/* ============================================
   xsubi Design System — Dark Industrial
   Shared across xsubi.com and portal.xsubi.com
   ============================================ */

/* ============================================
   :root — non-color tokens (theme-independent) +
           dark theme fallback vars.
   Full per-theme color vars are injected at runtime
   by js/theme.js from /themes/{name}.json into
   <style id="xs-theme-vars">. These :root vars cover
   the pre-JS paint gap so there is no flash.
   ============================================ */
:root {
    /* Non-color tokens */
    --xs-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --xs-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
    --xs-shadow-md: 0 4px 12px rgba(0, 0, 0, 0.5);
    --xs-shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.6);
    --xs-radius: 6px;
    --xs-radius-sm: 4px;
    --xs-radius-lg: 8px;
    --xs-transition: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --xs-font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', 'Consolas', monospace;

    /* Dark theme fallback (overridden by #xs-theme-vars once loaded) */
    --xs-primary: #6366f1;
    --xs-primary-hover: #818cf8;
    --xs-primary-light: #a5b4fc;
    --xs-primary-subtle: rgba(99, 102, 241, 0.12);
    --xs-accent: #22d3ee;
    --xs-accent-hover: #67e8f9;
    --xs-accent-subtle: rgba(34, 211, 238, 0.1);

    --xs-success: #10b981;
    --xs-warning: #f59e0b;
    --xs-danger: #ef4444;
    --xs-info: #3b82f6;

    --xs-bg: #0b1120;
    --xs-bg-surface: #111827;
    --xs-bg-card: #1a2332;
    --xs-bg-card-hover: #1f2b3d;
    --xs-bg-elevated: #1e293b;
    --xs-sidebar-from: #070d1a;
    --xs-sidebar-to: #0f0b24;
    --xs-card-border: #1e2d42;
    --xs-border: #1e3a5f;
    --xs-border-subtle: rgba(99, 102, 241, 0.15);
    --xs-nav-divider: rgba(255, 255, 255, 0.1);
    --xs-nav-hover-bg: rgba(255, 255, 255, 0.08);
    --xs-nav-active-bg: rgba(255, 255, 255, 0.12);
    --xs-nav-overlay-bg: rgba(0, 0, 0, 0.2);
    --xs-nav-text: rgba(255, 255, 255, 0.7);
    --xs-nav-text-active: #ffffff;

    --xs-text: #e2e8f0;
    --xs-text-secondary: #8b9ab5;
    --xs-text-muted: #5a6b80;
    --xs-text-bright: #f8fafc;

    --xs-gradient-start: #0b1120;
    --xs-gradient-end: #1a1040;
    --xs-hero-from: #070d1a;
    --xs-hero-mid: #0f0b24;
    --xs-hero-to: #1a1145;
    --xs-glow: 0 0 20px rgba(34, 211, 238, 0.15);
    --xs-glow-color: rgba(99, 102, 241, 0.3);
    --xs-accent-glow-sm: rgba(34, 211, 238, 0.12);
    --xs-accent-glow-color: rgba(34, 211, 238, 0.08);
}

html, body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--xs-bg);
    color: var(--xs-text);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color 0.3s ease, color 0.3s ease;
}

a, .btn-link {
    color: var(--xs-accent);
    transition: color var(--xs-transition);
}

a:hover, .btn-link:hover {
    color: var(--xs-accent-hover);
}

.btn {
    border-radius: var(--xs-radius-sm);
    font-weight: 600;
    padding: 0.5rem 1.25rem;
    transition: all var(--xs-transition);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    font-size: 0.85rem;
}

.btn-primary {
    color: #fff;
    background-color: var(--xs-primary);
    border-color: var(--xs-primary);
}

.btn-primary:hover, .btn-primary:active {
    background-color: var(--xs-primary-hover);
    border-color: var(--xs-primary-hover);
    color: #fff;
    box-shadow: 0 0 16px var(--xs-glow-color);
}

.btn-outline-primary {
    color: var(--xs-primary);
    border-color: var(--xs-primary);
}

.btn-outline-primary:hover {
    background-color: var(--xs-primary);
    border-color: var(--xs-primary);
    color: #fff;
}

.btn-outline-light {
    border-color: rgba(255, 255, 255, 0.25);
    color: rgba(255, 255, 255, 0.9);
}

.btn-outline-light:hover {
    background-color: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.4);
    color: #fff;
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
    box-shadow: 0 0 0 0.2rem var(--xs-primary-subtle);
}

.card {
    border: 1px solid var(--xs-card-border);
    border-radius: var(--xs-radius);
    box-shadow: var(--xs-shadow-sm);
    transition: all var(--xs-transition);
    overflow: hidden;
    background: var(--xs-bg-card);
    color: var(--xs-text);
}

.card:hover {
    border-color: var(--xs-border-subtle);
    box-shadow: var(--xs-shadow);
}

.card-header {
    background-color: var(--xs-bg-surface);
    border-bottom: 1px solid var(--xs-card-border);
    font-weight: 600;
    color: var(--xs-text);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.card-body {
    color: var(--xs-text-secondary);
}

.card-title {
    color: var(--xs-text-bright);
}

.table {
    --bs-table-bg: transparent;
    --bs-table-color: var(--xs-text);
    --bs-table-hover-bg: rgba(34, 211, 238, 0.05);
    --bs-table-hover-color: var(--xs-text-bright);
    --bs-table-border-color: var(--xs-card-border);
    color: var(--xs-text);
}

.table thead th {
    font-weight: 700;
    color: var(--xs-text-muted);
    text-transform: uppercase;
    font-size: 0.7rem;
    letter-spacing: 0.08em;
    border-bottom: 2px solid var(--xs-border-subtle);
    background: var(--xs-bg-surface);
}

.table tbody td {
    border-color: var(--xs-card-border);
    vertical-align: middle;
}

.content {
    padding-top: 1.5rem;
}

h1 {
    color: var(--xs-text-bright);
    font-weight: 700;
    letter-spacing: -0.02em;
}

h1:focus {
    outline: none;
}

.text-muted {
    color: var(--xs-text-muted) !important;
}

.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--xs-text-bright);
    margin-bottom: 2rem;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

/* Metric cards */
.metric-card {
    border-radius: var(--xs-radius);
    padding: 1.5rem;
    color: white;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.metric-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
}

.metric-card .metric-value {
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1;
    font-family: var(--xs-font-mono);
}

.metric-card .metric-label {
    font-size: 0.75rem;
    opacity: 0.8;
    margin-top: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 600;
}

.metric-card .metric-icon {
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 2rem;
    opacity: 0.2;
}

.metric-card.primary { background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(99, 102, 241, 0.05)); border-color: rgba(99, 102, 241, 0.3); }
.metric-card.success { background: linear-gradient(135deg, rgba(16, 185, 129, 0.2), rgba(16, 185, 129, 0.05)); border-color: rgba(16, 185, 129, 0.3); }
.metric-card.warning { background: linear-gradient(135deg, rgba(245, 158, 11, 0.2), rgba(245, 158, 11, 0.05)); border-color: rgba(245, 158, 11, 0.3); }
.metric-card.info { background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(59, 130, 246, 0.05)); border-color: rgba(59, 130, 246, 0.3); }
.metric-card.accent { background: linear-gradient(135deg, rgba(34, 211, 238, 0.2), rgba(34, 211, 238, 0.05)); border-color: rgba(34, 211, 238, 0.3); }

.metric-card.primary .metric-value { color: var(--xs-primary-light); }
.metric-card.success .metric-value { color: #6ee7b7; }
.metric-card.warning .metric-value { color: #fcd34d; }
.metric-card.info .metric-value { color: #93c5fd; }
.metric-card.accent .metric-value { color: var(--xs-accent-hover); }

.metric-card .metric-label { color: var(--xs-text-secondary); }

.valid.modified:not([type=checkbox]) {
    outline: 1px solid var(--xs-success);
}

.invalid {
    outline: 1px solid var(--xs-danger);
}

.validation-message {
    color: var(--xs-danger);
}

.blazor-error-boundary {
    background: url(data:image/svg+xml;base64,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) no-repeat 1rem/1.8rem, var(--xs-danger);
    padding: 1rem 1rem 1rem 3.7rem;
    color: white;
    border-radius: var(--xs-radius-sm);
}

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

.darker-border-checkbox.form-check-input {
    border-color: #929292;
}

.form-floating > .form-control-plaintext::placeholder, .form-floating > .form-control::placeholder {
    color: var(--bs-secondary-color);
    text-align: end;
}

.form-floating > .form-control-plaintext:focus::placeholder, .form-floating > .form-control:focus::placeholder {
    text-align: start;
}

/* ============================================
   Mobile Responsive
   ============================================ */

@media (max-width: 640.98px) {
    h1 {
        font-size: 1.75rem;
    }

    .content {
        padding-top: 1rem;
    }

    .section-title {
        font-size: 1.15rem;
        margin-bottom: 1.25rem;
    }

    .metric-card {
        padding: 1.25rem;
    }

    .metric-card .metric-value {
        font-size: 2rem;
    }

    .metric-card .metric-icon {
        font-size: 1.5rem;
    }

    .table thead th {
        font-size: 0.65rem;
    }

    .btn-lg {
        padding: 0.625rem 1.25rem;
        font-size: 0.85rem;
    }
}

@media (max-width: 767.98px) {
    .card-body .table {
        font-size: 0.85rem;
    }
}

/* ── Scroll Animations ─────────────────────────────── */

.animate-on-scroll {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-on-scroll.animate-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger children — add animate-stagger to parent */
.animate-stagger > .animate-on-scroll:nth-child(1) { transition-delay: 0s; }
.animate-stagger > .animate-on-scroll:nth-child(2) { transition-delay: 0.1s; }
.animate-stagger > .animate-on-scroll:nth-child(3) { transition-delay: 0.2s; }
.animate-stagger > .animate-on-scroll:nth-child(4) { transition-delay: 0.3s; }
.animate-stagger > .animate-on-scroll:nth-child(5) { transition-delay: 0.4s; }
.animate-stagger > .animate-on-scroll:nth-child(6) { transition-delay: 0.5s; }

/* Slide from left variant */
.animate-on-scroll.animate-from-left {
    transform: translateX(-20px);
}
.animate-on-scroll.animate-from-left.animate-visible {
    transform: translateX(0);
}

/* Slide from right variant */
.animate-on-scroll.animate-from-right {
    transform: translateX(20px);
}
.animate-on-scroll.animate-from-right.animate-visible {
    transform: translateX(0);
}

/* Scale up variant */
.animate-on-scroll.animate-scale {
    transform: scale(0.95);
}
.animate-on-scroll.animate-scale.animate-visible {
    transform: scale(1);
}

/* Respect reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    .animate-on-scroll {
        opacity: 1;
        transform: none;
        transition: none;
    }
    .animate-on-scroll.animate-visible {
        transform: none;
    }
}

/* ── Feature Flag Disabled State ───────────────────── */

.feature-disabled {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 50vh;
    text-align: center;
    gap: 1rem;
}

.feature-disabled h1 {
    color: var(--xs-text);
    font-size: 2rem;
}

.feature-disabled p {
    color: var(--xs-text-secondary);
    font-size: 1.125rem;
}

/* ── Accessibility ──────────────────────────────────── */

/* Skip link — hidden until focused */
.skip-link {
    position: absolute;
    top: -48px;
    left: 16px;
    background: var(--xs-primary);
    color: #fff;
    padding: 10px 18px;
    border-radius: 0 0 var(--xs-radius) var(--xs-radius);
    font-weight: 600;
    font-size: 0.875rem;
    text-decoration: none;
    z-index: 10000;
    transition: top 0.15s ease;
}

.skip-link:focus {
    top: 0;
    outline: 2px solid var(--xs-accent);
    outline-offset: 2px;
}

/* Visible focus indicators for interactive elements */
:focus-visible {
    outline: 2px solid var(--xs-primary);
    outline-offset: 2px;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
    outline: 2px solid var(--xs-primary);
    outline-offset: 2px;
    border-radius: var(--xs-radius-sm);
}

/* Required field indicator */
.required-indicator {
    color: var(--xs-danger, #f87171);
    margin-left: 2px;
}

/* ── Auth Error States ──────────────────────────────── */

.auth-error {
    background: var(--error-bg, rgba(220, 38, 38, 0.1));
    border: 1px solid var(--error-border, rgba(220, 38, 38, 0.3));
    color: var(--error-text, #ef4444);
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.auth-error-list {
    margin: 0.5rem 0 0 1.25rem;
    padding: 0;
    font-size: 0.85rem;
}

/* ── Cloud Architecture Page ──────────────────────────── */
.arch-diagram {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 8px;
    padding: 1rem;
    overflow-x: auto;
    margin-top: 1rem;
}

.arch-ascii {
    color: var(--accent-cyan, #00d4ff);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    line-height: 1.4;
    margin: 0;
    white-space: pre;
}

.provider-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 8px;
    overflow: hidden;
}

.provider-header {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.provider-header h3 {
    margin: 0;
    font-size: 1.1rem;
}

.provider-status {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.provider-status.active {
    color: #22c55e;
}

.provider-status.planned {
    color: #f59e0b;
}

.provider-body {
    padding: 1.5rem;
}

.provider-body h4 {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    opacity: 0.6;
    margin-bottom: 0.75rem;
}

.provider-features {
    list-style: none;
    padding: 0;
    margin: 0;
}

.provider-features li {
    padding: 0.3rem 0;
    font-size: 0.9rem;
}

.provider-tier {
    margin-top: 1rem;
    padding: 0.75rem;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 6px;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.tier-badge {
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    color: white;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    white-space: nowrap;
}

.tier-detail {
    font-size: 0.8rem;
    opacity: 0.7;
}

.tech-matrix-table {
    font-size: 0.85rem;
    border-color: rgba(255, 255, 255, 0.08) !important;
}

.tech-matrix-table th {
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    padding: 0.75rem;
    background: rgba(255, 255, 255, 0.03);
}

.tech-matrix-table td {
    padding: 0.6rem 0.75rem;
    vertical-align: middle;
    text-align: center;
}

.tech-matrix-table td:first-child {
    text-align: left;
    font-weight: 500;
}

/* ── First Principles ──────────────────────────────────────── */

.principle-grid {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.principle-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.6rem 0;
    border-bottom: 1px solid var(--xs-border);
}

.principle-row:last-child {
    border-bottom: none;
}

.principle-info {
    display: flex;
    flex-direction: column;
    min-width: 220px;
    flex-shrink: 0;
}

.principle-name {
    font-weight: 600;
    color: var(--xs-text-bright);
    font-size: 0.95rem;
}

.principle-desc {
    font-size: 0.82rem;
    color: var(--xs-text-secondary);
    margin-top: 0.15rem;
}

.principle-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    justify-content: flex-end;
}

.principle-tag {
    font-size: 0.75rem;
    padding: 0.2rem 0.55rem;
    background: var(--xs-primary-subtle);
    color: var(--xs-primary-light);
    border-radius: var(--xs-radius-sm);
    white-space: nowrap;
}

@media (max-width: 768px) {
    .principle-row {
        flex-direction: column;
        align-items: flex-start;
    }
    .principle-tags {
        justify-content: flex-start;
    }
    .principle-info {
        min-width: unset;
    }
}

/* ── Portfolio Page ────────────────────────────────────── */

.portfolio-page {
    max-width: 960px;
}

/* Portrait stub — CSS initials circle, replaced with real image later */
.portrait-stub {
    width: 160px;
    height: 160px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--xs-primary), var(--xs-accent));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    font-weight: 700;
    color: #fff;
    margin: 0 auto 1.5rem;
    box-shadow: var(--xs-shadow-lg), 0 0 40px var(--xs-glow-color);
    letter-spacing: 0.05em;
    flex-shrink: 0;
}

/* Hero */
.portfolio-hero {
    text-align: center;
    padding: 3.5rem 0 2rem;
    border-bottom: 1px solid var(--xs-card-border);
    margin-bottom: 0;
}

.portfolio-hero h1 {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--xs-text-bright);
    margin-bottom: 0.25rem;
}

.portfolio-title {
    font-size: 1.2rem;
    color: var(--xs-accent);
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.portfolio-location {
    color: var(--xs-text-muted);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

.portfolio-social {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.portfolio-social a {
    color: var(--xs-text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color var(--xs-transition);
    display: inline-flex;
    align-items: center;
}

.portfolio-social a:hover {
    color: var(--xs-accent);
}

/* Project cards */
.portfolio-project-card {
    background: var(--xs-bg-card);
    border: 1px solid var(--xs-card-border);
    border-radius: var(--xs-radius);
    padding: 1.5rem;
    transition: transform var(--xs-transition), box-shadow var(--xs-transition), border-color var(--xs-transition);
    display: flex;
    flex-direction: column;
}

.portfolio-project-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--xs-shadow-md);
    border-color: var(--xs-border-subtle);
}

.portfolio-project-card p {
    color: var(--xs-text-secondary);
    line-height: 1.65;
}

.portfolio-project-stat {
    font-family: var(--xs-font-mono);
    font-size: 0.78rem;
    color: var(--xs-text-muted);
    margin-top: 0.75rem;
}

.portfolio-project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    color: var(--xs-accent);
    font-size: 0.82rem;
    font-family: var(--xs-font-mono);
    text-decoration: none;
    margin-top: 0.75rem;
    margin-top: auto;
    padding-top: 0.75rem;
}

.portfolio-project-link:hover {
    color: var(--xs-accent-hover);
    text-decoration: underline;
}

/* Timeline role/org/period/detail (portfolio-specific, overlays existing .timeline classes) */
.portfolio-role {
    font-weight: 700;
    color: var(--xs-text-bright);
}

.portfolio-org {
    font-weight: 400;
    color: var(--xs-text-secondary);
    font-size: 0.9em;
}

.portfolio-detail {
    font-size: 0.85rem;
    color: var(--xs-text-secondary);
    margin-top: 0.4rem;
    line-height: 1.6;
}

/* Skill categories */
.skill-category {
    margin-bottom: 1.25rem;
}

.skill-category-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--xs-text-muted);
    margin-bottom: 0.5rem;
    font-weight: 700;
    font-family: var(--xs-font-mono);
}

/* Connect cards */
.portfolio-connect-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.25rem;
    background: var(--xs-bg-card);
    border: 1px solid var(--xs-card-border);
    border-radius: var(--xs-radius);
    text-decoration: none;
    color: var(--xs-text);
    transition: transform var(--xs-transition), box-shadow var(--xs-transition), border-color var(--xs-transition);
}

.portfolio-connect-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--xs-shadow-md);
    border-color: var(--xs-border-subtle);
    color: var(--xs-text);
    text-decoration: none;
}

.portfolio-connect-icon {
    font-size: 1.5rem;
    color: var(--xs-accent);
    flex-shrink: 0;
}

/* Utility helpers used inline in Portfolio.razor */
.fw-700 { font-weight: 700; }
.text-bright { color: var(--xs-text-bright); }
.fs-5 { font-size: 1.25rem; }
.text-accent { color: var(--xs-accent); }

/* Mobile responsive — portfolio */
@media (max-width: 767.98px) {
    .portfolio-hero {
        padding: 2.5rem 0 1.5rem;
    }

    .portfolio-hero h1 {
        font-size: 2rem;
    }

    .portfolio-social {
        gap: 1rem;
    }
}

@media (max-width: 640.98px) {
    .portrait-stub {
        width: 120px;
        height: 120px;
        font-size: 2.25rem;
    }

    .portfolio-hero h1 {
        font-size: 1.75rem;
    }

    .portfolio-title {
        font-size: 1rem;
    }

    .portfolio-connect-card {
        padding: 1rem;
    }

    .portfolio-connect-icon {
        font-size: 1.25rem;
    }
}

/* ── Page-App Stubs ─────────────────────────────────── */
.page-app {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

.page-app-hero {
    text-align: center;
    margin-bottom: 3rem;
}

.page-app-hero h1 {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
}

.page-app-subtitle {
    font-size: 1.1rem;
    color: var(--xs-text-secondary);
}

.page-app-maintenance {
    text-align: center;
    padding: 4rem 2rem;
    background: var(--xs-bg-card);
    border: 1px solid var(--xs-border);
    border-radius: var(--xs-radius-lg);
}

.page-app-maintenance h2 {
    font-size: 1.5rem;
    margin: 1rem 0 0.5rem;
}

.page-app-maintenance p {
    color: var(--xs-text-secondary);
    margin-bottom: 1.5rem;
}

.maintenance-icon {
    font-size: 3rem;
    opacity: 0.6;
}

.maintenance-loader {
    width: 40px;
    height: 40px;
    border: 3px solid var(--xs-border);
    border-top-color: var(--xs-primary);
    border-radius: 50%;
    margin: 1rem auto;
    animation: spin 0.8s linear infinite;
}

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

.page-app-placeholder {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--xs-text-secondary);
}

.page-app-content {
    /* Container for actual app content when loaded */
}