/* Preev v6 Final - Redesigned */

:root[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: #1e293b;
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --border-color: #334155;
    --accent-primary: #10b981;
    --accent-danger: #ef4444;
    --accent-btc: #f7931a;
    --trend-up: #10b981;
    --trend-down: #ef4444;
}

:root[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-card: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --accent-primary: #10b981;
    --accent-danger: #ef4444;
    --accent-btc: #f7931a;
    --trend-up: #10b981;
    --trend-down: #ef4444;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    padding: 20px;
    transition: background 0.3s, color 0.3s;
}

.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 10px 15px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 20px;
    z-index: 1000;
    transition: transform 0.2s;
}

.theme-toggle:hover {
    transform: scale(1.1);
}

.container {
    max-width: 800px;
    margin: 0 auto;
}

.logo {
    font-size: 36px;
    text-align: center;
    margin-bottom: 10px;
}

.tagline {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 30px;
    font-size: 14px;
}

.price-display {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
    text-align: center;
}

.rate {
    font-size: 24px;
    font-weight: 600;
    color: var(--accent-primary);
    transition: color 0.3s;
}

/* Trend indicators */
.rate.trend-up {
    color: var(--trend-up);
}

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

.converter-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 30px;
}

.section-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.currency-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
    gap: 10px;
    margin-bottom: 15px;
}

.currency-btn {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    padding: 12px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    color: var(--text-primary);
}

.currency-btn:hover {
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}

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

.currency-btn.btc-highlight {
    border-color: var(--accent-btc);
}

.currency-btn.btc-highlight.active {
    background: var(--accent-btc);
    border-color: var(--accent-btc);
}

.amount-input {
    width: 100%;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    padding: 15px;
    border-radius: 8px;
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.amount-input:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.swap-arrow {
    text-align: center;
    font-size: 32px;
    color: var(--text-secondary);
    margin: 20px 0;
}

.provider-section {
    margin-top: 30px;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
}

/* COMPACT PROVIDER GRID */
.provider-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 10px;
}

.provider-checkbox {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
}

.provider-checkbox:hover:not(.disabled) {
    border-color: var(--accent-primary);
}

.provider-checkbox.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.provider-checkbox input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    flex-shrink: 0;
}

.provider-checkbox input[type="checkbox"]:disabled {
    cursor: not-allowed;
}

.provider-checkbox span {
    font-weight: 500;
    color: var(--text-primary);
    font-size: 14px;
}

.footer-info {
    text-align: center;
    margin-top: 20px;
    opacity: 0.6;
    font-size: 12px;
    color: var(--text-secondary);
}

.footer-info p {
    margin: 0;
}

/* Responsive */
@media (max-width: 600px) {
    .currency-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .provider-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .logo {
        font-size: 28px;
    }
    
    .rate {
        font-size: 20px;
    }
    
    .amount-input {
        font-size: 20px;
    }
    
    .converter-card {
        padding: 20px;
    }
}

@media (max-width: 400px) {
    .provider-grid {
        grid-template-columns: 1fr;
    }
}

/* Status Bar */
.status-bar {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px 20px;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 15px;
}

.status-label {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 14px;
}

.status-value {
    font-weight: 600;
    font-size: 14px;
    flex-grow: 1;
}

.refresh-btn {
    background: var(--accent-primary);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    font-size: 13px;
    transition: all 0.2s;
}

.refresh-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
}

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

@media (max-width: 600px) {
    .status-bar {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .refresh-btn {
        width: 100%;
    }
}