:root {
  --bg: #d9b8a0;
  --card-bg: #f5ede3;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --success: #22c55e;
  --text: #1f2937;
  --text-light: #6b7280;
  --border: #e5d9ce;
  --radius: 16px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
}

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

html,
body {
  margin: 0;
  padding: 0;
  background: linear-gradient(rgba(0, 0, 0, 0.3), rgba(0, 0, 0, 0.3)),
    url('background.jpg') no-repeat center top fixed;
  background-size: cover;
  color: var(--text);
  font-family: var(--font-sans);
  min-height: 100vh;
}

body {
  display: flex;
  flex-direction: column;
}

.container {
  width: 100%;
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.site-header {
  padding: 30px 0 20px;
  text-align: center;
}

.site-header h1 {
  margin: 0;
  font-size: 2.5rem;
  letter-spacing: -0.5px;
  color: var(--text);
}

.tagline {
  margin: 8px 0 0;
  color: var(--text-light);
  font-size: 0.95rem;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

main {
  flex: 1;
  padding-bottom: 40px;
}

/* Search Section */
.search-section {
  margin: 30px 0;
  text-align: center;
}

.search-box {
  display: flex;
  gap: 10px;
  max-width: 600px;
  margin: 0 auto;
  background: white;
  border-radius: 50px;
  padding: 8px 8px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
}

.search-input {
  flex: 1;
  border: none;
  background: white;
  padding: 12px 20px;
  font-size: 1rem;
  outline: none;
  border-radius: 50px;
  color: var(--text);
}

.search-input::placeholder {
  color: #9ca3af;
}

.search-btn {
  background: var(--accent);
  border: none;
  border-radius: 50px;
  width: 50px;
  height: 50px;
  font-size: 1.2rem;
  cursor: pointer;
  transition: background 0.2s;
}

.search-btn:hover {
  background: var(--accent-hover);
}

/* Teachers Grid */
.teachers-section {
  margin: 40px 0;
}

.teachers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  margin-bottom: 40px;
}

.teacher-card {
  background: white;
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s;
  cursor: pointer;
}

.teacher-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.25);
}

.teacher-avatar {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: 50%;
  margin: 0 auto 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: white;
}

.teacher-name {
  font-size: 1.2rem;
  font-weight: 600;
  margin: 0 0 4px;
  color: var(--text);
}

.teacher-subject {
  color: var(--text-light);
  font-size: 0.9rem;
  margin: 0 0 12px;
}

.teacher-rating {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-bottom: 8px;
}

.teacher-stars {
  font-size: 1.1rem;
  letter-spacing: 2px;
}

.teacher-reviews {
  color: var(--text-light);
  font-size: 0.85rem;
}

/* Reviews Section */
.reviews-section {
  margin: 40px 0;
}

.reviews-section h2 {
  margin: 0 0 20px;
  font-size: 1.5rem;
  color: var(--text);
}

.reviews-feed {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.review-bubble {
  background: white;
  border-radius: 16px;
  padding: 20px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  border-left: 4px solid var(--accent);
}

.review-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.review-icon {
  font-size: 1.5rem;
  background: var(--accent);
  color: white;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.review-text {
  font-weight: 500;
  color: var(--text);
  margin: 0;
}

.review-stars {
  font-size: 1rem;
  letter-spacing: 2px;
  margin-top: 8px;
}

.empty-state {
  text-align: center;
  color: var(--text-light);
  padding: 40px 20px;
  font-size: 1rem;
}

/* Write Review Button */
.btn-write-review {
  display: block;
  margin: 30px auto;
  padding: 14px 40px;
  background: var(--success);
  color: white;
  border: none;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 8px 20px rgba(34, 197, 94, 0.3);
  transition: all 0.2s;
}

.btn-write-review:hover {
  background: #16a34a;
  transform: scale(1.05);
  box-shadow: 0 12px 28px rgba(34, 197, 94, 0.4);
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  z-index: 1000;
  overflow-y: auto;
}

.modal.show {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-content {
  background: white;
  border-radius: var(--radius);
  padding: 30px;
  max-width: 600px;
  width: 100%;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  position: relative;
}

.modal-close {
  position: absolute;
  top: 15px;
  right: 20px;
  font-size: 1.8rem;
  cursor: pointer;
  color: var(--text-light);
  transition: color 0.2s;
}

.modal-close:hover {
  color: var(--text);
}

.modal-content h2 {
  margin-top: 0;
  margin-bottom: 20px;
  font-size: 1.5rem;
}

/* Form */
.form-row {
  margin-bottom: 15px;
}

label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 6px;
  color: var(--text);
}

input[type="text"],
select,
textarea {
  width: 100%;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1.5px solid var(--border);
  background: white;
  color: var(--text);
  font-size: 0.95rem;
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

input[type="text"]:focus,
select:focus,
textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

textarea {
  resize: vertical;
  min-height: 80px;
}

.disclaimer {
  font-size: 0.8rem;
  color: var(--text-light);
  margin: 15px 0;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: 50px;
  border: none;
  background: var(--success);
  color: white;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.2s;
  width: 100%;
}

.btn-primary:hover {
  background: #16a34a;
  transform: translateY(-2px);
}

.btn-primary:active {
  transform: translateY(0);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  font-size: 0.8rem;
  color: var(--text-light);
  text-align: center;
}

.site-footer p {
  margin: 5px 0;
}

/* Responsive */
@media (max-width: 768px) {
  .site-header h1 {
    font-size: 2rem;
  }

  .teachers-grid {
    grid-template-columns: 1fr;
  }

  .modal-content {
    padding: 20px;
  }
}