@import url('https://fonts.googleapis.com/css2?family=Vazirmatn:wght@300;400;500;700;900&display=swap');

:root {
  --bg: #0d0f14;
  --surface: #161a23;
  --surface2: #1e2430;
  --border: #2a3040;
  --accent: #6c63ff;
  --accent2: #ff6584;
  --gold: #f5c842;
  --text: #e8eaf0;
  --text2: #8b92a5;
  --green: #4ade80;
  --red: #f87171;
  --radius: 16px;
}

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

body {
  font-family: 'Vazirmatn', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  direction: rtl;
}

/* هدر */
.header {
  background: linear-gradient(135deg, #1a1040 0%, #0d1a2e 50%, #1a0d2e 100%);
  padding: 48px 24px 40px;
  text-align: center;
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.header::before {
  content: '';
  position: absolute;
  top: -80px; left: 50%;
  transform: translateX(-50%);
  width: 500px; height: 300px;
  background: radial-gradient(ellipse, rgba(108,99,255,0.25) 0%, transparent 70%);
  pointer-events: none;
}

.logo {
  font-size: 2.8rem;
  font-weight: 900;
  background: linear-gradient(135deg, #a78bfa, #6c63ff, #ff6584);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -1px;
  margin-bottom: 10px;
}

.tagline {
  color: var(--text2);
  font-size: 1rem;
  font-weight: 400;
}

/* جستجو */
.search-section {
  max-width: 720px;
  margin: -24px auto 0;
  padding: 0 16px 32px;
  position: relative;
  z-index: 10;
}

.search-box {
  display: flex;
  gap: 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
}

.search-box input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text);
  font-family: 'Vazirmatn', sans-serif;
  font-size: 1rem;
  padding: 8px 12px;
  direction: rtl;
}

.search-box input::placeholder { color: var(--text2); }

.search-box button {
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 10px;
  padding: 10px 24px;
  font-family: 'Vazirmatn', sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

.search-box button:hover { background: #7c75ff; transform: translateY(-1px); }

.filters {
  display: flex;
  gap: 10px;
  margin-top: 12px;
}

.filters select {
  flex: 1;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-family: 'Vazirmatn', sans-serif;
  font-size: 0.9rem;
  padding: 10px 14px;
  outline: none;
  cursor: pointer;
  direction: rtl;
}

/* گرید اساتید */
.professors-section {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 16px 100px;
}

.professors-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

/* کارت استاد */
.prof-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  cursor: pointer;
  transition: all 0.25s;
  position: relative;
  overflow: hidden;
}

.prof-card::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 4px; height: 100%;
  background: var(--accent);
  opacity: 0;
  transition: opacity 0.25s;
}

.prof-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(108,99,255,0.15);
}

.prof-card:hover::before { opacity: 1; }

.prof-avatar {
  width: 52px; height: 52px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem;
  font-weight: 700;
  color: white;
  margin-bottom: 14px;
}

.prof-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
}

.prof-meta {
  font-size: 0.82rem;
  color: var(--text2);
  margin-bottom: 14px;
}

.prof-score {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}

.score-badge {
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--gold);
}

.score-stars { color: var(--gold); font-size: 0.9rem; letter-spacing: 1px; }

.review-count {
  font-size: 0.8rem;
  color: var(--text2);
  margin-right: auto;
}

.prof-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 14px;
}

.prof-tag {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 3px 10px;
  font-size: 0.75rem;
  color: var(--text2);
}

.btn-review {
  width: 100%;
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
  border-radius: 10px;
  padding: 9px;
  font-family: 'Vazirmatn', sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-review:hover {
  background: var(--accent);
  color: white;
}

/* امتی استیت */
.empty-state {
  text-align: center;
  padding: 80px 20px;
  color: var(--text2);
}

.empty-icon { font-size: 3rem; display: block; margin-bottom: 16px; }
.empty-state a { color: var(--accent); text-decoration: none; }

/* مودال */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(4px);
  z-index: 100;
  display: none;
}

.modal {
  position: fixed;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  z-index: 101;
  width: 95%;
  max-width: 520px;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-content {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 28px 24px;
  position: relative;
}

.modal-close {
  position: absolute;
  top: 16px; left: 16px;
  background: var(--surface2);
  border: none;
  color: var(--text2);
  width: 32px; height: 32px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 0.9rem;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.2s;
}

.modal-close:hover { background: var(--red); color: white; }

.modal-content h2 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 4px;
  padding-left: 40px;
}

.modal-prof-info {
  color: var(--text2);
  font-size: 0.85rem;
  margin-bottom: 24px;
}

/* ستاره‌ها */
.rating-group {
  margin-bottom: 20px;
}

.rating-group label {
  display: block;
  font-size: 0.9rem;
  color: var(--text2);
  margin-bottom: 8px;
  font-weight: 500;
}

.stars {
  display: flex;
  gap: 6px;
  flex-direction: row-reverse;
  justify-content: flex-end;
}

.star {
  font-size: 1.8rem;
  cursor: pointer;
  color: var(--border);
  transition: color 0.15s, transform 0.15s;
  user-select: none;
}

.star:hover, .star.active { color: var(--gold); transform: scale(1.1); }

/* تگ‌ها */
.tags-group { margin-bottom: 20px; }
.tags-group label {
  display: block;
  font-size: 0.9rem;
  color: var(--text2);
  margin-bottom: 10px;
  font-weight: 500;
}

.tags { display: flex; flex-wrap: wrap; gap: 8px; }

.tag {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 6px 14px;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s;
  color: var(--text2);
  font-family: 'Vazirmatn', sans-serif;
}

.tag.selected {
  background: rgba(108,99,255,0.2);
  border-color: var(--accent);
  color: var(--accent);
}

/* فرم */
.form-group { margin-bottom: 18px; }

.form-group label {
  display: block;
  font-size: 0.9rem;
  color: var(--text2);
  margin-bottom: 8px;
  font-weight: 500;
}

.form-group input,
.form-group textarea {
  width: 100%;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-family: 'Vazirmatn', sans-serif;
  font-size: 0.95rem;
  padding: 12px 14px;
  outline: none;
  transition: border-color 0.2s;
  direction: rtl;
  resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus { border-color: var(--accent); }

.btn-submit {
  width: 100%;
  background: linear-gradient(135deg, var(--accent), #8b7cf8);
  color: white;
  border: none;
  border-radius: 12px;
  padding: 14px;
  font-family: 'Vazirmatn', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
  margin-bottom: 10px;
}

.btn-submit:hover { opacity: 0.9; transform: translateY(-1px); }

.privacy-note {
  text-align: center;
  font-size: 0.8rem;
  color: var(--text2);
}

/* دکمه شناور */
.fab {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: white;
  border: none;
  border-radius: 50px;
  padding: 14px 28px;
  font-family: 'Vazirmatn', sans-serif;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 8px 24px rgba(108,99,255,0.4);
  transition: all 0.2s;
  z-index: 50;
  white-space: nowrap;
}

.fab:hover { transform: translateX(-50%) translateY(-2px); box-shadow: 0 12px 32px rgba(108,99,255,0.5); }

/* ریسپانسیو */
@media (max-width: 768px) {
  .logo { font-size: 2rem; }
  .filters { flex-direction: column; }
  .professors-grid { grid-template-columns: 1fr; }
  .search-box button { padding: 10px 16px; font-size: 0.88rem; }
  .modal { max-width: 100%; }
}

@media (max-width: 480px) {
  .logo { font-size: 1.8rem; }
  .header { padding: 32px 16px 28px; }
  .fab { padding: 12px 20px; font-size: 0.88rem; }
}