:root {
    /* Brand Colors */
    --brand-primary: #18c8fe;
    --brand-accent: #eeae37;
    --brand-accent-hover: #fcd34d;

    /* Neutral Colors */
    --neutral-white: #FFFFFF;
    --neutral-bg: #F9FAFB;
    --neutral-chat-bg: #FFFFFF;
    --text-dark: #333333;
    --text-gray: #4B5563;
    --text-light: #9CA3AF;
    --border-color: #E5E7EB;

    /* Font */
    --font-family: 'Inter', sans-serif;
}

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

body {
    font-family: var(--font-family);
    color: var(--text-dark);
    background-color: var(--neutral-bg);
    min-height: 100vh;
}

.app-container {
    display: flex;
    min-height: 100vh;
}

/* --- Sidebar (Simplified for Account Page) --- */
.sidebar {
    width: 260px;
    background-color: var(--neutral-white);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
    position: sticky;
    top: 0;
    height: 100vh;
}

.back-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-gray);
    text-decoration: none;
    font-weight: 500;
    margin-bottom: 2rem;
    transition: color 0.2s;
}

.back-btn:hover {
    color: var(--brand-primary);
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    flex: 1;
}

.nav-item {
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    color: var(--text-gray);
    cursor: pointer;
    transition: all 0.2s;
    font-weight: 500;
}

.nav-item:hover {
    background-color: var(--neutral-bg);
    color: var(--text-dark);
}

.nav-item.active {
    background-color: #EFF6FF;
    /* Blue-50 */
    color: var(--brand-primary);
}

.sidebar-footer {
    margin-top: auto;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.logout-btn {
    width: 100%;
    padding: 0.75rem;
    background-color: #FEF2F2;
    /* Red-50 */
    color: #DC2626;
    /* Red-600 */
    border: none;
    border-radius: 0.5rem;
    cursor: pointer;
    font-weight: 500;
    transition: background-color 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.logout-btn:hover {
    background-color: #FEE2E2;
    /* Red-100 */
}

/* --- Main Content --- */
.main-content {
    flex: 1;
    padding: 2rem 4rem;
    max-width: 1000px;
    margin: 0 auto;
}

.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.section-subtitle {
    color: var(--text-gray);
    margin-bottom: 2rem;
}

.card {
    background-color: var(--neutral-white);
    border-radius: 1rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    padding: 2rem;
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
}

.card-header {
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
}

/* Profile Section */
.profile-info {
    display: grid;
    gap: 1.5rem;
}

.info-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-gray);
    margin-bottom: 0.5rem;
}

.info-value {
    font-size: 1rem;
    color: var(--text-dark);
    font-weight: 500;
}

/* Form Styles */
.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--text-dark);
}

.input-wrapper {
    position: relative;
}

.form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    font-family: inherit;
    font-size: 0.95rem;
    transition: border-color 0.2s;
}

.form-input:focus {
    outline: none;
    border-color: var(--brand-primary);
    box-shadow: 0 0 0 3px rgba(24, 200, 254, 0.1);
}

.password-toggle {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    cursor: pointer;
    color: var(--text-light);
}

.btn-primary {
    background-color: var(--brand-primary);
    color: white;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s;
}

.btn-primary:hover {
    background-color: #0ea5e9;
}

/* Password Requirements */
.password-requirements {
    margin-top: 10px;
    font-size: 0.85rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.requirement-item {
    display: flex;
    align-items: center;
    gap: 5px;
    color: #6b7280;
}

.requirement-item.valid {
    color: #10b981;
    /* Green */
}

.requirement-item.invalid {
    color: #ef4444;
    /* Red */
}

/* Responsive */
@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
        padding: 1rem;
    }

    .main-content {
        padding: 1rem;
    }

    .topup-cards-grid {
        grid-template-columns: 1fr;
    }

    .wallet-balance-hero {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }

    .balance-status {
        margin-left: 0;
    }

    .transactions-table th,
    .transactions-table td {
        padding: 0.75rem 0.5rem;
        font-size: 0.85rem;
    }
}

/* ========================================
   WALLET SECTION STYLES
   ======================================== */

/* Balance Hero Card */
.wallet-balance-card {
    background: linear-gradient(135deg, var(--neutral-white) 0%, #f8fafc 100%);
}

.wallet-balance-hero {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1rem;
}

.balance-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: linear-gradient(135deg, #18c8fe 0%, #0ea5e9 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.balance-content {
    flex: 1;
}

.balance-label {
    font-size: 0.875rem;
    color: var(--text-gray);
    display: block;
    margin-bottom: 0.25rem;
}

.balance-amount {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
}

.balance-value {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1;
}

.balance-currency {
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--text-gray);
}

.balance-status {
    margin-left: auto;
}

.status-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    font-size: 0.875rem;
    font-weight: 600;
}

/* Balance Color States */
.wallet-balance-card.status-positive .balance-value,
.wallet-balance-card.status-positive .balance-icon {
    color: #10b981;
}

.wallet-balance-card.status-positive .balance-icon {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
}

.wallet-balance-card.status-positive .status-badge {
    background-color: #d1fae5;
    color: #065f46;
}

.wallet-balance-card.status-warning .balance-value {
    color: #f59e0b;
}

.wallet-balance-card.status-warning .balance-icon {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    color: white;
}

.wallet-balance-card.status-warning .status-badge {
    background-color: #fef3c7;
    color: #92400e;
}

.wallet-balance-card.status-negative .balance-value {
    color: #ef4444;
}

.wallet-balance-card.status-negative .balance-icon {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
}

.wallet-balance-card.status-negative .status-badge {
    background-color: #fee2e2;
    color: #991b1b;
}

.wallet-threshold-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background-color: #eff6ff;
    border-radius: 0.5rem;
    color: var(--text-gray);
    font-size: 0.875rem;
}

.wallet-threshold-info svg {
    color: var(--brand-primary);
    flex-shrink: 0;
}

.wallet-last-updated {
    margin-top: 1rem;
    font-size: 0.75rem;
    color: var(--text-light);
    text-align: right;
}

/* Top-up Cards */
.topup-cards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.topup-card {
    position: relative;
    background: var(--neutral-white);
    border: 2px solid var(--border-color);
    border-radius: 1rem;
    padding: 1.5rem;
    text-align: center;
    transition: all 0.3s ease;
}

.topup-card:hover {
    border-color: var(--brand-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(24, 200, 254, 0.15);
}

.topup-card.featured {
    border-color: var(--brand-primary);
    background: linear-gradient(135deg, #f0faff 0%, #fff 100%);
}

.topup-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, #18c8fe 0%, #0ea5e9 100%);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.75rem;
    font-weight: 600;
    white-space: nowrap;
}

.topup-pennies {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 0.25rem;
}

.topup-pennies span {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-gray);
}

.topup-price {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--brand-primary);
    margin-bottom: 0.5rem;
}

.topup-bonus {
    font-size: 0.875rem;
    color: #10b981;
    font-weight: 500;
    margin-bottom: 1rem;
}

.topup-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background: linear-gradient(135deg, #18c8fe 0%, #0ea5e9 100%);
    color: white;
    border: none;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.topup-btn:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(24, 200, 254, 0.3);
}

.topup-btn:disabled {
    background: #e5e7eb;
    color: #9ca3af;
    cursor: not-allowed;
}

.topup-coming-soon {
    display: block;
    margin-top: 0.75rem;
    font-size: 0.75rem;
    color: var(--text-light);
    font-style: italic;
}

/* Transaction Table */
#transactions-container {
    max-height: 480px;
    overflow-y: auto;
    scrollbar-width: thin;
}

#transactions-container::-webkit-scrollbar {
    width: 6px;
}

#transactions-container::-webkit-scrollbar-track {
    background: transparent;
}

#transactions-container::-webkit-scrollbar-thumb {
    background-color: var(--border-color);
    border-radius: 3px;
}

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

.transactions-table th,
.transactions-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.transactions-table th {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-gray);
    background-color: #f9fafb;
    position: sticky;
    top: 0;
    z-index: 10;
    box-shadow: 0 1px 0 var(--border-color);
}

.transactions-table tbody tr:hover {
    background-color: #f9fafb;
}

.transactions-table tbody tr:last-child td {
    border-bottom: none;
}

.transaction-amount {
    font-weight: 600;
    font-family: 'SF Mono', 'Monaco', monospace;
}

.transaction-amount.positive {
    color: #10b981;
}

.transaction-amount.negative {
    color: #ef4444;
}

.transaction-balance {
    color: var(--text-gray);
    font-size: 0.875rem;
}

.transaction-type-badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    font-weight: 500;
}

.transaction-type-badge.purchase {
    background-color: #d1fae5;
    color: #065f46;
}

.transaction-type-badge.inference {
    background-color: #fef3c7;
    color: #92400e;
}

/* Empty State */
.transactions-empty {
    text-align: center;
    padding: 3rem 2rem;
}

.transactions-empty svg {
    color: var(--text-light);
    margin-bottom: 1rem;
}

.transactions-empty h3 {
    color: var(--text-gray);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.transactions-empty p {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* Loading State */
.transactions-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem;
    gap: 1rem;
    color: var(--text-gray);
}

.loading-spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--border-color);
    border-top-color: var(--brand-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Mobile-specific fixes for wallet cards */
@media (max-width: 768px) {
    .topup-cards-grid {
        grid-template-columns: 1fr !important;
        gap: 1rem !important;
    }

    .card {
        padding: 1rem;
        margin-left: 0;
        margin-right: 0;
    }

    .topup-card {
        padding: 1rem;
    }

    .main-content {
        padding: 1rem;
        max-width: 100%;
    }

    .section-title {
        font-size: 1.25rem;
    }

    .balance-value {
        font-size: 2rem;
    }

    .balance-currency {
        font-size: 1rem;
    }

    .wallet-threshold-info {
        padding: 0.5rem 0.75rem;
        font-size: 0.8rem;
    }

    /* Transaction Table Mobile Fixes */
    #transactions-container {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .transactions-table {
        min-width: 100%;
    }

    .transactions-table th,
    .transactions-table td {
        padding: 0.75rem 0.5rem;
        font-size: 0.8rem;
        white-space: nowrap;
    }

    .transactions-table th:first-child,
    .transactions-table td:first-child {
        padding-left: 0.75rem;
    }

    .transactions-table th:last-child,
    .transactions-table td:last-child {
        padding-right: 0.75rem;
    }

    .transaction-amount {
        font-size: 0.85rem;
    }

    .transaction-balance {
        font-size: 0.75rem;
    }
}