/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --primary: #2563eb;
    --primary-light: #eff6ff;
    --primary-dark: #1d4ed8;
    --success: #059669;
    --success-light: #ecfdf5;
    --warning: #d97706;
    --bg: #f1f5f9;
    --surface: #ffffff;
    --surface-2: #f8fafc;
    --border: #e2e8f0;
    --text: #0f172a;
    --text-2: #334155;
    --text-muted: #64748b;
    --text-faint: #94a3b8;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 1px 4px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --radius: 10px;
    --radius-sm: 6px;
}

body {
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
    padding: 20px;
    min-height: 100vh;
}

.app {
    max-width: 1680px;
    margin: 0 auto;
}

/* ===== HEADER ===== */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 20px;
    background: var(--surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 16px;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 14px;
}

.header-badge {
    background: var(--primary);
    color: white;
    font-size: 0.65rem;
    font-weight: 700;
    padding: 4px 8px;
    border-radius: 4px;
    letter-spacing: 0.03em;
    white-space: nowrap;
}

.header-title {
    font-size: 1.1rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--text);
}

.header-sub {
    font-size: 0.72rem;
    color: var(--text-muted);
    margin-top: 1px;
}

.header-actions {
    display: flex;
    gap: 8px;
    align-items: center;
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.15s;
    white-space: nowrap;
}

.btn-primary {
    background: var(--primary);
    color: white;
}
.btn-primary:hover { background: var(--primary-dark); }

.btn-ghost {
    background: var(--surface);
    color: var(--text-2);
    border: 1px solid var(--border);
}
.btn-ghost:hover { background: var(--surface-2); }

/* ===== EMPTY STATE ===== */
.empty-state {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 65vh;
    background: var(--surface);
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    transition: all 0.25s;
}

.empty-state.drag-active {
    border-color: var(--primary);
    background: var(--primary-light);
    transform: scale(1.005);
}

.empty-inner {
    text-align: center;
    padding: 40px 20px;
    max-width: 480px;
}

.empty-icon {
    width: 80px;
    height: 80px;
    background: var(--primary-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: var(--primary);
}

.empty-inner h2 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 10px;
}

.empty-inner p {
    font-size: 0.88rem;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.empty-secure {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 0.75rem !important;
    color: var(--success) !important;
    background: var(--success-light);
    padding: 5px 12px;
    border-radius: 20px;
    margin-top: 12px;
}

.empty-format {
    margin-top: 24px;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    text-align: left;
}

.format-label {
    display: block;
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 8px;
}

.format-cols {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.format-cols span {
    font-size: 0.7rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 2px 8px;
    color: var(--text-2);
    font-family: monospace;
}

/* ===== KPI SECTION ===== */
.kpi-section {
    display: flex;
    gap: 8px;
    align-items: stretch;
    margin-bottom: 16px;
}

.kpi-divider {
    width: 1px;
    background: var(--border);
    margin: 0 4px;
}

.kpi-card {
    background: var(--surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    transition: transform 0.2s, box-shadow 0.2s;
}

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

.kpi-card.mini {
    flex: 0.75;
    padding: 10px 12px;
    min-width: 80px;
}

.kpi-card.large {
    flex: 1.25;
    padding: 12px 16px;
    min-width: 120px;
}

.kpi-card.grey { background: var(--surface-2); }
.kpi-card.green { background: var(--success-light); }

.kpi-label {
    font-size: 0.67rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 4px;
}

.kpi-value {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--text-2);
}

.kpi-big {
    font-size: 1.7rem;
    font-weight: 900;
    color: var(--text);
    letter-spacing: -0.04em;
    line-height: 1;
}

.kpi-unit {
    font-size: 0.72rem;
    color: var(--text-muted);
    font-weight: 600;
    margin-top: 2px;
}

/* ===== CHARTS SECTION ===== */
.charts-section {
    background: var(--surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 20px;
    margin-bottom: 16px;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 18px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}

.section-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text);
}

.toggle-group {
    display: flex;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.toggle-btn {
    background: transparent;
    border: none;
    padding: 6px 16px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.15s;
}

.toggle-btn.active {
    background: var(--primary);
    color: white;
}

.charts-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.chart-card {
    background: var(--surface-2);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    padding: 16px;
}

.chart-title {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-muted);
    margin-bottom: 12px;
    padding-left: 10px;
    border-left: 3px solid var(--primary);
}

.chart-wrap {
    position: relative;
    height: 230px;
}

/* ===== TABLE SECTION ===== */
.table-section {
    background: var(--surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 16px;
}

.filter-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    margin-bottom: 10px;
    flex-wrap: wrap;
}

.filter-group {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.filter-group select {
    padding: 6px 10px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    background: white;
    color: var(--text);
    cursor: pointer;
    min-width: 110px;
}

.filter-group select:focus { outline: none; border-color: var(--primary); }

.tool-group {
    display: flex;
    gap: 8px;
    align-items: center;
}

.search-wrap {
    display: flex;
    align-items: center;
    gap: 6px;
    background: white;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0 10px;
    color: var(--text-muted);
}

.search-wrap input {
    border: none;
    outline: none;
    font-size: 0.75rem;
    padding: 6px 0;
    width: 180px;
    color: var(--text);
}

.table-info {
    font-size: 0.72rem;
    color: var(--text-muted);
    padding: 4px 2px 8px;
}

.table-wrap {
    overflow-x: auto;
    max-height: 460px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.74rem;
}

thead th {
    background: var(--surface-2);
    padding: 9px 10px;
    text-align: left;
    position: sticky;
    top: 0;
    z-index: 10;
    border-bottom: 2px solid var(--border);
    font-weight: 700;
    color: var(--text-2);
    white-space: nowrap;
}

tbody tr {
    transition: background 0.1s;
    animation: rowFade 0.25s ease forwards;
}

tbody tr:hover { background: var(--surface-2); }

tbody td {
    padding: 7px 10px;
    border-bottom: 1px solid var(--border);
    color: var(--text-2);
    white-space: nowrap;
}

tbody tr:last-child td { border-bottom: none; }

.col-domain { color: var(--text-muted) !important; }
.col-part { font-weight: 700 !important; color: var(--text) !important; }
.col-cost { font-family: monospace; text-align: right; }
.col-actual { font-weight: 700; color: var(--primary); font-family: monospace; text-align: right; }

/* ===== STATUS TAGS ===== */
.tag {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 38px;
    padding: 2px 7px;
    border-radius: 4px;
    font-size: 0.65rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.15s;
    user-select: none;
}

.tag:hover { filter: brightness(0.92); transform: scale(1.05); }

.tag-new { background: #fee2e2; color: #991b1b; }
.tag-common { background: #dcfce7; color: #166534; }
.tag-none { background: #f1f5f9; color: #94a3b8; }

/* ===== ANIMATIONS ===== */
@keyframes rowFade {
    from { opacity: 0; transform: translateY(3px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ===== DROP ZONE OVERLAY ===== */
.app.drag-active .empty-state {
    border-color: var(--primary);
    background: var(--primary-light);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1100px) {
    .charts-grid { grid-template-columns: 1fr; }
    .kpi-section { flex-wrap: wrap; }
    .kpi-divider { display: none; }
}

@media (max-width: 768px) {
    body { padding: 10px; }
    .header { flex-direction: column; gap: 12px; align-items: flex-start; }
    .filter-bar { flex-direction: column; align-items: stretch; }
    .filter-group { flex-wrap: wrap; }
    .tool-group { flex-wrap: wrap; }
    .search-wrap input { width: 140px; }
}