@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: #0f172a;
    color: #e2e8f0;
    min-height: 100vh;
}

/* ===== TOPBAR ===== */
.topbar {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 32px;
    background: #1e293b;
    border-bottom: 1px solid #334155;
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: #f1f5f9;
    font-weight: 700;
    font-size: 1.2rem;
}

.topbar-left img {
    width: 36px;
    height: 36px;
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.topbar-user {
    color: #94a3b8;
    font-size: 0.9rem;
}

.btn-logout {
    background: #ef4444;
    color: #fff;
    border: none;
    padding: 8px 16px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 500;
    transition: background 0.2s;
}

.btn-logout:hover {
    background: #dc2626;
}

/* ===== PAGE LAYOUT ===== */
.funds-page {
    max-width: 1000px;
    margin: 0 auto;
    padding: 32px 24px 60px;
}

.page-header {
    margin-bottom: 28px;
}

.page-header h1 {
    font-size: 1.7rem;
    font-weight: 700;
    color: #f1f5f9;
    margin-bottom: 6px;
}

.page-header h1 i {
    color: #60a5fa;
    margin-right: 8px;
}

.page-header p {
    color: #94a3b8;
    font-size: 0.95rem;
}

/* ===== SECTION CARDS ===== */
.section-card {
    background: #1e293b;
    border-radius: 16px;
    border: 1px solid #334155;
    margin-bottom: 24px;
    overflow: hidden;
}

.section-header {
    padding: 16px 24px;
    border-bottom: 1px solid #334155;
}

.section-header h2 {
    font-size: 1.05rem;
    font-weight: 600;
    color: #f1f5f9;
}

.section-header h2 i {
    margin-right: 8px;
    color: #60a5fa;
}

.section-header.add h2 i {
    color: #34d399;
}

.section-header.withdraw h2 i {
    color: #f87171;
}

.section-body {
    padding: 24px;
}

/* ===== WALLET GRID ===== */
.wallet-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 12px;
}

.wallet-card {
    background: #0f172a;
    border: 1px solid #334155;
    border-radius: 12px;
    padding: 14px;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: border-color 0.2s;
}

.wallet-card:hover {
    border-color: #60a5fa;
}

.wallet-icon {
    width: 42px;
    height: 42px;
    border-radius: 10px;
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.7rem;
    color: #fff;
    flex-shrink: 0;
}

.wallet-info {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.wallet-currency {
    font-size: 0.75rem;
    color: #94a3b8;
    font-weight: 500;
}

.wallet-amount {
    font-size: 0.95rem;
    font-weight: 600;
    color: #f1f5f9;
}

.wallet-empty {
    grid-column: 1 / -1;
    text-align: center;
    padding: 32px 16px;
    color: #64748b;
    font-size: 0.95rem;
}

.wallet-empty i {
    margin-right: 6px;
}

/* ===== ACTION ROW ===== */
.action-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

/* ===== FORMS ===== */
.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: #94a3b8;
    margin-bottom: 6px;
}

.form-group select,
.form-group input {
    width: 100%;
    padding: 10px 14px;
    background: #0f172a;
    border: 1px solid #334155;
    border-radius: 10px;
    color: #f1f5f9;
    font-size: 0.95rem;
    font-family: inherit;
    transition: border-color 0.2s;
    outline: none;
}

.form-group select:focus,
.form-group input:focus {
    border-color: #60a5fa;
}

.form-group select option {
    background: #1e293b;
    color: #f1f5f9;
}

.balance-hint {
    display: block;
    margin-top: 4px;
    font-size: 0.8rem;
    color: #60a5fa;
}

/* ===== ACTION BUTTONS ===== */
.btn-action {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: inherit;
}

.btn-add {
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    color: #fff;
}

.btn-add:hover {
    background: linear-gradient(135deg, #2563eb 0%, #1e40af 100%);
    transform: translateY(-1px);
}

.btn-withdraw {
    background: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
    color: #fff;
}

.btn-withdraw:hover {
    background: linear-gradient(135deg, #ea580c 0%, #c2410c 100%);
    transform: translateY(-1px);
}

.btn-action:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* ===== TRANSACTIONS TABLE ===== */
.txn-wrapper {
    overflow-x: auto;
}

.txn-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.txn-table thead th {
    text-align: left;
    padding: 12px 20px;
    color: #64748b;
    font-weight: 500;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid #334155;
}

.txn-table tbody td {
    padding: 12px 20px;
    border-bottom: 1px solid rgba(51, 65, 85, 0.5);
    color: #cbd5e1;
}

.txn-table tbody tr:hover {
    background: rgba(96, 165, 250, 0.04);
}

.txn-badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.txn-badge.buy {
    background: rgba(52, 211, 153, 0.15);
    color: #34d399;
}

.txn-badge.sell {
    background: rgba(248, 113, 113, 0.15);
    color: #f87171;
}

.txn-badge.deposit {
    background: rgba(96, 165, 250, 0.15);
    color: #60a5fa;
}

.txn-badge.withdrawal {
    background: rgba(251, 191, 36, 0.15);
    color: #fbbf24;
}

.txn-empty {
    text-align: center;
    padding: 32px 16px;
    color: #64748b;
    font-size: 0.95rem;
}

.txn-empty i {
    margin-right: 6px;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .topbar {
        padding: 10px 16px;
    }

    .funds-page {
        padding: 20px 14px 40px;
    }

    .action-row {
        grid-template-columns: 1fr;
    }

    .wallet-grid {
        grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    }
}

@media (max-width: 480px) {
    .topbar-user {
        display: none;
    }

    .page-header h1 {
        font-size: 1.3rem;
    }
}