:root {
    --bg: #f4efe5;
    --panel: rgba(255, 252, 245, 0.88);
    --panel-strong: #fffaf0;
    --text: #1f1f1a;
    --muted: #5f5a4f;
    --line: rgba(47, 41, 31, 0.12);
    --shared: #d8efe4;
    --left-only: #f4d2cc;
    --right-only: #f4d2cc;
    --match-surface: rgba(217, 240, 234, 0.72);
    --different-surface: rgba(247, 214, 209, 0.72);
    --exists-bg: #d9f0ea;
    --exists-border: #3a8a7a;
    --exists-text: #1f5f73;
    --missing-bg: #f7d6d1;
    --missing-border: #b64d4d;
    --missing-text: #8f2f2f;
    --accent: #8c3d23;
    --accent-2: #2d5d7b;
    --shadow: 0 18px 60px rgba(52, 43, 28, 0.12);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: Georgia, "Times New Roman", serif;
    color: var(--text);
    background:
        radial-gradient(circle at top left, rgba(140, 61, 35, 0.16), transparent 32%),
        radial-gradient(circle at top right, rgba(45, 93, 123, 0.2), transparent 28%),
        linear-gradient(180deg, #f7f2e7 0%, #efe7d8 100%);
}

.page-shell {
    width: min(1320px, calc(100% - 32px));
    margin: 0 auto;
    padding: 32px 0 48px;
}

.hero,
.control-card,
.summary-grid,
.compare-shell,
.empty-state {
    margin-bottom: 24px;
}

.hero,
.control-card,
.compare-shell,
.book-overview-card,
.empty-state {
    background: var(--panel);
    backdrop-filter: blur(14px);
    border: 1px solid rgba(255, 255, 255, 0.6);
    border-radius: 24px;
    box-shadow: var(--shadow);
}

.hero {
    padding: 32px;
}

.brand-lockup {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
}

.brand-logo {
    width: clamp(180px, 26vw, 320px);
    height: auto;
    display: block;
}

.eyebrow {
    margin: 0 0 8px;
    font-size: 0.82rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--accent);
}

h1,
h2,
p {
    margin-top: 0;
}

h1 {
    font-size: clamp(2.4rem, 5vw, 4.5rem);
    line-height: 0.95;
    margin-bottom: 12px;
}

.lede {
    max-width: 62rem;
    font-size: 1.05rem;
    color: var(--muted);
}

.control-card {
    padding: 20px;
}

.control-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}

label {
    display: flex;
    flex-direction: column;
    gap: 8px;
    font-size: 0.92rem;
}

label span {
    color: var(--muted);
}

select {
    width: 100%;
    padding: 12px 14px;
    border-radius: 14px;
    border: 1px solid var(--line);
    background: var(--panel-strong);
    color: var(--text);
    font: inherit;
}

.share-row {
    margin-top: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.share-button {
    border: 1px solid var(--line);
    background: var(--panel-strong);
    color: var(--text);
    border-radius: 999px;
    padding: 10px 16px;
    font: inherit;
    cursor: pointer;
}

.share-button:hover {
    background: rgba(255, 255, 255, 0.7);
}

.share-status {
    color: var(--muted);
    font-size: 0.92rem;
}

.summary-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
}

.summary-card {
    padding: 18px 20px;
    border-radius: 20px;
    background: var(--panel);
    border: 1px solid rgba(255, 255, 255, 0.7);
    box-shadow: var(--shadow);
}

.summary-card span {
    display: block;
    margin-bottom: 8px;
    color: var(--muted);
}

.summary-card strong {
    font-size: 2rem;
}

.summary-card-match {
    background: var(--match-surface);
}

.summary-card-different {
    background: var(--different-surface);
}

.book-overview-card {
    padding: 22px;
    margin-bottom: 24px;
    box-shadow: var(--shadow);
}

.book-overview-header {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 18px;
}

.book-overview-note {
    margin-bottom: 0;
    color: var(--muted);
}

.book-overview-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 14px;
}

.book-chip {
    display: block;
    padding: 16px 18px;
    border-radius: 18px;
    border: 1px solid var(--line);
    background: var(--panel-strong);
}

.book-chip-match {
    background: var(--match-surface);
}

.book-chip-different {
    background: var(--different-surface);
}

.book-chip-name {
    font-weight: 700;
}

.book-chip-top {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}

.book-chip-status {
    margin-left: auto;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 0.76rem;
}

.book-chip-counts {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 14px;
    color: var(--muted);
    font-size: 0.92rem;
}

.tree-shell {
    overflow: hidden;
    background: var(--panel);
    backdrop-filter: blur(14px);
    border: 1px solid rgba(255, 255, 255, 0.6);
    border-radius: 24px;
    box-shadow: var(--shadow);
}

.tree-header,
.verse-table {
    display: grid;
    grid-template-columns: 1.1fr 0.7fr 1.1fr;
}

.tree-header {
    padding: 20px 24px 10px;
    border-bottom: 1px solid var(--line);
}

.tree-header-center {
    text-align: center;
}

.tree-header-right {
    text-align: right;
}

.tree-header p {
    margin-bottom: 0;
    color: var(--muted);
}

.tree-list {
    padding: 18px;
}

.tree-book,
.tree-chapter {
    border: 1px solid var(--line);
    border-radius: 20px;
    margin-bottom: 14px;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.45);
}

.tree-book-match,
.tree-chapter-match {
    background: var(--match-surface);
}

.tree-book-different,
.tree-chapter-different {
    background: var(--different-surface);
}

.tree-summary {
    width: 100%;
    border: 0;
    background: transparent;
    padding: 18px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    cursor: pointer;
    text-align: left;
    font: inherit;
    color: inherit;
    text-decoration: none;
}

.tree-summary:hover {
    background: rgba(255, 255, 255, 0.2);
}

.tree-summary-chapter {
    border-top: 1px solid rgba(47, 41, 31, 0.08);
}

.tree-summary::after {
    content: "+";
    margin-left: auto;
    font-size: 1.5rem;
    line-height: 1;
    color: var(--muted);
}

.tree-summary[aria-expanded="true"]::after {
    content: "\2212";
}

.tree-title {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.1rem;
}

.tree-meta {
    display: flex;
    gap: 18px;
    flex-wrap: wrap;
    justify-content: flex-end;
    color: var(--muted);
    font-size: 0.92rem;
}

.status-dot {
    width: 14px;
    height: 14px;
    border-radius: 999px;
    flex: 0 0 auto;
}

.status-dot-match {
    background: #2a8b68;
}

.status-dot-different {
    background: #b64d4d;
}

.chapter-list {
    padding: 0 16px 16px;
}

.accordion-panel[hidden] {
    display: none;
}

.verse-table-wrap {
    padding: 0 14px 14px;
}

.verse-table {
    align-items: center;
}

.verse-table-head {
    padding: 12px 16px;
    color: var(--muted);
    font-size: 0.88rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.verse-row {
    min-height: 54px;
    padding: 10px 16px;
    border-top: 1px solid rgba(47, 41, 31, 0.06);
}

.verse-row-shared {
    background: var(--shared);
}

.verse-row-left_only,
.verse-row-right_only {
    background: var(--different-surface);
}

.verse-center {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.status-label {
    display: inline-block;
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--muted);
}

.pill {
    min-width: 96px;
    text-align: center;
    padding: 8px 12px;
    border-radius: 999px;
    border: 1px solid rgba(47, 41, 31, 0.1);
    font-size: 0.9rem;
}

.pill-link {
    display: inline-block;
    text-decoration: none;
}

.pill-link:hover {
    text-decoration: underline;
}

.pill-on {
    background: var(--exists-bg);
    border-color: var(--exists-border);
    color: var(--exists-text);
}

.pill-off {
    background: var(--missing-bg);
    border-color: var(--missing-border);
    color: var(--missing-text);
}

.empty-state {
    padding: 40px 28px;
    text-align: center;
}

@media (max-width: 960px) {
    .control-grid,
    .summary-grid,
    .tree-header,
    .verse-table,
    .tree-summary {
        grid-template-columns: 1fr;
    }

    .tree-header-right,
    .tree-header-center {
        text-align: left;
    }

    .book-overview-header {
        align-items: flex-start;
        flex-direction: column;
    }

    .share-row {
        align-items: flex-start;
        flex-direction: column;
    }

    .tree-meta {
        justify-content: flex-start;
    }
}