover {
    color: var(--primary-color);
}

.briefing-source {
    color: var(--text-secondary);
    font-size: 0.83rem;
    margin-top: 0.15rem;
}

.briefing-item p {
    margin: 0.4rem 0 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
}

.briefing-empty {
    text-align: center;
    color: var(--text-secondary);
    padding: 1.5rem 1rem;
}

/* ==================== CONTACT SECTION ====================*/
.contact {
    padding: 4rem var(--spacing-unit);
}

.contact h2 {
    text-align: center;
    margin-bottom: 3rem;
}

.contact-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
}

.contact-form {
    background: var(--light-bg);
    padding: 2rem;
    border-radius: 0.75rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    font-family: inherit;
    font-size: 1rem;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.1);
}

.contact-info h3 {
    margin-bottom: 1.5rem;
}

.contact-info p {
    margin-bottom: 1rem;
    line-height: 1.8;
}

/* ==================== FOOTER ====================*/
.footer {
    background: var(--dark-bg);
    color: white;
    padding: 3rem var(--spacing-unit) 1rem;
    margin-top: 4rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    margin-bottom: 1rem;
    color: white;
}

.footer-section ul {
    list-style: none;
}

.footer-section a {
    color: #AEC8D6;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 2rem;
    text-align: center;
    color: #AEC8D6;
}

/* ==================== CHATBOT PAGE ====================*/
.page-header {
    background: radial-gradient(140% 180% at 85% 0%, #131a1d 0%, #0b0e11 65%);
    color: #f6efe2;
    padding: 3.5rem var(--spacing-unit);
    text-align: left;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(246, 239, 226, 0.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(246, 239, 226, 0.035) 1px, transparent 1px);
    background-size: 46px 46px;
    pointer-events: none;
}

.page-header .container {
    position: relative;
    z-index: 1;
}

.page-header h1 {
    color: #f6efe2;
    font-weight: 800;
    letter-spacing: -0.01em;
}

.page-eyebrow {
    text-transform: uppercase;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.14em;
    color: #2dd4c0;
    margin: 0 0 0.6rem;
}

.page-header p {
    font-size: 1.1rem;
    margin-top: 0.5rem;
    color: rgba(246, 239, 226, 0.8);
}

.breadcrumb-back {
    display: inline-block;
    color: rgba(255, 255, 255, 0.85);
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
}

.breadcrumb-back:hover {
    color: white;
}

.chatbot-main {
    padding: 2rem var(--spacing-unit);
}

.chatbot-wrapper {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 2rem;
    margin-bottom: 3rem;
}

.chatbot-sidebar {
    background: var(--light-bg);
    padding: 1.5rem;
    border-radius: 0.75rem;
    border: 1px solid var(--border-color);
    height: fit-content;
}

.chatbot-sidebar h3 {
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.chatbot-sidebar h4 {
    margin-bottom: 0.75rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.mode-selector {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.mode-option {
    display: flex;
    align-items: flex-start;
    gap: 0.6rem;
    cursor: pointer;
    padding: 0.75rem 1rem;
    background: var(--card-bg);
    border-radius: 0.5rem;
    border: 2px solid var(--border-color);
    transition: border-color 0.2s ease, background 0.2s ease;
}

.mode-option:has(input:checked) {
    border-color: var(--primary-color);
    background: rgba(15, 118, 110, 0.05);
}

.mode-option input[type="radio"] {
    margin-top: 0.2rem;
    flex-shrink: 0;
}

.mode-option-content strong {
    display: block;
    color: var(--primary-color);
    font-size: 0.95rem;
}

.mode-option-content p {
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin: 0.15rem 0 0;
}

.instruction-item {
    background: var(--card-bg);
    padding: 1rem;
    margin-bottom: 1rem;
    border-radius: 0.5rem;
    border-left: 3px solid var(--primary-color);
}

.instruction-item strong {
    color: var(--primary-color);
}

.instruction-item p {
    font-size: 0.9rem;
    margin-top: 0.5rem;
    color: var(--text-secondary);
}

.personality-selector {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.personality-selector label {
    display: flex;
    flex-direction: column;
    cursor: pointer;
    padding: 1rem;
    background: var(--card-bg);
    border-radius: 0.5rem;
    border: 2px solid var(--border-color);
    transition: all 0.3s ease;
}

.personality-selector label:has(input:checked) {
    border-color: var(--primary-color);
    background: rgba(15, 118, 110, 0.05);
}

.personality-selector input {
    margin-bottom: 0.5rem;
}

.personality-selector strong {
    color: var(--primary-color);
}

.personality-selector p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin: 0;
}

.chatbot-interface {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    display: flex;
    flex-direction: column;
    height: 800px;
}

.disclaimer {
    background: #FEF3C7;
    border-bottom: 1px solid #FBBF24;
    padding: 1rem;
    border-radius: 0.75rem 0.75rem 0 0;
    font-size: 0.9rem;
}

.chat-container {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
}

.chat-message {
    margin-bottom: 1rem;
    display: flex;
    gap: 0.75rem;
}

.message-content {
    flex: 1;
}

.message-content p {
    margin: 0.5rem 0;
}

.message-content ul {
    margin-left: 1.5rem;
    margin-top: 0.5rem;
}

.chat-message.assistant .message-content {
    background: #F1F5F9;
    padding: 1rem;
    border-radius: 0.5rem;
}

.chat-message.user {
    justify-content: flex-end;
}

.chat-message.user .message-content {
    background: var(--primary-color);
    color: white;
    padding: 1rem;
    border-radius: 0.5rem;
    max-width: 85%;
}

.timestamp {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

.chat-input-area {
    border-top: 1px solid var(--border-color);
    padding: 1.5rem;
    background: #FAFBFC;
    border-radius: 0 0 0.75rem 0.75rem;
}

.input-wrapper {
    display: flex;
    gap: 1rem;
}

.input-wrapper textarea {
    flex: 1;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    padding: 0.75rem;
    font-family: inherit;
    resize: none;
}

.input-wrapper textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.1);
}

.btn-send {
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 0.375rem;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
}

.btn-send:hover {
    background: #065F46;
}

.char-count {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

.auth-prompt {
    color: var(--error-color);
    margin-top: 0.5rem;
}

.quick-actions {
    display: flex;
    gap: 0.75rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

.quick-btn {
    background: var(--light-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: 0.375rem;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.quick-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.chatbot-help {
    margin-top: 3rem;
    padding: 2rem;
    background: var(--light-bg);
    border-radius: 0.75rem;
}

.chatbot-help h3 {
    margin-bottom: 1.5rem;
}

.help-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.help-card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 0.5rem;
    border-left: 4px solid var(--primary-color);
}

/* ==================== PRICING SECTION ====================*/
.pricing {
    padding: 4rem var(--spacing-unit);
    background: var(--light-bg);
}

.pricing h2 {
    text-align: center;
    margin-bottom: 3rem;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.pricing-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 2rem;
    position: relative;
    transition: all 0.3s ease;
}

.pricing-card.featured {
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px rgba(15, 118, 110, 0.2);
    transform: scale(1.05);
}

.pricing-card .badge {
    position: absolute;
    top: -12px;
    right: 20px;
    background: var(--accent-color);
    color: white;
    padding: 0.25rem 1rem;
    border-radius: 2rem;
    font-size: 0.85rem;
    font-weight: 600;
}

.pricing-card h3 {
    margin-bottom: 1rem;
}

.price {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.price span {
    font-size: 1rem;
    color: var(--text-secondary);
}

.pricing-card ul {
    list-style: none;
    margin-bottom: 2rem;
}

.pricing-card ul li {
    padding: 0.5rem 0;
}

/* ==================== MODAL ====================*/
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    background: var(--card-bg);
    margin: 5% auto;
    padding: 2rem;
    border-radius: 0.75rem;
    width: 90%;
    max-width: 500px;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.close {
    color: var(--text-secondary);
    float: right;
    font-size: 2rem;
    font-weight: 300;
    cursor: pointer;
    transition: color 0.3s ease;
}

.close:hover {
    color: var(--text-primary);
}

.auth-tabs {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
}

.tab-btn {
    background: none;
    border: none;
    padding: 1rem;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.3s ease;
}

.tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.auth-form {
    display: none;
}

.auth-form.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

.error-message {
    color: var(--error-color);
    margin-top: 1rem;
    font-size: 0.9rem;
}

/* ==================== RESPONSIVE ====================*/
/* The full 10-link desktop nav plus the longer "Affinity Medical Physics"
   logo no longer fits between 769-1100px -- fall back to the hamburger
   menu here too instead of cramming/overflowing. Mirrors the nav-menu
   treatment in the 768px breakpoint below without touching its other
   (unrelated) rules. */
@media (min-width: 769px) and (max-width: 1100px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--card-bg);
        flex-direction: column;
        gap: 1rem;
        padding: 2rem;
        box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    }

    .nav-menu.active {
        display: flex;
    }
}

@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    
    .hamburger {
        display: flex;
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--card-bg);
        flex-direction: column;
        gap: 1rem;
        padding: 2rem;
        box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    }

    .nav-menu.active {
        display: flex;
    }

    .hero {
        padding: 3rem var(--spacing-unit);
        min-height: auto;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .chatbot-content {
        grid-template-columns: 1fr;
    }

    .about-content {
        grid-template-columns: 1fr;
    }

    .contact-content {
        grid-template-columns: 1fr;
    }

    .chatbot-wrapper {
        grid-template-columns: 1fr;
    }

    .chatbot-sidebar {
        height: auto;
    }

    .chatbot-interface {
        height: auto;
        min-height: 600px;
    }

    .pricing-card.featured {
        transform: scale(1);
    }

    .modal-content {
        width: 90%;
        margin: 10% auto;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 0.75rem;
    }

    h1 { font-size: 1.5rem; }
    h2 { font-size: 1.25rem; }

    .hero-buttons {
        flex-direction: column;
    }

    .input-wrapper {
        flex-direction: column;
    }

    .quick-actions {
        flex-direction: column;
    }

    .quick-btn {
        width: 100%;
    }
}

/* ==================== ABR STUDY CENTER ====================*/

.study-wrapper {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 2rem;
}

.study-sidebar {
    background: var(--light-bg);
    padding: 1.5rem;
    border-radius: 0.75rem;
    border: 1px solid var(--border-color);
    height: fit-content;
    position: sticky;
    top: 90px;
}

.study-sidebar h3 {
    margin-bottom: 1rem;
    font-size: 1.15rem;
}

.modality-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.modality-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--card-bg);
    padding: 0.75rem;
    border-radius: 0.5rem;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.2s ease;
}

.modality-item:hover {
    border-color: var(--primary-color);
}

.modality-item.active {
    border-color: var(--primary-color);
    background: rgba(15, 118, 110, 0.06);
}

.modality-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.modality-name {
    font-weight: 600;
    font-size: 0.95rem;
}

.modality-meta {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.study-panel {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 2rem;
    min-height: 500px;
}

.study-welcome h2 {
    margin-bottom: 1rem;
}

.free-tier-note {
    background: #FEF3C7;
    border: 1px solid #FBBF24;
    border-radius: 0.5rem;
    padding: 1rem;
    margin-top: 1.5rem;
    font-size: 0.95rem;
}

.free-tier-note a {
    font-weight: 600;
}

.study-panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}

.study-panel-header h2 {
    margin: 0;
}

.study-mode-toggle {
    display: flex;
    gap: 0.5rem;
}

.mode-btn {
    background: var(--light-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 0.6rem 1.2rem;
    border-radius: 0.375rem;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.2s ease;
}

.mode-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* Accordion (Study Notes) */
.accordion-item {
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    margin-bottom: 0.75rem;
    overflow: hidden;
}

.accordion-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.25rem;
    background: var(--light-bg);
    cursor: pointer;
    font-weight: 600;
    transition: background 0.2s ease;
}

.accordion-header:hover {
    background: #E0F2FE;
}

.accordion-header.locked {
    cursor: default;
    color: var(--text-secondary);
}

.accordion-toggle {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

.word-count {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.accordion-body {
    padding: 1.5rem;
    line-height: 1.75;
}

.accordion-body h2 {
    font-size: 1.4rem;
    margin-top: 1.5rem;
}

.accordion-body h3 {
    font-size: 1.15rem;
    margin-top: 1.25rem;
    color: var(--primary-color);
}

.accordion-body ul {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

.accordion-body li {
    margin-bottom: 0.4rem;
}

.accordion-body hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 1.5rem 0;
}

.accordion-locked-notice {
    padding: 1rem 1.25rem;
    background: var(--callout-orange-bg);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.upgrade-banner {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 1.5rem;
    border-radius: 0.75rem;
    text-align: center;
    margin-top: 1.5rem;
}

.upgrade-banner p {
    margin-bottom: 1rem;
}

.upgrade-banner .btn-primary {
    background: var(--card-bg);
    color: var(--primary-color);
}

.upgrade-banner .btn-primary:hover {
    background: var(--light-bg);
}

/* Practice Quiz */
.quiz-week-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-style: italic;
    margin-bottom: 0.5rem;
}

.quiz-progress {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-weight: 600;
}

.quiz-question {
    background: var(--light-bg);
    padding: 1.5rem;
    border-radius: 0.5rem;
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    font-weight: 500;
}

.quiz-choices {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.quiz-choice {
    text-align: left;
    background: var(--card-bg);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    padding: 1rem 1.25rem;
    border-radius: 0.5rem;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.2s ease;
}

.quiz-choice:hover:not(:disabled) {
    border-color: var(--primary-color);
    background: rgba(15, 118, 110, 0.04);
}

.quiz-choice:disabled {
    cursor: default;
}

.quiz-choice.correct {
    border-color: var(--success-color);
    background: #DCFCE7;
    font-weight: 600;
}

.quiz-choice.incorrect {
    border-color: var(--error-color);
    background: #FEE2E2;
}

.quiz-feedback {
    padding: 1rem;
    border-radius: 0.5rem;
    margin-bottom: 1.5rem;
    font-weight: 600;
}

.quiz-feedback.correct {
    background: #DCFCE7;
    color: #166534;
}

.quiz-feedback.incorrect {
    background: #FEE2E2;
    color: #991B1B;
}

.quiz-complete {
    text-align: center;
    padding: 2rem;
}

.quiz-complete h3 {
    margin-bottom: 1rem;
}

.loading-text {
    color: var(--text-secondary);
    text-align: center;
    padding: 2rem;
}

@media (max-width: 768px) {
    .study-wrapper {
        grid-template-columns: 1fr;
    }

    .study-sidebar {
        position: static;
    }

    .study-panel-header {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* ==================== BLOG INDEX ====================*/

.blog-index-section {
    padding: 3rem 0 5rem;
}

.blog-empty {
    color: var(--text-secondary);
    text-align: center;
    padding: 3rem;
    font-size: 1.1rem;
}

.blog-card {
    display: flex;
    gap: 2rem;
    text-decoration: none;
    color: inherit;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    overflow: hidden;
    margin-bottom: 2rem;
    transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.blog-card:hover {
    box-shadow: 0 8px 24px rgba(0,0,0,0.10);
    transform: translateY(-2px);
}

.blog-card-img {
    width: 280px;
    min-height: 180px;
    flex-shrink: 0;
    background-size: cover;
    background-position: center;
}

.blog-card-img--placeholder {
    background: linear-gradient(135deg, var(--light-bg) 0%, #dbeafe 100%);
}

.blog-card-body {
    padding: 1.5rem 1.5rem 1.5rem 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    flex: 1;
}

.blog-card-meta {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.blog-card-date {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.blog-draft-badge {
    background: var(--accent-color);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.2rem 0.5rem;
    border-radius: 0.25rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.blog-card-title {
    font-size: 1.4rem;
    margin-bottom: 0.4rem;
    color: var(--text-primary);
    line-height: 1.3;
}

.blog-card-subtitle {
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.blog-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-bottom: 1rem;
}

.blog-tag {
    background: var(--light-bg);
    color: var(--primary-color);
    font-size: 0.78rem;
    font-weight: 600;
    padding: 0.2rem 0.6rem;
    border-radius: 999px;
    letter-spacing: 0.02em;
}

.blog-card-author {
    display: flex;
    flex-direction: column;
    gap: 0.1rem;
    margin-top: auto;
}

.blog-card-author-name {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.blog-card-author-title {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

@media (max-width: 640px) {
    .blog-card {
        flex-direction: column;
    }
    .blog-card-img {
        width: 100%;
        min-height: 200px;
    }
    .blog-card-body {
        padding: 1.25rem;
    }
}

/* ==================== BLOG POST PAGE ====================*/

.blog-post-hero {
    width: 100%;
    height: 420px;
    background: var(--dark-bg);
    background-size: cover;
    background-position: center;
    position: relative;
}

.blog-post-hero--has-image {
    height: 520px;
}

.blog-post-hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.72) 0%, rgba(0,0,0,0.15) 60%, transparent 100%);
    display: flex;
    align-items: flex-end;
    padding: 3rem;
}

.blog-post-hero-title {
    font-family: 'Poppins', sans-serif;
    font-size: 2.5rem;
    font-weight: 700;
    color: #fff;
    max-width: 900px;
    line-height: 1.2;
    text-shadow: 0 2px 8px rgba(0,0,0,0.4);
}

.blog-post-main {
    max-width: 780px;
    margin: 0 auto;
    padding: 0 1rem 4rem;
}

.blog-post-loading {
    padding: 4rem 0;
    text-align: center;
}

.blog-post-article {
    padding-top: 2.5rem;
}

.blog-post-header {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.blog-post-title {
    font-size: 2.25rem;
    line-height: 1.2;
    margin-bottom: 0.6rem;
    color: var(--text-primary);
}

.blog-post-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
    line-height: 1.5;
}

.blog-post-meta-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
    flex-wrap: wrap;
}

.blog-post-author-block {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.blog-post-author-name {
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--text-primary);
}

.blog-post-author-title {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.blog-post-date-tags {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.4rem;
}

.blog-post-date {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.blog-post-tags-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    justify-content: flex-end;
}

/* ==================== BLOG POST BODY CONTENT ====================*/

.blog-post-body {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text-primary);
}

.blog-post-body h2 {
    font-size: 1.75rem;
    color: var(--text-secondary);
    font-weight: 700;
    margin: 2.5rem 0 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border-color);
    letter-spacing: -0.01em;
}

.blog-post-body h3 {
    font-size: 1.35rem;
    color: var(--text-primary);
    margin: 2rem 0 0.75rem;
}

.blog-post-body h4 {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin: 1.5rem 0 0.5rem;
}

.blog-post-body p {
    margin-bottom: 1.25rem;
}

.blog-post-body ul, .blog-post-body ol {
    margin: 0 0 1.25rem 1.5rem;
}

.blog-post-body li {
    margin-bottom: 0.4rem;
}

.blog-post-body a {
    color: var(--secondary-color);
    text-decoration: underline;
}

.blog-post-body img {
    max-width: 100%;
    border-radius: 0.5rem;
    margin: 1.5rem 0;
}

.blog-post-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    font-size: 0.95rem;
    overflow-x: auto;
    display: block;
}

.blog-post-body th {
    background: var(--light-bg);
    font-weight: 600;
    padding: 0.65rem 0.85rem;
    text-align: left;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.blog-post-body td {
    padding: 0.65rem 0.85rem;
    border: 1px solid var(--border-color);
    vertical-align: top;
}

.blog-post-body tr:nth-child(even) td {
    background: #FAFAFA;
}

.blog-post-body blockquote {
    border-left: 4px solid var(--primary-color);
    background: rgba(15, 118, 110, 0.05);
    margin: 1.5rem 0;
    padding: 1rem 1.5rem;
    border-radius: 0 0.5rem 0.5rem 0;
    font-style: italic;
    font-size: 1.05rem;
    color: var(--text-primary);
}

/* Callout boxes */
.blog-post-body .callout {
    border-radius: 0.6rem;
    padding: 1.25rem 1.5rem;
    margin: 1.75rem 0;
    position: relative;
}

.blog-post-body .callout-green {
    background: #DCFCE7;
    border-left: 5px solid #16A34A;
    color: #14532D;
}

.blog-post-body .callout-green strong:first-child::before {
    content: "✅ ";
}

.blog-post-body .callout-peach,
.blog-post-body .callout-orange {
    background: #FEF3C7;
    border-left: 5px solid var(--accent-color);
    color: #78350F;
}

.blog-post-body .callout-peach strong:first-child::before,
.blog-post-body .callout-orange strong:first-child::before {
    content: "📌 ";
}

.blog-post-body .callout-blue {
    background: #EFF6FF;
    border-left: 5px solid var(--secondary-color);
    color: #1E3A8A;
}

.blog-post-body .callout-gray {
    background: #F8FAFC;
    border-left: 5px solid #94A3B8;
    color: var(--text-primary);
}

.blog-post-body .callout-title {
    font-weight: 700;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 0.5rem;
    display: block;
}

/* References section */
.blog-post-body .references {
    margin-top: 3rem;
    padding-top: 1.5rem;
    border-top: 2px solid var(--border-color);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.blog-post-body .references h2 {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.blog-post-body .references ol {
    margin-left: 1.25rem;
}

.blog-post-body .references li {
    margin-bottom: 0.5rem;
    line-height: 1.5;
}

/* Draft notice */
.blog-draft-notice {
    background: #FEF9C3;
    border: 1px solid #FCD34D;
    border-radius: 0.5rem;
    padding: 0.75rem 1rem;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
    color: #92400E;
}

/* Social share */
.blog-post-share {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-top: 2.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.blog-post-share-label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.blog-share-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: 1px solid var(--border-color);
    background: var(--card-bg);
    border-radius: 50%;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

.blog-share-btn:hover {
    background: var(--light-bg);
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.blog-copy-feedback {
    font-size: 0.85rem;
    color: var(--success-color);
    font-weight: 600;
}

/* ==================== BLOG COMMENTS ====================*/

.blog-comments-section {
    background: var(--light-bg);
    padding: 3rem 1rem 4rem;
    margin-top: 1rem;
}

.blog-comments-heading {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.blog-comments-list {
    margin-bottom: 2.5rem;
}

.blog-no-comments {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.blog-comment {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 0.6rem;
    padding: 1.25rem;
    margin-bottom: 1rem;
}

.blog-comment-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 1rem;
    margin-bottom: 0.6rem;
}

.blog-comment-author {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-primary);
}

.blog-comment-date {
    font-size: 0.82rem;
    color: var(--text-secondary);
}

.blog-comment-body {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-primary);
    white-space: pre-line;
}

.blog-comment-form-wrap {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1.75rem;
}

.blog-comment-form-title {
    font-size: 1.15rem;
    margin-bottom: 0.25rem;
}

.blog-comment-note {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1.25rem;
}

.blog-comment-fields {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 0;
}

.blog-email-note {
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 400;
}

.required {
    color: var(--error-color);
}

.blog-comment-status {
    margin-top: 0.75rem;
    font-size: 0.9rem;
    font-weight: 500;
}

.blog-comment-status.success {
    color: var(--success-color);
}

.blog-comment-status.error {
    color: var(--error-color);
}

@media (max-width: 640px) {
    .blog-comment-fields {
        grid-template-columns: 1fr;
    }
    .blog-post-hero {
        height: 280px;
    }
    .blog-post-hero--has-image {
        height: 320px;
    }
    .blog-post-hero-title {
        font-size: 1.6rem;
    }
    .blog-post-title {
        font-size: 1.6rem;
    }
    .blog-post-meta-row {
        flex-direction: column;
    }
    .blog-post-date-tags {
        align-items: flex-start;
    }
    .blog-post-tags-row {
        justify-content: flex-start;
    }
}

/* ==================== BLOG ADMIN ====================*/

.admin-blog-editor {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.admin-blog-editor h3 {
    margin-bottom: 1.25rem;
    font-size: 1.2rem;
}

.admin-blog-field-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.ql-editor {
    min-height: 360px;
    font-size: 1rem;
    font-family: 'Open Sans', sans-serif;
}

.ql-container {
    font-size: 1rem;
}

.admin-comment-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 0.6rem;
    padding: 1rem 1.25rem;
    margin-bottom: 0.75rem;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
}

.admin-comment-meta {
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin-bottom: 0.4rem;
}

.admin-comment-body-text {
    font-size: 0.95rem;
    line-height: 1.5;
    color: var(--text-primary);
}

.admin-comment-actions {
    display: flex;
    gap: 0.5rem;
    flex-shrink: 0;
}

.admin-blog-tabs {
    display: flex;
    gap: 0;
    margin-bottom: 1.5rem;
    border-bottom: 2px solid var(--border-color);
}

.admin-blog-tab {
    background: none;
    border: none;
    padding: 0.75rem 1.25rem;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: color 0.2s, border-color 0.2s;
}

.admin-blog-tab.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.admin-posts-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

.admin-posts-table th, .admin-posts-table td {
    padding: 0.65rem 0.85rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.admin-posts-table th {
    background: var(--light-bg);
    font-weight: 600;
}

.admin-posts-table tr:last-child td {
    border-bottom: none;
}

.badge-published {
    background: #DCFCE7;
    color: #166534;
    padding: 0.15rem 0.5rem;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 600;
}

.badge-draft {
    background: #FEF9C3;
    color: #92400E;
    padding: 0.15rem 0.5rem;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 600;
}

/* ==================== STUDY QUESTION BANK ADMIN ==================== */
.sq-preview-card {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 0.75rem;
    background: var(--surface-color);
    transition: border-color 0.15s;
}
.sq-preview-card:has(input:checked) {
    border-color: var(--primary-color);
    background: color-mix(in srgb, var(--primary-color) 5%, var(--surface-color));
}
.sq-bank-list { display: flex; flex-direction: column; gap: 0.6rem; }
.sq-bank-card {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.85rem 1rem;
    background: var(--surface-color);
}
.sq-inactive {
    opacity: 0.5;
    border-style: dashed;
}

.sq-choice-row {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: 0.5rem;
}
.sq-choice-label {
    font-weight: 600;
    width: 1.5rem;
    flex-shrink: 0;
}
.sq-choice-input {
    flex: 1;
    padding: 0.4rem 0.65rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--bg-color);
    color: var(--text-color);
    font-size: 0.95rem;
}
.sq-choice-row:has(input[type="radio"]:checked) .sq-choice-input {
    border-color: var(--primary-color);
    background: color-mix(in srgb, var(--primary-color) 6%, var(--bg-color));
}

/* ==================== STUDY GRAPHICAL ELEMENTS ==================== */

.study-eq-box {
    background: var(--eq-box-bg);
    border: 1px solid var(--eq-box-border);
    border-radius: 8px;
    padding: 1rem 1.25rem;
    margin: 1rem 0;
    overflow-x: auto;
    text-align: center;
    font-size: 1.05rem;
}

.study-callout {
    border-left: 4px solid var(--text-secondary);
    background: var(--callout-bg);
    border-radius: 0 6px 6px 0;
    padding: 0.75rem 1rem;
    margin: 1rem 0;
    font-size: 0.93rem;
}
.study-callout-blue {
    border-left: 4px solid #2563EB;
    background: var(--callout-blue-bg);
    border-radius: 0 6px 6px 0;
    padding: 0.75rem 1rem;
    margin: 1rem 0;
    font-size: 0.93rem;
}
.study-callout-orange {
    border-left: 4px solid #D97706;
    background: var(--callout-orange-bg);
    border-radius: 0 6px 6px 0;
    padding: 0.75rem 1rem;
    margin: 1rem 0;
    font-size: 0.93rem;
}
.study-callout-green {
    border-left: 4px solid #16A34A;
    background: var(--callout-green-bg);
    border-radius: 0 6px 6px 0;
    padding: 0.75rem 1rem;
    margin: 1rem 0;
    font-size: 0.93rem;
}

.study-svg {
    display: block;
    width: 100%;
    height: auto;
    max-width: 540px;
    margin: 1rem auto;
    border-radius: 8px;
    overflow: hidden;
}

/* SVG element classes for theme-aware diagrams */
.study-svg-bg       { fill: #F1F5F9; stroke: #94A3B8; stroke-width: 1; }
.study-svg-bar-hi   { fill: #0F766E; }
.study-svg-bar-lo   { fill: #94A3B8; }
.study-svg-bar-ref  { fill: #D97706; }
.study-svg-curve-1  { fill: none; stroke: #0F766E; stroke-width: 2.5; }
.study-svg-curve-2  { fill: none; stroke: #2563EB; stroke-width: 2.5; }
.study-svg-curve-3  { fill: none; stroke: #D97706; stroke-width: 2; stroke-dasharray: 5 3; }
.study-svg-axis     { stroke: #475569; stroke-width: 1.5; fill: none; }
.study-svg-axis-rect { fill: none; stroke: #CBD5E1; stroke-width: 1; }
.study-svg-ray      { stroke: #F59E0B; stroke-width: 1.5; stroke-dasharray: 4 3; fill: none; }
.study-svg-dim      { stroke: #64748B; stroke-width: 1; fill: none; }
.study-svg-ref      { stroke: #DC2626; stroke-width: 1.5; stroke-dasharray: 6 3; fill: none; }
.study-svg-dot      { fill: #0F766E; }
.study-svg-label    { font-size: 11px; fill: #334155; font-family: sans-serif; }
.study-svg-tick     { stroke: #475569; stroke-width: 1; }
.study-svg-caption  { font-size: 12px; fill: #64748B; font-family: sans-serif; font-style: italic; text-anchor: middle; }
.study-svg-triangle { fill: #FEF9C3; stroke: #CA8A04; stroke-width: 1.5; }
.study-svg-div      { fill: none; stroke: #CBD5E1; stroke-width: 1; stroke-dasharray: 3 3; }

/* ==================== SPEED DIAGNOSIS SPRINT ==================== */

.sprint-panel {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 2rem;
    max-width: 700px;
    margin: 0 auto;
}

.sprint-gate, .sprint-start, .sprint-summary {
    text-align: center;
}

.sprint-gate h2, .sprint-start h2, .sprint-summary h2 {
    margin-bottom: 0.75rem;
}

.sprint-start .form-group {
    text-align: left;
    max-width: 360px;
    margin: 1rem auto;
}

.sprint-start .btn, .sprint-summary-actions .btn {
    margin: 0.4rem;
}

.sprint-profile-editor {
    margin-top: 1.5rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.btn-link {
    background: none;
    border: none;
    color: var(--secondary-color);
    text-decoration: underline;
    cursor: pointer;
    font-size: 0.9rem;
}

#sprintAvatarNameForm {
    margin-top: 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    align-items: center;
}

#sprintAvatarNameForm input {
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    max-width: 240px;
}

.sprint-hud {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding: 0.75rem 1rem;
    background: var(--light-bg);
    border-radius: 0.5rem;
    font-size: 1rem;
}

.sprint-timer {
    font-weight: 700;
    font-size: 1.3rem;
    color: var(--error-color);
}

.sprint-streak {
    color: var(--accent-color);
}

.sprint-summary-stats {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin: 1.5rem 0;
}

.sprint-your-rank {
    background: rgba(15, 118, 110, 0.08);
    border: 2px solid var(--primary-color);
    border-radius: 0.5rem;
    padding: 0.85rem 1.1rem;
    margin-bottom: 1.25rem;
    font-size: 0.95rem;
}

.sprint-your-rank--none {
    border-color: var(--border-color);
    background: var(--light-bg);
    color: var(--text-secondary);
}

.sprint-bot-row {
    color: var(--text-secondary);
}

.sprint-bot-tag {
    display: inline-block;
    background: #F1F5F9;
    color: var(--text-secondary);
    font-size: 0.72rem;
    font-weight: 600;
    padding: 0.1rem 0.5rem;
    border-radius: 999px;
    margin-left: 0.4rem;
    letter-spacing: 0.02em;
}

/* ==================== CLINICAL REPORT (DOSIMETRY CALCULATOR) ==================== */

.dos-report-controls {
    display: flex;
    align-items: flex-end;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.dos-report-controls .form-group {
    flex: 1;
    margin-bottom: 0;
}

.dos-report-header {
    text-align: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--primary-color);
}

.dos-report-header h2 {
    margin-bottom: 0.25rem;
}

.dos-report-header p {
    margin: 0.15rem 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.dos-report-meta {
    color: var(--text-primary) !important;
    font-weight: 600;
    font-size: 0.95rem !important;
}

.dos-report table.admin-posts-table th:first-child {
    width: 40%;
    color: var(--text-secondary);
    font-weight: 600;
}

.dos-report-disclaimer {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.8rem;
    color: var(--text-secondary);
}

@media print {
    * { transition: none !important; animation: none !important; }
    body > *:not(#dosReportModal) { display: none !important; }
    #dosReportModal {
        display: block !important;
        position: static;
        background: none;
    }
    #dosReportModal .modal-content {
        box-shadow: none;
        margin: 0 auto;
        max-width: 100%;
        width: 100%;
        background: #FFFFFF !important;
        color: #1E293B !important;
    }
    #dosReportModal .modal-content * {
        color: inherit;
        background: transparent !important;
        border-color: #CBD5E1 !important;
    }
    #dosReportModal .dos-report-header { border-bottom-color: #0F766E !important; }
    .no-print { display: none !important; }
}

/* ==================== DAILY CROSSWORD ====================*/

.cw-wrapper {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    align-items: flex-start;
}

.cw-grid-container {
    flex: 0 0 auto;
}

.cw-grid {
    display: grid;
    gap: 1px;
    background: var(--border-color);
    border: 2px solid var(--border-color);
    width: fit-content;
}

.cw-cell {
    position: relative;
    width: 32px;
    height: 32px;
    background: var(--card-bg);
}

.cw-cell-blocked {
    background: var(--dark-bg);
}

.cw-cell-number {
    position: absolute;
    top: 1px;
    left: 2px;
    font-size: 0.55rem;
    color: var(--text-secondary);
    pointer-events: none;
}

.cw-cell-input {
    width: 100%;
    height: 100%;
    border: none;
    background: transparent;
    text-align: center;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    text-transform: uppercase;
    padding: 0;
}

.cw-cell-input:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: -2px;
}

.cw-cell-active .cw-cell-input {
    background: rgba(15, 118, 110, 0.18);
}

.cw-cell-highlight .cw-cell-input {
    background: rgba(15, 118, 110, 0.08);
}

.cw-cell-correct .cw-cell-input {
    background: rgba(22, 163, 74, 0.25);
}

.cw-cell-incorrect .cw-cell-input {
    background: rgba(220, 38, 38, 0.2);
}

.cw-controls {
    display: flex;
    gap: 0.75rem;
    margin-top: 1rem;
}

.cw-clues {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    flex: 1 1 300px;
    min-width: 280px;
}

.cw-clue-list {
    list-style: none;
    font-size: 0.9rem;
}

.cw-clue {
    padding: 0.35rem 0;
    cursor: pointer;
    border-bottom: 1px solid var(--border-color);
}

.cw-clue:hover {
    color: var(--primary-color);
}

/* ==================== ICON SYSTEM ====================*/
.icon-inline {
    display: inline-flex;
    vertical-align: -0.14em;
    margin-right: 0.4rem;
    line-height: 1;
}
.icon-inline svg { width: 1em; height: 1em; display: block; }

.status-icon {
    display: inline-flex;
    vertical-align: -0.14em;
    margin-right: 0.3rem;
    line-height: 1;
}
.status-icon svg { width: 1em; height: 1em; display: block; }
.status-icon.status-success { color: var(--success-color); }
.status-icon.status-error { color: var(--error-color); }
.status-icon.status-warning { color: var(--accent-color); }

.risk-dot {
    display: inline-block;
    width: 0.6em;
    height: 0.6em;
    border-radius: 50%;
    margin-right: 0.35rem;
    vertical-align: middle;
}
.risk-dot.risk-safe { background: var(--success-color); }
.risk-dot.risk-caution { background: var(--accent-color); }
.risk-dot.risk-high { background: var(--error-color); }