/* Reading Detox — 모바일 우선, 라이트/다크 자동 */
:root {
    --rd-bg: #f3f6fa;
    --rd-card: #ffffff;
    --rd-text: #2f3640;
    --rd-sub: #8a94a6;
    --rd-line: #e6ebf2;
    --rd-accent: #2ecc71;
    --rd-accent2: #27ae60;
    --rd-shadow: 0 6px 20px rgba(31, 46, 80, 0.08);
}
@media (prefers-color-scheme: dark) {
    :root {
        --rd-bg: #0f1420;
        --rd-card: #1a2233;
        --rd-text: #e8ecf3;
        --rd-sub: #8893a7;
        --rd-line: #2a3346;
        --rd-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
    }
}

.rd-wrap { max-width: 760px; margin: 0 auto; padding: 16px; color: var(--rd-text); }
.rd-wrap * { box-sizing: border-box; }

/* 버튼 */
.rd-btn {
    display: inline-block; background: var(--rd-accent); color: #fff; border: 0;
    padding: 11px 20px; border-radius: 10px; font-size: 15px; font-weight: 700;
    cursor: pointer; text-decoration: none; transition: background .15s;
}
.rd-btn:hover { background: var(--rd-accent2); }
.rd-btn-lg { padding: 14px 28px; font-size: 17px; }

/* 알림 */
.rd-notice { padding: 12px 16px; border-radius: 10px; margin-bottom: 14px; font-size: 14px; }
.rd-error { background: #fdecea; color: #c0392b; }
.rd-success { background: #eafaf1; color: #1e8449; }
@media (prefers-color-scheme: dark) {
    .rd-error { background: #3a2020; color: #ff8a80; }
    .rd-success { background: #18331f; color: #7ee2a8; }
}

/* 로그인 유도 */
.rd-gate { text-align: center; background: var(--rd-card); padding: 32px 20px; border-radius: 14px; box-shadow: var(--rd-shadow); }
.rd-gate p { margin: 0 0 16px; color: var(--rd-sub); }

/* 홈 */
.rd-hero { text-align: center; padding: 40px 16px 28px; }
.rd-hero h1 { font-size: 30px; margin: 0 0 10px; }
.rd-hero p { color: var(--rd-sub); margin: 0 0 22px; }
.rd-cards { display: grid; gap: 14px; grid-template-columns: 1fr; }
.rd-card { display: block; background: var(--rd-card); border-radius: 14px; padding: 22px; text-decoration: none; color: var(--rd-text); box-shadow: var(--rd-shadow); transition: transform .12s; }
.rd-card:hover { transform: translateY(-3px); }
.rd-card-icon { font-size: 34px; }
.rd-card h3 { margin: 10px 0 6px; }
.rd-card p { margin: 0; color: var(--rd-sub); font-size: 14px; }
@media (min-width: 680px) { .rd-cards { grid-template-columns: repeat(3, 1fr); } }

/* 프로그램 통계 */
.rd-stats { display: flex; gap: 12px; margin-bottom: 18px; }
.rd-stat { flex: 1; background: var(--rd-card); border-radius: 12px; padding: 16px; text-align: center; box-shadow: var(--rd-shadow); }
.rd-stat b { display: block; font-size: 28px; color: var(--rd-accent2); }
.rd-stat span { font-size: 13px; color: var(--rd-sub); }

/* 미션 목록 */
.rd-days { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.rd-day { background: var(--rd-card); border-radius: 14px; padding: 18px; box-shadow: var(--rd-shadow); border-left: 4px solid var(--rd-line); }
.rd-day-done { border-left-color: var(--rd-accent); }
.rd-day-open { border-left-color: #f0c040; }
.rd-day-locked { opacity: .55; }
.rd-day-head { display: flex; align-items: baseline; gap: 10px; margin-bottom: 8px; }
.rd-day-no { font-weight: 800; color: var(--rd-accent2); font-size: 14px; }
.rd-day-title { font-weight: 700; font-size: 16px; }
.rd-day-body { color: var(--rd-sub); font-size: 14px; line-height: 1.6; margin-bottom: 12px; }
.rd-done-badge { color: var(--rd-accent2); font-weight: 700; }
.rd-lock-badge { color: var(--rd-sub); font-size: 14px; }

/* 폼 */
.rd-form { display: grid; gap: 14px; background: var(--rd-card); padding: 22px; border-radius: 14px; box-shadow: var(--rd-shadow); }
.rd-form label { display: grid; gap: 6px; font-size: 14px; font-weight: 600; }
.rd-form input, .rd-form textarea, .rd-form select {
    width: 100%; padding: 11px 13px; border: 1px solid var(--rd-line); border-radius: 10px;
    background: var(--rd-bg); color: var(--rd-text); font-size: 15px; font-family: inherit;
}
.rd-form input[type=file] { padding: 8px; }
.rd-login form, .rd-register form { display: grid; gap: 14px; background: var(--rd-card); padding: 22px; border-radius: 14px; box-shadow: var(--rd-shadow); }
.rd-login input, .rd-register input { width: 100%; padding: 11px 13px; border: 1px solid var(--rd-line); border-radius: 10px; background: var(--rd-bg); color: var(--rd-text); font-size: 15px; }
.rd-login .button, .rd-login input[type=submit] { background: var(--rd-accent); color: #fff; border: 0; padding: 11px 20px; border-radius: 10px; font-weight: 700; cursor: pointer; }

/* 피드 그리드 */
.rd-grid { display: grid; gap: 14px; grid-template-columns: repeat(2, 1fr); }
@media (min-width: 680px) { .rd-grid { grid-template-columns: repeat(3, 1fr); } }
.rd-grid-item { background: var(--rd-card); border-radius: 12px; overflow: hidden; box-shadow: var(--rd-shadow); }
.rd-grid-item a { text-decoration: none; color: var(--rd-text); }
.rd-thumb { width: 100%; height: 150px; object-fit: cover; display: block; }
.rd-grid-item h3 { font-size: 15px; margin: 10px 12px 4px; }
.rd-meta { font-size: 12px; color: var(--rd-sub); margin: 0 12px; }
.rd-stars { color: #f0c040; }
.rd-excerpt { font-size: 13px; color: var(--rd-sub); margin: 8px 12px 14px; line-height: 1.5; }

/* 커뮤니티 목록 */
.rd-post-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.rd-post-item { background: var(--rd-card); border-radius: 12px; padding: 18px; box-shadow: var(--rd-shadow); }
.rd-post-item a { text-decoration: none; color: var(--rd-text); }
.rd-post-item h3 { margin: 0 0 6px; font-size: 17px; }

/* 페이지네이션 */
.rd-pager { display: flex; gap: 6px; justify-content: center; margin-top: 20px; flex-wrap: wrap; }
.rd-pager .page-numbers { padding: 8px 13px; border-radius: 8px; background: var(--rd-card); color: var(--rd-text); text-decoration: none; box-shadow: var(--rd-shadow); }
.rd-pager .current { background: var(--rd-accent); color: #fff; }

.rd-empty { text-align: center; color: var(--rd-sub); padding: 40px 0; }
.rd-wrap h2 { margin: 0 0 16px; }