/* ========================================
   Nanobanana V4.2 - Premium UI & Interaction
   ======================================== */
:root {
    /* Brand Colors */
    --nb-yellow: #FEE500;
    --nb-yellow-hover: #FADA00;
    --nb-dark: #191919;
    --nb-dark-gray: #333333;
    --nb-gray-400: #8E8E8E;
    --nb-gray-200: #E6E6E6;
    --nb-gray-100: #F2F2F2;
    --nb-bg: #F9F9F9;
    --nb-white: #FFFFFF;

    /* Layout & Spacing */
    --nb-radius-lg: 16px;
    --nb-radius-md: 12px;
    --nb-radius-sm: 8px;
    --nb-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
    --nb-shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.08);

    /* Fonts */
    --nb-font-family: 'Apple SD Gothic Neo', 'Malgun Gothic', 'Dotum', sans-serif;
}

/* Base Styles */
body {
    background-color: var(--nb-bg);
    color: var(--nb-dark);
    font-family: var(--nb-font-family);
    margin: 0;
    line-height: 1.5;
    letter-spacing: -0.03em;
    -webkit-font-smoothing: antialiased;
}

/* ========================================
   [CRITICAL FIX] Dropdown Layering & Z-Index
   ======================================== */

/* 1. 필터가 포함된 카드가 하단 카드들보다 무조건 위로 오게 설정 */
.card:has(#filter-form),
#filter-form-container {
    position: relative !important;
    z-index: 1000 !important;
    /* 아래 KPI 카드들보다 높은 레이어 */
}

/* 2. 카드 내부에서 드롭다운이 밖으로 튀어나올 수 있게 허용 */
.card,
.nb-card,
.card-body {
    overflow: visible !important;
    /* 매우 중요: hidden일 경우 드롭다운이 잘림 */
}

/* 3. 커스텀 멀티셀렉트 드롭다운 스타일 */
.nb-multiselect {
    position: relative;
    width: 100%;
}

.nb-multiselect-dropdown {
    position: absolute !important;
    top: 100% !important;
    left: 0 !important;
    width: 100% !important;
    max-height: 300px;
    overflow-y: auto;
    background: var(--nb-white) !important;
    border: 1px solid var(--nb-gray-200) !important;
    border-radius: var(--nb-radius-md);
    margin-top: 8px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15) !important;
    z-index: 9999 !important;
    /* 페이지 내 어떤 요소보다 최상단 */
    display: none;
}

.nb-multiselect-dropdown.show {
    display: block !important;
}

/* 4. 필터 아래의 행(Row)들은 레이어 순서를 낮게 유지 */
.row.g-3,
.row.g-4 {
    position: relative;
    z-index: 1;
}

/* ========================================
   Tables (Sticky Headers & Columns)
   ======================================== */
.nb-table-container {
    background: var(--nb-white);
    border-radius: var(--nb-radius-lg);
    overflow: auto;
    /* 테이블 내부 스크롤은 허용 */
    box-shadow: var(--nb-shadow);
}

.table.nb-table thead th {
    background-color: var(--nb-gray-100);
    color: var(--nb-dark-gray);
    font-weight: 700;
    font-size: 0.75rem;
    padding: 16px;
    border: none;
    white-space: nowrap;
    position: sticky;
    top: 0;
    z-index: 10;
}

.table.nb-table tbody td {
    padding: 16px;
    vertical-align: middle;
    border-bottom: 1px solid var(--nb-gray-100);
    font-size: 0.9rem;
}

.table.nb-table tbody tr:hover {
    background-color: #FFFDF0;
}

/* ========================================
   Cards & Buttons
   ======================================== */
.card {
    background: var(--nb-white);
    border: none !important;
    border-radius: var(--nb-radius-lg);
    box-shadow: var(--nb-shadow);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    margin-bottom: 24px;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--nb-shadow-hover);
}

.btn {
    border-radius: var(--nb-radius-md);
    font-weight: 600;
    padding: 12px 20px;
    transition: all 0.2s;
    border: none;
}

.btn-primary {
    background-color: var(--nb-yellow) !important;
    color: var(--nb-dark) !important;
}

.btn-primary:hover {
    background-color: var(--nb-yellow-hover) !important;
    box-shadow: 0 4px 12px rgba(254, 229, 0, 0.4) !important;
}

/* ========================================
   Forms & Inputs
   ======================================== */
.form-control,
.form-select {
    border-radius: var(--nb-radius-md);
    border: 1px solid var(--nb-gray-200);
    padding: 12px 16px;
    background-color: var(--nb-gray-100);
}

.form-control:focus,
.form-select:focus {
    background-color: var(--nb-white);
    border-color: var(--nb-yellow) !important;
    box-shadow: 0 0 0 3px rgba(254, 229, 0, 0.25) !important;
}

/* Step Badge */
.step-badge {
    background: var(--nb-yellow);
    color: var(--nb-dark);
    font-weight: 800;
    font-size: 0.75rem;
    padding: 4px 14px;
    border-radius: 100px;
}

/* ========================================
   KPI & Report Styling
   ======================================== */
.report-summary-value {
    font-size: 3.5rem;
    font-weight: 850;
    letter-spacing: -0.02em;
}

.kpi-card-value {
    font-size: 2.5rem;
    font-weight: 800;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--nb-gray-100);
}

::-webkit-scrollbar-thumb {
    background: var(--nb-gray-400);
    border-radius: 10px;
}