:root {
    --bg: #f5efe4;
    --paper: #fffdf8;
    --paper-strong: #fff8ee;
    --ink: #1f2933;
    --muted: #52606d;
    --line: #e5d8c6;
    --accent: #b85c38;
    --accent-dark: #8a3d20;
    --highlight: #f3c98b;
    --shadow: 0 18px 50px rgba(96, 57, 31, 0.12);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Manrope", sans-serif;
    color: var(--ink);
    background:
        radial-gradient(circle at top left, rgba(243, 201, 139, 0.34), transparent 28%),
        linear-gradient(180deg, #fbf6ed 0%, var(--bg) 100%);
}

a {
    color: inherit;
    text-decoration: none;
}

.page-shell {
    width: min(80vw, 1280px);
    margin: 0 auto;
    padding: 2rem 0 3rem;
}

.site-header {
    display: flex;
    justify-content: space-between;
    gap: 1.5rem;
    align-items: flex-start;
    margin-bottom: 2rem;
}

.site-title,
h1,
h2,
h3 {
    margin: 0;
    line-height: 1.1;
}

.site-title {
    max-width: 12ch;
    font-size: clamp(2rem, 4vw, 3.25rem);
}

.eyebrow {
    margin: 0 0 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--accent-dark);
    font-size: 0.76rem;
    font-weight: 800;
}

.nav-menu {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: flex-end;
    align-items: flex-start;
}

.nav-link {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.8rem 1rem;
    border-radius: 999px;
    background: rgba(255, 253, 248, 0.88);
    border: 1px solid rgba(184, 92, 56, 0.16);
    font-weight: 700;
}

.nav-dropdown {
    position: relative;
}

.nav-link-parent {
    padding-right: 0.9rem;
}

.nav-caret {
    font-size: 0.8rem;
    color: var(--accent-dark);
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 0.55rem);
    left: 0;
    min-width: 220px;
    padding: 0.55rem;
    border-radius: 18px;
    border: 1px solid var(--line);
    background: rgba(255, 253, 248, 0.98);
    box-shadow: var(--shadow);
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: opacity 160ms ease, transform 160ms ease, visibility 160ms ease;
    z-index: 20;
}

.dropdown-item {
    display: block;
    padding: 0.8rem 0.9rem;
    border-radius: 12px;
    font-weight: 700;
    color: var(--ink);
}

.dropdown-item:hover,
.dropdown-item:focus-visible {
    background: rgba(243, 201, 139, 0.2);
    outline: none;
}

.nav-dropdown:hover .dropdown-menu,
.nav-dropdown:focus-within .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.main-content {
    display: grid;
    gap: 1.5rem;
}

.utility-bar {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.flash-stack {
    display: grid;
    gap: 0.6rem;
    flex: 1;
}

.flash-message {
    padding: 0.9rem 1rem;
    border-radius: 14px;
    border: 1px solid var(--line);
    background: rgba(255, 253, 248, 0.92);
}

.flash-success {
    border-color: rgba(42, 122, 69, 0.25);
    background: rgba(227, 247, 233, 0.95);
}

.flash-error {
    border-color: rgba(176, 58, 46, 0.25);
    background: rgba(252, 234, 230, 0.95);
}

.admin-tools {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.admin-link {
    white-space: nowrap;
}

.session-chip {
    display: inline-flex;
    align-items: center;
    padding: 0.8rem 1rem;
    border-radius: 999px;
    background: rgba(243, 201, 139, 0.22);
    color: var(--accent-dark);
    font-weight: 800;
}

.admin-button {
    padding: 0.8rem 1rem;
    border: 1px solid rgba(184, 92, 56, 0.16);
    border-radius: 999px;
    background: rgba(255, 253, 248, 0.88);
    color: var(--ink);
    font: inherit;
    font-weight: 700;
    cursor: pointer;
}

.site-footer {
    margin-top: 2rem;
    padding: 1rem 0 0.5rem;
    border-top: 1px solid rgba(184, 92, 56, 0.18);
    text-align: center;
    color: var(--muted);
    font-size: 0.95rem;
}

.hero-card,
.panel,
.timeline-card {
    background: linear-gradient(180deg, var(--paper) 0%, var(--paper-strong) 100%);
    border: 1px solid var(--line);
    border-radius: 24px;
    box-shadow: var(--shadow);
}

.hero-card {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 1.5rem;
    padding: 2rem;
}

.hero-card h2 {
    font-size: clamp(1.8rem, 3vw, 2.7rem);
    max-width: 16ch;
}

.hero-copy,
.panel p,
.timeline-card p,
.compact-list li,
.strategic-note,
.info-band span {
    color: var(--muted);
    line-height: 1.7;
}

.hero-metrics {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
    align-self: end;
}

.metric-box {
    padding: 1rem;
    border-radius: 18px;
    background: #fff;
    border: 1px solid var(--line);
}

.metric-value {
    display: block;
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--accent-dark);
}

.metric-label {
    color: var(--muted);
    font-size: 0.92rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.85rem;
    margin-top: 1rem;
}

.stat-card {
    padding: 1rem;
    border-radius: 18px;
    border: 1px solid var(--line);
    background: #fff;
}

.stat-value {
    display: block;
    font-size: 1.7rem;
    font-weight: 800;
    color: var(--accent-dark);
}

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

.content-grid,
.subject-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.5rem;
}

.panel,
.timeline-card {
    padding: 1.5rem;
}

.inset-panel {
    background: rgba(255, 255, 255, 0.72);
    box-shadow: none;
}

.subject-hero {
    align-items: stretch;
}

.panel-wide {
    grid-column: span 2;
}

.table-wrap {
    overflow-x: auto;
    margin: 1rem 0;
}

table {
    width: 100%;
    border-collapse: collapse;
    min-width: 640px;
}

th,
td {
    padding: 0.95rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--line);
}

th {
    font-size: 0.92rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--accent-dark);
    background: rgba(243, 201, 139, 0.18);
}

.strategic-note,
.info-band {
    margin-top: 1rem;
    padding: 1rem 1.1rem;
    border-radius: 16px;
    background: rgba(243, 201, 139, 0.16);
}

.compact-list {
    margin: 1rem 0 0;
    padding-left: 1.2rem;
}

.compact-list li + li {
    margin-top: 0.6rem;
}

.phase-list li {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}

.text-link {
    display: inline-block;
    margin-top: 1rem;
    color: var(--accent-dark);
    font-weight: 800;
}

.inline-link {
    margin-top: 0;
}

.resource-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.resource-card {
    padding: 1rem;
    border-radius: 18px;
    border: 1px solid var(--line);
    background: #fff;
}

.resource-card h3,
.resource-card h4 {
    margin: 0;
}

.resource-type {
    margin: 0 0 0.45rem;
    color: var(--accent-dark);
    font-size: 0.8rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.official-source-label {
    margin: 0.9rem 0 0.35rem;
    color: var(--muted);
    font-size: 0.9rem;
    font-weight: 700;
}

.muted-inline {
    display: inline-block;
    margin-top: 0.8rem;
    color: var(--muted);
}

.tracker-item {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    align-items: center;
    flex-wrap: nowrap;
}

.tracker-copy {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    flex-wrap: nowrap;
    min-width: 0;
    flex: 1 1 auto;
}

.tracker-copy .text-link {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.tracker-status {
    padding: 0.2rem 0.7rem;
    border-radius: 999px;
    background: rgba(243, 201, 139, 0.2);
    color: var(--accent-dark);
    font-size: 0.84rem;
    font-weight: 800;
    white-space: nowrap;
}

.tracker-form {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    flex-wrap: nowrap;
    flex: 0 0 auto;
}

.tracker-form select {
    min-width: 150px;
    padding: 0.7rem 0.85rem;
    border-radius: 12px;
    border: 1px solid var(--line);
    background: #fff;
    color: var(--ink);
    font: inherit;
}

.timeline {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.5rem;
}

.timeline-range {
    font-weight: 800;
    color: var(--accent-dark);
}

.form-card {
    width: min(560px, 100%);
    margin: 0 auto;
}

.auth-form {
    display: grid;
    gap: 1rem;
}

.form-field {
    display: grid;
    gap: 0.45rem;
}

.form-field label {
    font-weight: 700;
}

.form-field input {
    width: 100%;
    padding: 0.9rem 1rem;
    border-radius: 14px;
    border: 1px solid var(--line);
    background: #fff;
    color: var(--ink);
    font: inherit;
}

.form-field select {
    width: 100%;
    padding: 0.9rem 1rem;
    border-radius: 14px;
    border: 1px solid var(--line);
    background: #fff;
    color: var(--ink);
    font: inherit;
}

.form-field textarea {
    width: 100%;
    padding: 0.9rem 1rem;
    border-radius: 14px;
    border: 1px solid var(--line);
    background: #fff;
    color: var(--ink);
    font: inherit;
    resize: vertical;
}

.form-hint {
    margin-top: 0.5rem;
    color: var(--muted);
}

.primary-button {
    width: fit-content;
    padding: 0.95rem 1.2rem;
    border: none;
    border-radius: 999px;
    background: var(--accent);
    color: #fffaf4;
    font: inherit;
    font-weight: 800;
    cursor: pointer;
}

.secondary-button {
    width: fit-content;
    padding: 0.75rem 1rem;
    border: 1px solid rgba(184, 92, 56, 0.2);
    border-radius: 999px;
    background: rgba(255, 253, 248, 0.92);
    color: var(--accent-dark);
    font: inherit;
    font-weight: 800;
    cursor: pointer;
}

.auth-form .primary-button {
    margin-top: 0.25rem;
}

.user-edit-form {
    display: grid;
    gap: 0.6rem;
}

.user-edit-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.6rem;
}

.user-edit-grid input {
    width: 100%;
    padding: 0.7rem 0.85rem;
    border-radius: 12px;
    border: 1px solid var(--line);
    background: #fff;
    color: var(--ink);
    font: inherit;
}

.user-action-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    margin-top: 0.6rem;
}

.compact-form {
    margin-top: 1rem;
}

.inline-form-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.8rem;
}

.subject-progress-list {
    display: grid;
    gap: 0.9rem;
    margin-top: 1rem;
}

.subject-progress-item {
    display: grid;
    gap: 0.45rem;
}

.subject-progress-head {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
    color: var(--muted);
}

.progress-bar {
    width: 100%;
    height: 12px;
    border-radius: 999px;
    background: rgba(229, 216, 198, 0.8);
    overflow: hidden;
}

.progress-bar span {
    display: block;
    height: 100%;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--accent) 0%, #d98a54 100%);
}

.chapter-material-stack {
    display: grid;
    gap: 1.4rem;
}

.chapter-material-stack .resource-list {
    grid-template-columns: 1fr;
}

.material-group {
    display: grid;
    gap: 0.7rem;
}

.material-section {
    padding-top: 0.2rem;
}

.section-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.note-block {
    margin-top: 0.9rem;
    width: 100%;
    box-sizing: border-box;
    padding: 1rem;
    border-radius: 16px;
    background: rgba(243, 201, 139, 0.12);
    border: 1px solid var(--line);
    white-space: pre-wrap;
    color: var(--ink);
    line-height: 1.7;
}

.video-frame {
    position: relative;
    width: 100%;
    padding-top: 56.25%;
    margin-top: 0.9rem;
    border-radius: 18px;
    overflow: hidden;
    background: #000;
}

.video-frame iframe {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

.admin-list-stack {
    display: grid;
    gap: 1rem;
    margin-top: 1rem;
}

.admin-item-card {
    padding: 1rem;
    border-radius: 18px;
    border: 1px solid var(--line);
    background: #fff;
}

.chapter-material-stack .resource-card {
    width: 100%;
    box-sizing: border-box;
}

@media (max-width: 820px) {
    .page-shell {
        width: min(100% - 1.5rem, 100%);
    }

    .site-header,
    .hero-card,
    .content-grid,
    .subject-grid,
    .timeline {
        grid-template-columns: 1fr;
        display: grid;
    }

    .hero-metrics {
        grid-template-columns: 1fr;
    }

    .stats-grid,
    .resource-list,
    .user-edit-grid,
    .inline-form-grid {
        grid-template-columns: 1fr;
    }

    .tracker-item,
    .tracker-copy,
    .tracker-form {
        flex-wrap: wrap;
    }

    .panel-wide {
        grid-column: auto;
    }

    .site-header {
        align-items: stretch;
    }

    .nav-menu {
        justify-content: flex-start;
        width: 100%;
    }

    .utility-bar,
    .admin-tools {
        flex-direction: column;
        align-items: stretch;
    }

    .nav-dropdown,
    .nav-link {
        width: 100%;
    }

    .dropdown-menu {
        position: static;
        min-width: 100%;
        margin-top: 0.55rem;
        opacity: 1;
        visibility: visible;
        transform: none;
        display: grid;
        gap: 0.35rem;
        background: rgba(255, 255, 255, 0.7);
        box-shadow: none;
    }
}

/* Chapter Summary */
.chapter-summary { display: flex; flex-direction: column; gap: 1rem; }
.summary-intro { font-size: 1rem; color: var(--text-secondary, #555); margin-bottom: 0.25rem; }
.summary-block { border-left: 3px solid var(--accent, #4f7df3); padding-left: 1rem; }
.summary-block h4 { margin: 1em 0 0.4rem; font-size: 0.95rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--text-primary, #111); }
.summary-block ul { margin: 0; padding-left: 1.25rem; display: flex; flex-direction: column; gap: 0.3rem; }
.summary-block li { font-size: 0.95rem; line-height: 1.55; }
.summary-neet { border-left-color: #e67e22; background: rgba(230,126,34,0.06); border-radius: 0 6px 6px 0; padding: 0.75rem 1rem; }
.summary-neet h4 { color: #c0621a; }
.summary-neet p { font-size: 0.95rem; margin: 0; }
.summary-resource { padding-top: 0.5rem; }

/* Q&A Section */
.qa-section { margin-top: 1.5rem; }
.qa-scroll-container { max-height: 600px; overflow-y: auto; display: flex; flex-direction: column; gap: 0.5rem; margin-top: 1rem; padding-right: 0.25rem; }
.qa-scroll-container::-webkit-scrollbar { width: 6px; }
.qa-scroll-container::-webkit-scrollbar-track { background: transparent; }
.qa-scroll-container::-webkit-scrollbar-thumb { background: rgba(0,0,0,0.15); border-radius: 3px; }
.qa-item { border: 1px solid rgba(0,0,0,0.08); border-radius: 8px; overflow: hidden; flex-shrink: 0; }
.qa-item[open] { border-color: var(--accent, #4f7df3); }

/* Alternative formatting: block layout instead of flexbox for the summary */
.qa-summary { 
    display: block;
    cursor: pointer; 
    list-style: none; 
    user-select: none; 
    outline: none; 
    padding: 0.75rem 1rem 0.75rem 2.5rem; /* Left padding for the arrow */
    background: rgba(0,0,0,0.02); 
    color: var(--text-primary, #1a1a1a);
    position: relative;
    min-height: 2.75rem;
    height: auto;
    box-sizing: border-box;
    font-size: 0.9rem;
    line-height: 1.5;
    white-space: normal;
    word-wrap: break-word;
    overflow-wrap: break-word;
}
.qa-item[open] .qa-summary { background: rgba(79,125,243,0.06); }
.qa-summary::-webkit-details-marker { display: none; }
.qa-summary::before { 
    content: "▶"; 
    position: absolute;
    left: 1rem;
    top: 0.9rem;
    font-size: 0.6rem; 
    color: var(--accent, #4f7df3); 
    transition: transform 0.2s; 
}
.qa-item[open] .qa-summary::before { transform: rotate(90deg); }

.qa-number { font-weight: 700; color: var(--accent, #4f7df3); margin-right: 0.5rem; }
.qa-text { color: var(--text-primary, #1a1a1a); }

.qa-answer { padding: 0.85rem 1rem 0.85rem 1rem; border-top: 1px solid rgba(0,0,0,0.06); font-size: 0.92rem; line-height: 1.65; background: #fff; }