/* Binance-inspired dark + gold theme — Bootstrap 5.3 dark mode overrides */
:root {
    --bg-primary: #181a20;
    --bg-secondary: #1e2329;
    --bg-card: #2b3139;
    --bg-input: #181a20;
    --text-primary: #eaecef;
    --text-secondary: #848e9c;
    --accent: #fcd535;
    --accent-hover: #f0b90b;
    --accent-text: #181a20;
    --green: #0ecb81;
    --red: #f6465d;
    --yellow: #fcd535;
    --border: #2b3139;
    --border-hover: #474d57;
    --radius: 8px;
}

/* Override Bootstrap dark mode variables to match Binance theme */
[data-bs-theme="dark"] {
    --bs-body-bg: #181a20;
    --bs-body-color: #eaecef;
    --bs-secondary-bg: #1e2329;
    --bs-tertiary-bg: #2b3139;
    --bs-card-bg: #2b3139;
    --bs-card-border-color: #2b3139;
    --bs-border-color: #2b3139;
    --bs-link-color: #fcd535;
    --bs-link-hover-color: #f0b90b;
    --bs-primary: #fcd535;
    --bs-primary-rgb: 252, 213, 53;
    --bs-success-rgb: 14, 203, 129;
    --bs-danger-rgb: 246, 70, 93;
    --bs-warning-rgb: 252, 213, 53;
    --bs-table-bg: transparent;
    --bs-table-hover-bg: rgba(255, 255, 255, 0.02);
    --bs-table-border-color: #2b3139;
    --bs-modal-bg: #2b3139;
    --bs-modal-border-color: #474d57;
    --bs-input-bg: #181a20;
    --bs-input-border-color: #474d57;
    --bs-input-color: #eaecef;
    --bs-breadcrumb-divider-color: #848e9c;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
}

h1:focus { outline: none; }

a { color: var(--accent); }
a:hover { color: var(--accent-hover); }

/* Layout */
.app-layout {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.top-nav {
    display: flex;
    align-items: center;
    gap: 2rem;
    padding: 0.75rem 1.5rem;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent);
    text-decoration: none;
    letter-spacing: 0.5px;
}

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

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius);
    transition: color 0.2s, background 0.2s;
    font-size: 0.9rem;
    font-weight: 500;
}

.nav-links a:hover {
    color: var(--accent);
    background: rgba(252, 213, 53, 0.08);
}

.page-content {
    flex: 1;
    padding: 1.5rem;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

.status-bar {
    padding: 0.5rem 1.5rem;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    font-size: 0.8rem;
}

.status-bar-content {
    display: flex;
    gap: 2rem;
    color: var(--text-secondary);
}

.status-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-right: 4px;
}

.status-dot.connected { background: var(--green); }
.status-dot.disconnected { background: var(--red); }

/* Cards — let Bootstrap handle .card-body/.card-header padding */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.card-header {
    background: rgba(0, 0, 0, 0.15);
    border-bottom-color: var(--border);
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

/* Tables — override Bootstrap table colors for dark theme */
.table {
    --bs-table-color: var(--text-primary);
    --bs-table-bg: transparent;
    --bs-table-border-color: var(--border);
    --bs-table-hover-bg: rgba(255, 255, 255, 0.02);
}

.table th {
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
}

/* Buttons — override Bootstrap button styles for Binance gold theme */
.btn-primary {
    --bs-btn-bg: var(--accent);
    --bs-btn-border-color: var(--accent);
    --bs-btn-color: var(--accent-text);
    --bs-btn-hover-bg: var(--accent-hover);
    --bs-btn-hover-border-color: var(--accent-hover);
    --bs-btn-hover-color: var(--accent-text);
    --bs-btn-active-bg: var(--accent-hover);
    --bs-btn-active-border-color: var(--accent-hover);
    --bs-btn-active-color: var(--accent-text);
    --bs-btn-disabled-bg: #5a5420;
    --bs-btn-disabled-border-color: #5a5420;
    --bs-btn-disabled-color: #848e9c;
    font-weight: 600;
}

.btn-danger {
    --bs-btn-bg: var(--red);
    --bs-btn-border-color: var(--red);
    --bs-btn-hover-bg: #d93a4f;
    --bs-btn-hover-border-color: #d93a4f;
}

.btn-success {
    --bs-btn-bg: var(--green);
    --bs-btn-border-color: var(--green);
    --bs-btn-hover-bg: #0cb072;
    --bs-btn-hover-border-color: #0cb072;
}

.btn-warning {
    --bs-btn-bg: var(--yellow);
    --bs-btn-border-color: var(--yellow);
    --bs-btn-color: var(--accent-text);
    --bs-btn-hover-bg: var(--accent-hover);
    --bs-btn-hover-border-color: var(--accent-hover);
    --bs-btn-hover-color: var(--accent-text);
    font-weight: 600;
}

.btn-secondary {
    --bs-btn-bg: var(--bg-secondary);
    --bs-btn-border-color: var(--border);
    --bs-btn-color: var(--text-primary);
    --bs-btn-hover-bg: var(--bg-card);
    --bs-btn-hover-border-color: var(--text-secondary);
    --bs-btn-hover-color: var(--text-primary);
}

.btn-outline-secondary {
    --bs-btn-color: var(--text-secondary);
    --bs-btn-border-color: var(--border);
    --bs-btn-hover-bg: var(--bg-card);
    --bs-btn-hover-border-color: var(--text-secondary);
    --bs-btn-hover-color: var(--text-primary);
}

/* Forms — override Bootstrap form controls for dark theme */
.form-control, .form-select {
    background-color: var(--bg-input);
    border-color: var(--border-hover);
    color: var(--text-primary);
}

.form-control:focus, .form-select:focus {
    background-color: var(--bg-input);
    border-color: var(--accent);
    color: var(--text-primary);
    box-shadow: 0 0 0 0.2rem rgba(252, 213, 53, 0.15);
}

.form-control::placeholder {
    color: var(--text-secondary);
}

.form-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

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

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

/* Modals — Bootstrap dark theme */
.modal-content {
    background-color: var(--bg-card);
    border-color: var(--border-hover);
    color: var(--text-primary);
}

.modal-header {
    border-bottom-color: var(--border);
}

.modal-footer {
    border-top-color: var(--border);
}

/* Badges — override for dark theme */
.badge.bg-success { background-color: var(--green) !important; }
.badge.bg-danger { background-color: var(--red) !important; }
.badge.bg-warning { background-color: var(--yellow) !important; color: var(--accent-text) !important; }
.badge.bg-secondary { background-color: var(--bg-secondary) !important; }

/* Breadcrumbs */
.breadcrumb {
    --bs-breadcrumb-divider-color: var(--text-secondary);
    --bs-breadcrumb-item-active-color: var(--text-primary);
}

.breadcrumb a {
    color: var(--accent);
    text-decoration: none;
}

/* Pagination */
.page-link {
    background-color: var(--bg-card);
    border-color: var(--border);
    color: var(--text-primary);
}

.page-link:hover {
    background-color: var(--bg-secondary);
    border-color: var(--border-hover);
    color: var(--accent);
}

.page-item.active .page-link {
    background-color: var(--accent);
    border-color: var(--accent);
    color: var(--accent-text);
}

.page-item.disabled .page-link {
    background-color: var(--bg-primary);
    border-color: var(--border);
    color: var(--text-secondary);
}

/* Spinner — Bootstrap spinner color */
.spinner-border {
    color: var(--accent);
}

/* Nav tabs/pills */
.nav-tabs {
    --bs-nav-tabs-border-color: var(--border);
    --bs-nav-tabs-link-active-bg: var(--bg-card);
    --bs-nav-tabs-link-active-color: var(--text-primary);
    --bs-nav-tabs-link-active-border-color: var(--border) var(--border) var(--bg-card);
}

.nav-link {
    color: var(--text-secondary);
}

.nav-link:hover {
    color: var(--accent);
}

/* Progress bars */
.progress {
    background-color: var(--bg-primary);
    border-radius: 4px;
}

.progress-bar {
    background-color: var(--accent);
}

/* PnL */
.pnl.positive { color: var(--green); }
.pnl.negative { color: var(--red); }

/* Status badges (custom) */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.2rem 0.6rem;
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 500;
}

.badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
}

.status-badge.running { background: rgba(63, 185, 80, 0.15); color: var(--green); }
.status-badge.running .badge-dot { background: var(--green); }
.status-badge.stopped { background: rgba(139, 148, 158, 0.15); color: var(--text-secondary); }
.status-badge.stopped .badge-dot { background: var(--text-secondary); }
.status-badge.paused { background: rgba(210, 153, 34, 0.15); color: var(--yellow); }
.status-badge.paused .badge-dot { background: var(--yellow); }
.status-badge.error { background: rgba(248, 81, 73, 0.15); color: var(--red); }
.status-badge.error .badge-dot { background: var(--red); }

/* Confirm Dialog (custom) */
.confirm-dialog {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 200;
    align-items: center;
    justify-content: center;
}

.confirm-dialog.visible { display: flex; }

.confirm-dialog-content {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    max-width: 400px;
    width: 90%;
}

.confirm-dialog-actions {
    display: flex;
    gap: 0.75rem;
    justify-content: flex-end;
    margin-top: 1.25rem;
}

/* Loading spinner (custom) */
.loading-spinner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    padding: 2rem;
}

.spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Charts */
.price-chart, .equity-chart {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

/* Wizard (custom) */
.wizard-steps {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 2rem;
}

.wizard-step {
    flex: 1;
    padding: 0.75rem;
    text-align: center;
    border-radius: var(--radius);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.wizard-step.active {
    background: var(--accent);
    color: var(--accent-text);
}

.wizard-step.completed {
    background: var(--green);
    color: #fff;
}

/* Progress bar (custom — non-Bootstrap) */
.progress-fill {
    height: 100%;
    border-radius: 4px;
    background: var(--accent);
    transition: width 0.3s;
}

/* Side badges */
.side-buy { color: var(--green); font-weight: 600; }
.side-sell { color: var(--red); font-weight: 600; }

/* Auth pages — Binance-style centered card */
.auth-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    flex: 1;
    min-height: 0;
    padding: 2rem 1rem;
}

.auth-card {
    width: 100%;
    max-width: 420px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-hover);
    border-radius: 12px;
    padding: 2.5rem;
}

.auth-card h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 2rem;
    color: var(--text-primary);
}

.auth-card .form-label {
    display: block;
    margin-bottom: 0.4rem;
    color: var(--text-primary);
    font-size: 0.875rem;
    font-weight: 500;
}

.auth-card .form-group {
    margin-bottom: 1.25rem;
}

.auth-card .btn-primary {
    width: 100%;
    padding: 0.85rem 1rem;
    font-size: 1rem;
    border-radius: var(--radius);
    margin-top: 0.5rem;
    justify-content: center;
}

.auth-card .auth-footer {
    text-align: center;
    margin-top: 1.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.auth-card .auth-footer a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 500;
}

.auth-card .auth-footer a:hover {
    text-decoration: underline;
}

.auth-card .auth-divider {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin: 1.5rem 0;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.auth-card .auth-divider::before,
.auth-card .auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-hover);
}

/* Validation */
.valid.modified:not([type=checkbox]) { outline: none; border-color: var(--green); }
.invalid { outline: none; border-color: var(--red) !important; }
.validation-message { color: var(--red); font-size: 0.8rem; margin-top: 0.3rem; }
.text-danger { color: var(--red); font-size: 0.85rem; }
.text-success { color: var(--green); }
.alert-danger { background: rgba(246, 70, 93, 0.12); border: 1px solid rgba(246, 70, 93, 0.3); color: var(--red); }
.alert-success { background: rgba(14, 203, 129, 0.12); border: 1px solid rgba(14, 203, 129, 0.3); color: var(--green); }

/* Blazor error UI */
.blazor-error-boundary {
    background: var(--red);
    padding: 1rem;
    color: white;
}

.blazor-error-boundary::after { content: "An error has occurred."; }

/* Responsive (SRS NFR-5.1: desktop and tablet viewports) */
@media (max-width: 992px) {
    .page-content { padding: 1rem; }
    .card-grid { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
    .nav-links { flex-wrap: wrap; gap: 0.25rem; }
    .nav-links a { padding: 0.35rem 0.5rem; font-size: 0.8rem; }
    .table-responsive { font-size: 0.85rem; }
}

@media (max-width: 768px) {
    .card-grid { grid-template-columns: 1fr; }
    .top-nav { flex-direction: column; gap: 0.5rem; padding: 0.5rem 1rem; }
    .nav-logo { text-align: center; }
    .nav-links { justify-content: center; }
    .page-content { padding: 0.75rem; }
    .auth-card { padding: 1.5rem; }
    .wizard-steps { flex-direction: column; gap: 0.25rem; }
    .status-bar-content { flex-wrap: wrap; gap: 0.75rem; font-size: 0.75rem; }
    /* Stack card columns on mobile */
    .row > [class*="col-md-"] { margin-bottom: 1rem; }
    /* Full-width charts on mobile */
    [id*="chart"] { min-height: 250px; }
}

@media (max-width: 480px) {
    .top-nav { padding: 0.5rem 0.75rem; }
    .nav-links a { font-size: 0.75rem; padding: 0.25rem 0.4rem; }
    h2 { font-size: 1.25rem; }
    .card-body { padding: 0.75rem; }
    .btn { padding: 0.4rem 0.75rem; font-size: 0.85rem; }
}