body {
            margin: 0;
            font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
            background: #111;
            color: #fff;
        }

        .container {
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            padding: 24px;
            box-sizing: border-box;
        }

        .clock-box {
            text-align: center;
            margin-bottom: 32px;
        }

        .clock-box h1 {
            margin: 8px 0;
            font-size: 48px;
            font-weight: 700;
            letter-spacing: -1px;
        }

        /* 광고 영역 */
        .ad-wrapper {
            width: 100%;
            max-width: 760px;
            margin-top: 24px;
            background: #1c1c1c;
            padding: 16px;
            border-radius: 12px;
        }

        .ad-notice {
            margin-top: 8px;
            font-size: 12px;
            color: #aaa;
            text-align: center;
        }

        /* 버튼 */
        .btn01 {
            margin-top: 16px;
            padding: 10px 18px;
            font-size: 14px;
            border: none;
            border-radius: 8px;
            background: #444;
            color: #fff;
            cursor: pointer;
        }

        .btn01:hover {
            background: #666;
        }

        /* 상단 복귀 */
        .top-nav {
            position: fixed;
            top: 16px;
            left: 16px;
            font-size: 14px;
        }

        .top-nav a {
            color: #aaa;
            text-decoration: none;
        }

        .page-info {
            margin-top: 24px;
            text-align: center;
            font-size: 14px;
            line-height: 1.6;
            color: #555;
        }

        .page-footer {
            margin: 40px 0 20px;
            text-align: center;
            font-size: 12px;
            color: #777;
        }

        .page-footer a {
            color: #777;
            text-decoration: none;
            margin: 0 4px;
        }

        footer {
            text-align: center;
            font-size: 13px;
            color: #666;
            margin: 40px 0 20px;
        }

        footer a {
            color: #666;
            text-decoration: none;
        }

        #target-day {
            margin-top: 8px;
            font-size: 0.95rem;
            color: #aaa;
        }

        .adfit-slot {
            display: block;
            margin: 2rem auto;
            text-align: center;
        }