:root {
    --bg: #f6f7fb;
    --surface: #ffffff;
    --line: #dfe3eb;
    --text: #1f2937;
    --muted: #6b7280;
    --primary: #2563eb;
    --primary-soft: #dbeafe;
    --shadow: 0 8px 24px rgba(31, 41, 55, 0.08);
    --radius: 14px;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Noto Sans KR", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: var(--bg);
    color: var(--text);
}

.page {
    min-height: 100vh;
}

.mobile-shell {
    width: min(100%, 480px);
    margin: 0 auto;
    padding: 16px;
}

.btn {
    border: none;
    border-radius: 10px;
    padding: 11px 14px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    text-align: center;
    text-decoration: none;
    display: inline-block;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
}

.btn-secondary {
    background: var(--surface);
    border: 1px solid var(--line);
    color: var(--text);
}

.btn-text {
    color: var(--primary);
    background: transparent;
    border: 0;
    padding: 4px;
}

.simple-placeholder {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    margin-top: 24px;
    box-shadow: var(--shadow);
}

.simple-placeholder h1 {
    margin-top: 0;
}

body.download-lock-active {
    overflow: hidden;
}

.download-lock-overlay {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: rgba(15, 23, 42, 0.58);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.download-lock-overlay[hidden] {
    display: none;
}

.download-lock-panel {
    width: min(360px, 100%);
    background: #fff;
    border-radius: 16px;
    padding: 18px 16px;
    box-shadow: 0 16px 32px rgba(15, 23, 42, 0.26);
}

.download-lock-title {
    margin: 0 0 8px;
    font-size: 1rem;
    font-weight: 700;
}

.download-lock-message {
    margin: 0 0 10px;
    color: #475569;
    font-size: 0.88rem;
}

.download-lock-progress {
    width: 100%;
    height: 8px;
}