:root {
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --sidebar-bg: #1e293b;
    --main-bg: #f8fafc;
    --card-bg: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --accent-up: #10b981;
    --accent-down: #ef4444;
    --sidebar-text: #f1f5f9;
}

[data-theme='dark'] {
    --sidebar-bg: #0f172a;
    --main-bg: #1e293b;
    --card-bg: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --sidebar-text: #f1f5f9;
}

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

body {
    font-family: 'Pretendard', sans-serif;
    background-color: var(--main-bg);
    color: var(--text-primary);
    transition: all 0.3s ease;
    height: 100vh;
}

.app-container {
    display: flex;
    height: 100vh;
}

/* Sidebar Styling */
.sidebar {
    width: 260px;
    background-color: var(--sidebar-bg);
    color: var(--sidebar-text);
    padding: 2rem;
    display: flex;
    flex-direction: column;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 3rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.sidebar nav ul {
    list-style: none;
}

.sidebar nav ul li {
    margin-bottom: 1rem;
}

.sidebar nav ul li a {
    color: var(--sidebar-text);
    text-decoration: none;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 12px;
    border-radius: 8px;
    transition: 0.2s;
}

.sidebar nav ul li.active a, .sidebar nav ul li a:hover {
    background-color: var(--primary);
}

.sidebar-footer {
    margin-top: auto;
}

#theme-toggle {
    width: 100%;
    padding: 10px;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #fff;
    border-radius: 8px;
    cursor: pointer;
}

/* Main Content Styling */
.main-content {
    flex: 1;
    padding: 2.5rem;
    overflow-y: auto;
}

header {
    margin-bottom: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header h1 {
    font-size: 1.8rem;
    font-weight: 700;
}

.summary-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 16px;
    box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    transition: transform 0.2s;
}

.card:hover {
    transform: translateY(-5px);
}

.card h3 {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.card p {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 8px;
}

.trend {
    font-size: 0.9rem;
    font-weight: 600;
}

.trend.up { color: var(--accent-up); }
.trend.down { color: var(--accent-down); }

/* Charts and Table */
.charts-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.chart-container {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 16px;
}

.chart-container h3 { margin-bottom: 1.5rem; font-size: 1.1rem; }

.asset-list {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 16px;
}

.asset-list h3 { margin-bottom: 1.5rem; }

.table-wrapper {
    overflow-x: auto;
}

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

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid #e2e8f0;
}

th {
    font-weight: 600;
    color: var(--text-secondary);
    background: rgba(0,0,0,0.02);
}

tr:hover {
    background: rgba(0,0,0,0.01);
}