/* ==========================================
    4대보험 계산기 — style.css
    파스텔 스카이 블루 테마
    ========================================== */

    :root {
        --bg: #dff0fa;
        --bg2: #eef7fd;
        --bg3: #d4ebf7;
        --card: #ffffff;
        --border: #b8d8ef;
        --border2: #93c4e2;
        --text: #1b3f5e;
        --text2: #3d7099;
        --text3: #7aaec8;
        --accent: #2196c9;
        --accent2: #43b0e8;
        --blue: #1976b8;
        --green: #2da44e;
        --red: #d9534f;
        --purple: #7c5cbf;
        --orange: #e07c2a;
        --teal: #1aaa6e;
        --radius: 12px;
        --radius-sm: 8px;
        --shadow: 0 4px 24px rgba(33,150,201,0.12);
    }
    
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    
    /* ── IBM Plex Mono — plain zero 기본 적용 ──────────────────
        DM Mono에서 IBM Plex Mono로 교체.
        IBM Plex Mono는 slashed zero 없이 plain zero가 기본값.
        font-feature-settings 별도 설정 불필요.
    ──────────────────────────────────────────────────────────── */
    
    body {
        background: var(--bg);
        color: var(--text);
        font-family: 'Noto Sans KR', sans-serif;
        font-size: 14px;
        line-height: 1.6;
        min-height: 100vh;
    }
    
    /* 배경 그라디언트 */
    body::before {
        content: '';
        position: fixed;
        inset: 0;
        background:
        radial-gradient(ellipse 70% 50% at 15% 5%, rgba(168,220,245,0.55) 0%, transparent 60%),
        radial-gradient(ellipse 50% 60% at 85% 85%, rgba(178,228,252,0.45) 0%, transparent 60%),
        radial-gradient(ellipse 40% 30% at 50% 50%, rgba(255,255,255,0.3) 0%, transparent 70%);
        pointer-events: none;
        z-index: 0;
    }
    
    .container {
        max-width: 1100px;
        margin: 0 auto;
        padding: 24px 20px 60px;
        position: relative;
        z-index: 1;
    }
    
    /* ── 헤더 ── */
    header {
        text-align: center;
        margin-bottom: 36px;
        padding-top: 12px;
    }
    
    .header-badge {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        background: rgba(33,150,201,0.1);
        border: 1px solid rgba(33,150,201,0.3);
        color: var(--accent);
        font-size: 11px;
        font-weight: 700;
        letter-spacing: 0.12em;
        text-transform: uppercase;
        padding: 4px 12px;
        border-radius: 100px;
        margin-bottom: 14px;
    }
    
    h1 {
        font-size: clamp(24px, 5vw, 38px);
        font-weight: 900;
        letter-spacing: -0.03em;
        line-height: 1.1;
        background: linear-gradient(135deg, #1b3f5e 0%, #2196c9 100%);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
        margin-bottom: 8px;
    }
    
    .header-sub {
        color: var(--text3);
        font-size: 13px;
    }
    
    /* ── 카드 ── */
    .card {
        background: var(--card);
        border: 1px solid var(--border);
        border-radius: var(--radius);
        padding: 24px;
        box-shadow: 0 2px 12px rgba(33,150,201,0.07);
        transition: border-color 0.2s, box-shadow 0.2s;
    }
    .card:hover {
        border-color: var(--border2);
        box-shadow: 0 4px 20px rgba(33,150,201,0.13);
    }
    
    .card-title {
        font-size: 12px;
        font-weight: 700;
        letter-spacing: 0.08em;
        text-transform: uppercase;
        color: var(--text3);
        margin-bottom: 18px;
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .card-title::before {
        content: '';
        display: inline-block;
        width: 3px;
        height: 14px;
        background: var(--accent);
        border-radius: 2px;
    }
    
    /* ── 레이아웃 ── */
    .layout {
        display: grid;
        grid-template-columns: 380px 1fr;
        gap: 20px;
        align-items: start;
    }
    
    .left-col  { display: flex; flex-direction: column; gap: 16px; }
    .right-col { display: flex; flex-direction: column; gap: 16px; }
    
    /* ── 탭 ── */
    .tab-group {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 4px;
        background: var(--bg2);
        padding: 4px;
        border-radius: var(--radius-sm);
        margin-bottom: 6px;
    }
    
    .tab-btn {
        padding: 9px;
        border: none;
        background: transparent;
        color: var(--text2);
        font-family: inherit;
        font-size: 13px;
        font-weight: 500;
        border-radius: 6px;
        cursor: pointer;
        transition: all 0.2s;
    }
    .tab-btn.active {
        background: var(--accent);
        color: #ffffff;
        font-weight: 700;
    }
    
    /* ── 입력 필드 ── */
    .input-group { margin-bottom: 14px; }
    .input-group:last-child { margin-bottom: 0; }
    
    label {
        display: block;
        font-size: 12px;
        font-weight: 500;
        color: var(--text2);
        margin-bottom: 6px;
    }
    
    .input-wrap {
        position: relative;
        display: flex;
        align-items: center;
    }
    
    .input-prefix {
        position: absolute;
        left: 12px;
        color: var(--text3);
        font-size: 13px;
        pointer-events: none;
        font-family: 'IBM Plex Mono', monospace;
    }
    
    .input-suffix {
        position: absolute;
        right: 12px;
        color: var(--text3);
        font-size: 12px;
        pointer-events: none;
    }
    
    input[type="number"],
    input[type="text"],
    select {
        width: 100%;
        background: var(--bg2);
        border: 1px solid var(--border);
        border-radius: var(--radius-sm);
        color: var(--text);
        font-family: 'IBM Plex Mono', monospace;
        font-size: 15px;
        padding: 10px 52px 10px 32px;
        outline: none;
        transition: border-color 0.2s, box-shadow 0.2s;
        -moz-appearance: textfield;
    }
    
    input[type="number"]::-webkit-outer-spin-button,
    input[type="number"]::-webkit-inner-spin-button { -webkit-appearance: none; }
    
    select {
        font-family: 'Noto Sans KR', sans-serif;
        font-size: 13px;
        padding: 10px 32px 10px 12px;
        cursor: pointer;
        appearance: none;
        background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%237aaec8' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
        background-repeat: no-repeat;
        background-position: right 12px center;
    }
    
    input[type="number"]:focus,
    input[type="text"]:focus,
    select:focus {
        border-color: var(--accent);
        box-shadow: 0 0 0 3px rgba(33,150,201,0.15);
    }
    
    input[type="text"]::placeholder,
    input[type="number"]::placeholder {
        font-family: 'IBM Plex Mono', monospace;
        color: var(--text3);
        opacity: 1;
    }
    
    .input-hint {
        font-size: 11px;
        color: var(--text3);
        margin-top: 4px;
    }
    
    .input-error {
        font-size: 11px;
        color: var(--red);
        margin-top: 4px;
        display: none;
    }
    .input-error.show { display: block; }
    
    /* ── 슬라이더 ── */
    .slider-wrap { margin-bottom: 16px; }
    
    .slider-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-bottom: 8px;
    }
    
    .slider-label { font-size: 12px; font-weight: 500; color: var(--text2); }
    
    .slider-value {
        font-family: 'IBM Plex Mono', monospace;
        font-size: 13px;
        color: var(--accent);
        font-weight: 500;
    }
    
    input[type="range"] {
        -webkit-appearance: none;
        width: 100%;
        height: 4px;
        background: var(--border2);
        border-radius: 2px;
        outline: none;
    }
    input[type="range"]::-webkit-slider-thumb {
        -webkit-appearance: none;
        width: 18px;
        height: 18px;
        border-radius: 50%;
        background: var(--accent);
        cursor: pointer;
        box-shadow: 0 0 8px rgba(33,150,201,0.45);
        transition: box-shadow 0.2s;
    }
    input[type="range"]::-webkit-slider-thumb:hover {
        box-shadow: 0 0 14px rgba(33,150,201,0.65);
    }
    
    /* ── 체크박스 ── */
    .checkbox-group {
        display: flex;
        align-items: center;
        gap: 8px;
        cursor: pointer;
        margin-bottom: 10px;
    }
    .checkbox-group input[type="checkbox"] {
        width: 16px;
        height: 16px;
        accent-color: var(--accent);
        cursor: pointer;
    }
    .checkbox-label {
        font-size: 13px;
        color: var(--text2);
        cursor: pointer;
    }
    
    /* ── 요약 그리드 ── */
    .summary-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 12px;
        margin-bottom: 16px;
    }
    
    .summary-item {
        background: var(--bg2);
        border: 1px solid var(--border);
        border-radius: var(--radius-sm);
        padding: 14px;
        text-align: center;
        transition: all 0.25s;
    }
    .summary-item.highlight {
        background: rgba(33,150,201,0.08);
        border-color: rgba(33,150,201,0.3);
    }
    
    .summary-label {
        font-size: 10px;
        font-weight: 700;
        letter-spacing: 0.06em;
        text-transform: uppercase;
        color: var(--text3);
        margin-bottom: 6px;
    }
    
    .summary-value {
        font-family: 'IBM Plex Mono', monospace;
        font-size: 16px;
        font-weight: 500;
        color: var(--text);
    }
    .summary-item.highlight .summary-value { color: var(--accent); }
    
    .summary-sub {
        font-size: 10px;
        color: var(--text3);
        margin-top: 2px;
    }
    
    /* ── 보험 테이블 ── */
    .insurance-table {
        width: 100%;
        border-collapse: collapse;
        font-size: 13px;
    }
    
    .insurance-table thead th {
        text-align: right;
        padding: 8px 10px;
        font-size: 10px;
        font-weight: 700;
        letter-spacing: 0.06em;
        text-transform: uppercase;
        color: var(--text3);
        border-bottom: 1px solid var(--border);
    }
    .insurance-table thead th:first-child { text-align: left; }
    
    .insurance-table tbody tr {
        border-bottom: 1px solid var(--border);
        transition: background 0.15s;
    }
    .insurance-table tbody tr:last-child { border-bottom: none; }
    .insurance-table tbody tr:hover { background: rgba(33,150,201,0.04); }
    
    .insurance-table td {
        padding: 11px 10px;
        text-align: right;
        font-family: 'IBM Plex Mono', monospace;
        color: var(--text2);
    }
    .insurance-table td:first-child {
        text-align: left;
        font-family: 'Noto Sans KR', sans-serif;
        font-weight: 500;
        color: var(--text);
    }
    
    .ins-dot {
        display: inline-block;
        width: 8px;
        height: 8px;
        border-radius: 50%;
        margin-right: 8px;
        vertical-align: middle;
    }
    
    .table-total td {
        font-weight: 700;
        color: var(--text) !important;
        border-top: 1px solid var(--border2);
        padding-top: 13px;
        font-size: 14px;
    }
    
    .worker-val   { color: var(--blue)   !important; }
    .employer-val { color: var(--orange) !important; }
    .rate-val     { color: var(--text3)  !important; font-size: 11px; }
    
    /* ── 차트 ── */
    .charts-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }
    
    .chart-container { position: relative; }
    
    .chart-wrap {
        position: relative;
        height: 200px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .donut-center {
        position: absolute;
        text-align: center;
        pointer-events: none;
    }
    
    .donut-pct {
        font-family: 'IBM Plex Mono', monospace;
        font-size: 22px;
        font-weight: 500;
        color: var(--red);
        line-height: 1;
    }
    
    .donut-label {
        font-size: 10px;
        color: var(--text3);
        margin-top: 2px;
    }
    
    .chart-legend {
        display: flex;
        flex-wrap: wrap;
        gap: 8px 12px;
        margin-top: 12px;
    }
    
    .legend-item {
        display: flex;
        align-items: center;
        gap: 5px;
        font-size: 11px;
        color: var(--text2);
    }
    
    .legend-dot {
        width: 8px;
        height: 8px;
        border-radius: 50%;
        flex-shrink: 0;
    }
    
    /* ── 비율 바 ── */
    .ratio-bar-section { margin-top: 4px; }
    
    .ratio-row {
        display: flex;
        align-items: center;
        gap: 10px;
        margin-bottom: 10px;
    }
    
    .ratio-name {
        font-size: 12px;
        color: var(--text2);
        width: 80px;
        flex-shrink: 0;
    }
    
    .ratio-track {
        flex: 1;
        height: 8px;
        background: var(--bg2);
        border-radius: 4px;
        overflow: hidden;
    }
    
    .ratio-fill {
        height: 100%;
        border-radius: 4px;
        transition: width 0.5s cubic-bezier(0.4,0,0.2,1);
    }
    
    .ratio-pct {
        font-family: 'IBM Plex Mono', monospace;
        font-size: 11px;
        color: var(--text3);
        width: 38px;
        text-align: right;
        flex-shrink: 0;
    }
    
    /* ── 연봉 비교 ── */
    .compare-wrap {
        display: flex;
        flex-direction: column;
        gap: 8px;
    }
    
    .compare-row {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 10px 14px;
        background: var(--bg2);
        border-radius: var(--radius-sm);
        border: 1px solid var(--border);
    }
    
    .compare-lbl { font-size: 12px; color: var(--text2); font-weight: 500; }
    .compare-val {
        font-family: 'IBM Plex Mono', monospace;
        font-size: 13px;
        font-weight: 500;
        color: var(--text);
    }
    .compare-val.up   { color: var(--green); }
    .compare-val.down { color: var(--red); }
    
    /* ── 상세 보기 토글 ── */
    .detail-toggle {
        display: flex;
        align-items: center;
        gap: 6px;
        padding: 8px 0;
        background: none;
        border: none;
        color: var(--text3);
        font-family: inherit;
        font-size: 12px;
        cursor: pointer;
        transition: color 0.2s;
        margin-top: 4px;
    }
    .detail-toggle:hover { color: var(--text2); }
    
    .detail-toggle svg { transition: transform 0.2s; }
    .detail-toggle.open svg { transform: rotate(180deg); }
    
    .detail-content {
        display: none;
        margin-top: 8px;
        padding: 14px;
        background: var(--bg);
        border-radius: var(--radius-sm);
        border: 1px solid var(--border);
        font-size: 12px;
        line-height: 2;
        color: var(--text3);
        font-family: 'IBM Plex Mono', monospace;
    }
    .detail-content.show { display: block; }
    
    .detail-row { display: flex; justify-content: space-between; }
    .detail-key { color: var(--text3); }
    .detail-val { color: var(--text2); }
    
    /* ── 빈 상태 ── */
    .empty-state {
        text-align: center;
        padding: 40px 20px;
        color: var(--text3);
    }
    .empty-state .empty-icon {
        font-size: 40px;
        margin-bottom: 12px;
        opacity: 0.3;
    }
    
    /* ── 연도 선택 ── */
    .year-select-wrap {
        display: flex;
        align-items: center;
        gap: 8px;
        margin-bottom: 4px;
    }
    
    .year-badge {
        font-size: 10px;
        font-weight: 700;
        background: rgba(33,150,201,0.12);
        color: var(--accent);
        border: 1px solid rgba(33,150,201,0.25);
        padding: 2px 8px;
        border-radius: 100px;
    }
    
    /* ── 애니메이션 ── */
    @keyframes fadeIn {
        from { opacity: 0; transform: translateY(8px); }
        to   { opacity: 1; transform: translateY(0); }
    }
    .fade-in { animation: fadeIn 0.3s ease forwards; }
    
    @keyframes countUp {
        from { opacity: 0.3; }
        to   { opacity: 1; }
    }
    .counting { animation: countUp 0.25s ease; }
    
    /* ── 반응형 ── */
    @media (max-width: 820px) {
        .layout       { grid-template-columns: 1fr; }
        .charts-grid  { grid-template-columns: 1fr; }
        .summary-grid { grid-template-columns: repeat(2, 1fr); }
    }
    
    @media (max-width: 480px) {
        .summary-grid     { grid-template-columns: 1fr 1fr; }
        .insurance-table  { font-size: 12px; }
        .container        { padding: 16px 14px 40px; }
    }
    
    /* ── 스크롤바 ── */
    ::-webkit-scrollbar       { width: 6px; }
    ::-webkit-scrollbar-track { background: var(--bg2); }
    ::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 3px; }