@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@200..800&family=Noto+Serif:ital,wght@0,100..900;1,100..900&display=swap');

:root {
    /* Colors */
    --primary: #012d1d;
    --primary-container: #1b4332;
    --secondary: #5d4632;      /* Darker wood for contrast */
    --surface: #fcf9f6;
    --surface-container-low: #f9f7f5; /* Lighter sidebar */
    --surface-container: #f4f0ec;
    --surface-container-highest: #e9e4de;
    --surface-container-lowest: #ffffff;
    --on-surface: #1c1c1a;
    --on-primary: #ffffff;
    --on-secondary-fixed: #2c1603;
    --on-primary-fixed: #002114;
    --primary-fixed: #c1ecd4;
    --secondary-fixed: #ffdcc1;
    --error-container: #ffdad6;
    --on-error-container: #93000a;
    --outline-variant: rgba(193, 200, 194, 0.2);

    /* Typography */
    --font-serif: 'Noto Serif', serif;
    --font-sans: 'Manrope', sans-serif;

    /* Spacing */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-12: 3rem;

    /* Radius */
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-full: 9999px;
}

body {
    background-color: var(--surface);
    color: var(--on-surface);
    font-family: var(--font-sans);
    line-height: 1.6;
    margin: 0;
}

h1, h2, h3, h4, .serif {
    font-family: var(--font-serif);
    color: var(--primary);
}

.sanctuary-container {
    padding: var(--spacing-8) var(--spacing-6);
    max-width: 1400px;
    margin: 0 auto;
}

/* Surfaces */
.bg-surface { background-color: var(--surface); }
.bg-surface-low { background-color: var(--surface-container-low); }
.bg-surface-container { background-color: var(--surface-container); }
.bg-surface-lowest { background-color: var(--surface-container-lowest); }

/* Buttons */
.btn-sanctuary-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-container));
    color: var(--on-primary);
    border: none;
    padding: var(--spacing-3) var(--spacing-6);
    border-radius: var(--radius-lg);
    font-family: var(--font-sans);
    font-weight: 700;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    text-decoration: none;
    cursor: pointer;
}

.btn-sanctuary-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(1, 45, 29, 0.15);
    opacity: 0.95;
    color: white;
}

.btn-sanctuary-outline {
    background: transparent;
    color: var(--secondary);
    border: 1px solid var(--outline-variant);
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: var(--radius-lg);
    font-family: var(--font-sans);
    transition: all 0.2s ease;
}

.btn-sanctuary-outline:hover {
    background-color: var(--surface-container-low);
    border-color: var(--secondary);
}

/* Badges */
.badge-sanctuary {
    padding: var(--spacing-1) var(--spacing-4);
    border-radius: var(--radius-full);
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.badge-available {
    background-color: var(--primary-fixed);
    color: var(--on-primary-fixed);
}

.badge-borrowed {
    background-color: var(--secondary-fixed);
    color: var(--on-secondary-fixed);
}

.badge-overdue {
    background-color: var(--error-container);
    color: var(--on-error-container);
}

.badge-neutral {
    background-color: var(--surface-container);
    color: var(--secondary);
}

/* Alerts */
.alert-sanctuary {
    padding: var(--spacing-4) var(--spacing-6);
    border-radius: var(--radius-lg);
    font-family: var(--font-sans);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-6);
    border-left: 4px solid transparent;
    animation: slideDown 0.4s ease-out;
}

.alert-sanctuary-info {
    background-color: var(--surface-container-low);
    color: var(--on-secondary-fixed);
    border-left-color: var(--secondary);
    border: 1px solid var(--outline-variant);
}

@keyframes slideDown {
    from { transform: translateY(-10px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

/* Cards */
.card-sanctuary {
    background-color: var(--surface-container-lowest);
    border: none;
    border-radius: var(--radius-xl);
    padding: var(--spacing-6);
    transition: all 0.3s ease;
}

.card-sanctuary.floating {
    box-shadow: 0 10px 40px rgba(28, 28, 26, 0.05);
}

/* Book Cover */
.book-cover-wrap {
    background-color: var(--surface-container);
    border-radius: var(--radius-xl);
    padding: var(--spacing-4);
    display: flex;
    justify-content: center;
    align-items: center;
    aspect-ratio: 2/3;
}

.book-cover-wrap img {
    border-radius: var(--radius-md); /* Spinal rounding */
    box-shadow: 5px 5px 15px rgba(0,0,0,0.1);
    max-height: 100%;
}

/* Details List */
.details-list dt {
    font-family: var(--font-sans);
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    color: var(--secondary);
    margin-top: var(--spacing-4);
}

.details-list dd {
    font-family: var(--font-serif);
    color: var(--on-surface);
    margin-bottom: 0;
}

/* Glass effect */
.glass {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

/* Layout Overrides */
.page {
    background-color: var(--surface);
}

.sidebar {
    background-color: var(--surface-container-low) !important;
    border-right: 1px solid var(--outline-variant);
    width: 280px;
}

main {
    background-color: var(--surface) !important;
}

.top-row {
    background-color: var(--surface-container-low) !important;
    border-bottom: 1px solid var(--outline-variant);
    height: 3.5rem;
    display: flex;
    align-items: center;
}

.content {
    padding-top: 0 !important;
}

/* Typography refinements */
p, li {
    font-family: var(--font-sans);
    color: var(--on-surface);
}

.serif {
    font-family: var(--font-serif) !important;
}

.breadcrumb-item a {
    color: var(--secondary) !important;
    font-weight: 600;
}

.breadcrumb-item.active {
    color: var(--primary) !important;
    font-weight: 700;
}

/* Search Bar (The Entryway) */
.search-entryway {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    padding: var(--spacing-4) var(--spacing-6);
    border-radius: var(--radius-xl);
    background-color: var(--surface-container-lowest);
    border: 1px solid var(--outline-variant);
    transition: all 0.3s ease;
    width: 100%;
    color: var(--on-surface);
}

.search-entryway::placeholder {
    font-family: var(--font-serif);
    font-style: italic;
    color: #a0a0a0;
}

.search-entryway:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 10px 30px rgba(1, 45, 29, 0.08);
    background-color: white;
}

/* Mobile Optimizations */
@media (max-width: 768px) {
    .sanctuary-container {
        padding: var(--spacing-4) var(--spacing-3);
    }

    .card-sanctuary {
        padding: var(--spacing-4);
        border-radius: var(--radius-lg); /* Slightly smaller rounding on mobile */
    }

    .search-entryway {
        font-size: 1.1rem;
        padding: var(--spacing-4);
        padding-right: 60px; /* Leave space for icon if button is absolute */
    }

    .btn-sanctuary-primary, .btn-sanctuary-outline {
        padding: var(--spacing-3) var(--spacing-4);
        font-size: 0.9rem;
    }

    /* Stack filter groups more tightly */
    .row.g-5 {
        --bs-gutter-y: 2.5rem;
    }

    .rounded-xl {
        border-radius: var(--radius-lg) !important;
    }
}