:root {
    --bg-main: #0a0e27;
    --bg-secondary: #1a1f3a;
    --bg-card: rgba(26, 31, 58, 0.8);
    --primary: #667eea;
    --primary-hover: #764ba2;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --text-main: #e0e0e0;
    --text-secondary: #aaa;
    --border: rgba(255, 255, 255, 0.1);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--bg-main);
    color: var(--text-main);
    line-height: 1.6;
    min-height: 100vh;
    padding: 20px;
}

#app {
    max-width: 1400px;
    margin: 0 auto;
}

.header {
    text-align: center;
    margin-bottom: 40px;
    padding: 30px 0;
}

.header h1 {
    font-size: 2.5em;
    font-weight: 800;
    margin-bottom: 10px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

/* Summary Card */
.summary-card {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.summary-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    text-align: center;
    backdrop-filter: blur(10px);
}

.summary-label {
    display: block;
    color: var(--text-secondary);
    font-size: 0.9em;
    margin-bottom: 8px;
}

.summary-value {
    display: block;
    font-size: 1.8em;
    font-weight: 700;
    color: var(--primary);
}

/* Loading */
.loading {
    text-align: center;
    padding: 60px 20px;
    display: none;
}

.loading.show {
    display: block;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Error Message */
.error-message {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--danger);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 30px;
    color: #fca5a5;
    text-align: center;
}

/* Exchange Cards */
.exchanges-container {
    display: grid;
    gap: 20px;
    margin-bottom: 40px;
}

.exchange-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

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

.exchange-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.exchange-name {
    font-size: 1.3em;
    font-weight: 700;
    color: var(--text-main);
}

.exchange-status {
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.85em;
    font-weight: 600;
}

.exchange-status.success {
    background: rgba(16, 185, 129, 0.2);
    color: var(--success);
}

.exchange-status.error {
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger);
}

.balances-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 12px;
}

.balance-item {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 12px;
}

.balance-asset {
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 4px;
}

.balance-amount {
    font-size: 1.1em;
    color: var(--primary);
    font-weight: 700;
}

.balance-details {
    font-size: 0.85em;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* Assets Summary */
.assets-container {
    margin-top: 40px;
}

.assets-container h2 {
    font-size: 1.8em;
    margin-bottom: 20px;
    color: var(--text-main);
}

.assets-list {
    display: grid;
    gap: 16px;
}

.asset-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    backdrop-filter: blur(10px);
}

.asset-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.asset-name {
    font-size: 1.3em;
    font-weight: 700;
    color: var(--text-main);
}

.asset-total {
    font-size: 1.5em;
    font-weight: 700;
    color: var(--primary);
}

.exchanges-list {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 12px;
}

.exchange-badge {
    background: rgba(102, 126, 234, 0.2);
    border: 1px solid var(--primary);
    border-radius: 6px;
    padding: 6px 12px;
    font-size: 0.85em;
    color: var(--primary);
}

.exchange-badge .amount {
    font-weight: 600;
    margin-left: 6px;
}

/* Footer */
.footer {
    margin-top: 40px;
    text-align: center;
    padding: 20px 0;
}

.btn-refresh {
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    border: none;
    border-radius: 12px;
    padding: 14px 28px;
    color: white;
    font-size: 1em;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-refresh:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.btn-refresh:active {
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 768px) {
    .summary-card {
        grid-template-columns: 1fr;
    }

    .balances-grid {
        grid-template-columns: 1fr;
    }

    .header h1 {
        font-size: 2em;
    }
}