@font-face {
  font-family: 'Vazirmatn';
  src: url('../fonts/Vazirmatn.woff2') format('woff2');
  font-display: swap;
}

:root {
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-2: #eef2ff;
  --text: #0f172a;
  --muted: #64748b;
  --primary: #1d4ed8;
  --primary-2: #0ea5e9;
  --secondary: #7c3aed;
  --success: #16a34a;
  --danger: #dc2626;
  --warning: #d97706;
  --border: #e2e8f0;
  --shadow: 0 8px 30px rgba(15, 23, 42, 0.08);
  --radius: 16px;
  --container: 1320px;
}

body {
  font-family: 'Vazirmatn', Tahoma, sans-serif;
  background: linear-gradient(180deg, #f8fafc 0%, #eef4ff 100%);
  color: var(--text);
  line-height: 1.75;
}

.container {
  width: min(100% - 32px, var(--container));
  margin-inline: auto;
}

.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background:
    linear-gradient(135deg, rgba(29, 78, 216, 0.98), rgba(14, 165, 233, 0.95) 45%, rgba(124, 58, 237, 0.95));
  backdrop-filter: blur(12px);
  color: #fff;
  box-shadow: 0 10px 25px rgba(0,0,0,0.12);
}

.header-inner {
  min-height: 82px;
  display: grid;
  grid-template-columns: 260px 1fr 240px;
  align-items: center;
  gap: 18px;
  padding: 12px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand img {
  width: 50px;
  height: 50px;
  object-fit: contain;
  border-radius: 12px;
  background: rgba(255,255,255,0.15);
  padding: 6px;
}

.brand-text h1 {
  font-size: 1.1rem;
  font-weight: 800;
}

.brand-text p {
  font-size: 0.82rem;
  opacity: 0.9;
}

.search-box {
  display: flex;
  align-items: center;
  background: rgba(255,255,255,0.14);
  border: 1px solid rgba(255,255,255,0.20);
  border-radius: 14px;
  overflow: hidden;
}

.search-box input {
  width: 100%;
  border: none;
  outline: none;
  background: transparent;
  color: #fff;
  padding: 14px 16px;
}

.search-box input::placeholder {
  color: rgba(255,255,255,0.8);
}

.search-box button {
  border: none;
  background: rgba(255,255,255,0.18);
  color: #fff;
  padding: 14px 18px;
  cursor: pointer;
}

.header-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

.btn {
  border: none;
  cursor: pointer;
  border-radius: 12px;
  padding: 11px 16px;
  font-weight: 700;
  transition: 0.25s ease;
}

.btn-primary {
  background: #fff;
  color: var(--primary);
}

.btn-primary:hover {
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.35);
  color: #fff;
}

.hero {
  padding: 30px 0 12px;
}

.hero-card {
  background: linear-gradient(135deg, #ffffff 0%, #f1f5f9 100%);
  border: 1px solid var(--border);
  border-radius: 24px;
  box-shadow: var(--shadow);
  padding: 28px;
}

.hero-card h2 {
  font-size: 1.8rem;
  font-weight: 900;
  margin-bottom: 10px;
}

.hero-card p {
  color: var(--muted);
  max-width: 800px;
}

.controls {
  padding: 18px 0 14px;
}

.controls-wrap {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
}

.category-filter {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.filter-chip {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 14px;
  border-radius: 999px;
  cursor: pointer;
  transition: 0.2s ease;
}

.filter-chip.active,
.filter-chip:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.result-meta {
  color: var(--muted);
  font-size: 0.95rem;
}

.books-section {
  padding: 18px 0 40px;
}

.books-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.book-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: 0.25s ease;
  display: flex;
  flex-direction: column;
}

.book-card:hover {
  transform: translateY(-4px);
}

.book-cover {
  aspect-ratio: 3 / 4;
  background: #f1f5f9;
  overflow: hidden;
}

.book-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.book-content {
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.book-category {
  color: var(--secondary);
  font-size: 0.85rem;
  font-weight: 700;
}

.book-title {
  font-size: 1.02rem;
  font-weight: 800;
  min-height: 58px;
}

.book-author {
  color: var(--muted);
  font-size: 0.92rem;
}

.book-price {
  color: var(--success);
  font-size: 1.02rem;
  font-weight: 900;
}

.book-actions {
  margin-top: auto;
  display: flex;
  gap: 10px;
}

.book-actions .btn {
  flex: 1;
}

.btn-request {
  background: var(--primary);
  color: #fff;
}

.btn-details {
  background: #eef2ff;
  color: var(--primary);
}

.pagination {
  margin-top: 24px;
  display: flex;
  gap: 8px;
  justify-content: center;
  flex-wrap: wrap;
}

.page-btn {
  min-width: 42px;
  height: 42px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #fff;
  cursor: pointer;
  font-weight: 700;
}

.page-btn.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.footer {
  margin-top: 30px;
  background: #0f172a;
  color: #e2e8f0;
  padding: 26px 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 20px;
}

.footer h3 {
  margin-bottom: 10px;
  font-size: 1.05rem;
}

.footer p,
.footer li,
.footer a {
  color: #cbd5e1;
  font-size: 0.95rem;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.55);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1500;
  padding: 20px;
}

.modal-backdrop.active {
  display: flex;
}

.modal {
  width: min(100%, 680px);
  background: #fff;
  border-radius: 22px;
  padding: 22px;
  box-shadow: 0 25px 80px rgba(0,0,0,0.25);
  max-height: 92vh;
  overflow-y: auto;
}

.modal h3 {
  margin-bottom: 12px;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group.full {
  grid-column: 1 / -1;
}

.form-group label {
  font-weight: 700;
  font-size: 0.95rem;
}

.form-group input,
.form-group textarea,
.form-group select {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 14px;
  outline: none;
  background: #fff;
}

.form-group textarea {
  min-height: 110px;
  resize: vertical;
}

.notice {
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  color: #1e3a8a;
  border-radius: 14px;
  padding: 12px 14px;
  font-size: 0.95rem;
}

.loading,
.empty-state {
  text-align: center;
  padding: 40px 0;
  color: var(--muted);
}