:root {
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-serif: 'Merriweather', Georgia, serif;

    --color-bg: #f8f9fa;
    --color-surface: #ffffff;
    --color-text: #2c3e50;
    --color-text-light: #7f8c8d;
    --color-primary: #2c3e50;
    --color-primary-hover: #34495e;
    --color-accent: #3498db;
    --color-border: #ecf0f1;
    --color-verse-hover: #f8f9fa;
    --color-verse-target: #fff3cd;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.05);

    --spacing-unit: 8px;
    --container-width: 740px;
    --reading-scale: 1;
}

@media (prefers-color-scheme: dark) {
    :root {
        --color-bg: #121212;
        --color-surface: #1e1e1e;
        --color-text: #e0e0e0;
        --color-text-light: #a0a0a0;
        --color-primary: #e0e0e0;
        --color-primary-hover: #ffffff;
        --color-accent: #64b5f6;
        --color-border: #333333;
        --color-verse-hover: #2a2a2a;
        --color-verse-target: #3d3520;
        --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.2);
        --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.2);
        --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.2);
    }
}

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

body {
    font-family: var(--font-sans);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Layout */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Typography */
h1,
h2,
h3 {
    font-family: var(--font-sans);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

h1 {
    font-size: 2.5rem;
    color: var(--color-text);
    text-align: center;
    margin-top: 2rem;
}

button,
input,
textarea {
    font: inherit;
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: all 0.2s ease;
}

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

.skip-link {
    position: absolute;
    left: -9999px;
    top: 8px;
    z-index: 2000;
    padding: 8px 12px;
    color: #fff;
    background: var(--color-primary);
}

.skip-link:focus {
    left: 8px;
}

.provenance {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 32px 20px;
}

.provenance li {
    margin: 16px 0;
}

.search-panel,
.reading-tools {
    max-width: var(--container-width);
    margin: 0 auto 28px;
    padding: 20px;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    background: var(--color-surface);
}

.search-panel h2,
.reading-tools h2 {
    margin-bottom: 8px;
    font-size: 1.1rem;
}

.search-panel label,
.reading-tools label {
    display: block;
    margin-bottom: 6px;
    color: var(--color-text-light);
    font-size: 0.85rem;
}

#search-input,
#verse-note {
    width: 100%;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 10px 12px;
    color: var(--color-text);
    background: var(--color-bg);
}

.search-status,
.reading-tools [role="status"] {
    margin-top: 8px;
    color: var(--color-text-light);
    font-size: 0.85rem;
}

.search-results {
    display: grid;
    gap: 12px;
    margin: 16px 0 0;
    padding-left: 24px;
}

.search-results p {
    margin-top: 3px;
    color: var(--color-text-light);
    font-family: var(--font-serif);
    font-size: 0.9rem;
}

.reading-tool-actions,
.note-row {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 14px;
}

.reading-tool-actions button,
.note-row button {
    border: 1px solid var(--color-border);
    border-radius: 999px;
    padding: 8px 12px;
    color: var(--color-text);
    background: var(--color-bg);
    cursor: pointer;
    font-size: 0.82rem;
}

.reading-tool-actions button:hover,
.note-row button:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.note-row textarea {
    flex: 1 1 280px;
    resize: vertical;
}

.bookmark-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 16px;
    margin: 0 0 14px;
    padding-left: 18px;
    color: var(--color-text-light);
    font-size: 0.85rem;
}

.study-list {
    display: grid;
    gap: 10px;
    margin: 12px 0 24px;
    padding-left: 20px;
}

.import-label {
    align-self: center;
    margin: 0 !important;
    border: 1px solid var(--color-border);
    border-radius: 999px;
    padding: 8px 12px;
    cursor: pointer;
    font-size: 0.82rem !important;
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
    }
}

/* Navigation */
nav.breadcrumb {
    padding: 20px 0;
    margin-bottom: 20px;
    font-size: 0.9rem;
    color: var(--color-text-light);
}

nav.breadcrumb ol {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
}

nav.breadcrumb li:not(:last-child)::after {
    content: '/';
    margin-left: 8px;
    color: var(--color-border);
}

nav.breadcrumb a {
    color: var(--color-text-light);
    font-weight: 500;
}

nav.breadcrumb a:hover {
    color: var(--color-accent);
}

/* Header */
header {
    margin-bottom: 40px;
    text-align: center;
}

.version-info {
    color: var(--color-text-light);
    font-size: 0.95rem;
    margin-top: 8px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.version-switcher {
    position: relative;
    display: inline-block;
}

.version-switcher-btn {
    background: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text-light);
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s ease;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.version-switcher-btn:hover,
.version-switcher-btn[aria-expanded="true"] {
    border-color: var(--color-accent);
    color: var(--color-accent);
    background-color: var(--color-surface);
}

.version-dropdown {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    background-color: var(--color-surface);
    min-width: 180px;
    box-shadow: var(--shadow-lg);
    border-radius: 8px;
    padding: 8px 0;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s cubic-bezier(0.165, 0.84, 0.44, 1);
    border: 1px solid var(--color-border);
}

.version-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(4px);
}

.version-dropdown ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.version-dropdown li {
    display: block;
}

.version-dropdown a {
    display: block;
    padding: 8px 16px;
    color: var(--color-text);
    font-size: 0.9rem;
    text-transform: none;
    letter-spacing: normal;
    font-weight: 500;
    transition: background-color 0.2s ease;
}

.version-dropdown a:hover {
    background-color: var(--color-bg);
    color: var(--color-accent);
}

.version-dropdown a.active {
    color: var(--color-accent);
    background-color: var(--color-verse-hover);
    font-weight: 600;
}

/* Arrow indicator for dropdown */
.version-dropdown::before {
    content: '';
    position: absolute;
    top: -5px;
    left: 50%;
    transform: translateX(-50%) rotate(45deg);
    width: 10px;
    height: 10px;
    background-color: var(--color-surface);
    border-left: 1px solid var(--color-border);
    border-top: 1px solid var(--color-border);
}

/* Chapter Navigation */
.chapter-nav {
    position: sticky;
    top: 20px;
    z-index: 100;
    margin-bottom: 40px;
    pointer-events: none;
    /* Allow clicking through the container */
}

.chapter-nav ul {
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 900px;
    /* Wider than content to sit outside */
    margin: 0 auto;
    padding: 0 20px;
    pointer-events: auto;
    /* Re-enable clicks on buttons */
}

.chapter-nav a {
    font-weight: 600;
    padding: 10px 20px;
    border-radius: 50px;
    background-color: var(--color-surface);
    color: var(--color-text);
    box-shadow: var(--shadow-md);
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
}

.chapter-nav a:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: var(--color-accent);
}

.comparison-toolbar,
.comparison-panel {
    max-width: var(--container-width);
    margin: 0 auto 24px;
}

.comparison-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 18px 22px;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    background: var(--color-surface);
}

.comparison-toolbar h2 {
    margin-bottom: 4px;
    font-size: 1rem;
}

.comparison-toolbar p,
.comparison-status {
    color: var(--color-text-light);
    font-size: 0.85rem;
}

.compare-button {
    flex: 0 0 auto;
    border: 0;
    border-radius: 999px;
    padding: 10px 16px;
    color: #fff;
    background: var(--color-primary);
    cursor: pointer;
    font: inherit;
    font-size: 0.85rem;
    font-weight: 600;
}

.compare-button:hover {
    background: var(--color-primary-hover);
}

.comparison-panel {
    padding: 20px;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    background: var(--color-surface);
}

.comparison-options {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 18px;
    margin: 16px 0;
    font-size: 0.9rem;
}

.comparison-options input {
    accent-color: var(--color-accent);
}

.comparison-table-wrap {
    overflow-x: auto;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    font-family: var(--font-serif);
    font-size: 0.95rem;
    line-height: 1.55;
}

.comparison-table th,
.comparison-table td {
    padding: 12px;
    border-top: 1px solid var(--color-border);
    text-align: left;
    vertical-align: top;
}

.comparison-table thead th {
    font-family: var(--font-sans);
    font-size: 0.78rem;
    color: var(--color-text-light);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.comparison-table tbody th {
    width: 48px;
    font-family: var(--font-sans);
    color: var(--color-text-light);
}

/* Verses */
.chapter-content {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 40px;
    background-color: var(--color-surface);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 60px;
}

.verses {
    font-family: var(--font-serif);
    font-size: calc(1.35rem * var(--reading-scale));
    line-height: 1.8;
    color: var(--color-text);
}

@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
        margin-top: 1rem;
    }

    header {
        margin-bottom: 24px;
        padding: 0 16px;
    }

    .version-info {
        flex-wrap: wrap;
    }

    .comparison-toolbar {
        align-items: stretch;
        flex-direction: column;
        margin: 0 12px 18px;
        padding: 16px;
    }

    .comparison-panel {
        margin: 0 12px 18px;
        padding: 16px;
    }

    .search-panel,
    .reading-tools {
        margin: 0 12px 18px;
        padding: 16px;
    }

    .compare-button {
        width: 100%;
    }

    .chapter-content {
        padding: 16px 12px;
        box-shadow: none;
        background-color: transparent;
    }

    .chapter-nav {
        top: 0;
        background: var(--color-bg);
        padding: 10px 0;
        margin-bottom: 20px;
        border-bottom: 1px solid var(--color-border);
    }

    .chapter-nav ul {
        max-width: 100%;
    }

    .chapter-nav a {
        box-shadow: none;
        background: transparent;
        padding: 8px;
    }

    .verses {
        font-size: 1.12rem;
        line-height: 1.75;
    }

    .verse {
        margin-bottom: 12px;
    }

    .comparison-table {
        min-width: 560px;
    }

    .toast {
        right: 12px;
        bottom: 16px;
        left: 12px;
        justify-content: center;
        transform: translateY(100px);
    }

    .toast.show {
        transform: translateY(0);
    }
}

.verse {
    position: relative;
    padding: 4px 0 4px 0;
    margin-bottom: 16px;
    transition: background-color 0.2s ease;
}

.verse:target,
.verse.verse-highlight {
    background-color: var(--color-verse-target);
    padding: 12px;
    margin: -12px -12px 16px -12px;
    border-radius: 8px;
}

.verse-number {
    display: inline-block;
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-light);
    margin-right: 8px;
    vertical-align: super;
    line-height: 1;
    opacity: 0.7;
    text-decoration: none;
    user-select: none;
}

.verse:hover .verse-number {
    opacity: 1;
    color: var(--color-accent);
}

.verse-text {
    display: inline;
}

/* Footer */
footer {
    padding: 40px 0;
    border-top: 1px solid var(--color-border);
    text-align: center;
    color: var(--color-text-light);
    font-size: 0.9rem;
    background-color: var(--color-bg);
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background-color: var(--color-text);
    color: var(--color-bg);
    padding: 12px 24px;
    border-radius: 50px;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: 8px;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
}