/* =====================
       CSS VARIABLES (THEME)
    ====================== */
    :root {
      --bg: #f4f6fb;
      --card: #ffffff;
      --text: #1f2933;
      --subtext: #6b7280;
      --button: #f1f5f9;
      --button-hover: #e2e8f0;
      --border: #e5e7eb;
    }

    @media (prefers-color-scheme: dark) {
      :root {
        --bg: #0f172a;
        --card: #1e293b;
        --text: #f8fafc;
        --subtext: #94a3b8;
        --button: #334155;
        --button-hover: #475569;
        --border: #334155;
      }
    }

    /* =====================
       GLOBAL STYLES
    ====================== */
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    }

    body {
      background: var(--bg);
      color: var(--text);
      min-height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 20px;
    }

    /* =====================
       CARD
    ====================== */
    .card {
      width: 100%;
      max-width: 420px;
      background: var(--card);
      border-radius: 20px;
      padding: 32px 24px;
      text-align: center;
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
      border: 1px solid var(--border);
    }

    .avatar {
      width: 120px;
      height: 120px;
      border-radius: 50%;
      margin-bottom: 16px;
      border: 3px solid var(--border);
      object-fit: cover;
    }

    h1 {
      font-size: 26px;
      margin-bottom: 4px;
    }

    .subtitle {
      font-size: 14px;
      color: var(--subtext);
      margin-bottom: 28px;
    }

    /* =====================
       LINKS
    ====================== */
    .links {
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .link-btn {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 12px;
      padding: 14px 16px;
      background: var(--button);
      color: var(--text);
      text-decoration: none;
      border-radius: 12px;
      font-size: 16px;
      font-weight: 500;
      border: 1px solid var(--border);
      transition: transform 0.2s ease, background 0.2s ease;
    }

    .link-btn:hover {
      background: var(--button-hover);
      transform: translateY(-2px);
    }

    .icon {
      width: 20px;
      height: 20px;
      stroke-width: 2;
    }

    footer {
      margin-top: 28px;
      font-size: 12px;
      color: var(--subtext);
    }