/* ============================================================
   Board Page 특정 스타일 (pages/board.css)
   ============================================================ */

/* ── 지역 필터 탭 ── */
.region-tabs {
    background: var(--surface);
    padding: var(--space-sm) var(--space-xs);
    /* 6px Standard */
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    align-content: center;
    gap: var(--space-xs);
    border-bottom: 1px solid var(--border);
}

.region-tab {
    padding: var(--space-xs) var(--space-sm);
    /* Standardized to 6px 12px */
    font-size: 13px;
    /* Standardized constant size for stability */
    font-weight: 500;
    color: var(--text-muted);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 20px;
    cursor: pointer;
    white-space: nowrap;
    transition: all .15s;
    user-select: none;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    touch-action: manipulation;
}

@media (hover: hover) {
    .region-tab:hover {
        background: var(--accent-bg);
        color: var(--accent);
    }
}

.region-tab:active {
    background: var(--accent-bg);
    opacity: 0.8;
}

.region-tab.active {
    color: #fff !important;
    font-weight: 600;
    border-color: transparent !important;
}

.region-tab[data-r="all"].active {
    background: var(--accent);
}

.region-tab[data-r="yongsan"].active {
    background: var(--c-yongsan);
}

.region-tab[data-r="itw2"].active {
    background: var(--c-itw2);
}

.region-tab[data-r="itw1"].active {
    background: var(--c-itw1);
}

.region-tab[data-r="bogwang"].active {
    background: var(--c-bogwang);
}

.region-tab[data-r="dongbing"].active {
    background: var(--c-dongbing);
}

.region-tab[data-r="hannam-s"].active {
    background: var(--c-hannam-s);
}

.region-tab[data-r="hannam-n"].active {
    background: var(--c-hannam-n);
}

.region-tab[data-r="etc"].active {
    background: var(--c-etc);
}

.region-tab[data-r="redev"].active {
    background: var(--c-redev);
}

/* ── 카드 그리드 ── */
.cards-container {
    padding: 0 var(--space-xs) var(--space-xs);
    display: grid;
    /* Fit 7 columns on mobile (approx 500px) by using a smaller minmax */
    grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
    gap: 4px; /* Aggressive reduction for tighter UI */
}

.card-item {
    background: var(--surface);
    border-radius: 12px;
    padding: 8px 4px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    cursor: pointer;
    border: 1px solid var(--border-light);
    text-decoration: none;
    transition: all .2s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    touch-action: manipulation;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.card-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--card-color, var(--border));
    border-radius: 0;
}

@media (hover: hover) {
    .card-item:hover {
        transform: translateY(-2px);
        box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
        border-color: var(--card-color);
    }
}

.card-item:active {
    transform: scale(0.98);
}

.card-num {
    font-family: var(--font-mono);
    font-size: clamp(18px, 5vmin, 22px);
    font-weight: 700;
    color: var(--text);
    line-height: 1;
    letter-spacing: -0.5px;
}

.card-region {
    font-size: 9px;
    font-weight: 500;
    color: var(--text-muted);
    text-align: center;
    line-height: 1.2;
    opacity: 0.8;
}

.card-badge {
    font-size: 11px;
    font-weight: 600;
    padding: 3px 8px;
    border-radius: 12px;
    background: var(--card-color-light, #f0f0f0);
    color: var(--card-color, var(--text-muted));
}

.card-item.recent::after {
    content: '●';
    position: absolute;
    top: 6px;
    right: 6px;
    font-size: 7px;
    color: #27ae60;
}

/* ── 섹션 헤더 ── */
.section-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-xs) var(--space-xs);
    position: sticky;
    top: 0;
    background: var(--bg);
    z-index: 10;
    margin-bottom: var(--space-xs);
}

.section-dot {
    width: 4px;
    height: 16px;
    border-radius: 2px;
    flex-shrink: 0;
}

.section-title {
    font-size: 14px;
    font-weight: 800;
    letter-spacing: -0.3px;
    color: var(--text);
}

.section-count {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-muted);
    font-family: var(--font-mono);
    background: var(--border-light);
    padding: 2px 6px;
    border-radius: 6px;
}

.section-line {
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, var(--border), transparent);
}

.search-wrap {
    position: relative;
    padding: 0 var(--space-xs);
    /* 6px Standard */
    margin-top: var(--space-xs);
    /* Standard 6px gap from filter tabs */
    margin-bottom: var(--space-xs);
}

.search-icon {
    position: absolute;
    right: 24px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    cursor: pointer;
    z-index: 1;
}

.search-input {
    width: 100%;
    height: 38px;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    /* 6px */
    padding: 0 80px 0 var(--space-xs);
    /* 6px Standard */
    font-size: 14px;
    font-family: inherit;
    background: var(--surface);
    outline: none;
    transition: border-color .15s;
    color: var(--text);
}

.rt-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.rt-num {
    font-family: var(--font-mono);
    font-weight: 600;
    font-size: 12px;
    opacity: 0.7;
    position: relative;
    top: 1px;
}

.region-tab.active .rt-num {
    opacity: 1;
    color: #fff;
}

.region-tab.active .rt-dot {
    background: #fff !important;
}

@media (min-width: 600px) {
    .cards-container {
        grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
        gap: 6px;
    }
}

/* ── [SECURITY] 시스템 다크 모드 강제 고대비 스타일 ── */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --bg: #121212 !important;
        --surface: #1e1e1e !important;
        --bg-faint: #252525 !important;
        --border: #333333 !important;
        --text: #ffffff !important;
        --text-muted: #aaaaaa !important;
    }

    :root:not([data-theme="light"]) body.itw-mobile {
        background-color: #121212 !important;
        color: #ffffff !important;
    }

    :root:not([data-theme="light"]) .region-tabs,
    :root:not([data-theme="light"]) .card-item,
    :root:not([data-theme="light"]) .search-input,
    :root:not([data-theme="light"]) .modal {
        background-color: #1e1e1e !important;
        border-color: #333333 !important;
    }

    :root:not([data-theme="light"]) .card-num,
    :root:not([data-theme="light"]) .section-title,
    :root:not([data-theme="light"]) .modal-title,
    :root:not([data-theme="light"]) .form-label {
        color: #ffffff !important;
    }

    :root:not([data-theme="light"]) .card-region,
    :root:not([data-theme="light"]) .section-count,
    :root:not([data-theme="light"]) .search-icon {
        color: #aaaaaa !important;
    }

    :root:not([data-theme="light"]) .region-tab {
        background-color: #1e1e1e !important;
        border-color: #444 !important;
        color: #aaaaaa !important;
    }

    :root:not([data-theme="light"]) .region-tab:active,
    :root:not([data-theme="light"]) .card-item:active {
        background-color: #252525 !important;
    }

    :root:not([data-theme="light"]) .search-input {
        background-color: #252525 !important;
        border-color: #444 !important;
        color: #ffffff !important;
    }

    :root:not([data-theme="light"]) .itw-skeleton {
        background: linear-gradient(90deg, #252525 25%, #333 50%, #252525 75%) !important;
        background-size: 200% 100% !important;
    }

    /* 카드 내 배지 색상 보정 */
    :root:not([data-theme="light"]) .card-badge {
        background-color: #252525 !important;
        filter: brightness(1.2) contrast(1.2);
    }

    /* 상단 필터 탭 활성화 상태 가시성 확보 */
    :root:not([data-theme="light"]) .region-tab.active .rt-num {
        color: #ffffff !important;
    }
}

/* ── 더보기 버튼 ── */
.load-more-btn {
    width: calc(100% - var(--space-md));
    margin: var(--space-sm) auto;
    padding: 12px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    color: var(--accent);
    font-size: 13px;
    font-weight: 700;
    font-family: inherit;
    cursor: pointer;
    display: block;
    transition: all 0.2s;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
    text-align: center;
}

.load-more-btn:active {
    background: var(--bg-faint);
    transform: scale(0.98);
    box-shadow: none;
}

@media (min-width: 600px) {
    .load-more-btn {
        max-width: 280px;
    }
}