:root {
    --bg-primary: #121212;
    --bg-secondary: #1e1e1e;
    --bg-tertiary: #2d2d2d;
    --text-primary: #e0e0e0;
    --text-secondary: #b0b0b0;
    --text-muted: #888888;
    --accent-primary: #76b900;
    --accent-secondary: #4a9eff;
    --accent-success: #4caf50;
    --accent-warning: #ff9800;
    --accent-danger: #f44336;
    --border-color: #404040;
    --shadow-color: rgba(0, 0, 0, 0.5);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.4;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: all 0.3s ease;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

header {
    background: linear-gradient(135deg, #1a2332, #2d4a3d);
    color: var(--text-primary);
    text-align: center;
    padding: 30px 20px;
    border-radius: 12px;
    margin-bottom: 20px;
    box-shadow: 0 4px 20px var(--shadow-color);
    border: 1px solid var(--border-color);
}

header h1 {
    font-size: 2.2em;
    margin-bottom: 8px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
}

.subtitle {
    font-size: 1.1em;
    opacity: 0.9;
    color: var(--text-secondary);
}

.stock-price {
    font-size: 1.8em;
    color: var(--accent-success);
    font-weight: bold;
    margin: 15px 0;
    background: rgba(76, 175, 80, 0.1);
    padding: 10px;
    border-radius: 8px;
    border: 1px solid rgba(76, 175, 80, 0.3);
}

/* 다크 테마 엑셀 스타일 테이블 */
.excel-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-secondary);
    margin: 20px 0;
    box-shadow: 0 4px 20px var(--shadow-color);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.excel-table th {
    background: linear-gradient(135deg, #2c5aa0, #1e3a5f);
    color: var(--text-primary);
    padding: 12px 15px;
    text-align: left;
    font-weight: 600;
    border: 1px solid #1e3a5f;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.5);
}

.excel-table td {
    padding: 10px 15px;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.excel-table tr:nth-child(even) td {
    background: var(--bg-tertiary);
}

.excel-table tr:hover td {
    background: rgba(76, 175, 80, 0.1);
    transition: background 0.3s ease;
}

.number-cell {
    text-align: right;
    font-weight: 600;
    color: var(--accent-secondary);
}

.positive {
    color: var(--accent-success);
    font-weight: bold;
}

.negative {
    color: var(--accent-danger);
    font-weight: bold;
}

.section {
    background: var(--bg-secondary);
    margin-bottom: 25px;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 4px 20px var(--shadow-color);
    border-left: 4px solid var(--accent-primary);
    border: 1px solid var(--border-color);
}

.section h2 {
    color: var(--text-primary);
    font-size: 1.6em;
    margin-bottom: 20px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--border-color);
}

.chart-container {
    position: relative;
    height: 400px;
    margin: 20px 0;
    background: var(--bg-tertiary);
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 2px 15px var(--shadow-color);
    border: 1px solid var(--border-color);
}

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

.kpi-card {
    background: var(--bg-tertiary);
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 15px var(--shadow-color);
    border-left: 4px solid var(--accent-success);
    text-align: center;
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.kpi-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px var(--shadow-color);
}

.kpi-value {
    font-size: 2.2em;
    font-weight: bold;
    color: var(--accent-secondary);
    margin: 10px 0;
    text-shadow: 1px 1px 3px rgba(0,0,0,0.5);
}

.kpi-label {
    color: var(--text-secondary);
    font-size: 0.9em;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.risk-table {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin: 20px 0;
}

.risk-column {
    background: var(--bg-tertiary);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 15px var(--shadow-color);
    border: 1px solid var(--border-color);
}

.risk-header {
    padding: 15px;
    font-weight: bold;
    text-align: center;
    color: var(--text-primary);
    text-shadow: 1px 1px 2px rgba(0,0,0,0.5);
}

.risk-header.negative {
    background: linear-gradient(135deg, #d32f2f, #b71c1c);
}

.risk-header.positive {
    background: linear-gradient(135deg, #388e3c, #2e7d32);
}

.risk-content {
    padding: 20px;
    background: var(--bg-secondary);
}

.risk-item {
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

.risk-item:last-child {
    border-bottom: none;
}

.highlight-box {
    background: linear-gradient(135deg, rgba(76, 175, 80, 0.1), rgba(74, 158, 255, 0.1));
    border: 1px solid rgba(76, 175, 80, 0.3);
    border-radius: 12px;
    padding: 20px;
    margin: 20px 0;
    box-shadow: 0 2px 10px var(--shadow-color);
}

.tab-container {
    margin: 20px 0;
}

.tab-buttons {
    display: flex;
    background: var(--bg-tertiary);
    border-radius: 12px 12px 0 0;
    overflow: hidden;
    border: 1px solid var(--border-color);
    border-bottom: none;
}

.tab-button {
    flex: 1;
    padding: 12px 20px;
    background: var(--bg-tertiary);
    border: none;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
    color: var(--text-secondary);
    border-right: 1px solid var(--border-color);
}

.tab-button:last-child {
    border-right: none;
}

.tab-button.active {
    background: linear-gradient(135deg, #2c5aa0, #1e3a5f);
    color: var(--text-primary);
    text-shadow: 1px 1px 2px rgba(0,0,0,0.5);
}

.tab-button:hover:not(.active) {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.tab-content {
    background: var(--bg-secondary);
    padding: 25px;
    border-radius: 0 0 12px 12px;
    box-shadow: 0 4px 15px var(--shadow-color);
    border: 1px solid var(--border-color);
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
}

.tab-pane h3 {
    color: var(--text-primary);
    margin-bottom: 15px;
}

footer {
    text-align: center;
    padding: 25px;
    color: var(--text-muted);
    border-top: 1px solid var(--border-color);
    margin-top: 30px;
    background: var(--bg-secondary);
    border-radius: 12px;
    box-shadow: 0 2px 10px var(--shadow-color);
}

/* 스크롤바 다크 테마 */
::-webkit-scrollbar {
    width: 12px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 6px;
    border: 2px solid var(--bg-primary);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--border-color);
}

/* 선택 텍스트 스타일 */
::selection {
    background: rgba(76, 175, 80, 0.3);
    color: var(--text-primary);
}

/* 링크 스타일 */
a {
    color: var(--accent-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--accent-primary);
}

/* 리스트 스타일 */
ul {
    padding-left: 20px;
}

li {
    margin-bottom: 8px;
    color: var(--text-primary);
}

strong {
    color: var(--text-primary);
    font-weight: 600;
}

@media (max-width: 768px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }

    .risk-table {
        grid-template-columns: 1fr;
    }

    .tab-buttons {
        flex-direction: column;
    }

    .excel-table {
        font-size: 0.9em;
    }

    .excel-table th,
    .excel-table td {
        padding: 8px 10px;
    }

    .container {
        padding: 10px;
    }
}

/* 다크 테마 차트 스타일 */
.chart-container canvas {
    filter: brightness(1.1) contrast(1.1);
}