/* ============================================================
   БУККРОСИНГ — ЕДИНАЯ ТЕМА v4
   Палитра: тёмно-синий (#1e3a5f) + золото (#e8a838)
   Шрифт: Manrope
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600;700;800&display=swap');

/* ============================================================
   1. ПЕРЕМЕННЫЕ — СВЕТЛАЯ ТЕМА
   ============================================================ */
:root {
    --primary:        #1e3a5f;
    --primary-dark:   #152a45;
    --primary-mid:    #2d5a87;
    --primary-light:  #3d6a9e;

    --accent:         #e8a838;
    --accent-dark:    #c48a1f;
    --accent-light:   #f0c060;

    --secondary:      #2d8f6f;
    --secondary-dark: #1e6b52;

    --success:        #2d8f6f;
    --success-dark:   #1e6b52;
    --warning:        #d97706;
    --warning-dark:   #b45309;
    --danger:         #dc2626;
    --danger-dark:    #b91c1c;

    --gold:   #e8a838;
    --silver: #c0c0c0;
    --bronze: #cd7f32;

    --dark:      #0f172a;
    --light:     #f8fafc;
    --gray-50:   #f9fafb;
    --gray-100:  #f3f4f6;
    --gray-200:  #e5e7eb;
    --gray-300:  #d1d5db;
    --gray-400:  #9ca3af;
    --gray-500:  #6b7280;
    --gray-600:  #4b5563;
    --gray-700:  #374151;
    --gray-800:  #1f2937;
    --gray-900:  #111827;

    --bg-primary:     #1e3a5f;
    --bg-secondary:   #2d5a87;
    --card-bg:        #ffffff;
    --card-bg-solid:  #ffffff;
    --text-primary:   #1e293b;
    --text-secondary: #64748b;
    --border-light:   rgba(30, 58, 95, 0.10);
    --border-medium:  rgba(30, 58, 95, 0.18);

    --gradient-primary: linear-gradient(135deg, #1e3a5f 0%, #2d5a87 55%, #e8a838 100%);
    --gradient-blue:    linear-gradient(135deg, #1e3a5f 0%, #2d5a87 100%);
    --gradient-accent:  linear-gradient(135deg, #e8a838 0%, #f0c060 100%);
    --gradient-success: linear-gradient(135deg, #2d8f6f 0%, #4caf8a 100%);
    --gradient-dark:    linear-gradient(135deg, #0f172a 0%, #1e293b 100%);

    --shadow-sm:  0 1px 2px rgba(30, 58, 95, 0.06);
    --shadow-md:  0 4px 8px -2px rgba(30, 58, 95, 0.10), 0 2px 4px -2px rgba(30, 58, 95, 0.06);
    --shadow-lg:  0 10px 20px -6px rgba(30, 58, 95, 0.15), 0 4px 8px -4px rgba(30, 58, 95, 0.08);
    --shadow-xl:  0 20px 30px -8px rgba(30, 58, 95, 0.18), 0 8px 12px -6px rgba(30, 58, 95, 0.10);
    --shadow-2xl: 0 25px 50px -12px rgba(30, 58, 95, 0.25);

    --radius-sm:  0.375rem;
    --radius-md:  0.5rem;
    --radius-lg:  0.75rem;
    --radius-xl:  1rem;
    --radius-2xl: 1.5rem;

    --transition-fast:   0.15s ease;
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow:   0.5s cubic-bezier(0.4, 0, 0.2, 1);

    --focus-ring: 0 0 0 4px rgba(232, 168, 56, 0.28);
}

/* ============================================================
   2. ПЕРЕМЕННЫЕ — ТЁМНАЯ ТЕМА
   ============================================================ */
[data-theme="dark"] {
    --primary:       #3d6a9e;
    --primary-dark:  #2d5a87;
    --primary-mid:   #2d5a87;
    --primary-light: #5b8ac4;

    --accent:        #f0c060;
    --accent-dark:   #e8a838;
    --accent-light:  #ffd580;

    --success:       #4caf8a;
    --success-dark:  #2d8f6f;
    --warning:       #f59e0b;
    --warning-dark:  #d97706;
    --danger:        #f87171;
    --danger-dark:   #dc2626;

    --bg-primary:     #0f172a;
    --bg-secondary:   #1e293b;
    --card-bg:        rgba(30, 41, 59, 0.96);
    --card-bg-solid:  #1e293b;
    --text-primary:   #f1f5f9;
    --text-secondary: #94a3b8;
    --border-light:   rgba(148, 163, 184, 0.15);
    --border-medium:  rgba(148, 163, 184, 0.28);

    --gray-50:  #0f172a;
    --gray-100: #1e293b;
    --gray-200: #334155;
    --gray-300: #475569;
    --gray-400: #64748b;
    --gray-500: #94a3b8;
    --gray-600: #cbd5e1;
    --gray-700: #e2e8f0;
    --gray-800: #f1f5f9;
    --gray-900: #f8fafc;

    --shadow-sm:  0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md:  0 4px 8px -2px rgba(0, 0, 0, 0.5);
    --shadow-lg:  0 10px 20px -6px rgba(0, 0, 0, 0.5);
    --shadow-xl:  0 20px 30px -8px rgba(0, 0, 0, 0.6);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.7);

    --focus-ring: 0 0 0 4px rgba(240, 192, 96, 0.3);
}

/* ============================================================
   3. СБРОС И БАЗА
   ============================================================ */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Manrope', 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: linear-gradient(160deg, var(--bg-primary) 0%, var(--bg-secondary) 50%, #1a4d6e 100%);
    background-attachment: fixed;
    min-height: 100vh;
    color: var(--text-primary);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background var(--transition-normal), color var(--transition-normal);
}

img { max-width: 100%; display: block; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
a { color: var(--accent); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--accent-dark); }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
.hidden { display: none !important; }

/* ============================================================
   4. АНИМАЦИЯ ПОЯВЛЕНИЯ СТРАНИЦ (новое)
   ============================================================ */
@keyframes pageFade {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}

#content > * {
    animation: pageFade 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

@media (prefers-reduced-motion: reduce) {
    #content > * { animation: none; }
}

/* ============================================================
   5. КОНТЕЙНЕР
   ============================================================ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* ============================================================
   6. ШАПКА САЙТА
   ============================================================ */
.header {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 40px 30px;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    margin-bottom: 30px;
    text-align: center;
    border: 1px solid var(--border-light);
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 5px;
    background: var(--gradient-primary);
}

.school-name {
    font-size: 3.2em;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 12px;
    letter-spacing: -0.025em;
    line-height: 1.1;
}

.library-subtitle {
    font-size: 1.2em;
    color: var(--text-secondary);
    font-weight: 500;
}

.header-compact { padding: 28px 24px; }
.header-compact .school-name { font-size: 2rem; }
.header-compact .library-subtitle { font-size: 1.05rem; }

/* ============================================================
   7. ПЕРЕКЛЮЧАТЕЛЬ ТЕМЫ
   ============================================================ */
.theme-toggle {
    position: fixed;
    top: auto;
    bottom: 24px;
    right: 24px;
    background: var(--card-bg);
    border: 2px solid var(--border-light);
    border-radius: 50%;
    width: 56px;
    height: 56px;
    cursor: pointer;
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3em;
    z-index: 1000;
    transition: all var(--transition-normal);
    color: var(--primary);
}

.theme-toggle:hover {
    transform: scale(1.08) rotate(15deg);
    box-shadow: var(--shadow-2xl);
    border-color: var(--accent);
    color: var(--accent);
}

/* ============================================================
   8. ВЕРХНЯЯ НАВИГАЦИЯ
   ============================================================ */
.top-nav {
    position: sticky;
    top: 12px;
    z-index: 900;
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    margin-bottom: 24px;
    border: 1px solid var(--border-light);
    padding: 10px 16px;
}

.top-nav.hidden { display: none; }

.top-nav-inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    max-width: 1200px;
    margin: 0 auto;
}

.top-nav-brand {
    font-weight: 800;
    font-size: 1rem;
    color: var(--primary);
    margin-right: auto;
    display: flex;
    align-items: center;
    gap: 8px;
}

.top-nav-brand i { color: var(--accent); }

.top-nav-link {
    padding: 8px 14px;
    border-radius: var(--radius-lg);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    border: none;
    background: transparent;
    transition: all var(--transition-fast);
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.top-nav-link i { font-size: 0.95em; }

.top-nav-link:hover {
    background: var(--gray-100);
    color: var(--primary);
}

.top-nav-link.active {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: var(--shadow-md);
}

.top-nav-user {
    font-size: 0.85rem;
    color: var(--text-secondary);
    padding: 0 8px;
    max-width: 140px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-weight: 600;
}

/* ============================================================
   9. УВЕДОМЛЕНИЯ
   ============================================================ */
.notification-container {
    position: fixed;
    top: 24px;
    right: 24px;
    z-index: 10000;
    max-width: 420px;
    width: calc(100% - 48px);
    pointer-events: none;
}

.notification {
    background: var(--card-bg-solid);
    border-radius: var(--radius-xl);
    padding: 18px 22px;
    margin-bottom: 14px;
    box-shadow: var(--shadow-2xl);
    border-left: 6px solid var(--primary);
    border-top: 1px solid var(--border-light);
    border-right: 1px solid var(--border-light);
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    gap: 14px;
    animation: slideIn 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    transition: all var(--transition-normal);
    pointer-events: auto;
    font-weight: 500;
    color: var(--text-primary);
}

.notification.success { border-left-color: var(--success); }
.notification.warning { border-left-color: var(--warning); }
.notification.error   { border-left-color: var(--danger); }

.notification i { font-size: 1.2em; flex-shrink: 0; }
.notification.success i { color: var(--success); }
.notification.warning i { color: var(--warning); }
.notification.error   i { color: var(--danger); }
.notification.info i  { color: var(--primary); }

.notification.hiding { transform: translateX(110%); opacity: 0; }

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to   { transform: translateX(0);    opacity: 1; }
}

/* ============================================================
   10. ГОСТЕВАЯ СТРАНИЦА / HERO
   ============================================================ */
.guest-hero {
    background: var(--card-bg);
    border-radius: var(--radius-2xl);
    padding: 48px 32px;
    text-align: center;
    margin-bottom: 32px;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-light);
    position: relative;
    overflow: hidden;
}

.guest-hero::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 5px;
    background: var(--gradient-primary);
}

.guest-hero h1 {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 12px;
    letter-spacing: -0.02em;
}

.hero-v2 {
    padding: 64px 32px 56px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(232, 168, 56, 0.14);
    color: var(--accent-dark);
    border: 1px solid rgba(232, 168, 56, 0.35);
    border-radius: 999px;
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    margin-bottom: 24px;
    position: relative;
    z-index: 1;
}

[data-theme="dark"] .hero-badge { color: var(--accent); }

.hero-title {
    font-size: clamp(1.8rem, 4.5vw, 2.8rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.025em;
    color: var(--text-primary);
    margin-bottom: 16px;
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
    position: relative;
    z-index: 1;
}

.hero-accent {
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.hero-subtitle {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 560px;
    margin: 0 auto 40px;
    line-height: 1.65;
    position: relative;
    z-index: 1;
}

.guest-steps-v2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 18px;
    margin: 40px 0;
    text-align: left;
    position: relative;
    z-index: 1;
}

.guest-steps-v2 .guest-step {
    position: relative;
    padding: 28px 22px 24px;
    background: var(--gray-50);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-light);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
    overflow: hidden;
}

.guest-steps-v2 .guest-step::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%;
    height: 3px;
    background: var(--gradient-accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-normal);
}

.guest-steps-v2 .guest-step:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent);
}

.guest-steps-v2 .guest-step:hover::before { transform: scaleX(1); }

.guest-step-icon {
    font-size: 1.9rem;
    line-height: 1;
    margin-bottom: 14px;
    display: block;
}

.guest-steps-v2 .guest-step-num {
    position: absolute;
    top: 18px; right: 20px;
    font-size: 0.85rem;
    font-weight: 800;
    color: var(--accent);
    letter-spacing: 0.08em;
    opacity: 0.6;
}

.guest-steps-v2 .guest-step strong {
    display: block;
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.guest-steps-v2 .guest-step p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.55;
    margin: 0;
}

.auth-buttons-v2 {
    gap: 14px;
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
}

.auth-buttons-v2 .auth-btn {
    padding: 18px 32px;
    font-size: 1.05em;
    min-width: 230px;
}

.hero-note {
    color: var(--text-secondary);
    font-size: 0.85rem;
    opacity: 0.85;
    margin-top: 8px;
    position: relative;
    z-index: 1;
}

.hero-note i { color: var(--accent); margin-right: 4px; }

.hero-decor {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
    z-index: 0;
}

.hero-float {
    position: absolute;
    font-size: 2.2rem;
    opacity: 0.13;
    animation: heroFloat 8s ease-in-out infinite;
    user-select: none;
    filter: blur(0.5px);
}

.hero-float-1 { top: 8%;  left: 6%;   animation-delay: 0s;    font-size: 2.8rem; }
.hero-float-2 { top: 70%; left: 4%;   animation-delay: 1.6s;  font-size: 2rem; }
.hero-float-3 { top: 20%; right: 7%;  animation-delay: 0.8s;  font-size: 1.8rem; }
.hero-float-4 { top: 76%; right: 9%;  animation-delay: 2.4s;  font-size: 2.4rem; }

@keyframes heroFloat {
    0%, 100% { transform: translateY(0)    rotate(-4deg); }
    50%      { transform: translateY(-18px) rotate(4deg);  }
}

.hero-v2 > *:not(.hero-decor) {
    position: relative;
    z-index: 1;
}

/* ============================================================
   11. КНОПКИ ГОСТЕВОЙ
   ============================================================ */
.auth-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.auth-btn {
    padding: 20px 40px;
    font-size: 1.15em;
    border: none;
    border-radius: var(--radius-xl);
    cursor: pointer;
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    gap: 12px;
    min-width: 220px;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.auth-btn::before {
    content: '';
    position: absolute;
    top: 0; left: -100%;
    width: 100%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
    transition: left 0.6s;
}

.auth-btn:hover::before { left: 100%; }

.auth-btn-primary {
    background: var(--gradient-accent);
    color: var(--primary-dark);
    box-shadow: 0 12px 30px rgba(232, 168, 56, 0.4);
}

.auth-btn-secondary {
    background: var(--card-bg-solid);
    color: var(--primary);
    border: 2px solid var(--primary);
    box-shadow: 0 4px 14px rgba(30, 58, 95, 0.12);
}

[data-theme="dark"] .auth-btn-secondary {
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
    border-color: rgba(255, 255, 255, 0.35);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    box-shadow: none;
}

.auth-btn:hover { transform: translateY(-6px); }

.auth-btn-primary:hover { box-shadow: 0 20px 40px rgba(232, 168, 56, 0.55); }

.auth-btn-secondary:hover {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 12px 30px rgba(30, 58, 95, 0.35);
}

[data-theme="dark"] .auth-btn-secondary:hover {
    background: rgba(255, 255, 255, 0.28);
    color: #fff;
    box-shadow: 0 20px 40px rgba(255, 255, 255, 0.2);
}

/* ============================================================
   12. ГЛАВНОЕ МЕНЮ (ПЛИТКИ)
   ============================================================ */
.main-nav {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 16px;
    margin-bottom: 40px;
}

.nav-section-title {
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.09em;
    color: var(--text-secondary);
    margin: 24px 0 12px 4px;
    grid-column: 1 / -1;
}

.nav-card {
    background: var(--card-bg);
    padding: 24px;
    border-radius: var(--radius-xl);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.nav-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-normal);
}

.nav-card:hover::before { transform: scaleX(1); }

.nav-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
    border-color: var(--accent);
}

.nav-icon {
    font-size: 2.8em;
    margin-bottom: 14px;
    color: var(--primary);
    transition: transform var(--transition-normal);
    display: inline-block;
    line-height: 1;
}

.nav-card:hover .nav-icon { transform: scale(1.12); }

.nav-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.nav-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
}

/* ============================================================
   13. СТАТИСТИКА
   ============================================================ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.stat-card {
    background: var(--card-bg);
    padding: 26px 22px;
    border-radius: var(--radius-xl);
    text-align: center;
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    background: var(--gradient-primary);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.stat-number {
    font-size: 2.6em;
    font-weight: 800;
    margin-bottom: 6px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.92em;
    font-weight: 600;
}

/* ============================================================
   14. КАТАЛОГ КНИГ
   ============================================================ */
.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
    margin-bottom: 40px;
    width: 100%;
}

#booksListContainer,
#myBooksContainer,
#adminBooksContainer {
    width: 100%;
}

.book-card {
    background: var(--card-bg);
    padding: 24px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    border: 1px solid var(--border-light);
    border-left: 5px solid var(--primary);
    position: relative;
    overflow: hidden;
    min-width: 0;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.book-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
    border-left-color: var(--accent);
}

.book-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
}

.book-title {
    font-size: 1.15em;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 4px;
    line-height: 1.3;
    word-break: break-word;
}

.book-author {
    color: var(--text-secondary);
    font-size: 0.95em;
    font-weight: 500;
}

.book-stats {
    display: flex;
    gap: 16px;
    margin-top: auto;
    padding-top: 16px;
    border-top: 1px solid var(--border-light);
    position: relative;
    z-index: 1;
}

.book-stat { text-align: center; flex: 1; }

.book-stat-number {
    font-size: 1.25em;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 2px;
    line-height: 1.1;
}

.book-stat-label {
    font-size: 0.78em;
    color: var(--text-secondary);
    font-weight: 600;
}

.book-card-v2 {
    display: flex;
    flex-direction: column;
    background: var(--card-bg);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-light);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
    cursor: pointer;
    min-width: 0;
    height: 100%;
    position: relative;
}

.book-card-v2:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
}

.book-card-v2.status-available { border-top: 4px solid var(--success); }
.book-card-v2.status-taken { border-top: 4px solid var(--warning); }

.book-cover-wrap {
    height: 190px;
    background: var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

.book-card-body {
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.book-card-body .book-title {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 4px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.book-desc-clamp {
    color: var(--text-secondary);
    font-size: 0.88rem;
    margin: 10px 0;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex: 1;
    line-height: 1.5;
}

.book-card-actions {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 12px;
}

.book-card-actions .btn {
    width: 100%;
    justify-content: center;
}

.stars-inline {
    color: var(--accent);
    font-size: 0.95rem;
    letter-spacing: 1px;
    margin: 8px 0;
}

/* ============================================================
   15. CSS-ОБЛОЖКИ КНИГ + тёмная тема
   ============================================================ */
.book-cover-css {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 18px 16px 16px 26px;
    color: #fff;
    overflow: hidden;
    text-align: left;
    transition: opacity 0.3s ease, filter 0.3s ease;
}

/* NEW: приглушаем обложки в тёмной теме */
[data-theme="dark"] .book-cover-css {
    filter: brightness(0.82) saturate(0.85);
}

.book-cover-css::before {
    content: '';
    position: absolute;
    top: 0; left: 0; bottom: 0;
    width: 7px;
    background: rgba(0, 0, 0, 0.28);
    box-shadow: inset 2px 0 6px rgba(0, 0, 0, 0.35);
    z-index: 1;
}

.book-cover-css::after {
    content: '';
    position: absolute;
    top: 12px; right: 12px;
    width: 28px;
    height: 3px;
    background: var(--accent);
    border-radius: 2px;
    opacity: 0.85;
    z-index: 1;
}

.book-cover-initial {
    font-size: 3.8rem;
    font-weight: 800;
    line-height: 0.85;
    opacity: 0.28;
    letter-spacing: -0.06em;
    font-family: 'Manrope', sans-serif;
    margin-top: -6px;
    position: relative;
    z-index: 1;
}

.book-cover-meta {
    margin-top: auto;
    position: relative;
    z-index: 1;
}

.book-cover-title-css {
    font-size: 0.95rem;
    font-weight: 700;
    line-height: 1.25;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-shadow: 0 2px 6px rgba(0, 0, 0, 0.35);
    word-break: break-word;
}

.book-cover-author-css {
    font-size: 0.72rem;
    font-weight: 500;
    opacity: 0.85;
    margin-top: 4px;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.book-cover-css .book-cover-img {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    object-fit: cover;
    opacity: 0;
    transition: opacity 0.35s ease;
    z-index: 2;
    background: var(--gray-100);
}

.book-cover-css.has-image .book-cover-img { opacity: 1; }

.book-cover-css.has-image .book-cover-initial,
.book-cover-css.has-image .book-cover-meta {
    opacity: 0;
    transition: opacity 0.2s ease;
}

.book-cover-css.has-image::before,
.book-cover-css.has-image::after { display: none; }

.book-detail-cover .book-cover-css { padding: 22px 18px 18px 30px; }
.book-detail-cover .book-cover-initial { font-size: 5rem; }
.book-detail-cover .book-cover-title-css { font-size: 1rem; -webkit-line-clamp: 4; }

/* ============================================================
   16. БЕЙДЖИ СТАТУСА
   ============================================================ */
.status-badge {
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.75em;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap;
    display: inline-block;
}

.status-available {
    background: linear-gradient(135deg, #d1fae5, #a7f3d0);
    color: #065f46;
    border: 1px solid #6ee7b7;
}

.status-taken {
    background: linear-gradient(135deg, #fef3c7, #fde68a);
    color: #92400e;
    border: 1px solid #fcd34d;
}

.status-inactive {
    background: var(--gray-100);
    color: var(--gray-500);
    border: 1px solid var(--gray-200);
}

[data-theme="dark"] .status-available {
    background: rgba(45, 143, 111, 0.2);
    color: #6ee7b7;
    border-color: rgba(110, 231, 183, 0.35);
}

[data-theme="dark"] .status-taken {
    background: rgba(217, 119, 6, 0.2);
    color: #fcd34d;
    border-color: rgba(252, 211, 77, 0.35);
}

.admin-badge {
    background: var(--gradient-accent);
    color: var(--primary-dark);
    position: absolute;
    top: 14px; right: 14px;
    padding: 5px 12px;
    border-radius: 12px;
    font-size: 0.72em;
    font-weight: 800;
    z-index: 2;
    letter-spacing: 0.04em;
    box-shadow: 0 4px 10px rgba(232, 168, 56, 0.4);
}

/* ============================================================
   17. РЕЙТИНГ (ЗВЁЗДЫ)
   ============================================================ */
.rating {
    display: flex;
    gap: 4px;
    margin: 12px 0;
    position: relative;
    z-index: 1;
}

.star {
    color: var(--gray-300);
    font-size: 1.35em;
    cursor: pointer;
    transition: all var(--transition-fast);
    user-select: none;
    line-height: 1;
}

.star:hover {
    color: var(--accent-light);
    transform: scale(1.18);
}

.star.filled {
    color: var(--accent);
    text-shadow: 0 2px 8px rgba(232, 168, 56, 0.4);
}

/* ============================================================
   18. ФОРМЫ
   ============================================================ */
.form-container {
    background: var(--card-bg);
    padding: 36px;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    margin-bottom: 40px;
    border: 1px solid var(--border-light);
    position: relative;
}

.form-container::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 5px;
    background: var(--gradient-primary);
    border-radius: var(--radius-2xl) var(--radius-2xl) 0 0;
}

.form-container h2 {
    margin-bottom: 24px;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.01em;
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.form-container h2 i { color: var(--accent); }

.form-group { margin-bottom: 22px; }

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95em;
}

input, select, textarea {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid var(--border-light);
    border-radius: var(--radius-lg);
    font-size: 16px;
    transition: all var(--transition-fast);
    background: var(--card-bg-solid);
    color: var(--text-primary);
    font-family: inherit;
    line-height: 1.5;
}

input::placeholder, textarea::placeholder { color: var(--gray-400); }

input:hover, select:hover, textarea:hover { border-color: var(--border-medium); }

input:focus, select:focus, textarea:focus {
    border-color: var(--accent);
    outline: none;
    box-shadow: var(--focus-ring);
    transform: translateY(-1px);
}

textarea { resize: vertical; min-height: 90px; }
select { cursor: pointer; }

.validation-error {
    color: var(--danger);
    font-size: 0.85em;
    margin-top: 6px;
    display: none;
    font-weight: 500;
}

.validation-error.show,
.validation-error[style*="block"] { display: block; }

.required::after { content: " *"; color: var(--danger); font-weight: 700; }

.help-text {
    color: var(--text-secondary);
    font-size: 0.85em;
    margin-top: 6px;
    font-style: italic;
    line-height: 1.5;
}

/* ============================================================
   19. КНОПКИ + спиннер внутри
   ============================================================ */
.btn {
    padding: 14px 26px;
    background: var(--gradient-primary);
    color: #fff;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    font-size: 15px;
    font-weight: 700;
    transition: all var(--transition-normal);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    position: relative;
    overflow: hidden;
    text-decoration: none;
    box-shadow: var(--shadow-sm);
    line-height: 1.4;
    letter-spacing: 0.01em;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0; left: -100%;
    width: 100%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.22), transparent);
    transition: left 0.6s;
}

.btn:hover::before { left: 100%; }

.btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn:active {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn:disabled, .btn[disabled] {
    opacity: 0.55;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

.btn:disabled::before { display: none; }

/* NEW: спиннер внутри кнопки */
.btn.loading {
    color: transparent !important;
    pointer-events: none;
}
.btn.loading::after {
    content: '';
    position: absolute;
    top: 50%; left: 50%;
    width: 18px; height: 18px;
    margin: -9px 0 0 -9px;
    border: 2.5px solid rgba(255, 255, 255, 0.4);
    border-top-color: #fff;
    border-radius: 50%;
    animation: btnSpin 0.7s linear infinite;
    z-index: 2;
}
.btn.loading::before { display: none; }
.btn.loading i { opacity: 0; }

@keyframes btnSpin { to { transform: rotate(360deg); } }

.btn-primary { background: var(--gradient-primary); }
.btn-success { background: var(--gradient-success); }
.btn-warning { background: var(--gradient-accent); color: var(--primary-dark); }
.btn-danger { background: linear-gradient(135deg, var(--danger), var(--danger-dark)); }

.btn-block { width: 100%; justify-content: center; }
.btn-sm { padding: 9px 16px; font-size: 13px; border-radius: var(--radius-md); gap: 6px; }

.coming-soon-btn {
    background: var(--gradient-accent);
    color: var(--primary-dark);
    border: none;
    padding: 10px 20px;
    border-radius: var(--radius-lg);
    cursor: not-allowed;
    font-size: 14px;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 15px;
    opacity: 0.75;
}

/* ============================================================
   20. МОДАЛЬНЫЕ ОКНА
   ============================================================ */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.72);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    padding: 20px;
    animation: fadeIn 0.25s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

.modal-content {
    background: var(--card-bg-solid);
    padding: 40px;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-2xl);
    max-width: 560px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    border: 1px solid var(--border-light);
    position: relative;
    animation: scaleIn 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    color: var(--text-primary);
    will-change: transform;
}

.modal-content::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 5px;
    background: var(--gradient-primary);
    border-radius: var(--radius-2xl) var(--radius-2xl) 0 0;
}

@keyframes scaleIn {
    from { transform: scale(0.92); opacity: 0; }
    to   { transform: scale(1);    opacity: 1; }
}

/* NEW: мобильный свайп */
@media (max-width: 640px) {
    .modal-content {
        padding: 28px 20px 32px;
        position: relative;
        transition: transform 0.15s ease-out;
    }
    .modal-content::after {
        content: '';
        position: absolute;
        top: 10px;
        left: 50%;
        transform: translateX(-50%);
        width: 40px;
        height: 4px;
        background: var(--gray-300);
        border-radius: 2px;
        opacity: 0.6;
    }
    .modal-content.dragging {
        transition: none;
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    margin-bottom: 28px;
}

.modal-header h2 {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.01em;
    color: var(--text-primary);
}

.close-btn {
    background: transparent;
    border: none;
    font-size: 1.4em;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    width: 38px;
    height: 38px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.close-btn:hover {
    color: var(--danger);
    background: rgba(220, 38, 38, 0.12);
    transform: rotate(90deg);
}

/* ============================================================
   21. ТАБЫ
   ============================================================ */
.tabs {
    display: flex;
    background: var(--gray-100);
    border-radius: var(--radius-lg);
    padding: 5px;
    margin-bottom: 28px;
    flex-wrap: wrap;
    gap: 4px;
}

.tab {
    flex: 1;
    padding: 12px 18px;
    text-align: center;
    background: none;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all var(--transition-normal);
    min-width: 120px;
    color: var(--text-secondary);
    position: relative;
    overflow: hidden;
}

.tab.active {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: var(--shadow-md);
}

.tab:hover:not(.active) {
    background: var(--gray-200);
    color: var(--text-primary);
}

/* ============================================================
   22. LOADING / SPINNER
   ============================================================ */
.loading {
    display: inline-block;
    width: 22px;
    height: 22px;
    border: 3px solid var(--gray-200);
    border-top: 3px solid var(--accent);
    border-radius: 50%;
    animation: spin 0.85s linear infinite;
    vertical-align: middle;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ============================================================
   23. ПОИСК И ФИЛЬТРЫ
   ============================================================ */
.search-panel {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 24px;
    padding: 20px;
    background: var(--gray-50);
    border-radius: var(--radius-xl);
    align-items: center;
    border: 1px solid var(--border-light);
}

.search-input,
.search-input-wrap {
    flex: 1;
    min-width: 220px;
    position: relative;
}

.search-input-wrap i {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-400);
    pointer-events: none;
    font-size: 0.95em;
}

.search-input-wrap input,
.search-input-wrap .search-input {
    width: 100%;
    padding: 12px 14px 12px 42px;
    border: 2px solid var(--border-light);
    border-radius: var(--radius-lg);
    font-size: 1rem;
    background: var(--card-bg-solid);
    color: var(--text-primary);
}

.filter-select {
    padding: 12px 16px;
    border: 2px solid var(--border-light);
    border-radius: var(--radius-lg);
    background: var(--card-bg-solid);
    color: var(--text-primary);
    font-weight: 600;
    min-width: 150px;
    cursor: pointer;
}

/* ============================================================
   24. СОРТИРОВКА
   ============================================================ */
.sort-controls {
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 24px;
    padding: 16px 20px;
    background: var(--card-bg);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
}

.sort-controls > span {
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.9rem;
    margin-right: 4px;
}

.sort-btn {
    padding: 10px 18px;
    background: var(--card-bg-solid);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.sort-btn.active {
    background: var(--gradient-primary);
    color: #fff;
    border-color: transparent;
    box-shadow: var(--shadow-md);
}

.sort-btn:hover:not(.active) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--accent);
    color: var(--primary);
}

/* ============================================================
   25. ПАГИНАЦИЯ
   ============================================================ */
.pagination {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--border-light);
}

.pagination-info {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-right: 12px;
    font-weight: 500;
}

.page-btn {
    min-width: 40px;
    height: 40px;
    padding: 0 12px;
    border: 2px solid var(--border-light);
    border-radius: var(--radius-md);
    background: var(--card-bg-solid);
    color: var(--text-primary);
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.page-btn:hover:not(:disabled):not(.active) {
    border-color: var(--accent);
    color: var(--primary);
    transform: translateY(-2px);
}

.page-btn.active {
    background: var(--gradient-primary);
    border-color: transparent;
    color: #fff;
    box-shadow: var(--shadow-md);
}

.page-btn:disabled { opacity: 0.35; cursor: not-allowed; }

/* ============================================================
   26. СКЕЛЕТОН-ЛОАДЕР
   ============================================================ */
.skeleton-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.skeleton-card {
    height: 380px;
    border-radius: var(--radius-xl);
    background: linear-gradient(90deg, var(--gray-100) 25%, var(--gray-200) 50%, var(--gray-100) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.3s infinite;
}

@keyframes shimmer {
    0%   { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ============================================================
   27. ДЕТАЛИ КНИГИ
   ============================================================ */
.book-detail-modal .modal-content { max-width: 640px; }

.book-detail-header {
    display: flex;
    gap: 24px;
    margin-bottom: 24px;
}

.book-detail-cover {
    width: 150px;
    height: 210px;
    flex-shrink: 0;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    box-shadow: var(--shadow-md);
    position: relative;
}

/* NEW: кнопка "поделиться" рядом с названием */
.share-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 14px;
    background: var(--gray-100);
    color: var(--text-secondary);
    border: 1.5px solid var(--border-light);
    border-radius: var(--radius-lg);
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    transition: all var(--transition-fast);
    margin-left: auto;
    flex-shrink: 0;
}
.share-btn:hover {
    background: var(--accent);
    color: var(--primary-dark);
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}
.share-btn.copied {
    background: var(--success);
    color: #fff;
    border-color: var(--success);
}

.book-title-row {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}
.book-title-row h2 {
    margin-bottom: 0;
    flex: 1;
    min-width: 0;
}

/* ============================================================
   28. ЛИДЕРБОРД
   ============================================================ */
.leaderboard-list { list-style: none; padding: 0; margin: 0; }

.leaderboard-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    border-bottom: 1px solid var(--border-light);
    flex-wrap: wrap;
    transition: background var(--transition-fast);
    border-radius: var(--radius-md);
}

.leaderboard-item:hover { background: var(--gray-50); }

.leaderboard-rank {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    flex-shrink: 0;
    font-size: 0.95em;
}

.leaderboard-rank.medal {
    background: transparent;
    width: auto;
    height: auto;
    font-size: 1.5em;
}

.leaderboard-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    font-size: 0.82em;
    font-weight: 600;
    color: var(--text-secondary);
}

.leaderboard-stats span {
    background: var(--gray-100);
    padding: 4px 10px;
    border-radius: 20px;
}

.leaderboard-score {
    font-size: 1.3em;
    font-weight: 800;
    color: var(--primary);
    min-width: 52px;
    text-align: center;
}

.leaderboard-me {
    background: rgba(232, 168, 56, 0.10);
    border: 2px solid var(--accent);
    border-radius: var(--radius-md);
}

/* ============================================================
   29. ПИКЕР КНИГИ
   ============================================================ */
.book-picker-list {
    max-height: 360px;
    overflow-y: auto;
    margin: 16px 0;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
}

.book-picker-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    cursor: pointer;
    border-left: 3px solid transparent;
    transition: all var(--transition-fast);
    border-bottom: 1px solid var(--border-light);
}

.book-picker-item:last-child { border-bottom: none; }

.book-picker-item:hover {
    background: var(--gray-50);
    border-left-color: var(--accent);
}

.book-picker-item.selected {
    background: rgba(232, 168, 56, 0.12);
    border-left-color: var(--accent);
    font-weight: 600;
}

/* ============================================================
   30. ЛОКАЦИИ / КОЛЛЕКЦИИ / ДОСТИЖЕНИЯ
   ============================================================ */
.locations-list { margin-top: 20px; }

.location-item,
.location-card {
    background: var(--card-bg);
    padding: 18px 22px;
    border-radius: var(--radius-xl);
    margin-bottom: 12px;
    border-left: 4px solid var(--primary);
    border-top: 1px solid var(--border-light);
    border-right: 1px solid var(--border-light);
    border-bottom: 1px solid var(--border-light);
    transition: all var(--transition-fast);
}

.location-item:hover,
.location-card:hover {
    border-left-color: var(--accent);
    box-shadow: var(--shadow-md);
}

.collections-grid,
.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 16px;
}

.collection-card,
.achievement-card {
    background: var(--card-bg);
    padding: 22px;
    border-radius: var(--radius-xl);
    border-left: 4px solid var(--primary);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.collection-card:hover,
.achievement-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.achievement-card.locked {
    opacity: 0.6;
    border-left-color: var(--gray-400);
}

.achievement-card.earned { border-left-color: var(--accent); }

/* ============================================================
   31. NEW: УНИВЕРСАЛЬНЫЕ EMPTY STATE
   ============================================================ */
.empty-state {
    text-align: center;
    padding: 60px 24px;
    color: var(--text-secondary);
    max-width: 480px;
    margin: 0 auto;
}
.empty-state-icon {
    font-size: 4rem;
    line-height: 1;
    margin-bottom: 20px;
    opacity: 0.7;
    animation: emptyFloat 3.5s ease-in-out infinite;
    display: inline-block;
}
@keyframes emptyFloat {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(-8px); }
}
.empty-state h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}
.empty-state p {
    font-size: 0.95rem;
    line-height: 1.55;
    margin-bottom: 20px;
    color: var(--text-secondary);
}
.empty-state .btn {
    margin: 0 auto;
    display: inline-flex;
}

/* ============================================================
   32. АНИМАЦИИ (stagger + fade-up + theme-switching)
   ============================================================ */
@keyframes cardFadeUp {
    from { opacity: 0; transform: translateY(22px); }
    to   { opacity: 1; transform: translateY(0); }
}

.books-grid > * {
    animation: cardFadeUp 0.45s cubic-bezier(0.4, 0, 0.2, 1) backwards;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(12px); }
    to   { opacity: 1; transform: translateY(0); }
}

.form-container,
.guest-hero,
.stats-grid {
    animation: fadeInUp 0.4s cubic-bezier(0.4, 0, 0.2, 1) backwards;
}

html.theme-switching * { transition: none !important; }

/* ============================================================
   33. СКРОЛЛБАР
   ============================================================ */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }

::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: 10px;
    border: 2px solid transparent;
    background-clip: padding-box;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
    background-clip: padding-box;
}

/* ============================================================
   34. АДАПТИВ
   ============================================================ */
@media (max-width: 768px) {
    .container { padding: 14px; }
    .school-name { font-size: 2.2em; }
    .header { padding: 28px 20px; }
    .header-compact .school-name { font-size: 1.7rem; }
    .auth-buttons { flex-direction: column; align-items: center; }
    .auth-btn { width: 100%; max-width: 320px; }
    .main-nav { grid-template-columns: 1fr; }
    .books-grid { grid-template-columns: 1fr; }
    .search-panel { flex-direction: column; align-items: stretch; }
    .sort-controls { flex-direction: column; align-items: stretch; }
    .sort-btn { justify-content: center; }
    .theme-toggle { bottom: 16px; right: 16px; width: 50px; height: 50px; font-size: 1.15em; }
    .notification-container { top: 12px; right: 12px; width: calc(100% - 24px); }
    .form-container { padding: 24px 20px; }
    .modal-content { padding: 28px 22px; }
    .book-detail-header { flex-direction: column; align-items: center; text-align: center; }
    .book-detail-cover { width: 130px; height: 185px; }
    .top-nav-inner { justify-content: center; }
    .top-nav-brand { width: 100%; justify-content: center; margin-bottom: 4px; margin-right: 0; }
    .leaderboard-item { flex-direction: column; align-items: flex-start; }
    .leaderboard-stats { width: 100%; }
    .leaderboard-score { align-self: flex-end; }
    .book-title-row { flex-direction: column; align-items: flex-start; }
    .share-btn { margin-left: 0; }
}

@media (max-width: 640px) {
    .hero-v2 { padding: 44px 20px 40px; }
    .guest-steps-v2 { grid-template-columns: 1fr; }
    .hero-float { opacity: 0.09; }
    .auth-buttons-v2 .auth-btn { width: 100%; min-width: 0; }
}

@media (max-width: 480px) {
    .container { padding: 10px; }
    .header { padding: 22px 16px; }
    .school-name { font-size: 1.75em; }
    .guest-hero { padding: 32px 20px; }
    .guest-hero h1 { font-size: 1.6rem; }
    .stat-number { font-size: 2.2em; }
    .tab { min-width: 100px; padding: 10px 12px; font-size: 0.85rem; }
}

/* ============================================================
   35. СНИЖЕННАЯ АНИМАЦИЯ
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    .books-grid > *, .form-container, .guest-hero, .stats-grid { animation: none !important; }
}