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

    :root {
      --bg: #0a0f0d;
      --accent: #2ecc71;
      --accent-hover: #27ae60;
      --text: #e8f5e0;
      --muted: #7aab8a;
      --surface: #152219;
      --border: #1e3328;
      --btn-shadow: 0 8px 32px rgba(46,204,113,0.35);
    }

    [data-theme="light"] {
      --bg: #f0faf4;
      --accent: #1a8a45;
      --accent-hover: #157a3c;
      --text: #0d2b1a;
      --muted: #4a7a5c;
      --surface: #d6f0e0;
      --border: #b2d9c2;
      --btn-shadow: 0 8px 32px rgba(26,138,69,0.25);
    }

    body {
      font-family: 'Vazirmatn', sans-serif;
      background: var(--bg);
      color: var(--text);
      min-height: 100vh;
      overflow-x: hidden;
      transition: background 0.2s, color 0.2s;
    }

    .theme-toggle {
      position: fixed;
      top: 20px;
      left: 20px;
      z-index: 100;
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 50px;
      padding: 8px 16px;
      cursor: pointer;
      font-size: 18px;
      transition: background 0.2s, transform 0.2s;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .theme-toggle:hover { transform: scale(1.08); }
    .theme-toggle span { font-size: 12px; color: var(--muted); font-family: 'Vazirmatn', sans-serif; }

    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 80px 24px;
      position: relative;
      overflow: hidden;
    }

    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background-image:
        linear-gradient(var(--border) 1px, transparent 1px),
        linear-gradient(90deg, var(--border) 1px, transparent 1px);
      background-size: 48px 48px;
      opacity: 0.4;
    }

    .hero-inner {
      position: relative;
      z-index: 2;
      text-align: center;
      max-width: 640px;
    }

    .badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--surface);
      border: 1px solid var(--accent);
      color: var(--accent);
      font-size: 13px;
      padding: 6px 18px;
      border-radius: 50px;
      margin-bottom: 28px;
      letter-spacing: 0.04em;
    }
    .badge::before {
      content: '';
      width: 8px; height: 8px;
      background: var(--accent);
      border-radius: 50%;
      animation: pulse 1.6s ease-in-out infinite;
    }

    @keyframes pulse {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.4; transform: scale(0.7); }
    }

    .hero h1 {
      font-size: clamp(2.6rem, 7vw, 4.2rem);
      font-weight: 900;
      line-height: 1.15;
      margin-bottom: 20px;
      letter-spacing: -0.02em;
    }

    .hero h1 em {
      font-style: normal;
      color: var(--accent);
      position: relative;
    }
    .hero h1 em::after {
      content: '';
      position: absolute;
      bottom: -4px; left: 0; right: 0;
      height: 3px;
      background: var(--accent);
      border-radius: 4px;
      opacity: 0.5;
    }

    .hero p {
      font-size: 1.1rem;
      color: var(--muted);
      line-height: 1.8;
      margin-bottom: 44px;
      font-weight: 300;
    }

    .dl-group {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      justify-content: center;
    }

    .dl-btn {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      padding: 14px 28px;
      border-radius: 50px;
      font-family: 'Vazirmatn', sans-serif;
      font-size: 14px;
      font-weight: 700;
      text-decoration: none;
      transition: transform 0.25s, box-shadow 0.25s, background 0.25s;
      cursor: pointer;
      border: none;
      background: var(--accent);
      color: #ffffff;
      box-shadow: var(--btn-shadow);
    }

    .dl-btn:hover {
      background: var(--accent-hover);
      transform: translateY(-3px) scale(1.03);
      box-shadow: 0 14px 40px rgba(46,204,113,0.5);
    }

    .dl-btn svg {
      width: 20px;
      height: 20px;
      flex-shrink: 0;
      fill: #ffffff;
    }

    @media (max-width: 480px) {
      .dl-group { flex-direction: column; align-items: center; }
      .dl-btn { width: 100%; max-width: 280px; justify-content: center; }
    }