:root {
    --lib-navy: #1a1a2e;
    --lib-navy-mid: #16213e;
    --lib-navy-light: #0f3460;
    --lib-gold: #c9a96e;
    --lib-gold-light: #e8c97a;
    --lib-cream: #faf8f3;
    --lib-text: #2c2c3e;
    --lib-muted: #6b7280;
    --lib-border: #e5e0d8;
    --lib-card-bg: #ffffff;
    --lib-success: #2d6a4f;
    --lib-danger: #c1121f;
    --shadow-sm: 0 2px 8px rgba(26,26,46,0.08);
    --shadow-md: 0 8px 24px rgba(26,26,46,0.12);
    --shadow-lg: 0 20px 60px rgba(26,26,46,0.15);
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
}

/* ── Base ───────────────────────────────────────────────────── */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    font-size: 15px;
}

@media (min-width: 768px) {
    html {
        font-size: 16px;
    }
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--lib-cream);
    color: var(--lib-text);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    margin-bottom: 0;
}

h1, h2, h3, h4, h5 {
    font-family: 'Playfair Display', Georgia, serif;
    color: var(--lib-navy);
}

.lib-main-wrapper {
    flex: 1;
}

/* ── Navbar ─────────────────────────────────────────────────── */
.lib-navbar {
    background: linear-gradient(90deg, var(--lib-navy) 0%, var(--lib-navy-mid) 100%);
    padding: 0.75rem 0;
    border-bottom: 2px solid var(--lib-gold) !important;
}

.lib-logo-icon {
    background: var(--lib-gold);
    color: var(--lib-navy);
    width: 38px;
    height: 38px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    box-shadow: 0 3px 10px rgba(201, 169, 110, 0.4);
    flex-shrink: 0;
}

.lib-brand-text {
    line-height: 1.1;
}

.lib-brand-main {
    font-family: 'Playfair Display', serif;
    font-size: 1.15rem;
    letter-spacing: 2px;
    color: #fff;
}

.lib-brand-sub {
    font-family: 'Playfair Display', serif;
    font-size: 1.15rem;
    letter-spacing: 2px;
}

.lib-nav-link {
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.5px;
    color: rgba(255,255,255,0.82) !important;
    padding: 0.55rem 0.85rem !important;
    border-radius: var(--radius-sm);
    transition: all 0.25s ease;
    position: relative;
}

    .lib-nav-link:hover {
        color: var(--lib-gold) !important;
        background: rgba(201,169,110,0.1);
    }

    .lib-nav-link::after {
        content: '';
        position: absolute;
        bottom: 4px;
        left: 50%;
        transform: translateX(-50%);
        width: 0;
        height: 2px;
        background: var(--lib-gold);
        border-radius: 2px;
        transition: width 0.3s ease;
    }

    .lib-nav-link:hover::after {
        width: 70%;
    }

.lib-dropdown {
    background: var(--lib-navy) !important;
    border: 1px solid rgba(201,169,110,0.2) !important;
    border-radius: var(--radius-md) !important;
    padding: 0.5rem;
    min-width: 220px;
}

.lib-drop-item {
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    padding: 0.55rem 1rem !important;
    transition: background 0.2s;
}

    .lib-drop-item:hover {
        background: rgba(201,169,110,0.15) !important;
    }

/* ── Avatar ─────────────────────────────────────────────────── */
.lib-avatar {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--lib-navy-light), var(--lib-gold));
    color: white;
    font-weight: 700;
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    border: 2px solid rgba(255,255,255,0.3);
}

.lib-avatar-admin {
    border: 2px solid var(--lib-gold) !important;
}

.lib-user-btn {
    padding: 0.4rem 0.75rem;
    border-radius: var(--radius-md);
}

    .lib-user-btn:hover {
        background: rgba(255,255,255,0.1);
    }

.lib-user-menu {
    min-width: 215px;
    background: #fff;
}

    .lib-user-menu .dropdown-item {
        font-size: 0.85rem;
        border-radius: var(--radius-sm);
    }

        .lib-user-menu .dropdown-item:hover {
            background: #f0f4ff;
        }

/* ── Toast ───────────────────────────────────────────────────── */
.lib-toast {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 9999;
    padding: 14px 20px;
    border-radius: var(--radius-md);
    color: white;
    font-size: 0.88rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    box-shadow: var(--shadow-lg);
    animation: slideInToast 0.4s ease;
    max-width: 380px;
}

.lib-toast-success {
    background: linear-gradient(135deg, #2d6a4f, #40916c);
}

.lib-toast-danger {
    background: linear-gradient(135deg, #c1121f, #e63946);
}

@keyframes slideInToast {
    from {
        transform: translateX(120px);
        opacity: 0;
    }

    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* ── Footer ─────────────────────────────────────────────────── */
.lib-footer {
    background: #fff;
}

/* ── Botones ─────────────────────────────────────────────────── */
.btn-library {
    background: linear-gradient(135deg, var(--lib-navy), var(--lib-navy-light));
    color: #fff;
    border: none;
    font-weight: 500;
    letter-spacing: 0.3px;
    transition: all 0.3s ease;
}

    .btn-library:hover {
        background: linear-gradient(135deg, var(--lib-navy-light), var(--lib-navy));
        color: #fff;
        transform: translateY(-2px);
        box-shadow: var(--shadow-md);
    }

.btn-gold {
    background: linear-gradient(135deg, var(--lib-gold), var(--lib-gold-light));
    color: var(--lib-navy);
    border: none;
    font-weight: 600;
    transition: all 0.3s ease;
}

    .btn-gold:hover {
        transform: translateY(-2px);
        box-shadow: 0 8px 20px rgba(201,169,110,0.4);
        color: var(--lib-navy);
    }

/* ── Cards ───────────────────────────────────────────────────── */
.lib-card {
    background: var(--lib-card-bg);
    border: 1px solid var(--lib-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    overflow: hidden;
}

    .lib-card:hover {
        transform: translateY(-6px);
        box-shadow: var(--shadow-lg);
    }

.lib-card-header {
    background: linear-gradient(135deg, var(--lib-navy) 0%, var(--lib-navy-mid) 100%);
    padding: 1.5rem 1.75rem;
    border-bottom: 3px solid var(--lib-gold);
}

/* ── Libro card ──────────────────────────────────────────────── */
.book-card {
    background: #fff;
    border: none;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all 0.35s cubic-bezier(.25,.8,.25,1);
    height: 100%;
}

    .book-card:hover {
        transform: translateY(-8px);
        box-shadow: var(--shadow-lg);
    }

.book-cover-container {
    position: relative;
    aspect-ratio: 3/4;
    overflow: hidden;
    background: linear-gradient(135deg, #f0ebe0, #e8e0d0);
}

.book-cover-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.book-card:hover .book-cover-img {
    transform: scale(1.07);
}

.book-cover-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    gap: 0.5rem;
    color: var(--lib-muted);
}

.book-badge-year {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(26,26,46,0.85);
    color: var(--lib-gold);
    border: 1px solid var(--lib-gold);
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    backdrop-filter: blur(4px);
}

.book-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(26,26,46,0.9) 0%, transparent 50%);
    opacity: 0;
    transition: opacity 0.35s ease;
    display: flex;
    align-items: flex-end;
    padding: 1rem;
}

.book-card:hover .book-overlay {
    opacity: 1;
}

.book-overlay-btns {
    display: flex;
    gap: 0.5rem;
    width: 100%;
}

/* ── Tabla ───────────────────────────────────────────────────── */
.lib-table th {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--lib-muted);
    padding: 14px 16px;
    background: #f8f6f1;
    border: none;
}

.lib-table td {
    padding: 14px 16px;
    border-color: #f0ece4;
    vertical-align: middle;
}

.lib-table tbody tr:hover {
    background: #faf7f0;
}

/* ── Formularios ─────────────────────────────────────────────── */
.lib-form-control {
    border: 2px solid var(--lib-border);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    padding: 0.6rem 0.9rem;
    transition: border-color 0.2s, box-shadow 0.2s;
    background: #fdfcfa;
}

    .lib-form-control:focus {
        border-color: var(--lib-gold);
        box-shadow: 0 0 0 3px rgba(201,169,110,0.15);
        outline: none;
        background: #fff;
    }

.form-control:focus {
    border-color: var(--lib-gold);
    box-shadow: 0 0 0 3px rgba(201,169,110,0.15);
}

/* ── Page Hero ───────────────────────────────────────────────── */
.lib-page-hero {
    background: linear-gradient(135deg, var(--lib-navy) 0%, var(--lib-navy-light) 100%);
    padding: 3rem 0 5rem;
    margin-bottom: -3.5rem;
    position: relative;
    overflow: hidden;
}

    .lib-page-hero::before {
        content: '';
        position: absolute;
        inset: 0;
        background-image: repeating-linear-gradient( 45deg, transparent, transparent 30px, rgba(201,169,110,0.04) 30px, rgba(201,169,110,0.04) 31px );
    }

/* ── Badge de estado ejemplar ─────────────────────────────────── */
.badge-disponible {
    background: rgba(45,106,79,0.15);
    color: var(--lib-success);
    border: 1px solid rgba(45,106,79,0.3);
}

.badge-prestado {
    background: rgba(13,110,253,0.1);
    color: #0d6efd;
    border: 1px solid rgba(13,110,253,0.3);
}

.badge-dañado {
    background: rgba(255,152,0,0.1);
    color: #e65100;
    border: 1px solid rgba(255,152,0,0.3);
}

.badge-baja {
    background: rgba(193,18,31,0.1);
    color: var(--lib-danger);
    border: 1px solid rgba(193,18,31,0.3);
}

/* ── Auth pages ──────────────────────────────────────────────── */
.lib-auth-bg {
    background: var(--lib-cream);
    min-height: 88vh;
}

.lib-auth-card {
    border: 1px solid var(--lib-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

/* ── Dropdown toggle hide arrow ─────────────────────────────── */
.dropdown-toggle::after {
    display: none;
}

.dropdown-menu {
    min-width: 200px;
}

/* ── Misc ────────────────────────────────────────────────────── */
.btn:focus, .btn:active:focus, .form-control:focus, .form-check-input:focus {
    box-shadow: 0 0 0 0.15rem rgba(201,169,110,0.3);
}

.text-gold {
    color: var(--lib-gold) !important;
}

.bg-navy {
    background-color: var(--lib-navy) !important;
}

.border-gold {
    border-color: var(--lib-gold) !important;
}

.font-serif {
    font-family: 'Playfair Display', Georgia, serif;
}

.page-link {
    color: var(--lib-navy);
}

.page-item.active .page-link {
    background: var(--lib-navy);
    border-color: var(--lib-navy);
}

.page-link:hover {
    background: #f0ebe0;
    color: var(--lib-navy);
}

/* ── Portada placeholder ─────────────────────────────────────── */
.no-cover {
    background: linear-gradient(135deg, #f0ebe0 0%, #e8ddd0 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: #b5a99a;
    height: 100%;
}

/* ── Responsive ──────────────────────────────────────────────── */
@media (max-width: 768px) {
    .lib-page-hero {
        padding: 2rem 0 4rem;
        margin-bottom: -2.5rem;
    }
}