/* Base Styles */
:root {
    --primary-bg: #0f172a;
    --secondary-bg: #1e293b;
    --tertiary-bg: #334155;
    --primary-text: #f8fafc;
    --secondary-text: #94a3b8;
    --accent-green: #10b981;
    --accent-red: #ef4444;
    --accent-blue: #3b82f6;
    --border-color: #334155;
    --card-bg: #1e293b;
    --buy-bg: rgba(16, 185, 129, 0.1);
    --sell-bg: rgba(239, 68, 68, 0.1);
}

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

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

.container {
    display: grid;
    grid-template-rows: auto 1fr auto;
    min-height: 100vh;
}

/* Header Styles */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background-color: var(--secondary-bg);
    border-bottom: 1px solid var(--border-color);
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: bold;
}

.logo i {
    color: var(--accent-blue);
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: 1.5rem;
}

.main-nav a {
    color: var(--secondary-text);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: color 0.3s;
}

.main-nav a:hover {
    color: var(--primary-text);
}

.main-nav a.active {
    color: var(--accent-blue);
}

.user-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.btn {
    padding: 0.5rem 1rem;
    border-radius: 0.25rem;
    border: none;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-deposit {
    background-color: var(--accent-blue);
    color: white;
}

.btn-deposit:hover {
    background-color: #2563eb;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.user-profile img {
    border-radius: 50%;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--primary-text);
    font-size: 1.5rem;
    cursor: pointer;
}

/* Main Content Styles */
.main-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto auto;
    gap: 1.5rem;
    padding: 1.5rem;
    grid-template-areas:
        "market market"
        "pairs order"
        "book trades";
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.section-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

.time-frames button,
.book-options button,
.order-types button {
    background: none;
    border: none;
    color: var(--secondary-text);
    padding: 0.25rem 0.5rem;
    cursor: pointer;
    transition: all 0.3s;
}

.time-frames button.active,
.book-options button.active,
.order-types button.active {
    color: var(--accent-blue);
    background-color: rgba(59, 130, 246, 0.1);
    border-radius: 0.25rem;
}

/* Market Overview */
.market-overview {
    grid-area: market;
    background-color: var(--secondary-bg);
    border-radius: 0.5rem;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
}

.chart-container {
    height: 300px;
    width: 100%;
}

/* Trading Pairs */
.trading-pairs {
    grid-area: pairs;
    background-color: var(--secondary-bg);
    border-radius: 0.5rem;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
}

.search-box {
    display: flex;
    align-items: center;
    background-color: var(--primary-bg);
    border-radius: 0.25rem;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
}

.search-box input {
    background: none;
    border: none;
    color: var(--primary-text);
    outline: none;
    width: 150px;
}

.pairs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.pair-card {
    background-color: var(--card-bg);
    border-radius: 0.5rem;
    padding: 1rem;
    border: 1px solid var(--border-color);
    transition: transform 0.3s;
    cursor: pointer;
}

.pair-card:hover {
    transform: translateY(-3px);
}

.pair-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.pair-name {
    font-weight: 600;
}

.pair-price {
    font-size: 1.1rem;
    font-weight: 600;
}

.pair-change {
    display: flex;
    justify-content: space-between;
    font-size: 0.875rem;
    color: var(--secondary-text);
}

.change-positive {
    color: var(--accent-green);
}

.change-negative {
    color: var(--accent-red);
}

/* Order Form */
.order-form {
    grid-area: order;
    background-color: var(--secondary-bg);
    border-radius: 0.5rem;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
}

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

.form-tabs button {
    flex: 1;
    padding: 0.5rem;
    background: none;
    border: none;
    color: var(--secondary-text);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.form-tabs button.active {
    color: var(--primary-text);
    position: relative;
}

.form-tabs button.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 2px;
}

.buy-tab.active {
    color: var(--accent-green);
}

.buy-tab.active::after {
    background-color: var(--accent-green);
}

.sell-tab.active {
    color: var(--accent-red);
}

.sell-tab.active::after {
    background-color: var(--accent-red);
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--secondary-text);
    font-size: 0.875rem;
}

.form-group input {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--primary-bg);
    border: 1px solid var(--border-color);
    border-radius: 0.25rem;
    color: var(--primary-text);
    font-size: 1rem;
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent-blue);
}

.slider-container {
    margin: 1.5rem 0;
}

.slider {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--tertiary-bg);
    outline: none;
    -webkit-appearance: none;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent-blue);
    cursor: pointer;
}

.slider-labels {
    display: flex;
    justify-content: space-between;
    margin-top: 0.5rem;
    font-size: 0.75rem;
    color: var(--secondary-text);
}

.btn-buy {
    width: 100%;
    padding: 1rem;
    background-color: var(--accent-green);
    color: white;
    font-weight: 600;
    font-size: 1rem;
    border-radius: 0.25rem;
}

.btn-buy:hover {
    background-color: #0d9e6e;
}

/* Order Book */
.order-book {
    grid-area: book;
    background-color: var(--secondary-bg);
    border-radius: 0.5rem;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
}

.book-container {
    display: flex;
    gap: 1rem;
}

.bids, .asks {
    flex: 1;
}

.book-header, .book-entry {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 0.5rem;
    padding: 0.5rem 0;
    font-size: 0.875rem;
}

.book-header {
    color: var(--secondary-text);
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 0.5rem;
}

.book-entry {
    transition: background-color 0.3s;
}

.book-entry:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

.bids .book-entry {
    color: var(--accent-green);
}

.asks .book-entry {
    color: var(--accent-red);
}

/* Recent Trades */
.recent-trades {
    grid-area: trades;
    background-color: var(--secondary-bg);
    border-radius: 0.5rem;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
}

.trades-container {
    margin-top: 1rem;
}

.trades-header, .trade-item {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 0.5rem;
    padding: 0.5rem 0;
    font-size: 0.875rem;
}

.trades-header {
    color: var(--secondary-text);
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 0.5rem;
}

.trade-item {
    transition: background-color 0.3s;
}

.trade-item:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

.trade-buy {
    color: var(--accent-green);
}

.trade-sell {
    color: var(--accent-red);
}

/* Footer */
.footer {
    background-color: var(--secondary-bg);
    padding: 2rem;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: bold;
}

.footer-links {
    display: flex;
    gap: 1.5rem;
}

.footer-links a {
    color: var(--secondary-text);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: var(--primary-text);
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    color: var(--secondary-text);
    font-size: 1.25rem;
    transition: color 0.3s;
}

.social-links a:hover {
    color: var(--primary-text);
}

.copyright {
    text-align: center;
    color: var(--secondary-text);
    font-size: 0.875rem;
}

/* Responsive Styles */
@media (max-width: 1200px) {
    .main-content {
        grid-template-columns: 1fr;
        grid-template-areas:
            "market"
            "pairs"
            "order"
            "book"
            "trades";
    }
}

@media (max-width: 768px) {
    .header {
        padding: 1rem;
    }

    .main-nav {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: var(--secondary-bg);
        padding: 1rem;
        border-bottom: 1px solid var(--border-color);
        z-index: 100;
    }

    .main-nav.active {
        display: block;
    }

    .main-nav ul {
        flex-direction: column;
        gap: 1rem;
    }

    .mobile-menu-btn {
        display: block;
    }

    .user-actions {
        display: none;
    }

    .book-container {
        flex-direction: column;
    }

    .footer-content {
        flex-direction: column;
        gap: 1.5rem;
        text-align: center;
    }

    .footer-links {
        flex-direction: column;
        gap: 0.5rem;
    }
}