/* ================================
   3in1 연말정산 계산기 스타일
   - 화이트/라이트그레이 + 포인트 블루
   - 2단 그리드, 카드형, 반응형
   ================================ */
:root {
    --bg: #f6f7fb;
    --text: #0f172a;
    --muted: #6b7280;
    --card: #ffffff;
    --border: #e5e7eb;
    --primary: #4f46e5;
    --primary-600: #4338ca;
    --gradient: linear-gradient(135deg, #4f46e5, #1e40af);
}

/* 리셋 */
* {
    box-sizing: border-box;
}
html,
body {
    height: 100%;
}
body {
    margin: 0;
    font-family: system-ui, -apple-system, "Noto Sans KR", Segoe UI, Roboto,
        sans-serif;
    background: var(--bg);
    color: var(--text);
}

/* 컨테이너 */
.wrap {
    max-width: 1100px;
    margin: 28px auto 64px;
    padding: 0 18px;
}

/* 헤더 */
.header h1 {
    margin: 0;
    font-size: clamp(22px, 2.4vw, 34px);
    letter-spacing: -0.02em;
}
.sub {
    margin: 6px 0 12px;
    color: var(--muted);
}

/* 탭 */
.tabs {
    display: flex;
    gap: 8px;
    margin-top: 8px;
}
.tab {
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: #fff;
    color: #334155;
    cursor: pointer;
}
.tab.is-active {
    background: #eef2ff;
    border-color: #c7d2fe;
    color: #312e81;
}

/* 2단 그리드 */
.grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 18px;
    margin-top: 18px;
}
@media (max-width: 980px) {
    .grid {
        grid-template-columns: 1fr;
    }
}

/* 카드 공통 */
.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 18px;
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.06);
}
.panel-title {
    margin: 0 0 10px;
}

/* 필드/입력 */
.fields {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
}
@media (max-width: 640px) {
    .fields {
        grid-template-columns: 1fr;
    }
}
.field {
    display: grid;
    gap: 6px;
}
.label {
    font-weight: 700;
}
.help {
    color: var(--muted);
    font-size: 12px;
}

.input-unit {
    display: flex;
    align-items: center;
    gap: 8px;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 10px 12px;
    background: #fff;
}
.input-unit input {
    flex: 1;
    border: none;
    outline: none;
    font-size: 16px;
    color: #111827;
}
.unit {
    color: #64748b;
    flex-shrink: 0;
}

/* 버튼 */
.actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 12px;
}
.btn {
    padding: 12px 16px;
    border-radius: 12px;
    font-weight: 800;
    border: 1px solid transparent;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s, transform 0.06s;
}
.btn.primary {
    background: var(--primary);
    color: #fff;
}
.btn.primary:hover {
    background: var(--primary-600);
}
.btn.ghost {
    background: #fff;
    color: #111827;
    border-color: var(--border);
}
.btn.ghost:hover {
    border-color: #cbd5e1;
}
.btn:active {
    transform: translateY(1px);
}

.note {
    color: var(--muted);
    font-size: 12px;
    margin-top: 8px;
}

/* 결과 카드 */
.result-title {
    margin: 4px 0 12px;
}
.hidden {
    display: none;
}

/* KPI */
.kpis {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}
@media (max-width: 540px) {
    .kpis {
        grid-template-columns: 1fr;
    }
}
.kpi {
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 12px;
    background: #fafafa;
}
.kpi-label {
    color: var(--muted);
    font-size: 12px;
}
.kpi strong {
    display: block;
    margin-top: 6px;
    font-size: 22px;
}

/* pill(세율/절감세액) */
.pill {
    margin-top: 14px;
    background: var(--gradient);
    color: #fff;
    border-radius: 16px;
    padding: 16px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    animation: fadeIn 0.4s ease both;
}
@media (max-width: 540px) {
    .pill {
        grid-template-columns: 1fr;
    }
}
.pill-label {
    opacity: 0.85;
    font-size: 13px;
}
.pill b {
    display: block;
    margin-top: 4px;
    font-size: 26px;
}

/* 표 */
.table-wrap {
    margin-top: 14px;
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: auto;
}
.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}
.table thead th {
    position: sticky;
    top: 0;
    background: #f8fafc;
    z-index: 1;
    text-align: left;
    padding: 10px;
    color: #334155;
    border-bottom: 1px solid var(--border);
}
.table tbody td {
    padding: 10px;
    border-bottom: 1px solid var(--border);
}
.table tbody tr:nth-child(odd) {
    background: #fcfcff;
}

/* 패널 전환 */
.panel {
    display: none;
}
.panel.is-active {
    display: contents;
} /* 그리드 영역 그대로 차지 */
.result {
    animation: fadeIn 0.4s ease both;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}