* { margin: 0; padding: 0; box-sizing: border-box; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            background: #f5f5f5;
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
        }
        .login-box {
            background: #fff;
            border-radius: 12px;
            padding: 48px 40px;
            box-shadow: 0 2px 12px rgba(0,0,0,0.08);
            text-align: center;
            width: 380px;
            max-width: calc(100% - 32px);
        }
        .login-box h1 {
            font-size: 24px;
            color: #333;
            margin-bottom: 8px;
        }
        .login-box p {
            color: #888;
            margin-bottom: 32px;
            font-size: 14px;
        }
        .kakao-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            width: 100%;
            padding: 14px 0;
            background: #FEE500;
            color: #000;
            border: none;
            border-radius: 8px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
        }
        .kakao-btn:hover { background: #f0d800; }
        .kakao-btn svg { width: 20px; height: 20px; }