/* ==========================================================================
   Midnight Meridian — Tracking Platform
   A dark analytics interface. Sharp edges, mono data, cyan accents.

   Table of contents
   01. Design tokens
   02. Reset & base
   03. Background grain
   04. Typography
   05. App shell & sidebar
   06. Topbar & breadcrumb
   07. Page header
   08. Buttons
   09. Cards & panels
   10. Stat cards
   11. Tables
   12. Forms
   13. Badges & tags
   14. Toggle switch
   15. Flash messages
   16. Modal / dialog
   17. Charts
   18. A/B comparison
   19. Pagination
   20. Copy button / snippet
   21. Loading states
   22. Login page
   23. Empty states
   24. Animations
   25. Scrollbars
   26. Responsive
   27. Print
   ========================================================================== */

/* 01. Design tokens ------------------------------------------------------- */
:root {
    --base: #09090b;
    --surface-1: #18181b;
    --surface-2: #27272a;
    --border: #3f3f46;
    --border-soft: #27272a;

    --primary: #06b6d4;
    --primary-deep: #0e7490;
    --primary-glow: rgba(6, 182, 212, 0.15);
    --secondary: #f97316;
    --secondary-glow: rgba(249, 115, 22, 0.15);
    --success: #22c55e;
    --danger: #ef4444;

    --text: #fafafa;
    --muted: #a1a1aa;
    --dimmed: #71717a;

    --font-sans: "Manrope", system-ui, -apple-system, "Segoe UI", sans-serif;
    --font-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

    --sidebar-w: 264px;
    --content-max: 1240px;
    --ease: cubic-bezier(0.4, 0, 0.2, 1);
    --speed: 200ms;

    --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-pop: 0 24px 64px -16px rgba(0, 0, 0, 0.7);
    --shadow-glow: 0 0 0 1px var(--primary), 0 8px 32px -8px var(--primary-glow);

    color-scheme: dark;
}

/* 01b. Light theme tokens -------------------------------------------------
   Dark is the default (defined on :root above). The light theme re-maps the
   same custom properties; component rules stay untouched. A handful of
   components hard-code dark values — those get explicit overrides below the
   token map. */
[data-theme="light"] {
    color-scheme: light;

    --base: #f8f9fa;
    --surface-1: #ffffff;
    --surface-2: #f1f3f5;
    --border: #e5e7eb;
    --border-soft: #eef1f4;

    --primary: #0891b2;
    --primary-deep: #0e7490;
    --primary-glow: rgba(6, 182, 212, 0.12);
    --secondary: #ea580c;
    --secondary-glow: rgba(234, 88, 12, 0.1);
    --success: #16a34a;
    --danger: #dc2626;

    --text: #1a1a2e;
    --muted: #6b7280;
    --dimmed: #9ca3af;

    --shadow-card: 0 1px 2px rgba(16, 24, 40, 0.06), 0 1px 3px rgba(16, 24, 40, 0.05);
    --shadow-pop: 0 24px 64px -16px rgba(16, 24, 40, 0.22);
    --shadow-glow: 0 0 0 1px var(--primary), 0 8px 32px -8px var(--primary-glow);
}

/* Light theme — overrides for components with hard-coded dark colors */
[data-theme="light"] a:hover {
    color: var(--primary-deep);
}

[data-theme="light"] .sidebar {
    background: linear-gradient(180deg, #ffffff, #f4f6f8);
    border-right-color: var(--border);
}

[data-theme="light"] .topbar {
    background: rgba(255, 255, 255, 0.78);
    border-bottom-color: var(--border);
}

[data-theme="light"] input:focus,
[data-theme="light"] select:focus,
[data-theme="light"] textarea:focus {
    background: #ffffff;
}

[data-theme="light"] .data-table tbody tr:nth-child(even) {
    background: #f9fafb;
}

[data-theme="light"] .data-table tbody tr:hover {
    background: rgba(6, 182, 212, 0.07);
}

[data-theme="light"] .empty-state {
    background: #fcfcfd;
}

[data-theme="light"] .auth-card {
    background: rgba(255, 255, 255, 0.82);
}

[data-theme="light"] .modal-backdrop {
    background: rgba(16, 24, 40, 0.35);
}

[data-theme="light"] .form-error {
    color: #b91c1c;
    background: rgba(220, 38, 38, 0.08);
    border-color: rgba(220, 38, 38, 0.3);
}

[data-theme="light"] .badge-bot {
    color: #b91c1c;
}

[data-theme="light"] ::-webkit-scrollbar-thumb {
    background: #d1d5db;
    border-color: var(--base);
}

/* Smooth theme transition for surfaces that don't define their own */
body,
.sidebar,
.topbar,
.app-footer,
.panel,
.variant-card,
.controls-bar,
.modal,
.empty-state,
.data-table thead th,
.badge,
.snippet,
.stat-icon,
.count-chip,
.user-avatar,
.nav-section-label,
.form-error {
    transition: background-color var(--speed) var(--ease),
        border-color var(--speed) var(--ease), color var(--speed) var(--ease);
}

/* 02. Reset & base -------------------------------------------------------- */
*,
*::before,
*::after {
    box-sizing: border-box;
    border-radius: 0;
}

html {
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

body {
    margin: 0;
    min-height: 100vh;
    background-color: var(--base);
    color: var(--text);
    font-family: var(--font-sans);
    font-size: 15px;
    line-height: 1.55;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    letter-spacing: 0.01em;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--speed) var(--ease);
}

a:hover {
    color: #22d3ee;
}

img {
    max-width: 100%;
    display: block;
}

button {
    font-family: inherit;
}

:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

::selection {
    background: var(--primary-glow);
    color: var(--text);
}

.hidden {
    display: none !important;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* 03. Background grain ----------------------------------------------------- */
body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    opacity: 0.035;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* Aurora wash behind everything */
body::after {
    content: "";
    position: fixed;
    top: -20%;
    left: -10%;
    width: 70%;
    height: 60%;
    z-index: 0;
    pointer-events: none;
    background: radial-gradient(closest-side, var(--primary-glow), transparent 70%);
    opacity: 0.6;
    filter: blur(40px);
}

/* 04. Typography ---------------------------------------------------------- */
h1,
h2,
h3,
h4 {
    margin: 0;
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.15;
    color: var(--text);
}

h1 {
    font-size: clamp(1.75rem, 1.2rem + 1.6vw, 2.4rem);
}

h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

h3 {
    font-size: 1.05rem;
    font-weight: 600;
}

p {
    margin: 0 0 0.75rem;
}

p:last-child {
    margin-bottom: 0;
}

code,
.mono {
    font-family: var(--font-mono);
    font-feature-settings: "zero" 1;
}

.muted {
    color: var(--muted);
}

.dimmed {
    color: var(--dimmed);
}

.small {
    font-size: 0.8rem;
}

.eyebrow {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--dimmed);
}

/* 05. App shell & sidebar ------------------------------------------------- */
.app-shell {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: var(--sidebar-w) 1fr;
    min-height: 100vh;
}

.sidebar {
    position: sticky;
    top: 0;
    align-self: start;
    height: 100vh;
    display: flex;
    flex-direction: column;
    background: linear-gradient(180deg, var(--surface-1), #121214);
    border-right: 1px solid var(--border);
    padding: 1.75rem 1.25rem;
    z-index: 30;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    padding: 0 0.4rem 1.75rem;
    color: var(--text);
}

.sidebar-brand:hover {
    color: var(--text);
}

.brand-mark {
    flex: 0 0 auto;
    width: 34px;
    height: 34px;
    display: grid;
    place-items: center;
    background: var(--base);
    border: 1px solid var(--primary);
    box-shadow: inset 0 0 16px -6px var(--primary), 0 0 18px -8px var(--primary);
    position: relative;
}

.brand-mark::before {
    content: "";
    width: 9px;
    height: 9px;
    background: var(--primary);
    box-shadow: 0 0 12px 1px var(--primary);
}

.brand-text {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}

.brand-text strong {
    font-size: 0.98rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.brand-text span {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--dimmed);
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    margin-top: 0.5rem;
}

.nav-section-label {
    padding: 1.25rem 0.6rem 0.4rem;
    font-family: var(--font-mono);
    font-size: 0.6rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--dimmed);
}

.nav-link {
    position: relative;
    display: flex;
    align-items: center;
    gap: 0.7rem;
    padding: 0.6rem 0.7rem;
    color: var(--muted);
    font-weight: 500;
    font-size: 0.9rem;
    transition: color var(--speed) var(--ease), background var(--speed) var(--ease);
}

.nav-link svg {
    width: 17px;
    height: 17px;
    flex: 0 0 auto;
    stroke: currentColor;
}

.nav-link:hover {
    color: var(--text);
    background: var(--surface-2);
}

.nav-link.active {
    color: var(--text);
    background: linear-gradient(90deg, var(--primary-glow), transparent);
}

.nav-link.active::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 60%;
    background: var(--primary);
    box-shadow: 0 0 10px 0 var(--primary);
}

/* Theme toggle — styled as a nav link but it's a button */
.theme-toggle {
    width: 100%;
    margin-top: 0.4rem;
    background: transparent;
    border: 1px solid var(--border-soft);
    text-align: left;
    cursor: pointer;
    font-family: inherit;
}

.theme-toggle:hover {
    color: var(--text);
    background: var(--surface-2);
    border-color: var(--border);
}

.theme-toggle .theme-toggle-icon {
    width: 17px;
    text-align: center;
    font-size: 1rem;
    line-height: 1;
    flex: 0 0 auto;
    color: var(--primary);
}

.sidebar-footer {
    margin-top: auto;
    padding-top: 1.25rem;
    border-top: 1px solid var(--border-soft);
}

.user-chip {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    padding: 0.5rem 0.4rem;
}

.user-avatar {
    flex: 0 0 auto;
    width: 32px;
    height: 32px;
    display: grid;
    place-items: center;
    background: var(--surface-2);
    border: 1px solid var(--border);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
}

.user-meta {
    min-width: 0;
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.user-meta strong {
    font-size: 0.85rem;
    font-weight: 600;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.user-meta span {
    font-size: 0.7rem;
    color: var(--dimmed);
}

.logout-form {
    margin-top: 0.5rem;
}

.logout-form .btn {
    width: 100%;
    justify-content: center;
}

/* mobile hamburger - hidden on desktop */
.sidebar-toggle {
    display: none;
}

/* 06. Topbar & breadcrumb ------------------------------------------------- */
.app-main {
    display: flex;
    flex-direction: column;
    min-width: 0;
    min-height: 100vh;
}

.topbar {
    position: sticky;
    top: 0;
    z-index: 20;
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0 clamp(1rem, 3vw, 2.5rem);
    height: 60px;
    background: rgba(9, 9, 11, 0.72);
    backdrop-filter: blur(14px) saturate(140%);
    -webkit-backdrop-filter: blur(14px) saturate(140%);
    border-bottom: 1px solid var(--border-soft);
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--muted);
    font-family: var(--font-mono);
    overflow: hidden;
    white-space: nowrap;
}

.breadcrumb a {
    color: var(--muted);
}

.breadcrumb a:hover {
    color: var(--primary);
}

.breadcrumb .sep {
    color: var(--dimmed);
    user-select: none;
}

.breadcrumb .current {
    color: var(--text);
    overflow: hidden;
    text-overflow: ellipsis;
}

.topbar-actions {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.topbar-status {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--dimmed);
}

.topbar-status .dot {
    width: 7px;
    height: 7px;
    background: var(--success);
    box-shadow: 0 0 8px 0 var(--success);
    animation: pulse 2.4s var(--ease) infinite;
}

/* 07. Page header --------------------------------------------------------- */
.content {
    flex: 1;
    width: 100%;
    max-width: var(--content-max);
    margin: 0 auto;
    padding: clamp(1.5rem, 3vw, 2.75rem) clamp(1rem, 3vw, 2.5rem) 4rem;
}

.page-header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 1.5rem;
    flex-wrap: wrap;
    margin-bottom: 2rem;
    animation: fadeUp 0.5s var(--ease) both;
}

.page-header h1 {
    margin-top: 0.35rem;
}

.page-header .muted {
    max-width: 56ch;
}

.page-actions {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    flex-wrap: wrap;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.04em;
    color: var(--dimmed);
}

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

.meta-row {
    display: flex;
    flex-wrap: wrap;
    gap: 1.25rem;
    margin-top: 0.6rem;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--dimmed);
}

.meta-row span strong {
    color: var(--muted);
    font-weight: 500;
}

/* 08. Buttons ------------------------------------------------------------- */
.btn {
    --btn-bg: var(--surface-2);
    --btn-fg: var(--text);
    --btn-bd: var(--border);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    padding: 0.6rem 1.1rem;
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.01em;
    line-height: 1;
    color: var(--btn-fg);
    background: var(--btn-bg);
    border: 1px solid var(--btn-bd);
    cursor: pointer;
    white-space: nowrap;
    transition: transform var(--speed) var(--ease), background var(--speed) var(--ease),
        border-color var(--speed) var(--ease), box-shadow var(--speed) var(--ease),
        color var(--speed) var(--ease), opacity var(--speed) var(--ease);
}

.btn:hover {
    transform: translateY(-1px);
    border-color: var(--dimmed);
}

.btn:active {
    transform: translateY(0);
}

.btn svg {
    width: 15px;
    height: 15px;
    stroke: currentColor;
}

.btn.small {
    padding: 0.4rem 0.7rem;
    font-size: 0.76rem;
}

.btn-primary {
    --btn-bg: var(--primary);
    --btn-fg: #04181d;
    --btn-bd: var(--primary);
    box-shadow: 0 0 0 0 var(--primary-glow);
}

.btn-primary:hover {
    --btn-bg: #22d3ee;
    border-color: #22d3ee;
    box-shadow: 0 8px 24px -8px var(--primary-glow), 0 0 16px -4px var(--primary-glow);
}

.btn-secondary {
    --btn-bg: var(--secondary);
    --btn-fg: #1c0a02;
    --btn-bd: var(--secondary);
}

.btn-secondary:hover {
    --btn-bg: #fb923c;
    border-color: #fb923c;
}

.btn-ghost {
    --btn-bg: transparent;
    --btn-fg: var(--muted);
    --btn-bd: var(--border);
}

.btn-ghost:hover {
    --btn-fg: var(--text);
    background: var(--surface-2);
}

.btn-danger {
    --btn-bg: transparent;
    --btn-fg: var(--danger);
    --btn-bd: rgba(239, 68, 68, 0.4);
}

.btn-danger:hover {
    background: rgba(239, 68, 68, 0.12);
    border-color: var(--danger);
}

.btn-group {
    display: flex;
    gap: 0.25rem;
    flex-wrap: nowrap;
}

.btn[disabled],
.btn.is-loading {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn.is-loading {
    position: relative;
    color: transparent;
}

.btn.is-loading::after {
    content: "";
    position: absolute;
    width: 14px;
    height: 14px;
    border: 2px solid currentColor;
    border-top-color: transparent;
    color: var(--btn-fg);
    animation: spin 0.6s linear infinite;
}

.inline-form {
    display: inline;
    margin: 0;
}

/* 09. Cards & panels ------------------------------------------------------ */
.card {
    position: relative;
    background: var(--surface-1);
    border: 1px solid var(--border-soft);
    padding: 1.5rem;
    box-shadow: var(--shadow-card);
    transition: background-color var(--speed) var(--ease), border-color var(--speed) var(--ease),
        transform var(--speed) var(--ease), box-shadow var(--speed) var(--ease);
}

/* gradient border revealed on hover */
.card::before {
    content: "";
    position: absolute;
    inset: 0;
    padding: 1px;
    background: linear-gradient(135deg, var(--primary), var(--primary-deep) 60%, transparent);
    -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity var(--speed) var(--ease);
    pointer-events: none;
}

.card:hover::before {
    opacity: 1;
}

.panel {
    position: relative;
    background: var(--surface-1);
    border: 1px solid var(--border-soft);
    padding: clamp(1.25rem, 2vw, 1.75rem);
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-card);
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 1.25rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-soft);
}

.panel-header h2 {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.panel-header .count-chip {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--primary);
    padding: 0.15rem 0.45rem;
    border: 1px solid var(--border);
    background: var(--base);
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.25rem;
}

.grid-cards {
    grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
}

.split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    align-items: start;
}

/* Project card */
.project-card {
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
    color: var(--text);
    min-height: 158px;
}

.project-card:hover {
    color: var(--text);
    transform: translateY(-3px);
}

.project-card h3 {
    font-size: 1.1rem;
}

.project-card .card-desc {
    color: var(--muted);
    font-size: 0.88rem;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.project-card .card-stats {
    display: flex;
    gap: 1.4rem;
    margin-top: 0.4rem;
    padding-top: 0.9rem;
    border-top: 1px solid var(--border-soft);
}

.project-card .card-stats .figure {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}

.project-card .card-stats .figure b {
    font-family: var(--font-mono);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text);
}

.project-card .card-stats .figure span {
    font-size: 0.66rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--dimmed);
}

.project-card .card-foot {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.project-card .card-foot-meta {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.card-archive {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    padding: 0;
    border: 1px solid transparent;
    border-radius: 8px;
    background: transparent;
    color: var(--dimmed);
    cursor: pointer;
    opacity: 0;
    transition: opacity var(--speed) var(--ease), color var(--speed) var(--ease),
        background var(--speed) var(--ease), border-color var(--speed) var(--ease);
}

.project-card:hover .card-archive,
.card-archive:focus-visible {
    opacity: 1;
}

.card-archive:hover {
    color: var(--danger);
    background: rgba(239, 68, 68, 0.12);
    border-color: rgba(239, 68, 68, 0.4);
}

.project-card.archived {
    opacity: 0.55;
}

.project-card .arrow {
    color: var(--dimmed);
    transition: transform var(--speed) var(--ease), color var(--speed) var(--ease);
}

.project-card:hover .arrow {
    color: var(--primary);
    transform: translateX(3px);
}

/* 10. Stat cards ---------------------------------------------------------- */
.stat-card {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: 1.35rem 1.4rem;
    overflow: hidden;
}

.stat-card .stat-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
}

.stat-label {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--dimmed);
}

.stat-icon {
    width: 28px;
    height: 28px;
    display: grid;
    place-items: center;
    border: 1px solid var(--border-soft);
    background: var(--base);
    color: var(--primary);
}

.stat-icon svg {
    width: 15px;
    height: 15px;
    stroke: currentColor;
}

.stat-value {
    font-family: var(--font-mono);
    font-size: clamp(1.9rem, 1.2rem + 1.6vw, 2.6rem);
    font-weight: 600;
    line-height: 1;
    color: var(--primary);
    letter-spacing: -0.02em;
    font-feature-settings: "tnum" 1;
}

.stat-card.accent-orange .stat-value {
    color: var(--secondary);
}

.stat-card.accent-orange .stat-icon {
    color: var(--secondary);
}

.stat-card.highlight {
    border-color: var(--border);
}

.stat-card.highlight::before {
    opacity: 0.5;
}

.stat-sub {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.76rem;
    color: var(--muted);
    font-family: var(--font-mono);
}

.trend {
    display: inline-flex;
    align-items: center;
    gap: 0.2rem;
    font-weight: 600;
}

.trend.up {
    color: var(--success);
}

.trend.down {
    color: var(--danger);
}

.trend.flat {
    color: var(--dimmed);
}

/* 11. Tables -------------------------------------------------------------- */
.table-wrap {
    width: 100%;
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.86rem;
}

.data-table thead th {
    position: sticky;
    top: 0;
    text-align: left;
    padding: 0.7rem 0.9rem;
    font-family: var(--font-mono);
    font-size: 0.66rem;
    font-weight: 500;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--dimmed);
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
    background: var(--surface-1);
}

.data-table tbody td {
    padding: 0.8rem 0.9rem;
    border-bottom: 1px solid var(--border-soft);
    vertical-align: middle;
}

.data-table tbody tr {
    transition: background var(--speed) var(--ease);
}

.data-table tbody tr:nth-child(even) {
    background: rgba(255, 255, 255, 0.012);
}

.data-table tbody tr:hover {
    background: var(--primary-glow);
}

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

.data-table .num {
    font-family: var(--font-mono);
    font-feature-settings: "tnum" 1;
    text-align: right;
}

.data-table .truncate {
    max-width: 260px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.data-table .actions {
    display: flex;
    gap: 0.4rem;
    justify-content: flex-end;
}

.scroll-table {
    max-height: 460px;
    overflow-y: auto;
}

/* 12. Forms --------------------------------------------------------------- */
.form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form h2 {
    margin-bottom: 0.25rem;
}

.field {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.field > span,
.field > label {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--muted);
    letter-spacing: 0.01em;
}

.field-inline {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    cursor: pointer;
    font-size: 0.85rem;
    color: var(--muted);
    user-select: none;
}

input[type="text"],
input[type="url"],
input[type="password"],
input[type="email"],
input[type="number"],
input[type="date"],
input[type="datetime-local"],
select,
textarea {
    width: 100%;
    padding: 0.62rem 0.8rem;
    font-family: var(--font-sans);
    font-size: 0.88rem;
    color: var(--text);
    background: var(--base);
    border: 1px solid var(--border);
    transition: border-color var(--speed) var(--ease), box-shadow var(--speed) var(--ease),
        background var(--speed) var(--ease);
}

textarea {
    resize: vertical;
    min-height: 80px;
    line-height: 1.5;
}

input.mono,
textarea.mono,
.setting-input,
input[type="datetime-local"],
input[type="date"] {
    font-family: var(--font-mono);
    font-size: 0.82rem;
}

input::placeholder,
textarea::placeholder {
    color: var(--dimmed);
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
    background: #0d0d10;
}

select {
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='none' stroke='%2371717a' stroke-width='2'%3E%3Cpath d='M2 4l4 4 4-4'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.8rem center;
    padding-right: 2.2rem;
    cursor: pointer;
}

input[type="checkbox"] {
    appearance: none;
    -webkit-appearance: none;
    width: 17px;
    height: 17px;
    flex: 0 0 auto;
    background: var(--base);
    border: 1px solid var(--border);
    display: grid;
    place-items: center;
    cursor: pointer;
    transition: border-color var(--speed) var(--ease), background var(--speed) var(--ease);
}

input[type="checkbox"]:checked {
    background: var(--primary);
    border-color: var(--primary);
}

input[type="checkbox"]:checked::after {
    content: "";
    width: 9px;
    height: 5px;
    border: 2px solid #04181d;
    border-top: 0;
    border-right: 0;
    transform: rotate(-45deg) translateY(-1px);
}

input[type="file"] {
    width: 100%;
    font-size: 0.82rem;
    color: var(--muted);
    padding: 0.5rem 0;
}

input[type="file"]::file-selector-button {
    margin-right: 0.8rem;
    padding: 0.5rem 0.9rem;
    font-family: var(--font-sans);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text);
    background: var(--surface-2);
    border: 1px solid var(--border);
    cursor: pointer;
    transition: border-color var(--speed) var(--ease);
}

input[type="file"]::file-selector-button:hover {
    border-color: var(--primary);
}

.form-error {
    padding: 0.65rem 0.85rem;
    font-size: 0.82rem;
    color: #fecaca;
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.35);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
}

.field-row {
    display: flex;
    gap: 0.6rem;
    align-items: center;
}

/* Floating-label field (login) */
.float-field {
    position: relative;
}

.float-field input {
    padding: 1.35rem 0.85rem 0.5rem;
}

.float-field label {
    position: absolute;
    top: 0.85rem;
    left: 0.85rem;
    font-size: 0.88rem;
    color: var(--dimmed);
    pointer-events: none;
    transform-origin: left top;
    transition: transform var(--speed) var(--ease), color var(--speed) var(--ease);
}

.float-field input:focus + label,
.float-field input:not(:placeholder-shown) + label {
    transform: translateY(-0.6rem) scale(0.74);
    color: var(--primary);
}

/* 13. Badges & tags ------------------------------------------------------- */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.2rem 0.55rem;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--muted);
    background: var(--surface-2);
    border: 1px solid var(--border);
    white-space: nowrap;
}

.badge.dot::before {
    content: "";
    width: 6px;
    height: 6px;
    background: currentColor;
}

.badge-variant-a {
    color: var(--primary);
    background: var(--primary-glow);
    border-color: rgba(6, 182, 212, 0.4);
}

.badge-variant-b {
    color: var(--secondary);
    background: var(--secondary-glow);
    border-color: rgba(249, 115, 22, 0.4);
}

.badge-open {
    color: var(--primary);
    border-color: rgba(6, 182, 212, 0.4);
    background: var(--primary-glow);
}

.badge-click {
    color: var(--secondary);
    border-color: rgba(249, 115, 22, 0.4);
    background: var(--secondary-glow);
}

.badge-bot {
    color: #fca5a5;
    border-color: rgba(239, 68, 68, 0.4);
    background: rgba(239, 68, 68, 0.1);
}

.badge-human {
    color: var(--success);
    border-color: rgba(34, 197, 94, 0.4);
    background: rgba(34, 197, 94, 0.1);
}

.badge-success {
    color: var(--success);
    border-color: rgba(34, 197, 94, 0.4);
    background: rgba(34, 197, 94, 0.1);
}

.badge-winner {
    color: #04181d;
    background: var(--primary);
    border-color: var(--primary);
    box-shadow: 0 0 14px -3px var(--primary-glow);
}

/* 14. Toggle switch ------------------------------------------------------- */
.toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.65rem;
    cursor: pointer;
    user-select: none;
    font-size: 0.83rem;
    color: var(--muted);
}

.toggle input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle .track {
    position: relative;
    width: 42px;
    height: 22px;
    flex: 0 0 auto;
    background: var(--surface-2);
    border: 1px solid var(--border);
    transition: background var(--speed) var(--ease), border-color var(--speed) var(--ease);
}

.toggle .track::after {
    content: "";
    position: absolute;
    top: 2px;
    left: 2px;
    width: 16px;
    height: 16px;
    background: var(--dimmed);
    transition: transform var(--speed) var(--ease), background var(--speed) var(--ease);
}

.toggle input:checked + .track {
    background: var(--primary-glow);
    border-color: var(--primary);
}

.toggle input:checked + .track::after {
    transform: translateX(20px);
    background: var(--primary);
    box-shadow: 0 0 10px -1px var(--primary);
}

.toggle input:focus-visible + .track {
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.toggle .toggle-label-on {
    display: none;
}

.toggle input:checked ~ .toggle-label-on {
    display: inline;
}

.toggle input:checked ~ .toggle-label-off {
    display: none;
}

/* 15. Flash messages ------------------------------------------------------ */
.flash-stack {
    position: fixed;
    top: 74px;
    right: clamp(1rem, 3vw, 2.5rem);
    z-index: 60;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    width: min(360px, calc(100vw - 2rem));
}

.flash {
    position: relative;
    display: flex;
    align-items: flex-start;
    gap: 0.65rem;
    padding: 0.85rem 2.2rem 0.85rem 0.95rem;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-left-width: 3px;
    font-size: 0.85rem;
    color: var(--text);
    box-shadow: var(--shadow-pop);
    animation: slideInRight 0.35s var(--ease) both;
}

.flash.leaving {
    animation: slideOutRight 0.3s var(--ease) both;
}

.flash-success {
    border-left-color: var(--success);
}

.flash-error {
    border-left-color: var(--danger);
}

.flash-info {
    border-left-color: var(--primary);
}

.flash .flash-close {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    width: 22px;
    height: 22px;
    display: grid;
    place-items: center;
    background: transparent;
    border: 0;
    color: var(--dimmed);
    cursor: pointer;
    font-size: 1rem;
    line-height: 1;
    transition: color var(--speed) var(--ease);
}

.flash .flash-close:hover {
    color: var(--text);
}

/* inline flash (login) */
.flash.inline {
    position: static;
    box-shadow: none;
    animation: none;
    margin-bottom: 1rem;
    width: 100%;
}

/* 16. Modal / dialog ------------------------------------------------------ */
.modal-backdrop {
    position: fixed;
    inset: 0;
    z-index: 80;
    display: grid;
    place-items: center;
    padding: 1.5rem;
    background: rgba(9, 9, 11, 0.72);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    animation: fadeIn 0.2s var(--ease) both;
}

.modal {
    position: relative;
    width: min(560px, 100%);
    max-height: 86vh;
    overflow-y: auto;
    background: var(--surface-1);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-pop);
    animation: slideUp 0.28s var(--ease) both;
}

.modal-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-soft);
}

.modal-body {
    padding: 1.5rem;
}

.modal-foot {
    display: flex;
    justify-content: flex-end;
    gap: 0.6rem;
    padding: 1.1rem 1.5rem;
    border-top: 1px solid var(--border-soft);
}

.modal-close {
    width: 30px;
    height: 30px;
    display: grid;
    place-items: center;
    background: transparent;
    border: 1px solid transparent;
    color: var(--muted);
    cursor: pointer;
    font-size: 1.2rem;
    line-height: 1;
    transition: color var(--speed) var(--ease), border-color var(--speed) var(--ease);
}

.modal-close:hover {
    color: var(--text);
    border-color: var(--border);
}

/* 17. Charts -------------------------------------------------------------- */
.chart-container {
    position: relative;
    width: 100%;
    min-height: 280px;
}

.chart-container canvas {
    width: 100% !important;
}

.chart-container-sm {
    position: relative;
    width: 100%;
    min-height: 200px;
}

.chart-container-sm canvas {
    width: 100% !important;
}

.grid-2x2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
}

@media (max-width: 768px) {
    .grid-2x2 { grid-template-columns: 1fr; }
}

.card-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 0.75rem;
}

.chart-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 1.25rem;
    margin-bottom: 1rem;
}

.chart-legend .key {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--muted);
}

.chart-legend .swatch {
    width: 12px;
    height: 12px;
}

.chart-legend .swatch.cyan {
    background: var(--primary);
    box-shadow: 0 0 8px -1px var(--primary);
}

.chart-legend .swatch.orange {
    background: var(--secondary);
    box-shadow: 0 0 8px -1px var(--secondary);
}

/* 18. A/B comparison ------------------------------------------------------ */
.compare-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
}

.variant-card {
    position: relative;
    padding: 1.5rem;
    background: var(--surface-1);
    border: 1px solid var(--border-soft);
    border-top-width: 3px;
}

.variant-card.variant-a {
    border-top-color: var(--primary);
}

.variant-card.variant-b {
    border-top-color: var(--secondary);
}

.variant-card .variant-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.25rem;
}

.variant-card .variant-name {
    font-family: var(--font-mono);
    font-size: 1.1rem;
    font-weight: 600;
}

.variant-a .variant-name {
    color: var(--primary);
}

.variant-b .variant-name {
    color: var(--secondary);
}

.variant-metrics {
    display: grid;
    gap: 0.85rem;
}

.metric-row {
    display: grid;
    gap: 0.3rem;
}

.metric-row .metric-top {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
}

.metric-row .metric-label {
    font-size: 0.74rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--dimmed);
}

.metric-row .metric-val {
    font-family: var(--font-mono);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text);
}

.metric-bar {
    height: 4px;
    background: var(--surface-2);
    overflow: hidden;
}

.metric-bar > i {
    display: block;
    height: 100%;
    width: 0;
    transition: width 0.6s var(--ease);
}

.variant-a .metric-bar > i {
    background: var(--primary);
}

.variant-b .metric-bar > i {
    background: var(--secondary);
}

/* 19. Pagination ---------------------------------------------------------- */
.pagination {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-top: 1.25rem;
    flex-wrap: wrap;
}

.pagination .page-info {
    font-family: var(--font-mono);
    font-size: 0.76rem;
    color: var(--dimmed);
}

.pagination .pages {
    display: flex;
    gap: 0.3rem;
}

.page-btn {
    min-width: 34px;
    height: 34px;
    padding: 0 0.5rem;
    display: grid;
    place-items: center;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--muted);
    background: var(--surface-1);
    border: 1px solid var(--border-soft);
    cursor: pointer;
    transition: border-color var(--speed) var(--ease), color var(--speed) var(--ease),
        background var(--speed) var(--ease);
}

.page-btn:hover:not([disabled]) {
    border-color: var(--primary);
    color: var(--text);
}

.page-btn.active {
    color: #04181d;
    background: var(--primary);
    border-color: var(--primary);
}

.page-btn[disabled] {
    opacity: 0.4;
    cursor: not-allowed;
}

/* 20. Copy button / snippet ----------------------------------------------- */
.snippet {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--muted);
    background: var(--base);
    border: 1px solid var(--border-soft);
    padding: 0.55rem 0.7rem;
    overflow-x: auto;
    white-space: nowrap;
    max-width: 100%;
}

.snippet-block {
    display: flex;
    align-items: stretch;
    gap: 0;
}

.snippet-block .snippet {
    flex: 1;
    border-right: 0;
}

.snippet-block .btn {
    flex: 0 0 auto;
    border-left: 0;
}

.copy-cell {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    min-width: 0;
}

.copy-cell .snippet {
    max-width: 320px;
}

[data-copy].copied,
.btn.copied {
    --btn-fg: var(--success);
    color: var(--success);
    border-color: var(--success);
}

/* 21. Loading states ------------------------------------------------------ */
.skeleton {
    background: linear-gradient(90deg, var(--surface-2) 25%, var(--border) 37%, var(--surface-2) 63%);
    background-size: 400% 100%;
    animation: shimmer 1.4s var(--ease) infinite;
    color: transparent !important;
    min-height: 1em;
}

.spinner {
    width: 18px;
    height: 18px;
    border: 2px solid var(--border);
    border-top-color: var(--primary);
    animation: spin 0.7s linear infinite;
}

.loading-row {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    color: var(--dimmed);
    font-size: 0.82rem;
    padding: 1rem 0;
}

/* 22. Login page ---------------------------------------------------------- */
.auth-screen {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 1.5rem;
    overflow: hidden;
}

.auth-aurora {
    position: fixed;
    inset: 0;
    z-index: -1;
    background:
        radial-gradient(40% 50% at 20% 25%, var(--primary-glow), transparent 70%),
        radial-gradient(35% 45% at 82% 78%, var(--secondary-glow), transparent 70%);
    animation: auroraShift 16s ease-in-out infinite alternate;
}

.auth-card {
    width: min(400px, 100%);
    padding: 2.5rem;
    background: rgba(24, 24, 27, 0.78);
    border: 1px solid var(--border);
    backdrop-filter: blur(18px) saturate(140%);
    -webkit-backdrop-filter: blur(18px) saturate(140%);
    box-shadow: var(--shadow-pop);
    animation: slideUp 0.45s var(--ease) both;
}

.auth-brand {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    margin-bottom: 2rem;
}

.auth-card h1 {
    font-size: 1.5rem;
    margin-bottom: 0.3rem;
}

.auth-card .auth-sub {
    color: var(--muted);
    font-size: 0.88rem;
    margin-bottom: 1.75rem;
}

.auth-card .form {
    gap: 1.1rem;
}

.auth-card .btn-primary {
    margin-top: 0.4rem;
    width: 100%;
    padding: 0.75rem;
}

.auth-foot {
    margin-top: 1.75rem;
    text-align: center;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--dimmed);
}

/* 23. Empty states -------------------------------------------------------- */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 0.75rem;
    padding: 4rem 1.5rem;
    border: 1px dashed var(--border);
    background: rgba(255, 255, 255, 0.008);
}

.empty-state .empty-icon {
    width: 48px;
    height: 48px;
    display: grid;
    place-items: center;
    border: 1px solid var(--border);
    color: var(--dimmed);
    margin-bottom: 0.25rem;
}

.empty-state .empty-icon svg {
    width: 24px;
    height: 24px;
    stroke: currentColor;
}

.empty-state h3 {
    color: var(--text);
}

.empty-state p {
    color: var(--muted);
    max-width: 42ch;
}

/* 24. Animations ---------------------------------------------------------- */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(14px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(28px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideOutRight {
    from {
        opacity: 1;
        transform: translateX(0);
    }
    to {
        opacity: 0;
        transform: translateX(28px);
    }
}

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

@keyframes shimmer {
    0% {
        background-position: 100% 0;
    }
    100% {
        background-position: -100% 0;
    }
}

@keyframes pulse {
    0%,
    100% {
        opacity: 1;
    }
    50% {
        opacity: 0.35;
    }
}

@keyframes auroraShift {
    from {
        transform: translate3d(-4%, -2%, 0) scale(1);
    }
    to {
        transform: translate3d(4%, 3%, 0) scale(1.1);
    }
}

/* Staggered entrance for grids and panels */
.stagger > * {
    animation: fadeUp 0.5s var(--ease) both;
}

.stagger > *:nth-child(1) {
    animation-delay: 0.04s;
}
.stagger > *:nth-child(2) {
    animation-delay: 0.09s;
}
.stagger > *:nth-child(3) {
    animation-delay: 0.14s;
}
.stagger > *:nth-child(4) {
    animation-delay: 0.19s;
}
.stagger > *:nth-child(5) {
    animation-delay: 0.24s;
}
.stagger > *:nth-child(6) {
    animation-delay: 0.29s;
}
.stagger > *:nth-child(7) {
    animation-delay: 0.34s;
}
.stagger > *:nth-child(8) {
    animation-delay: 0.39s;
}
.stagger > *:nth-child(n + 9) {
    animation-delay: 0.44s;
}

.panel {
    animation: fadeUp 0.5s var(--ease) both;
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
    }
}

/* 25. Scrollbars ---------------------------------------------------------- */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
}

::-webkit-scrollbar {
    width: 9px;
    height: 9px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border: 2px solid var(--base);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--dimmed);
}

/* 26. Responsive ---------------------------------------------------------- */
@media (max-width: 920px) {
    .split,
    .compare-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .app-shell {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        bottom: 0;
        width: min(280px, 82vw);
        transform: translateX(-100%);
        transition: transform var(--speed) var(--ease);
        box-shadow: var(--shadow-pop);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .sidebar-backdrop {
        position: fixed;
        inset: 0;
        z-index: 25;
        background: rgba(9, 9, 11, 0.6);
        backdrop-filter: blur(2px);
        -webkit-backdrop-filter: blur(2px);
    }

    .sidebar-toggle {
        display: grid;
        place-items: center;
        width: 38px;
        height: 38px;
        background: var(--surface-2);
        border: 1px solid var(--border);
        color: var(--text);
        cursor: pointer;
    }

    .sidebar-toggle svg {
        width: 18px;
        height: 18px;
        stroke: currentColor;
    }

    .page-header {
        align-items: flex-start;
    }

    .data-table {
        font-size: 0.8rem;
    }

    .copy-cell .snippet {
        max-width: 160px;
    }
}

@media (min-width: 769px) {
    .sidebar-backdrop {
        display: none;
    }
}

/* 27. Print --------------------------------------------------------------- */
@media print {
    body {
        background: #fff;
        color: #000;
    }

    body::before,
    body::after,
    .sidebar,
    .topbar,
    .page-actions,
    .flash-stack,
    .sidebar-toggle,
    .app-footer {
        display: none !important;
    }

    .app-shell {
        grid-template-columns: 1fr;
    }

    .card,
    .panel,
    .variant-card,
    .stat-card {
        border: 1px solid #ccc;
        box-shadow: none;
        break-inside: avoid;
    }

    .stat-value {
        color: #000;
    }
}

/* App footer -------------------------------------------------------------- */
.app-footer {
    margin-top: auto;
    padding: 1.25rem clamp(1rem, 3vw, 2.5rem);
    border-top: 1px solid var(--border-soft);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.08em;
    color: var(--dimmed);
}

.app-footer a {
    color: var(--dimmed);
}

.app-footer a:hover {
    color: var(--primary);
}

/* Settings ---------------------------------------------------------------- */
.setting-row {
    display: grid;
    grid-template-columns: minmax(220px, 1fr) minmax(280px, 1.4fr) auto;
    align-items: center;
    gap: 1.25rem;
    padding: 1.1rem 0;
    border-bottom: 1px solid var(--border-soft);
}

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

.setting-row.multiline {
    grid-template-columns: 1fr;
    align-items: stretch;
    gap: 0.75rem;
}

.setting-key {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    min-width: 0;
}

.setting-key code {
    font-size: 0.84rem;
    color: var(--text);
    word-break: break-word;
}

.setting-key .setting-desc {
    font-size: 0.78rem;
    color: var(--dimmed);
}

.setting-control {
    min-width: 0;
}

.setting-save {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    justify-content: flex-end;
}

.setting-save .save-status {
    min-width: 3.5rem;
}

@media (max-width: 700px) {
    .setting-row {
        grid-template-columns: 1fr;
        align-items: stretch;
        gap: 0.65rem;
    }

    .setting-save {
        justify-content: flex-start;
    }
}

/* Date-range control cluster --------------------------------------------- */
.controls-bar {
    display: flex;
    align-items: flex-end;
    gap: 1rem;
    flex-wrap: wrap;
    padding: 1.1rem 1.25rem;
    background: var(--surface-1);
    border: 1px solid var(--border-soft);
    margin-bottom: 1.5rem;
}

.controls-bar .field {
    gap: 0.3rem;
}

.controls-bar .field > span {
    font-size: 0.68rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--dimmed);
}

.controls-bar .spacer {
    margin-left: auto;
}