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

body {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: #F8F8F8;
    color: #0D1117;
    font-family: 'GangwonEduTeun', 'Inter Tight', sans-serif;
    font-size: 1.12em;   /* 강원교육튼튼 기준 — 적당히 크게 */
    font-weight: 700;    /* 대체로 굵게 */
    overflow: hidden;
}

.container {
    background: #FFFFFF;
    padding: 48px;
    border-radius: 16px;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
    text-align: center;
    max-width: 480px;
    width: 90%;
}

.brand {
    font-family: 'GangwonEduTeun', 'GangwonEduTeun', sans-serif;
    font-size: 1.6em;
    font-weight: 800;
    letter-spacing: 2px;
    color: #0D1117;
    margin-bottom: 24px;
}

.brand .dot {
    color: #FF6A00;
}

.intro-title {
    font-family: 'GangwonEduTeun', 'GangwonEduTeun', sans-serif;
    font-size: 2em;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 16px;
    color: #0D1117;
}

.intro-desc {
    font-size: 1em;
    line-height: 1.7;
    margin-bottom: 32px;
    color: #4A515C;
}

.start-btn {
    font-family: 'GangwonEduTeun', 'Inter Tight', sans-serif;
    font-size: 1em;
    font-weight: 600;
    height: 48px;
    padding: 0 32px;
    border: none;
    border-radius: 8px;
    background: #0D1117;
    color: #fff;
    cursor: pointer;
    transition: all 0.3s ease;
}

.start-btn:hover {
    background: #383838;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.start-btn:active {
    transform: translateY(0);
}

.back-link {
    display: block;
    margin-top: 20px;
    font-size: 0.85em;
    color: #8A929E;
    text-decoration: none;
    transition: color 0.3s ease;
}

.back-link:hover {
    color: #FF6A00;
}

.status {
    margin-top: 20px;
    font-size: 0.95em;
    font-weight: 500;
    color: #8A929E;
    transition: color 0.3s;
}

.status.connecting {
    color: #FF6A00;
}

.status.connected {
    color: #7BDCB5;
}

.status.error {
    color: #E74C3C;
}

@media (max-width: 600px) {
    .container {
        padding: 32px 24px;
        width: 92%;
    }
    .intro-title {
        font-size: 1.6em;
    }
    .intro-desc {
        font-size: 0.95em;
    }
}