:root {
    --primary: #2962ff;
    --primary-dark: #0039cb;
    --secondary: #00c853;
    --secondary-dark: #009624;
    --danger: #ff3d00;
    --danger-dark: #b22a00;
    --text: #212121;
    --text-light: #757575;
    --bg: #f5f5f5;
    --card-bg: #ffffff;
    --border: #e0e0e0;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    background-color: var(--card-bg);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand {
    color: var(--primary);
    font-weight: bold;
    text-decoration: none;
    font-size: 1.2rem;
}

nav ul {
    display: flex;
    list-style: none;
}

nav ul li {
    margin-left: 20px;
}

nav ul li a {
    text-decoration: none;
    color: var(--text-light);
    font-weight: 500;
    transition: color 0.3s;
}

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

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.card {
    background-color: var(--card-bg);
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    padding: 20px;
}

.card h2 {
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.2rem;
}

.exchange-selector {
    display: flex;
    gap: 10px;
    margin: 20px 0;
    overflow-x: auto;
    padding-bottom: 10px;
}

.exchange-btn {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 10px 15px;
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    transition: all 0.3s;
    white-space: nowrap;
}

.exchange-btn:hover {
    border-color: var(--primary);
}

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

.exchange-btn img {
    height: 20px;
    width: auto;
}

.tabs {
    display: flex;
    margin-bottom: 15px;
    border-bottom: 1px solid var(--border);
}

.tab-btn {
    padding: 8px 15px;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    color: var(--text-light);
    font-weight: 500;
}

.tab-btn.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

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

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

th, td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

th {
    font-weight: 600;
    color: var(--text-light);
    font-size: 0.9rem;
}

.chart-placeholder {
    height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #f9f9f9;
    border-radius: 6px;
    color: var(--text-light);
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: var(--text-light);
    font-size: 0.9rem;
}

.form-group input, .form-group select {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 1rem;
}

.side-toggle {
    display: flex;
    border: 1px solid var(--border);
    border-radius: 6px;
    overflow: hidden;
}

.side-btn {
    flex: 1;
    padding: 10px;
    border: none;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s;
}

.side-btn.buy {
    background-color: rgba(0,