/* ============================================
   DART 장내매수 모니터링 - 디자인 시스템
   금융 대시보드 화이트 테마
   ============================================ */

/* --- CSS Variables --- */
:root {
    /* Colors - White theme with emerald accent */
    --bg-primary: #f5f7fa;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f0f2f5;
    --bg-card: #ffffff;
    --bg-card-hover: #f8f9fb;

    --border-primary: #e2e8f0;
    --border-hover: #cbd5e1;
    --border-accent: rgba(16, 185, 129, 0.4);

    --text-primary: #1a202c;
    --text-secondary: #4a5568;
    --text-tertiary: #718096;
    --text-muted: #a0aec0;

    --accent-emerald: #059669;
    --accent-emerald-dim: rgba(5, 150, 105, 0.1);
    --accent-emerald-glow: rgba(5, 150, 105, 0.2);
    --accent-gold: #d97706;
    --accent-gold-dim: rgba(217, 119, 6, 0.1);
    --accent-blue: #2563eb;
    --accent-blue-dim: rgba(37, 99, 235, 0.1);
    --accent-purple: #7c3aed;
    --accent-purple-dim: rgba(124, 58, 237, 0.1);

    --kospi-color: #2563eb;
    --kosdaq-color: #d97706;

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);

    /* Layout */
    --header-height: 64px;
    --sidebar-width: 320px;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-base: 16px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Border radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
}

/* --- Reset & Base --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow: hidden;
}

/* --- Header --- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-primary);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 28px;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 18px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo h1 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.header-subtitle {
    color: var(--text-tertiary);
    font-size: 0.9rem;
    font-weight: 400;
    padding-left: 18px;
    border-left: 1px solid var(--border-primary);
}

.header-right {
    display: flex;
    align-items: center;
}

.update-info {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-tertiary);
}

.update-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent-emerald);
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(5, 150, 105, 0.4); }
    50% { opacity: 0.7; box-shadow: 0 0 0 6px rgba(5, 150, 105, 0); }
}

/* --- Layout --- */
.layout {
    display: flex;
    margin-top: var(--header-height);
    height: calc(100vh - var(--header-height));
}

/* --- Sidebar --- */
.sidebar {
    width: var(--sidebar-width);
    min-width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-primary);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: transform var(--transition-slow);
}

.sidebar-header {
    padding: 18px 20px;
    border-bottom: 1px solid var(--border-primary);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.sidebar-header h2 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.sidebar-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px;
    border-radius: var(--radius-sm);
    transition: color var(--transition-fast);
}

.sidebar-toggle:hover {
    color: var(--text-primary);
}

/* --- Calendar --- */
.calendar-container {
    padding: 14px;
}

.calendar-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 4px 4px 14px;
}

.cal-nav-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-sm);
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.cal-nav-btn:hover {
    background: var(--border-primary);
    color: var(--text-primary);
}

.cal-nav-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.cal-nav-btn:disabled:hover {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}

.cal-month-label {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.calendar-weekdays {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 2px;
    padding: 0 2px 8px;
    border-bottom: 1px solid var(--border-primary);
    margin-bottom: 8px;
}

.cal-weekday {
    text-align: center;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    padding: 6px 0;
}

.cal-weekday.sun {
    color: #dc2626;
}

.cal-weekday.sat {
    color: var(--accent-blue);
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 3px;
    padding: 0 2px;
}

.cal-day {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    aspect-ratio: 1;
    border-radius: var(--radius-sm);
    cursor: default;
    transition: all var(--transition-fast);
    border: 2px solid transparent;
    gap: 2px;
}

.cal-day-number {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-tertiary);
    line-height: 1;
    font-variant-numeric: tabular-nums;
}

.cal-day.other-month .cal-day-number {
    color: var(--text-muted);
    opacity: 0.4;
}

.cal-day.sun .cal-day-number {
    color: #dc2626;
    opacity: 0.6;
}

.cal-day.sat .cal-day-number {
    color: var(--accent-blue);
    opacity: 0.6;
}

.cal-day.today {
    background: var(--bg-tertiary);
    border-color: var(--border-hover);
}

.cal-day.today .cal-day-number {
    color: var(--text-primary);
    font-weight: 700;
}

/* Date with data */
.cal-day.has-data {
    cursor: pointer;
    background: var(--accent-emerald-dim);
}

.cal-day.has-data .cal-day-number {
    color: var(--text-primary);
    font-weight: 700;
}

.cal-day.has-data:hover {
    background: var(--accent-emerald-glow);
    border-color: var(--accent-emerald);
    transform: scale(1.08);
}

.cal-day-count {
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--accent-emerald);
    line-height: 1;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.cal-day.has-data .cal-day-count {
    opacity: 1;
}

.cal-day.has-data.zero-data .cal-day-count {
    color: var(--text-muted);
    opacity: 0.6;
}

/* Selected state */
.cal-day.selected {
    background: var(--accent-emerald);
    border-color: var(--accent-emerald);
    box-shadow: 0 2px 8px rgba(5, 150, 105, 0.3);
}

.cal-day.selected .cal-day-number {
    color: #ffffff;
    font-weight: 700;
}

.cal-day.selected .cal-day-count {
    color: rgba(255, 255, 255, 0.85);
}

.cal-day.selected:hover {
    transform: none;
}

/* --- Main Content --- */
.main {
    flex: 1;
    overflow-y: auto;
    padding: 24px 28px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.main::-webkit-scrollbar {
    width: 6px;
}

.main::-webkit-scrollbar-track {
    background: transparent;
}

.main::-webkit-scrollbar-thumb {
    background: var(--border-primary);
    border-radius: 6px;
}

/* --- Stats Cards --- */
.stats-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    padding: 20px 22px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
}

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

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.stat-icon-total {
    background: var(--accent-emerald-dim);
    color: var(--accent-emerald);
}

.stat-icon-kospi {
    background: var(--accent-blue-dim);
    color: var(--accent-blue);
}

.stat-icon-kosdaq {
    background: var(--accent-gold-dim);
    color: var(--accent-gold);
}

.stat-content {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    font-weight: 500;
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    font-variant-numeric: tabular-nums;
    line-height: 1.2;
}

/* --- Toolbar --- */
.toolbar {
    display: flex;
    align-items: center;
    gap: 16px;
}

.search-box {
    position: relative;
    flex: 1;
    max-width: 360px;
}

.search-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

.search-box input {
    width: 100%;
    padding: 11px 14px 11px 42px;
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: 0.95rem;
    outline: none;
    transition: all var(--transition-fast);
}

.search-box input::placeholder {
    color: var(--text-muted);
}

.search-box input:focus {
    border-color: var(--accent-emerald);
    box-shadow: 0 0 0 3px var(--accent-emerald-dim);
}

.selected-date-label {
    font-size: 0.95rem;
    color: var(--text-tertiary);
    font-weight: 600;
    margin-left: auto;
}

/* --- Data Table --- */
.table-container {
    flex: 1;
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    overflow: auto;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-sm);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table thead {
    position: sticky;
    top: 0;
    z-index: 10;
}

.data-table th {
    background: var(--bg-tertiary);
    padding: 14px 16px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-align: left;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    border-bottom: 2px solid var(--border-primary);
    white-space: nowrap;
    user-select: none;
}

.data-table th.sortable {
    cursor: pointer;
    transition: color var(--transition-fast);
}

.data-table th.sortable:hover {
    color: var(--accent-emerald);
}

.data-table th.sorted {
    color: var(--accent-emerald);
}

.sort-arrow {
    display: inline-block;
    margin-left: 4px;
    opacity: 0.3;
    transition: opacity var(--transition-fast);
}

.data-table th.sorted .sort-arrow {
    opacity: 1;
}

.data-table th.num {
    text-align: right;
}

.data-table td {
    padding: 12px 16px;
    font-size: 0.95rem;
    border-bottom: 1px solid var(--border-primary);
    color: var(--text-secondary);
    transition: background var(--transition-fast);
}

.data-table tbody tr {
    transition: background var(--transition-fast);
}

.data-table tbody tr:hover {
    background: var(--bg-tertiary);
}

.data-table tbody tr:hover td {
    color: var(--text-primary);
}

.data-table td.company-name {
    font-weight: 600;
    color: var(--text-primary);
}

.data-table td.num {
    text-align: right;
    font-variant-numeric: tabular-nums;
}

.data-table td.positive {
    color: #dc2626;
    font-weight: 600;
}

.data-table td.negative {
    color: var(--accent-blue);
    font-weight: 600;
}

.data-table td.date-col {
    color: var(--text-tertiary);
    font-size: 0.88rem;
}

.market-badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.02em;
}

.market-badge.kospi {
    background: var(--accent-blue-dim);
    color: var(--accent-blue);
}

.market-badge.kosdaq {
    background: var(--accent-gold-dim);
    color: var(--accent-gold);
}

/* --- Empty State --- */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    color: var(--text-muted);
    gap: 16px;
    flex: 1;
}

.empty-state p {
    text-align: center;
    font-size: 1rem;
    line-height: 1.6;
}

.no-results {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
    color: var(--text-muted);
}

.no-results p {
    font-size: 1rem;
}

/* --- Fade-in animation --- */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.3s ease forwards;
}

/* --- Mobile sidebar overlay --- */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.3);
    z-index: 49;
    backdrop-filter: blur(4px);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
    .stats-row {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .header-subtitle {
        display: none;
    }

    .sidebar {
        position: fixed;
        top: var(--header-height);
        left: 0;
        bottom: 0;
        z-index: 50;
        transform: translateX(-100%);
        box-shadow: var(--shadow-lg);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .sidebar-overlay.visible {
        display: block;
    }

    .sidebar-toggle {
        display: flex;
    }

    .header .sidebar-toggle {
        display: flex;
    }

    .stats-row {
        grid-template-columns: 1fr;
    }

    .main {
        padding: 16px;
    }

    .data-table th,
    .data-table td {
        padding: 10px 12px;
        font-size: 0.88rem;
    }
}

@media (max-width: 480px) {
    .stats-row {
        grid-template-columns: 1fr;
    }

    .toolbar {
        flex-direction: column;
        align-items: stretch;
    }

    .search-box {
        max-width: 100%;
    }

    .selected-date-label {
        margin-left: 0;
        text-align: center;
    }
}