:root {
      --bg: #faf7f2;
      --surface: #ffffff;
      --border: #e8e0d4;
      --accent: #b05e3a;
      --accent-light: #f5ece6;
      --text: #1c1814;
      --text-muted: #7a6e63;
      --text-dim: #b0a89e;
    }

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

    body {
      font-family: 'DM Sans', sans-serif;
      font-weight: 300;
      background: var(--bg);
      color: var(--text);
      min-height: 100vh;
    }

    header {
      border-bottom: 1px solid var(--border);
      background: var(--surface);
      padding: 0 40px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 64px;
      position: sticky;
      top: 0;
      z-index: 10;
    }

    .logo {
      font-family: 'Lora', serif;
      font-size: 20px;
      color: var(--text);
      text-decoration: none;
      letter-spacing: -0.3px;
    }

    .logo span { color: var(--accent); }

    nav a {
      font-size: 13px;
      color: var(--text-muted);
      text-decoration: none;
      margin-left: 28px;
      font-weight: 400;
      transition: color 0.15s;
    }

    nav a:hover { color: var(--text); }
    nav a.active { color: var(--text); font-weight: 500; }

    .hero {
      padding: 60px 40px 48px;
      max-width: 900px;
      margin: 0 auto;
    }

    .hero-label {
      font-size: 11px;
      font-weight: 500;
      text-transform: uppercase;
      letter-spacing: 2.5px;
      color: var(--accent);
      margin-bottom: 14px;
    }

    .hero h1 {
      font-family: 'Lora', serif;
      font-size: 42px;
      line-height: 1.15;
      letter-spacing: -0.5px;
      margin-bottom: 14px;
    }

    .hero p {
      font-size: 16px;
      color: var(--text-muted);
      max-width: 480px;
    }

    .content {
      max-width: 900px;
      margin: 0 auto;
      padding: 0 40px 80px;
    }

    .state-msg {
      text-align: center;
      padding: 80px 20px;
      color: var(--text-muted);
      font-size: 15px;
    }

    .spinner {
      width: 28px;
      height: 28px;
      border: 2px solid var(--border);
      border-top-color: var(--accent);
      border-radius: 50%;
      animation: spin 0.7s linear infinite;
      margin: 0 auto 16px;
    }

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

    .teachers-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
      gap: 20px;
    }

    .teacher-card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 12px;
      padding: 28px 24px;
      text-decoration: none;
      color: inherit;
      display: block;
      transition: border-color 0.15s, transform 0.15s, box-shadow 0.15s;
      opacity: 0;
      transform: translateY(8px);
    }

    .teacher-card.visible {
      opacity: 1;
      transform: translateY(0);
      transition: opacity 0.3s ease, transform 0.3s ease, border-color 0.15s, box-shadow 0.15s;
    }

    .teacher-card:hover {
      border-color: var(--accent);
      box-shadow: 0 4px 20px rgba(176, 94, 58, 0.08);
      transform: translateY(-2px);
    }

    .teacher-avatar {
      width: 52px;
      height: 52px;
      border-radius: 50%;
      background: var(--accent-light);
      border: 1px solid var(--border);
      display: flex;
      align-items: center;
      justify-content: center;
      font-family: 'Lora', serif;
      font-size: 20px;
      color: var(--accent);
      margin-bottom: 16px;
      overflow: hidden;
    }

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

    .teacher-name {
      font-family: 'Lora', serif;
      font-size: 18px;
      color: var(--text);
      margin-bottom: 8px;
    }

    .teacher-bio {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.5;
      display: -webkit-box;
      -webkit-line-clamp: 3;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }

    .teacher-link {
      font-size: 12px;
      color: var(--accent);
      font-weight: 500;
      margin-top: 14px;
      display: block;
    }

    @media (max-width: 600px) {
      header { padding: 0 20px; }
      .hero { padding: 40px 20px 32px; }
      .hero h1 { font-size: 30px; }
      .content { padding: 0 20px 60px; }
    }

    .nav-auth {
      font-size: 14px;
      color: var(--text-muted);
      text-decoration: none;
      margin-left: 24px;
      font-weight: 500;
      color: var(--accent);
    }
    .nav-auth:hover { opacity: 0.8; }

    /* ── Footer ── */
    footer {
      border-top: 1px solid var(--border);
      background: var(--surface);
      padding: 28px 40px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
    }
    .footer-left { font-size: 13px; color: var(--text-dim); line-height: 1.6; }
    .footer-left a { color: var(--text-dim); text-decoration: none; }
    .footer-left a:hover { color: var(--text-muted); }
    .footer-right { display: flex; gap: 20px; }
    .footer-right a { font-size: 13px; color: var(--text-dim); text-decoration: none; transition: color 0.15s; }
    .footer-right a:hover { color: var(--text-muted); }
    @media (max-width: 600px) { footer { padding: 24px 20px; flex-direction: column; align-items: flex-start; } }