:root {
  color-scheme: light;
  --bg: #f5f5f7;
  --surface: rgba(255, 255, 255, 0.82);
  --surface-strong: #ffffff;
  --ink: #1d1d1f;
  --muted: #6e6e73;
  --subtle: #86868b;
  --line: rgba(0, 0, 0, 0.1);
  --line-strong: rgba(0, 0, 0, 0.16);
  --blue: #0071e3;
  --blue-dark: #005bb5;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.11);
  --radius: 8px;
}

/* Premium dark redesign */
:root {
  color-scheme: dark;
  --bg: oklch(0.145 0.014 250);
  --bg-deep: oklch(0.105 0.012 250);
  --surface: oklch(0.205 0.018 250 / 0.86);
  --surface-strong: oklch(0.245 0.02 250);
  --surface-soft: oklch(0.18 0.018 250 / 0.72);
  --ink: oklch(0.94 0.012 260);
  --muted: oklch(0.72 0.026 255);
  --subtle: oklch(0.58 0.025 255);
  --line: oklch(0.92 0.018 255 / 0.13);
  --line-strong: oklch(0.92 0.02 255 / 0.22);
  --blue: oklch(0.68 0.17 248);
  --blue-dark: oklch(0.58 0.16 248);
  --amber: oklch(0.78 0.13 74);
  --copper: oklch(0.64 0.13 42);
  --shadow: 0 28px 90px oklch(0.02 0.008 260 / 0.46);
  --radius: 12px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

body {
  background:
    linear-gradient(180deg, oklch(0.18 0.016 250) 0%, var(--bg) 42%, var(--bg-deep) 100%),
    repeating-linear-gradient(90deg, oklch(1 0 0 / 0.026) 0 1px, transparent 1px 92px),
    repeating-linear-gradient(0deg, oklch(1 0 0 / 0.018) 0 1px, transparent 1px 92px);
  color: var(--ink);
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    linear-gradient(120deg, transparent 0 22%, oklch(0.75 0.13 75 / 0.08) 44%, transparent 66%),
    linear-gradient(300deg, transparent 0 28%, oklch(0.68 0.17 248 / 0.08) 54%, transparent 74%);
  content: "";
}

.login-screen {
  background:
    linear-gradient(180deg, oklch(0.18 0.017 250) 0%, oklch(0.125 0.014 250) 100%),
    repeating-linear-gradient(90deg, oklch(1 0 0 / 0.03) 0 1px, transparent 1px 88px);
}

.login-card {
  border-color: var(--line-strong);
  border-radius: 22px;
  background:
    linear-gradient(180deg, oklch(0.25 0.021 250 / 0.94), oklch(0.17 0.018 250 / 0.9));
  box-shadow: 0 40px 110px oklch(0.02 0.01 260 / 0.58), inset 0 1px 0 oklch(1 0 0 / 0.08);
}

.login-card h1 {
  color: var(--ink);
}

.login-copy,
.login-hint {
  color: var(--muted);
}

.login-fields label {
  color: var(--muted);
}

.login-fields input,
.field-grid input {
  border-color: var(--line);
  background: oklch(0.13 0.012 250 / 0.9);
  color: var(--ink);
  box-shadow: inset 0 1px 0 oklch(1 0 0 / 0.04);
}

.login-fields input::placeholder {
  color: oklch(0.58 0.024 255);
}

.login-error {
  color: oklch(0.72 0.18 28);
}

.app-shell {
  padding: 0 24px 30px;
}

.topbar {
  max-width: 1520px;
  border-bottom-color: var(--line);
  background: oklch(0.13 0.014 250 / 0.78);
  box-shadow: 0 16px 44px oklch(0.04 0.008 260 / 0.2);
}

.brand {
  color: var(--ink);
}

.brand-mark {
  background:
    radial-gradient(circle at 26% 27%, oklch(0.72 0.18 30) 0 16%, transparent 17%),
    radial-gradient(circle at 74% 27%, var(--amber) 0 16%, transparent 17%),
    radial-gradient(circle at 26% 73%, oklch(0.72 0.12 165) 0 16%, transparent 17%),
    radial-gradient(circle at 74% 73%, var(--blue) 0 16%, transparent 17%),
    oklch(0.18 0.014 250);
  box-shadow: inset 0 0 0 1px var(--line-strong), 0 0 24px oklch(0.68 0.17 248 / 0.16);
}

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

.nav-links a,
.nav-links button {
  min-height: 34px;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 7px 11px;
  transition: background 180ms var(--ease), border-color 180ms var(--ease), color 180ms var(--ease);
}

.nav-links a:hover,
.nav-links button:hover {
  border-color: var(--line);
  background: oklch(1 0 0 / 0.055);
  color: var(--ink);
}

.intro {
  max-width: 1040px;
  margin: 56px auto 36px;
}

.eyebrow {
  color: var(--amber);
}

h1 {
  color: var(--ink);
  font-weight: 780;
  text-wrap: balance;
}

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

.workspace {
  max-width: 1520px;
  gap: 20px;
}

.control-panel,
.stage,
.palette-panel {
  border-color: var(--line);
  background:
    linear-gradient(180deg, oklch(0.23 0.018 250 / 0.9), oklch(0.16 0.016 250 / 0.9));
  box-shadow: var(--shadow), inset 0 1px 0 oklch(1 0 0 / 0.06);
}

.panel-section {
  border-bottom-color: var(--line);
}

.upload-box {
  border-color: oklch(1 0 0 / 0.18);
  background:
    linear-gradient(180deg, oklch(0.19 0.018 250 / 0.96), oklch(0.14 0.014 250 / 0.96));
  color: var(--ink);
}

.upload-box:hover,
.upload-box.is-dragover {
  border-color: oklch(0.77 0.13 74 / 0.72);
  background:
    linear-gradient(180deg, oklch(0.235 0.022 250), oklch(0.17 0.018 250));
  box-shadow: 0 0 0 4px oklch(0.77 0.13 74 / 0.11), 0 18px 54px oklch(0.02 0.01 260 / 0.28);
}

.upload-visual {
  background: linear-gradient(180deg, oklch(0.28 0.022 250), oklch(0.18 0.018 250));
  box-shadow: inset 0 0 0 1px var(--line-strong), 0 12px 30px oklch(0.02 0.01 260 / 0.34);
}

.upload-visual span::before,
.upload-visual span::after {
  background: var(--amber);
}

.upload-title,
.demo-card strong,
.section-heading span,
.stage-toolbar strong,
.panel-title strong {
  color: var(--ink);
}

.upload-meta,
.demo-card small,
.stage-toolbar p,
.source-note {
  color: var(--muted);
}

.demo-card,
.swatch-row {
  border-color: var(--line);
  background: oklch(1 0 0 / 0.045);
  color: var(--ink);
  transition: transform 180ms var(--ease), border-color 180ms var(--ease), background 180ms var(--ease);
}

.demo-card:hover {
  transform: translateY(-1px);
  border-color: oklch(0.77 0.13 74 / 0.45);
  background: oklch(1 0 0 / 0.07);
}

.demo-card img {
  filter: saturate(0.92) contrast(1.08);
}

.section-heading,
.range-field,
.field-grid label,
.cutout-heading,
.panel-title p {
  color: var(--muted);
}

.segmented {
  background: oklch(0.12 0.012 250 / 0.9);
  border: 1px solid var(--line);
  box-shadow: inset 0 1px 0 oklch(1 0 0 / 0.04);
}

.segmented label span {
  color: var(--muted);
}

.segmented input:checked + span {
  background: linear-gradient(180deg, oklch(0.33 0.04 248), oklch(0.24 0.036 248));
  color: var(--ink);
  box-shadow: 0 10px 28px oklch(0.04 0.012 260 / 0.34), inset 0 1px 0 oklch(1 0 0 / 0.12);
}

.field-grid input:focus,
.login-fields input:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 4px oklch(0.68 0.17 248 / 0.14);
}

.switch {
  color: var(--ink);
}

.switch input {
  background: oklch(0.31 0.018 250);
  box-shadow: inset 0 0 0 1px var(--line);
}

.switch input::after {
  background: oklch(0.88 0.012 250);
}

.switch input:checked {
  background: linear-gradient(90deg, var(--copper), var(--amber));
}

.range-field strong {
  color: var(--ink);
}

.range-field input {
  accent-color: var(--amber);
}

.cutout-preview {
  border-color: var(--line);
  background: oklch(0.96 0.006 250);
}

button,
.actions button,
#downloadCutout {
  border-color: var(--line);
  background: oklch(1 0 0 / 0.055);
  color: var(--ink);
  transition: transform 160ms var(--ease), border-color 160ms var(--ease), background 160ms var(--ease), box-shadow 160ms var(--ease);
}

button:hover:not(:disabled),
.actions button:hover:not(:disabled),
#downloadCutout:hover:not(:disabled) {
  transform: translateY(-1px);
  border-color: oklch(0.77 0.13 74 / 0.46);
  background: oklch(1 0 0 / 0.085);
}

button.primary,
.login-submit {
  border-color: oklch(0.82 0.12 74 / 0.5);
  background: linear-gradient(180deg, oklch(0.78 0.13 74), oklch(0.63 0.13 48));
  color: oklch(0.14 0.014 250);
  box-shadow: 0 16px 46px oklch(0.62 0.12 55 / 0.25), inset 0 1px 0 oklch(1 0 0 / 0.3);
}

button.primary:hover:not(:disabled),
.login-submit:hover:not(:disabled) {
  background: linear-gradient(180deg, oklch(0.82 0.13 74), oklch(0.66 0.13 48));
}

.stage-toolbar {
  border-bottom-color: var(--line);
  background: oklch(0.16 0.016 250 / 0.82);
}

.stats span {
  background: oklch(1 0 0 / 0.065);
  color: var(--muted);
}

.canvas-wrap {
  background:
    linear-gradient(45deg, oklch(1 0 0 / 0.03) 25%, transparent 25%),
    linear-gradient(-45deg, oklch(1 0 0 / 0.03) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, oklch(1 0 0 / 0.03) 75%),
    linear-gradient(-45deg, transparent 75%, oklch(1 0 0 / 0.03) 75%),
    oklch(0.105 0.012 250);
  background-position: 0 0, 0 11px, 11px -11px, -11px 0, 0 0;
  background-size: 22px 22px;
}

#patternCanvas {
  box-shadow: 0 24px 70px oklch(0.02 0.01 260 / 0.62), 0 0 0 1px var(--line);
}

.empty-state strong {
  color: var(--ink);
}

.empty-state span,
.swatch-name span,
.swatch-count {
  color: var(--muted);
}

.swatch {
  border-color: oklch(0 0 0 / 0.34);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 1ms !important;
  }
}

/* Final browser-safe dark override. This must remain the last theme layer. */
:root {
  color-scheme: dark;
  --bg: #0b0d12;
  --bg-deep: #05070b;
  --surface: rgba(24, 27, 36, 0.9);
  --surface-strong: #202632;
  --surface-soft: rgba(17, 20, 29, 0.78);
  --ink: #f4f6fb;
  --muted: #a7adba;
  --subtle: #7d8491;
  --line: rgba(255, 255, 255, 0.12);
  --line-strong: rgba(255, 255, 255, 0.2);
  --blue: #65a7ff;
  --blue-dark: #3d7fe6;
  --amber: #f4c76b;
  --copper: #c77b4a;
  --shadow: 0 28px 90px rgba(0, 0, 0, 0.52);
  --radius: 12px;
}

html,
body {
  background: #0b0d12;
}

body,
.login-screen {
  background:
    linear-gradient(180deg, #151922 0%, #0b0d12 42%, #05070b 100%),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.035) 0 1px, transparent 1px 92px),
    repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.025) 0 1px, transparent 1px 92px);
  color: var(--ink);
}

body::before {
  background:
    linear-gradient(120deg, transparent 0 24%, rgba(244, 199, 107, 0.08) 44%, transparent 66%),
    linear-gradient(300deg, transparent 0 30%, rgba(101, 167, 255, 0.08) 55%, transparent 76%);
}

.login-card,
.control-panel,
.stage,
.palette-panel {
  border-color: var(--line);
  background: linear-gradient(180deg, rgba(32, 38, 50, 0.94), rgba(17, 20, 29, 0.92));
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.07);
}

.topbar,
.stage-toolbar {
  border-bottom-color: var(--line);
  background: rgba(12, 15, 22, 0.82);
  box-shadow: 0 16px 44px rgba(0, 0, 0, 0.22);
}

.brand,
h1,
h2,
h3,
.login-card h1,
.upload-title,
.demo-card strong,
.section-heading span,
.stage-toolbar strong,
.panel-title strong,
.empty-state strong,
.switch,
.swatch-name strong,
button {
  color: var(--ink);
}

.login-copy,
.login-hint,
.login-fields label,
.upload-meta,
.demo-card small,
.stage-toolbar p,
.source-note,
.intro-copy,
.field-grid label,
.range-field,
.cutout-heading,
.panel-title p,
.empty-state span,
.swatch-name span,
.nav-links {
  color: var(--muted);
}

.eyebrow,
.swatch-count {
  color: var(--amber);
}

.brand-mark {
  background:
    radial-gradient(circle at 26% 27%, #e26f58 0 16%, transparent 17%),
    radial-gradient(circle at 74% 27%, #f4c76b 0 16%, transparent 17%),
    radial-gradient(circle at 26% 73%, #65c5a9 0 16%, transparent 17%),
    radial-gradient(circle at 74% 73%, #65a7ff 0 16%, transparent 17%),
    #202632;
  box-shadow: inset 0 0 0 1px var(--line-strong), 0 0 24px rgba(101, 167, 255, 0.16);
}

.upload-box,
.demo-card,
.swatch-row,
.segmented,
.field-grid input,
.login-fields input {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.045);
  color: var(--ink);
}

.upload-box {
  background: linear-gradient(180deg, rgba(32, 38, 50, 0.96), rgba(17, 20, 29, 0.96));
}

.upload-box:hover,
.upload-box.is-dragover,
.demo-card:hover,
button:hover:not(:disabled),
.actions button:hover:not(:disabled),
#downloadCutout:hover:not(:disabled) {
  border-color: rgba(244, 199, 107, 0.5);
  background: rgba(255, 255, 255, 0.08);
}

.upload-visual {
  background: linear-gradient(180deg, #303746, #1d2330);
  box-shadow: inset 0 0 0 1px var(--line-strong), 0 12px 30px rgba(0, 0, 0, 0.34);
}

.upload-visual span::before,
.upload-visual span::after {
  background: var(--amber);
}

.segmented {
  background: rgba(7, 9, 14, 0.9);
}

.segmented label span {
  color: var(--muted);
}

.segmented input:checked + span {
  background: linear-gradient(180deg, #34445f, #26334b);
  color: var(--ink);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.34), inset 0 1px 0 rgba(255, 255, 255, 0.12);
}

.login-fields input,
.field-grid input {
  background: rgba(10, 13, 20, 0.9);
}

.field-grid input:focus,
.login-fields input:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 4px rgba(101, 167, 255, 0.14);
}

.switch input {
  background: #3a414e;
  box-shadow: inset 0 0 0 1px var(--line);
}

.switch input::after {
  background: #e8ebf2;
}

.switch input:checked {
  background: linear-gradient(90deg, var(--copper), var(--amber));
}

button,
.actions button,
#downloadCutout {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.055);
  color: var(--ink);
}

button.primary,
.login-submit {
  border-color: rgba(244, 199, 107, 0.5);
  background: linear-gradient(180deg, #f4c76b, #c77b4a);
  color: #12151d;
  box-shadow: 0 16px 46px rgba(199, 123, 74, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.cutout-preview {
  background: #f7f8fb;
}

.canvas-wrap {
  background:
    linear-gradient(45deg, rgba(255, 255, 255, 0.03) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(255, 255, 255, 0.03) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(255, 255, 255, 0.03) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(255, 255, 255, 0.03) 75%),
    #080a0f;
  background-position: 0 0, 0 11px, 11px -11px, -11px 0, 0 0;
  background-size: 22px 22px;
}

#patternCanvas {
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.62), 0 0 0 1px var(--line);
}

/* Browser-safe premium dark theme. Keep this final block last. */
:root {
  color-scheme: dark;
  --bg: #0b0d12;
  --bg-deep: #05070b;
  --surface: rgba(24, 27, 36, 0.9);
  --surface-strong: #202632;
  --surface-soft: rgba(17, 20, 29, 0.78);
  --ink: #f4f6fb;
  --muted: #a7adba;
  --subtle: #7d8491;
  --line: rgba(255, 255, 255, 0.12);
  --line-strong: rgba(255, 255, 255, 0.2);
  --blue: #65a7ff;
  --blue-dark: #3d7fe6;
  --amber: #f4c76b;
  --copper: #c77b4a;
  --shadow: 0 28px 90px rgba(0, 0, 0, 0.52);
  --radius: 12px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

html,
body {
  background: #0b0d12;
}

body {
  background:
    linear-gradient(180deg, #151922 0%, #0b0d12 42%, #05070b 100%),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.035) 0 1px, transparent 1px 92px),
    repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.025) 0 1px, transparent 1px 92px);
  color: var(--ink);
}

body::before {
  background:
    linear-gradient(120deg, transparent 0 24%, rgba(244, 199, 107, 0.08) 44%, transparent 66%),
    linear-gradient(300deg, transparent 0 30%, rgba(101, 167, 255, 0.08) 55%, transparent 76%);
}

.login-screen {
  background:
    linear-gradient(180deg, #151922 0%, #090b10 100%),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.04) 0 1px, transparent 1px 88px);
}

.login-card,
.control-panel,
.stage,
.palette-panel {
  border-color: var(--line);
  background: linear-gradient(180deg, rgba(32, 38, 50, 0.94), rgba(17, 20, 29, 0.92));
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.07);
}

.login-card {
  border-radius: 22px;
}

.topbar {
  border-bottom-color: var(--line);
  background: rgba(12, 15, 22, 0.78);
  box-shadow: 0 16px 44px rgba(0, 0, 0, 0.22);
}

.brand,
h1,
h2,
h3,
.section-heading span,
.panel-title h2,
.range-field strong,
.upload-title,
.demo-card strong,
.swatch-name strong {
  color: var(--ink);
}

.login-copy,
.login-hint,
.login-fields label,
.demo-card small,
.stage-toolbar p,
.source-note,
.intro-copy,
.field-grid label,
.range-field,
.cutout-heading,
.panel-title p,
.empty-state span,
.swatch-name span,
.swatch-count,
.nav-links {
  color: var(--muted);
}

.eyebrow {
  color: var(--amber);
}

.brand-mark {
  background:
    radial-gradient(circle at 26% 27%, #e26f58 0 16%, transparent 17%),
    radial-gradient(circle at 74% 27%, #f4c76b 0 16%, transparent 17%),
    radial-gradient(circle at 26% 73%, #65c5a9 0 16%, transparent 17%),
    radial-gradient(circle at 74% 73%, #65a7ff 0 16%, transparent 17%),
    #202632;
  box-shadow: inset 0 0 0 1px var(--line-strong), 0 0 24px rgba(101, 167, 255, 0.16);
}

.upload-box,
.demo-card,
.swatch-row,
.cutout-preview,
.segmented,
.field-grid input,
.login-fields input {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.045);
  color: var(--ink);
}

.upload-box {
  background: linear-gradient(180deg, rgba(32, 38, 50, 0.96), rgba(17, 20, 29, 0.96));
}

.upload-box:hover,
.upload-box.is-dragover,
.demo-card:hover {
  border-color: rgba(244, 199, 107, 0.62);
  background: rgba(255, 255, 255, 0.075);
  box-shadow: 0 0 0 4px rgba(244, 199, 107, 0.1), 0 18px 54px rgba(0, 0, 0, 0.3);
}

.upload-visual {
  background: linear-gradient(180deg, #303746, #1d2330);
  box-shadow: inset 0 0 0 1px var(--line-strong), 0 12px 30px rgba(0, 0, 0, 0.34);
}

.upload-visual span::before,
.upload-visual span::after {
  background: var(--amber);
}

.segmented {
  background: rgba(7, 9, 14, 0.9);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.segmented label span {
  color: var(--muted);
}

.segmented input:checked + span {
  background: linear-gradient(180deg, #34445f, #26334b);
  color: var(--ink);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.34), inset 0 1px 0 rgba(255, 255, 255, 0.12);
}

.login-fields input,
.field-grid input {
  background: rgba(10, 13, 20, 0.9);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.login-fields input::placeholder {
  color: #7d8491;
}

.field-grid input:focus,
.login-fields input:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 4px rgba(101, 167, 255, 0.14);
}

.login-error {
  color: #f08a73;
}

.switch input {
  background: #3a414e;
  box-shadow: inset 0 0 0 1px var(--line);
}

.switch input::after {
  background: #e8ebf2;
}

.switch input:checked {
  background: linear-gradient(90deg, var(--copper), var(--amber));
}

.range-field input {
  accent-color: var(--amber);
}

.cutout-preview {
  background: #f7f8fb;
}

button,
.actions button,
#downloadCutout {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.055);
  color: var(--ink);
  transition: transform 160ms var(--ease), border-color 160ms var(--ease), background 160ms var(--ease), box-shadow 160ms var(--ease);
}

button:hover:not(:disabled),
.actions button:hover:not(:disabled),
#downloadCutout:hover:not(:disabled) {
  transform: translateY(-1px);
  border-color: rgba(244, 199, 107, 0.46);
  background: rgba(255, 255, 255, 0.085);
}

button.primary,
.login-submit {
  border-color: rgba(244, 199, 107, 0.5);
  background: linear-gradient(180deg, #f4c76b, #c77b4a);
  color: #12151d;
  box-shadow: 0 16px 46px rgba(199, 123, 74, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

button.primary:hover:not(:disabled),
.login-submit:hover:not(:disabled) {
  background: linear-gradient(180deg, #ffd889, #d38b56);
}

.stage-toolbar {
  border-bottom-color: var(--line);
  background: rgba(19, 23, 32, 0.86);
}

.stats span {
  background: rgba(255, 255, 255, 0.065);
  color: var(--muted);
}

.canvas-wrap {
  background:
    linear-gradient(45deg, rgba(255, 255, 255, 0.03) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(255, 255, 255, 0.03) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(255, 255, 255, 0.03) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(255, 255, 255, 0.03) 75%),
    #080a0f;
  background-position: 0 0, 0 11px, 11px -11px, -11px 0, 0 0;
  background-size: 22px 22px;
}

#patternCanvas {
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.62), 0 0 0 1px var(--line);
}

.swatch {
  border-color: rgba(0, 0, 0, 0.34);
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
.demo-card:focus-visible,
.upload-box:focus-within {
  outline: 3px solid rgba(101, 167, 255, 0.45);
  outline-offset: 2px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 50% -10%, rgba(255, 255, 255, 0.9), transparent 34rem),
    linear-gradient(180deg, #fbfbfd 0%, var(--bg) 48%, #ececf0 100%);
  color: var(--ink);
  font-family:
    -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Segoe UI",
    "Microsoft YaHei", sans-serif;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input {
  font: inherit;
}

body.auth-locked {
  overflow: hidden;
}

body.auth-locked .app-shell {
  display: none;
}

body:not(.auth-locked) .login-screen {
  display: none;
}

.login-screen {
  display: grid;
  min-height: 100vh;
  place-items: center;
  padding: 28px;
  background:
    radial-gradient(circle at 50% -18%, rgba(255, 255, 255, 0.96), transparent 38rem),
    linear-gradient(180deg, #fbfbfd 0%, #f5f5f7 58%, #ececf0 100%);
}

.login-card {
  display: grid;
  gap: 24px;
  width: min(100%, 480px);
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.86);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.12);
  backdrop-filter: blur(28px);
}

.login-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  font-weight: 800;
}

.login-card h1 {
  max-width: none;
  font-size: clamp(34px, 7vw, 54px);
}

.login-copy {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.5;
}

.login-fields {
  display: grid;
  gap: 14px;
}

.login-fields label {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.login-fields input {
  height: 48px;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  color: var(--ink);
  padding: 0 13px;
  outline: none;
}

.login-fields input:focus {
  border-color: rgba(0, 113, 227, 0.68);
  box-shadow: 0 0 0 4px rgba(0, 113, 227, 0.12);
}

.login-error {
  min-height: 20px;
  margin: -4px 0 0;
  color: #b42318;
  font-size: 13px;
  font-weight: 700;
}

.login-submit {
  height: 48px;
  cursor: pointer;
}

.login-hint {
  margin: -6px 0 0;
  color: var(--subtle);
  font-size: 12px;
  text-align: center;
}

.app-shell {
  min-height: 100vh;
  padding: 0 22px 28px;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1440px;
  height: 54px;
  margin: 0 auto;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  background: rgba(245, 245, 247, 0.72);
  backdrop-filter: blur(22px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 14px;
  font-weight: 700;
}

.brand-mark {
  width: 22px;
  height: 22px;
  border-radius: 6px;
  background:
    radial-gradient(circle at 26% 27%, #ff5f57 0 16%, transparent 17%),
    radial-gradient(circle at 74% 27%, #ffbd2e 0 16%, transparent 17%),
    radial-gradient(circle at 26% 73%, #28c840 0 16%, transparent 17%),
    radial-gradient(circle at 74% 73%, #0071e3 0 16%, transparent 17%),
    #fff;
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.12);
}

.nav-links {
  align-items: center;
  display: flex;
  gap: 22px;
  color: var(--muted);
  font-size: 12px;
}

.nav-links button {
  padding: 6px 10px;
  border-color: rgba(0, 0, 0, 0.08);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.64);
  color: var(--muted);
  cursor: pointer;
  font-size: 12px;
}

.nav-links button:hover {
  color: var(--ink);
  background: #fff;
}

.intro {
  max-width: 980px;
  margin: 46px auto 34px;
  text-align: center;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--blue);
  font-size: 17px;
  font-weight: 700;
}

h1 {
  margin: 0 auto;
  max-width: 850px;
  font-size: clamp(42px, 7vw, 78px);
  line-height: 1.04;
  letter-spacing: 0;
}

.intro-copy {
  max-width: 650px;
  margin: 18px auto 0;
  color: var(--muted);
  font-size: 21px;
  line-height: 1.45;
}

.workspace {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr) 300px;
  gap: 18px;
  max-width: 1440px;
  margin: 0 auto;
  min-height: 720px;
}

.control-panel,
.stage,
.palette-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(28px);
}

.control-panel,
.palette-panel {
  align-self: start;
  max-height: calc(100vh - 78px);
  overflow: auto;
  padding: 16px;
}

.panel-section {
  padding: 0 0 16px;
  margin: 0 0 16px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.07);
}

.panel-section:last-of-type {
  border-bottom: 0;
}

.upload-box {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 176px;
  padding: 22px;
  border: 1px dashed rgba(0, 0, 0, 0.22);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.68);
  text-align: center;
  cursor: pointer;
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}

.upload-box:hover {
  transform: translateY(-1px);
  border-color: rgba(0, 113, 227, 0.45);
  background: #fff;
}

.upload-box.is-dragover {
  transform: translateY(-1px) scale(1.01);
  border-color: rgba(0, 113, 227, 0.78);
  background: rgba(0, 113, 227, 0.08);
  box-shadow: 0 0 0 4px rgba(0, 113, 227, 0.12);
}

.upload-box.is-dragover .upload-visual {
  background: linear-gradient(180deg, #fff, #eaf3ff);
}

.upload-box input {
  position: absolute;
  inline-size: 1px;
  block-size: 1px;
  opacity: 0;
  pointer-events: none;
}

.upload-visual {
  display: grid;
  place-items: center;
  width: 54px;
  height: 54px;
  margin-bottom: 12px;
  border-radius: 50%;
  background: linear-gradient(180deg, #fdfdfd, #e9e9ee);
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.1);
}

.upload-visual span {
  position: relative;
  width: 22px;
  height: 22px;
}

.upload-visual span::before,
.upload-visual span::after {
  position: absolute;
  inset: 10px 0 auto;
  height: 2px;
  border-radius: 2px;
  background: var(--blue);
  content: "";
}

.upload-visual span::after {
  transform: rotate(90deg);
}

.upload-title {
  display: block;
  font-size: 18px;
  font-weight: 700;
}

.upload-meta {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 13px;
}

.demo-card {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 12px;
  width: 100%;
  min-height: 82px;
  margin-top: 12px;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  color: var(--ink);
  text-align: left;
  cursor: pointer;
}

.demo-gallery {
  display: grid;
  gap: 8px;
  margin-top: 10px;
}

.demo-gallery .demo-card {
  margin-top: 0;
}

.demo-card:hover {
  border-color: rgba(0, 113, 227, 0.32);
  background: rgba(255, 255, 255, 0.96);
}

.demo-card:focus-visible,
.actions button:focus-visible,
.upload-box:focus-within {
  outline: 3px solid rgba(0, 113, 227, 0.28);
  outline-offset: 2px;
}

.demo-card img {
  width: 84px;
  height: 64px;
  object-fit: cover;
  border-radius: 7px;
}

.demo-card span {
  align-self: center;
  min-width: 0;
}

.demo-card strong,
.demo-card small {
  display: block;
}

.demo-card strong {
  font-size: 14px;
}

.demo-card small {
  margin-top: 4px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.35;
}

.section-heading,
.panel-title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 11px;
}

.section-heading span,
.panel-title p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.section-heading strong,
.panel-title strong {
  font-size: 13px;
}

.segmented {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 6px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(0, 0, 0, 0.04);
}

.segmented input {
  position: absolute;
  opacity: 0;
}

.segmented span {
  display: grid;
  place-items: center;
  height: 36px;
  border-radius: 7px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
}

.segmented input:checked + span {
  background: #fff;
  color: var(--ink);
  box-shadow: 0 3px 12px rgba(0, 0, 0, 0.12);
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.field-grid label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.field-grid input {
  width: 100%;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  color: var(--ink);
  padding: 0 11px;
  outline: none;
}

.field-grid input:focus {
  border-color: rgba(0, 113, 227, 0.65);
  box-shadow: 0 0 0 4px rgba(0, 113, 227, 0.12);
}

.switch-list {
  display: grid;
  gap: 10px;
}

.background-tools {
  display: grid;
  gap: 14px;
}

.switch {
  display: flex;
  flex-direction: row-reverse;
  align-items: center;
  justify-content: space-between;
  min-height: 36px;
  gap: 14px;
  color: var(--ink);
  font-size: 14px;
  font-weight: 600;
}

.switch input {
  position: relative;
  flex: 0 0 auto;
  width: 44px;
  height: 26px;
  margin: 0;
  border: 0;
  border-radius: 999px;
  appearance: none;
  background: #d2d2d7;
  cursor: pointer;
  transition: background 180ms ease;
}

.switch input::after {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.22);
  content: "";
  transition: transform 180ms ease;
}

.switch input:checked {
  background: #34c759;
}

.switch input:checked::after {
  transform: translateX(18px);
}

.range-field {
  display: grid;
  gap: 9px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.range-field span {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.range-field strong {
  color: var(--ink);
  font-size: 13px;
}

.range-field input {
  width: 100%;
  accent-color: var(--blue);
}

.cutout-panel {
  display: grid;
  gap: 12px;
}

.cutout-panel.hidden {
  display: none;
}

.cutout-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.cutout-heading strong {
  color: var(--ink);
  font-size: 12px;
}

.cutout-preview {
  display: grid;
  place-items: center;
  min-height: 148px;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

#cutoutCanvas {
  display: block;
  max-width: 100%;
  height: auto;
  background: #fff;
}

#downloadCutout {
  height: 38px;
  cursor: pointer;
}

.actions {
  display: grid;
  gap: 10px;
}

button {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  color: var(--ink);
  font-weight: 700;
}

.actions button {
  height: 44px;
  cursor: pointer;
}

button.primary {
  border-color: var(--blue);
  background: var(--blue);
  color: #fff;
}

button.primary:hover:not(:disabled) {
  background: var(--blue-dark);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.42;
}

.stage {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  min-width: 0;
  overflow: hidden;
}

.stage-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  min-height: 70px;
  padding: 14px 18px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.07);
  background: rgba(255, 255, 255, 0.78);
}

.stage-toolbar p {
  margin: 0 0 2px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.stage-toolbar strong {
  font-size: 20px;
}

.stats {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.stats span {
  display: inline-grid;
  place-items: center;
  min-height: 30px;
  padding: 0 10px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.055);
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.canvas-wrap {
  position: relative;
  min-height: 600px;
  overflow: auto;
  background:
    linear-gradient(45deg, rgba(0, 0, 0, 0.025) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(0, 0, 0, 0.025) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(0, 0, 0, 0.025) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(0, 0, 0, 0.025) 75%),
    #fbfbfd;
  background-position:
    0 0,
    0 11px,
    11px -11px,
    -11px 0,
    0 0;
  background-size: 22px 22px;
}

#patternCanvas {
  display: block;
  margin: 24px auto;
  max-width: none;
  border-radius: 6px;
  background: #fff;
  box-shadow: 0 18px 46px rgba(0, 0, 0, 0.16);
}

.empty-state {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 8px;
  padding: 24px;
  pointer-events: none;
  text-align: center;
}

.empty-state strong {
  font-size: clamp(26px, 4vw, 44px);
  line-height: 1.1;
}

.empty-state span {
  color: var(--muted);
  font-size: 17px;
}

.empty-state.hidden {
  display: none;
}

.palette-list {
  display: grid;
  gap: 8px;
}

.swatch-row {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  padding: 9px;
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.72);
}

.swatch {
  width: 34px;
  height: 34px;
  border: 1px solid rgba(0, 0, 0, 0.18);
  border-radius: 50%;
}

.swatch-name {
  min-width: 0;
}

.swatch-name strong,
.swatch-count {
  display: block;
  font-size: 13px;
}

.swatch-name span {
  display: block;
  margin-top: 2px;
  overflow: hidden;
  color: var(--muted);
  font-size: 12px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.swatch-count {
  color: var(--blue);
  font-weight: 800;
}

.source-note {
  margin: 14px 0 0;
  color: var(--subtle);
  font-size: 12px;
  line-height: 1.45;
}

@media (max-width: 1180px) {
  .workspace {
    grid-template-columns: 310px minmax(0, 1fr);
  }

  .palette-panel {
    grid-column: 1 / -1;
    max-height: none;
  }
}

@media (max-width: 820px) {
  .app-shell {
    padding: 0 12px 18px;
  }

  .topbar {
    height: 50px;
  }

  .nav-links {
    display: flex;
    gap: 0;
  }

  .nav-links a {
    display: none;
  }

  .nav-links button {
    display: inline-flex;
    align-items: center;
    min-height: 32px;
  }

  .intro {
    margin: 32px auto 24px;
    text-align: left;
  }

  h1 {
    font-size: 42px;
  }

  .intro-copy {
    margin-left: 0;
    font-size: 18px;
  }

  .workspace {
    grid-template-columns: minmax(0, 1fr);
  }

  .control-panel,
  .palette-panel {
    max-height: none;
  }

  .stage-toolbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .stats {
    justify-content: flex-start;
  }

  .canvas-wrap {
    min-height: 520px;
  }
}

/* Final dark premium override, placed last so the redesign wins over legacy light rules. */
:root {
  color-scheme: dark;
  --bg: oklch(0.145 0.014 250);
  --bg-deep: oklch(0.105 0.012 250);
  --surface: oklch(0.205 0.018 250 / 0.88);
  --surface-strong: oklch(0.245 0.02 250);
  --surface-soft: oklch(0.18 0.018 250 / 0.74);
  --ink: oklch(0.94 0.012 260);
  --muted: oklch(0.72 0.026 255);
  --subtle: oklch(0.58 0.025 255);
  --line: oklch(0.92 0.018 255 / 0.13);
  --line-strong: oklch(0.92 0.02 255 / 0.22);
  --blue: oklch(0.68 0.17 248);
  --blue-dark: oklch(0.58 0.16 248);
  --amber: oklch(0.78 0.13 74);
  --copper: oklch(0.64 0.13 42);
  --shadow: 0 28px 90px oklch(0.02 0.008 260 / 0.46);
  --radius: 12px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

html,
body {
  background: oklch(0.105 0.012 250);
}

body {
  background:
    linear-gradient(180deg, oklch(0.18 0.017 250) 0%, oklch(0.145 0.014 250) 43%, oklch(0.105 0.012 250) 100%),
    repeating-linear-gradient(90deg, oklch(1 0 0 / 0.025) 0 1px, transparent 1px 90px),
    repeating-linear-gradient(0deg, oklch(1 0 0 / 0.018) 0 1px, transparent 1px 90px);
  color: var(--ink);
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    linear-gradient(120deg, transparent 0 22%, oklch(0.75 0.13 75 / 0.08) 44%, transparent 66%),
    linear-gradient(300deg, transparent 0 28%, oklch(0.68 0.17 248 / 0.08) 54%, transparent 74%);
  content: "";
}

.login-screen {
  background:
    linear-gradient(180deg, oklch(0.18 0.017 250) 0%, oklch(0.125 0.014 250) 100%),
    repeating-linear-gradient(90deg, oklch(1 0 0 / 0.03) 0 1px, transparent 1px 88px);
}

.login-card,
.control-panel,
.stage,
.palette-panel {
  border-color: var(--line);
  background: linear-gradient(180deg, oklch(0.235 0.019 250 / 0.92), oklch(0.155 0.016 250 / 0.92));
  box-shadow: var(--shadow), inset 0 1px 0 oklch(1 0 0 / 0.06);
}

.login-card {
  border-radius: 22px;
}

.login-card h1,
h1,
.upload-title,
.demo-card strong,
.section-heading span,
.stage-toolbar strong,
.panel-title strong,
.empty-state strong,
.switch,
button,
.swatch-name strong {
  color: var(--ink);
}

.login-copy,
.login-hint,
.login-fields label,
.upload-meta,
.demo-card small,
.stage-toolbar p,
.source-note,
.intro-copy,
.field-grid label,
.range-field,
.cutout-heading,
.panel-title p,
.empty-state span,
.swatch-name span,
.swatch-count,
.nav-links {
  color: var(--muted);
}

.eyebrow {
  color: var(--amber);
}

.topbar {
  max-width: 1520px;
  border-bottom-color: var(--line);
  background: oklch(0.13 0.014 250 / 0.78);
  box-shadow: 0 16px 44px oklch(0.04 0.008 260 / 0.2);
}

.brand {
  color: var(--ink);
}

.brand-mark {
  background:
    radial-gradient(circle at 26% 27%, oklch(0.72 0.18 30) 0 16%, transparent 17%),
    radial-gradient(circle at 74% 27%, var(--amber) 0 16%, transparent 17%),
    radial-gradient(circle at 26% 73%, oklch(0.72 0.12 165) 0 16%, transparent 17%),
    radial-gradient(circle at 74% 73%, var(--blue) 0 16%, transparent 17%),
    oklch(0.18 0.014 250);
  box-shadow: inset 0 0 0 1px var(--line-strong), 0 0 24px oklch(0.68 0.17 248 / 0.16);
}

.nav-links {
  align-items: center;
}

.nav-links a,
.nav-links button {
  min-height: 34px;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 7px 11px;
  background: transparent;
  color: var(--muted);
  transition: background 180ms var(--ease), border-color 180ms var(--ease), color 180ms var(--ease), transform 180ms var(--ease);
}

.nav-links a:hover,
.nav-links button:hover {
  border-color: var(--line);
  background: oklch(1 0 0 / 0.055);
  color: var(--ink);
}

.intro {
  max-width: 1040px;
  margin: 56px auto 36px;
}

h1 {
  font-weight: 780;
  text-wrap: balance;
}

.workspace {
  max-width: 1520px;
  gap: 20px;
}

.panel-section {
  border-bottom-color: var(--line);
}

.upload-box,
.demo-card,
.swatch-row,
.cutout-preview,
.segmented,
.field-grid input,
.login-fields input {
  border-color: var(--line);
  background: oklch(1 0 0 / 0.045);
  color: var(--ink);
}

.upload-box {
  background: linear-gradient(180deg, oklch(0.19 0.018 250 / 0.96), oklch(0.14 0.014 250 / 0.96));
}

.upload-box:hover,
.upload-box.is-dragover,
.demo-card:hover {
  border-color: oklch(0.77 0.13 74 / 0.62);
  background: oklch(1 0 0 / 0.075);
  box-shadow: 0 0 0 4px oklch(0.77 0.13 74 / 0.10), 0 18px 54px oklch(0.02 0.01 260 / 0.28);
}

.upload-visual {
  background: linear-gradient(180deg, oklch(0.28 0.022 250), oklch(0.18 0.018 250));
  box-shadow: inset 0 0 0 1px var(--line-strong), 0 12px 30px oklch(0.02 0.01 260 / 0.34);
}

.upload-visual span::before,
.upload-visual span::after {
  background: var(--amber);
}

.demo-card img {
  filter: saturate(0.92) contrast(1.08);
}

.segmented {
  background: oklch(0.12 0.012 250 / 0.9);
  box-shadow: inset 0 1px 0 oklch(1 0 0 / 0.04);
}

.segmented label span {
  color: var(--muted);
}

.segmented input:checked + span {
  background: linear-gradient(180deg, oklch(0.33 0.04 248), oklch(0.24 0.036 248));
  color: var(--ink);
  box-shadow: 0 10px 28px oklch(0.04 0.012 260 / 0.34), inset 0 1px 0 oklch(1 0 0 / 0.12);
}

.login-fields input,
.field-grid input {
  background: oklch(0.13 0.012 250 / 0.9);
  box-shadow: inset 0 1px 0 oklch(1 0 0 / 0.04);
}

.login-fields input::placeholder {
  color: oklch(0.58 0.024 255);
}

.field-grid input:focus,
.login-fields input:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 4px oklch(0.68 0.17 248 / 0.14);
}

.login-error {
  color: oklch(0.72 0.18 28);
}

.switch input {
  background: oklch(0.31 0.018 250);
  box-shadow: inset 0 0 0 1px var(--line);
}

.switch input::after {
  background: oklch(0.88 0.012 250);
}

.switch input:checked {
  background: linear-gradient(90deg, var(--copper), var(--amber));
}

.range-field strong {
  color: var(--ink);
}

.range-field input {
  accent-color: var(--amber);
}

.cutout-preview {
  background: oklch(0.96 0.006 250);
}

button,
.actions button,
#downloadCutout {
  border-color: var(--line);
  background: oklch(1 0 0 / 0.055);
  color: var(--ink);
  transition: transform 160ms var(--ease), border-color 160ms var(--ease), background 160ms var(--ease), box-shadow 160ms var(--ease);
}

button:hover:not(:disabled),
.actions button:hover:not(:disabled),
#downloadCutout:hover:not(:disabled) {
  transform: translateY(-1px);
  border-color: oklch(0.77 0.13 74 / 0.46);
  background: oklch(1 0 0 / 0.085);
}

button.primary,
.login-submit {
  border-color: oklch(0.82 0.12 74 / 0.5);
  background: linear-gradient(180deg, oklch(0.78 0.13 74), oklch(0.63 0.13 48));
  color: oklch(0.14 0.014 250);
  box-shadow: 0 16px 46px oklch(0.62 0.12 55 / 0.25), inset 0 1px 0 oklch(1 0 0 / 0.3);
}

button.primary:hover:not(:disabled),
.login-submit:hover:not(:disabled) {
  background: linear-gradient(180deg, oklch(0.82 0.13 74), oklch(0.66 0.13 48));
}

.stage-toolbar {
  border-bottom-color: var(--line);
  background: oklch(0.16 0.016 250 / 0.82);
}

.stats span {
  background: oklch(1 0 0 / 0.065);
  color: var(--muted);
}

.canvas-wrap {
  background:
    linear-gradient(45deg, oklch(1 0 0 / 0.03) 25%, transparent 25%),
    linear-gradient(-45deg, oklch(1 0 0 / 0.03) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, oklch(1 0 0 / 0.03) 75%),
    linear-gradient(-45deg, transparent 75%, oklch(1 0 0 / 0.03) 75%),
    oklch(0.105 0.012 250);
  background-position: 0 0, 0 11px, 11px -11px, -11px 0, 0 0;
  background-size: 22px 22px;
}

#patternCanvas {
  box-shadow: 0 24px 70px oklch(0.02 0.01 260 / 0.62), 0 0 0 1px var(--line);
}

.swatch {
  border-color: oklch(0 0 0 / 0.34);
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
.demo-card:focus-visible,
.upload-box:focus-within {
  outline: 3px solid oklch(0.68 0.17 248 / 0.45);
  outline-offset: 2px;
}

@media (max-width: 820px) {
  .intro {
    margin: 34px auto 24px;
  }

  h1 {
    font-size: 40px;
  }

  .nav-links {
    display: flex;
    gap: 0;
  }

  .nav-links a {
    display: none;
  }

  .nav-links button {
    display: inline-flex;
    align-items: center;
    min-height: 32px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 1ms !important;
  }
}

/* Final browser-safe dark override. This must remain the last theme layer. */
:root {
  color-scheme: dark;
  --bg: #0b0d12;
  --bg-deep: #05070b;
  --surface: rgba(24, 27, 36, 0.9);
  --surface-strong: #202632;
  --surface-soft: rgba(17, 20, 29, 0.78);
  --ink: #f4f6fb;
  --muted: #a7adba;
  --subtle: #7d8491;
  --line: rgba(255, 255, 255, 0.12);
  --line-strong: rgba(255, 255, 255, 0.2);
  --blue: #65a7ff;
  --blue-dark: #3d7fe6;
  --amber: #f4c76b;
  --copper: #c77b4a;
  --shadow: 0 28px 90px rgba(0, 0, 0, 0.52);
  --radius: 12px;
}

html,
body {
  background: #0b0d12;
}

body,
.login-screen {
  background:
    linear-gradient(180deg, #151922 0%, #0b0d12 42%, #05070b 100%),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.035) 0 1px, transparent 1px 92px),
    repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.025) 0 1px, transparent 1px 92px);
  color: var(--ink);
}

body::before {
  background:
    linear-gradient(120deg, transparent 0 24%, rgba(244, 199, 107, 0.08) 44%, transparent 66%),
    linear-gradient(300deg, transparent 0 30%, rgba(101, 167, 255, 0.08) 55%, transparent 76%);
}

.login-card,
.control-panel,
.stage,
.palette-panel {
  border-color: var(--line);
  background: linear-gradient(180deg, rgba(32, 38, 50, 0.94), rgba(17, 20, 29, 0.92));
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.07);
}

.topbar,
.stage-toolbar {
  border-bottom-color: var(--line);
  background: rgba(12, 15, 22, 0.82);
  box-shadow: 0 16px 44px rgba(0, 0, 0, 0.22);
}

.brand,
h1,
h2,
h3,
.login-card h1,
.upload-title,
.demo-card strong,
.section-heading span,
.stage-toolbar strong,
.panel-title strong,
.empty-state strong,
.switch,
.swatch-name strong,
button {
  color: var(--ink);
}

.login-copy,
.login-hint,
.login-fields label,
.upload-meta,
.demo-card small,
.stage-toolbar p,
.source-note,
.intro-copy,
.field-grid label,
.range-field,
.cutout-heading,
.panel-title p,
.empty-state span,
.swatch-name span,
.nav-links {
  color: var(--muted);
}

.eyebrow,
.swatch-count {
  color: var(--amber);
}

.brand-mark {
  background:
    radial-gradient(circle at 26% 27%, #e26f58 0 16%, transparent 17%),
    radial-gradient(circle at 74% 27%, #f4c76b 0 16%, transparent 17%),
    radial-gradient(circle at 26% 73%, #65c5a9 0 16%, transparent 17%),
    radial-gradient(circle at 74% 73%, #65a7ff 0 16%, transparent 17%),
    #202632;
  box-shadow: inset 0 0 0 1px var(--line-strong), 0 0 24px rgba(101, 167, 255, 0.16);
}

.upload-box,
.demo-card,
.swatch-row,
.segmented,
.field-grid input,
.login-fields input {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.045);
  color: var(--ink);
}

.upload-box {
  background: linear-gradient(180deg, rgba(32, 38, 50, 0.96), rgba(17, 20, 29, 0.96));
}

.upload-box:hover,
.upload-box.is-dragover,
.demo-card:hover,
button:hover:not(:disabled),
.actions button:hover:not(:disabled),
#downloadCutout:hover:not(:disabled) {
  border-color: rgba(244, 199, 107, 0.5);
  background: rgba(255, 255, 255, 0.08);
}

.upload-visual {
  background: linear-gradient(180deg, #303746, #1d2330);
  box-shadow: inset 0 0 0 1px var(--line-strong), 0 12px 30px rgba(0, 0, 0, 0.34);
}

.upload-visual span::before,
.upload-visual span::after {
  background: var(--amber);
}

.segmented {
  background: rgba(7, 9, 14, 0.9);
}

.segmented label span {
  color: var(--muted);
}

.segmented input:checked + span {
  background: linear-gradient(180deg, #34445f, #26334b);
  color: var(--ink);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.34), inset 0 1px 0 rgba(255, 255, 255, 0.12);
}

.login-fields input,
.field-grid input {
  background: rgba(10, 13, 20, 0.9);
}

.field-grid input:focus,
.login-fields input:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 4px rgba(101, 167, 255, 0.14);
}

.switch input {
  background: #3a414e;
  box-shadow: inset 0 0 0 1px var(--line);
}

.switch input::after {
  background: #e8ebf2;
}

.switch input:checked {
  background: linear-gradient(90deg, var(--copper), var(--amber));
}

button,
.actions button,
#downloadCutout {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.055);
  color: var(--ink);
}

button.primary,
.login-submit {
  border-color: rgba(244, 199, 107, 0.5);
  background: linear-gradient(180deg, #f4c76b, #c77b4a);
  color: #12151d;
  box-shadow: 0 16px 46px rgba(199, 123, 74, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.cutout-preview {
  background: #f7f8fb;
}

.canvas-wrap {
  background:
    linear-gradient(45deg, rgba(255, 255, 255, 0.03) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(255, 255, 255, 0.03) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(255, 255, 255, 0.03) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(255, 255, 255, 0.03) 75%),
    #080a0f;
  background-position: 0 0, 0 11px, 11px -11px, -11px 0, 0 0;
  background-size: 22px 22px;
}

#patternCanvas {
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.62), 0 0 0 1px var(--line);
}