:root {
    --bg: #f5f6f8;
    --card-bg: rgba(255, 255, 255, 0.7);
    --border: rgba(0, 0, 0, 0.08);
    --text-main: #111;
    --text-sub: #666;
    --accent: #007aff;
    --pip-top: #00bfa5;
    --pip-bottom: #a8e6cf;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    height: 100vh;
    background: radial-gradient(circle at top, #ffffff 0%, #eef0f4 60%);
    font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--text-main);
}

#container {
    position: relative;
    width: min(560px, 92%);
    padding: 36px 34px 40px;
    background: var(--card-bg);
    backdrop-filter: blur(18px) saturate(160%);
    border-radius: 22px;
    border: 1px solid var(--border);
    box-shadow:
        0 30px 60px rgba(0,0,0,0.12),
        inset 0 1px 0 rgba(255,255,255,0.6);
    text-align: center;
}

#top-left {
    position: absolute;
    top: 18px;
    left: 18px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-sub);
}

#week-toggle {
    position: absolute;
    top: 18px;
    right: 18px;
    display: flex;
    gap: 4px;
    padding: 4px;
    background: rgba(0,0,0,0.06);
    border-radius: 999px;
}

#week-toggle button {
    border: none;
    background: transparent;
    padding: 6px 14px;
    border-radius: 999px;
    font-size: 0.85rem;
    font-weight: 600;
    color: #444;
    cursor: pointer;
    transition: all 0.2s ease;
}

#week-toggle button.active {
    background: white;
    color: var(--accent);
    box-shadow: 0 2px 6px rgba(0,0,0,0.15);
}

#main-line {
    font-size: clamp(2.2rem, 4vw, 2.8rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 14px;
}

#sub-line {
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--text-sub);
}

#color-picker {
    margin-top: 24px;
    display: flex;
    justify-content: center;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
    font-size: 0.9rem;
    color: var(--text-sub);
}

#color-picker input[type="color"] {
    width: 32px;
    height: 32px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
}

video {
    width: 1px;
    height: 1px;
    opacity: 0;
    position: absolute;
    pointer-events: none;
}