/**
 * Shared component layer — yt2txt app
 * Inspired by landing (site/assets/css/styles.css). Ocean Depth system.
 *
 * All components are prefixed `.app-` to avoid collision with Tailwind utilities
 * and the sidebar `.sidebar-*` layer. Consume CSS custom properties exclusively;
 * never hardcode colors.
 */

/* -------------------------------------------------------------------------
   Base scaffold
   ------------------------------------------------------------------------- */

body {
    font-family: var(--font-body);
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    color: var(--text);
    font-weight: 700;
    letter-spacing: var(--ls-tight);
    line-height: 1.1;
}

/* -------------------------------------------------------------------------
   App shell — the common container that wraps every authed page
   ------------------------------------------------------------------------- */

.app-shell {
    min-height: 100vh;
    background: var(--bg);
}

.app-main {
    padding: clamp(1.5rem, 2vw + 1rem, 3rem) var(--gutter);
    max-width: var(--content-max);
    margin-inline: auto;
}

@media (min-width: 1024px) {
    .app-main {
        margin-left: var(--sidebar-width);
        max-width: none;
        padding-inline: clamp(2rem, 4vw, 4rem);
    }
}

/* Page header — dramatic left-aligned title, landing-style */
.app-page-header {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    margin-bottom: var(--space-2xl);
    max-width: 56rem;
}

.app-page-eyebrow {
    font-family: var(--font-display);
    font-size: var(--type-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: var(--ls-widest);
    color: var(--accent);
}

.app-page-title {
    font-family: var(--font-display);
    font-size: var(--type-3xl);
    font-weight: 800;
    letter-spacing: var(--ls-tighter);
    line-height: 1.05;
    color: var(--text);
    margin: 0;
}

.app-page-subtitle {
    font-family: var(--font-body);
    font-size: var(--type-lg);
    color: var(--text-secondary);
    max-width: 52ch;
    margin: 0;
    line-height: 1.5;
}

.app-page-header-row {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    justify-content: space-between;
    gap: var(--space-lg);
    margin-bottom: var(--space-2xl);
}

/* Section divider — landing-inspired, subtle */
.app-section {
    margin-top: var(--space-2xl);
}

.app-section-title {
    font-family: var(--font-display);
    font-size: var(--type-xl);
    font-weight: 700;
    letter-spacing: var(--ls-tight);
    color: var(--text);
    margin: 0 0 var(--space-lg);
}

.app-section-subtitle {
    font-family: var(--font-body);
    font-size: var(--type-sm);
    color: var(--text-secondary);
    margin: calc(-1 * var(--space-md)) 0 var(--space-lg);
}

/* -------------------------------------------------------------------------
   Cards — content-first, no heavy shadows
   ------------------------------------------------------------------------- */

.app-card {
    background: var(--surface);
    border: var(--border-w) solid var(--border);
    border-radius: var(--radius-lg);
    padding: clamp(1.25rem, 1rem + 1vw, 2rem);
    transition: border-color var(--duration-fast) var(--ease-out),
                box-shadow var(--duration-fast) var(--ease-out),
                transform var(--duration-fast) var(--ease-out);
}

.app-card-hover:hover {
    border-color: var(--border-strong);
    box-shadow: var(--shadow-sm);
    transform: translateY(-1px);
}

/* Hero card emphasis — tinted surface + full accent border instead of
   a left side-stripe. Side-stripes are an AI design tell; reach for a
   full container treatment instead. */
.app-card-accent {
    background: color-mix(in srgb, var(--accent) 4%, var(--surface));
    border-color: var(--accent-15);
}

.app-card-compact {
    padding: var(--space-lg);
}

.app-card-title {
    font-family: var(--font-display);
    font-size: var(--type-lg);
    font-weight: 700;
    letter-spacing: var(--ls-tight);
    color: var(--text);
    margin: 0 0 var(--space-xs);
}

.app-card-subtitle {
    font-family: var(--font-body);
    font-size: var(--type-sm);
    color: var(--text-secondary);
    margin: 0 0 var(--space-lg);
}

/* -------------------------------------------------------------------------
   KPI — dramatic scale. Number dominates; label whispers.
   ------------------------------------------------------------------------- */

.app-kpi {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.app-kpi-label {
    font-family: var(--font-body);
    font-size: var(--type-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: var(--ls-widest);
    color: var(--text-muted);
    margin: 0;
}

.app-kpi-value {
    font-family: var(--font-display);
    font-size: var(--type-4xl);
    font-weight: 800;
    letter-spacing: var(--ls-tighter);
    line-height: 1;
    color: var(--text);
    font-variant-numeric: tabular-nums;
    margin: 0;
}

.app-kpi-hint {
    font-family: var(--font-body);
    font-size: var(--type-sm);
    color: var(--text-secondary);
    margin: 0;
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.app-kpi-delta-positive { color: var(--success-text); }
.app-kpi-delta-negative { color: var(--error); }

/* KPI grid — bento asymmetry, not uniform */
.app-kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--space-lg);
}

.app-kpi-grid-bento {
    display: grid;
    gap: var(--space-lg);
    grid-template-columns: 1fr;
}

@media (min-width: 640px) {
    .app-kpi-grid-bento {
        grid-template-columns: 1fr 1fr;
    }
    .app-kpi-grid-bento > :first-child {
        grid-column: span 2;
    }
}

@media (min-width: 1024px) {
    .app-kpi-grid-bento {
        grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1fr);
    }
    .app-kpi-grid-bento > :first-child {
        grid-column: auto;
    }
}

/* -------------------------------------------------------------------------
   Buttons — primary, ghost, danger. Landing uses restrained solid buttons.
   ------------------------------------------------------------------------- */

.app-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    font-family: var(--font-body);
    font-size: var(--type-sm);
    font-weight: 600;
    letter-spacing: var(--ls-snug);
    padding: 0.625rem 1.125rem;
    border-radius: var(--radius-sm);
    border: var(--border-w) solid transparent;
    cursor: pointer;
    text-decoration: none;
    white-space: nowrap;
    transition: background var(--duration-fast) var(--ease-out),
                border-color var(--duration-fast) var(--ease-out),
                color var(--duration-fast) var(--ease-out),
                transform var(--duration-fast) var(--ease-out);
    user-select: none;
}

.app-btn:disabled,
.app-btn[disabled] {
    opacity: 0.5;
    cursor: not-allowed;
}

.app-btn:not(:disabled):active {
    transform: translateY(1px);
}

.app-btn-primary {
    background: var(--accent);
    color: var(--accent-contrast);
    border-color: var(--accent);
}

.app-btn-primary:not(:disabled):hover {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
}

.app-btn-ghost {
    background: transparent;
    color: var(--text);
    border-color: var(--border);
}

.app-btn-ghost:not(:disabled):hover {
    background: var(--surface-alt);
    border-color: var(--border-strong);
}

.app-btn-danger {
    background: transparent;
    color: var(--error);
    border-color: var(--border);
}

.app-btn-danger:not(:disabled):hover {
    background: var(--error-soft);
    border-color: var(--error);
}

.app-btn-text {
    background: transparent;
    color: var(--accent);
    border-color: transparent;
    padding-inline: var(--space-sm);
}

.app-btn-text:not(:disabled):hover {
    color: var(--accent-hover);
    background: var(--accent-soft);
}

.app-btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: var(--type-xs);
}

.app-btn-lg {
    padding: 0.875rem 1.5rem;
    font-size: var(--type-base);
}

/* -------------------------------------------------------------------------
   Inputs & forms
   ------------------------------------------------------------------------- */

.app-field {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.app-label {
    font-family: var(--font-body);
    font-size: var(--type-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: var(--ls-wider);
    color: var(--text-secondary);
}

.app-input,
.app-select,
.app-textarea {
    font-family: var(--font-body);
    font-size: var(--type-base);
    color: var(--text);
    background: var(--surface);
    border: var(--border-w) solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.625rem 0.875rem;
    width: 100%;
    transition: border-color var(--duration-fast) var(--ease-out),
                box-shadow var(--duration-fast) var(--ease-out);
}

.app-input::placeholder,
.app-textarea::placeholder {
    color: var(--text-muted);
}

.app-input:focus,
.app-select:focus,
.app-textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-15);
}

.app-input[readonly] {
    background: var(--surface-alt);
    color: var(--text-secondary);
    cursor: default;
}

.app-textarea {
    resize: vertical;
    min-height: 7rem;
    font-family: var(--font-body);
    line-height: 1.5;
}

.app-help {
    font-size: var(--type-xs);
    color: var(--text-muted);
    margin: 0;
}

/* -------------------------------------------------------------------------
   Tables — landing doesn't have tables; derive from card conventions
   ------------------------------------------------------------------------- */

.app-table-wrap {
    background: var(--surface);
    border: var(--border-w) solid var(--border);
    border-radius: var(--radius-lg);
    overflow-x: auto;
}

.app-table {
    width: 100%;
    border-collapse: collapse;
    font-family: var(--font-body);
    font-size: var(--type-sm);
}

.app-table thead th {
    text-align: left;
    font-family: var(--font-body);
    font-size: var(--type-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: var(--ls-widest);
    color: var(--text-muted);
    padding: var(--space-md) var(--space-lg);
    background: var(--surface-alt);
    border-bottom: var(--border-w) solid var(--border);
    white-space: nowrap;
}

.app-table tbody td {
    padding: var(--space-md) var(--space-lg);
    border-bottom: var(--border-w) solid var(--border);
    color: var(--text);
    vertical-align: middle;
}

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

.app-table tbody tr {
    transition: background var(--duration-fast) var(--ease-out);
}

.app-table tbody tr:hover {
    background: var(--surface-alt);
}

.app-table-empty {
    text-align: center;
    padding: var(--space-2xl);
    color: var(--text-muted);
    font-size: var(--type-sm);
}

/* -------------------------------------------------------------------------
   Badges — pills for status / tier / admin
   ------------------------------------------------------------------------- */

.app-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    font-family: var(--font-body);
    font-size: var(--type-xs);
    font-weight: 600;
    letter-spacing: var(--ls-wide);
    padding: 0.25rem 0.625rem;
    border-radius: 999px;
    border: var(--border-w) solid transparent;
    white-space: nowrap;
}

.app-badge-neutral {
    background: var(--surface-alt);
    color: var(--text-secondary);
    border-color: var(--border);
}

.app-badge-accent {
    background: var(--accent-soft);
    color: var(--accent);
    border-color: var(--accent-15);
}

.app-badge-success {
    background: var(--success-soft);
    color: var(--success-text);
    border-color: color-mix(in srgb, var(--success) 20%, transparent);
}

.app-badge-warning {
    background: var(--warning-soft);
    color: var(--warning-text);
    border-color: color-mix(in srgb, var(--warning) 25%, transparent);
}

.app-badge-error {
    background: var(--error-soft);
    color: var(--error);
    border-color: color-mix(in srgb, var(--error) 25%, transparent);
}

.app-badge-dot::before {
    content: '';
    width: 0.375rem;
    height: 0.375rem;
    border-radius: 999px;
    background: currentColor;
}

/* -------------------------------------------------------------------------
   Progress bars — thin, tinted, aligned with landing
   ------------------------------------------------------------------------- */

.app-progress {
    position: relative;
    width: 100%;
    height: 6px;
    background: var(--surface-alt);
    border-radius: 999px;
    overflow: hidden;
}

.app-progress-fill {
    height: 100%;
    background: var(--accent);
    border-radius: inherit;
    transition: width var(--duration-slow) var(--ease-out);
}

.app-progress-success .app-progress-fill { background: var(--success); }
.app-progress-warning .app-progress-fill { background: var(--warning); }
.app-progress-error .app-progress-fill   { background: var(--error); }

.app-progress-label {
    display: flex;
    justify-content: space-between;
    font-family: var(--font-body);
    font-size: var(--type-xs);
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--space-xs);
}

.app-progress-label-value {
    font-variant-numeric: tabular-nums;
    color: var(--text);
}

/* -------------------------------------------------------------------------
   Modal — replaces native confirm()/prompt(); backdrop-blur overlay
   ------------------------------------------------------------------------- */

.app-modal-backdrop {
    position: fixed;
    inset: 0;
    background: color-mix(in srgb, var(--bg) 70%, transparent);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--gutter);
    z-index: var(--z-dropdown);
}

.app-modal {
    background: var(--surface);
    border: var(--border-w) solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 32rem;
    padding: clamp(1.5rem, 1.2rem + 1vw, 2rem);
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    max-height: calc(100vh - 4rem);
    overflow-y: auto;
}

.app-modal-lg { max-width: 44rem; }

.app-modal-header {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.app-modal-title {
    font-family: var(--font-display);
    font-size: var(--type-xl);
    font-weight: 700;
    letter-spacing: var(--ls-tight);
    color: var(--text);
    margin: 0;
}

.app-modal-subtitle {
    font-size: var(--type-sm);
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.5;
}

.app-modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

/* -------------------------------------------------------------------------
   Alerts / banners — aligned with landing warning cards
   ------------------------------------------------------------------------- */

.app-alert {
    display: flex;
    gap: var(--space-md);
    padding: var(--space-lg);
    border: var(--border-w) solid var(--border);
    border-radius: var(--radius-md);
    background: var(--surface);
}

.app-alert-icon {
    flex-shrink: 0;
    width: 2rem;
    height: 2rem;
    border-radius: 999px;
    display: grid;
    place-items: center;
    background: var(--accent-soft);
    color: var(--accent);
}

.app-alert-body {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    min-width: 0;
    flex: 1;
}

.app-alert-title {
    font-family: var(--font-display);
    font-size: var(--type-base);
    font-weight: 700;
    color: var(--text);
    margin: 0;
}

.app-alert-message {
    font-size: var(--type-sm);
    color: var(--text-secondary);
    line-height: 1.5;
    margin: 0;
}

.app-alert-warning {
    background: var(--warning-soft);
    border-color: color-mix(in srgb, var(--warning) 30%, transparent);
}
.app-alert-warning .app-alert-icon {
    background: color-mix(in srgb, var(--warning) 15%, transparent);
    color: var(--warning-text);
}
.app-alert-warning .app-alert-title { color: var(--warning-text); }

.app-alert-error {
    background: var(--error-soft);
    border-color: color-mix(in srgb, var(--error) 30%, transparent);
}
.app-alert-error .app-alert-icon {
    background: color-mix(in srgb, var(--error) 15%, transparent);
    color: var(--error);
}
.app-alert-error .app-alert-title { color: var(--error); }

.app-alert-success {
    background: var(--success-soft);
    border-color: color-mix(in srgb, var(--success) 30%, transparent);
}
.app-alert-success .app-alert-icon {
    background: color-mix(in srgb, var(--success) 15%, transparent);
    color: var(--success-text);
}
.app-alert-success .app-alert-title { color: var(--success-text); }

/* -------------------------------------------------------------------------
   Layout utilities — bento grids, asymmetric splits
   ------------------------------------------------------------------------- */

.app-grid-2 {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-lg);
}

@media (min-width: 900px) {
    .app-grid-2 { grid-template-columns: 1fr 1fr; }
    .app-grid-2-asym { grid-template-columns: 1.6fr 1fr; }
}

.app-grid-3 {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-lg);
}

@media (min-width: 768px)  { .app-grid-3 { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1100px) { .app-grid-3 { grid-template-columns: repeat(3, 1fr); } }

.app-stack {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.app-stack-sm { gap: var(--space-sm); }
.app-stack-md { gap: var(--space-md); }
.app-stack-xl { gap: var(--space-xl); }

.app-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-md);
}

.app-row-between {
    justify-content: space-between;
}

/* -------------------------------------------------------------------------
   Icon landmarks — landing uses soft blue circles for accents
   ------------------------------------------------------------------------- */

.app-icon-landmark {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: var(--radius-sm);
    display: grid;
    place-items: center;
    background: var(--accent-soft);
    color: var(--accent);
    flex-shrink: 0;
}

.app-icon-landmark svg {
    width: 1.25rem;
    height: 1.25rem;
}

.app-icon-landmark-success {
    background: var(--success-soft);
    color: var(--success-text);
}

.app-icon-landmark-warning {
    background: var(--warning-soft);
    color: var(--warning-text);
}

.app-icon-landmark-error {
    background: var(--error-soft);
    color: var(--error);
}

/* -------------------------------------------------------------------------
   Motion — staggered entrance, matches landing reveals
   ------------------------------------------------------------------------- */

@keyframes app-fade-up {
    from { opacity: 0; transform: translateY(12px); }
    to   { opacity: 1; transform: translateY(0); }
}

.app-reveal {
    animation: app-fade-up var(--duration-slow) var(--ease-out) both;
}

.app-reveal-1 { animation-delay: 40ms; }
.app-reveal-2 { animation-delay: 80ms; }
.app-reveal-3 { animation-delay: 120ms; }
.app-reveal-4 { animation-delay: 160ms; }
.app-reveal-5 { animation-delay: 200ms; }
.app-reveal-6 { animation-delay: 240ms; }

@media (prefers-reduced-motion: reduce) {
    .app-reveal { animation: none; }
}

/* -------------------------------------------------------------------------
   Utility overrides
   ------------------------------------------------------------------------- */

.app-muted  { color: var(--text-muted); }
.app-subtle { color: var(--text-secondary); }

.app-num {
    font-variant-numeric: tabular-nums;
    font-family: var(--font-display);
}

.app-divider {
    border: none;
    border-top: var(--border-w) solid var(--border);
    margin: var(--space-xl) 0;
}