:root {
  /* Bordeaux Velvet & Rose Gold (Primary Palette) */
  --color-obsidian-rgb: 17, 9, 12;
  --color-charcoal-rgb: 27, 15, 21;
  --color-espresso-rgb: 40, 20, 31;
  --color-gold-rgb: 216, 144, 125;
  --color-amber-rgb: 234, 167, 150;
  --color-felt-rgb: 59, 20, 35;
  --color-slate-rgb: 46, 24, 34;
  --color-ivory-rgb: 251, 244, 245;
  --color-silver-rgb: 221, 208, 212;

  --color-obsidian: #11090C;
  --color-charcoal: #1B0F15;
  --color-espresso: #28141F;
  --color-gold: #D8907D;
  --color-amber: #EAA796;
  --color-felt: #3B1423;
  --color-slate: #2E1822;
  --color-ivory: #FBF4F5;
  --color-silver: #DDD0D4;

  --font-heading: "Playfair Display", Georgia, "Times New Roman", serif;
  --font-body: "Inter", "Helvetica Neue", Arial, sans-serif;

  --text-display: clamp(2.25rem, 5vw + 1rem, 3.5rem);
  --text-h1: clamp(1.875rem, 3.5vw + 0.75rem, 2.5rem);
  --text-h2: clamp(1.5rem, 2.5vw + 0.5rem, 2rem);
  --text-h3: clamp(1.25rem, 1.5vw + 0.5rem, 1.5rem);
  --text-body: 1rem;
  --text-small: 0.875rem;
  --text-caption: 0.75rem;

  --leading-display: 1.1;
  --leading-h1: 1.2;
  --leading-h2: 1.3;
  --leading-h3: 1.4;
  --leading-body: 1.6;
  --leading-small: 1.5;
  --leading-caption: 1.4;

  --weight-display: 700;
  --weight-h1: 700;
  --weight-h2: 600;
  --weight-h3: 600;
  --weight-body: 400;
  --weight-small: 400;
  --weight-caption: 500;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 32px;
  --space-6: 48px;
  --space-7: 64px;
  --space-8: 96px;
  --space-9: 128px;

  --container-max: 1200px;
  --container-gutter: 24px;
  --container-pad: clamp(16px, 3vw, 24px);

  --surface-bg: var(--color-charcoal);
  --surface-accent-bg: var(--color-espresso);
  --surface-neutral: var(--color-slate);

  --border-card: 1px solid rgba(var(--color-gold-rgb), 0.15);
  --border-gold: 1px solid var(--color-gold);
  --border-slate: 1px solid var(--color-slate);

  --shadow-elevation: 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-lift: 0 8px 24px rgba(0, 0, 0, 0.4);

  --radius-sharp: 0px;
  --radius-small: 4px;

  --transition-fast: 0.2s ease;
  --transition-medium: 0.3s ease;

  --focus-ring: 2px solid var(--color-gold);
  --focus-offset: 2px;
}

/* Alternative Theme Presets */
:root[data-theme="bourbon"] {
  --color-obsidian-rgb: 15, 12, 10;
  --color-charcoal-rgb: 25, 20, 17;
  --color-espresso-rgb: 36, 27, 22;
  --color-gold-rgb: 217, 130, 54;
  --color-amber-rgb: 235, 158, 82;
  --color-felt-rgb: 45, 35, 25;
  --color-slate-rgb: 40, 32, 27;
  --color-ivory-rgb: 250, 244, 238;
  --color-silver-rgb: 217, 209, 199;

  --color-obsidian: #0E0B09;
  --color-charcoal: #1A1411;
  --color-espresso: #261B16;
  --color-gold: #D97E38;
  --color-amber: #ED9B4A;
  --color-felt: #2E2218;
  --color-slate: #28201B;
  --color-ivory: #FAF4ED;
  --color-silver: #DCD2C7;
}

:root[data-theme="emerald"] {
  --color-obsidian-rgb: 9, 17, 13;
  --color-charcoal-rgb: 17, 29, 23;
  --color-espresso-rgb: 22, 36, 28;
  --color-gold-rgb: 200, 168, 94;
  --color-amber-rgb: 219, 190, 120;
  --color-felt-rgb: 26, 66, 45;
  --color-slate-rgb: 28, 43, 34;
  --color-ivory-rgb: 247, 248, 244;
  --color-silver-rgb: 207, 214, 208;

  --color-obsidian: #09120D;
  --color-charcoal: #101E17;
  --color-espresso: #16261E;
  --color-gold: #C8A85E;
  --color-amber: #DFBF7A;
  --color-felt: #184A31;
  --color-slate: #1B2A22;
  --color-ivory: #F7F8F4;
  --color-silver: #CFD7D1;
}

:root[data-theme="sapphire"] {
  --color-obsidian-rgb: 9, 13, 21;
  --color-charcoal-rgb: 16, 23, 36;
  --color-espresso-rgb: 23, 32, 51;
  --color-gold-rgb: 223, 198, 148;
  --color-amber-rgb: 240, 220, 179;
  --color-felt-rgb: 20, 41, 61;
  --color-slate-rgb: 25, 37, 56;
  --color-ivory-rgb: 243, 246, 251;
  --color-silver-rgb: 201, 211, 224;

  --color-obsidian: #080C14;
  --color-charcoal: #0F1826;
  --color-espresso: #172338;
  --color-gold: #DFC694;
  --color-amber: #EEDBB6;
  --color-felt: #142C44;
  --color-slate: #19273C;
  --color-ivory: #F3F6FA;
  --color-silver: #C8D3E2;
}

:root[data-theme="classic-gold"] {
  --color-obsidian-rgb: 13, 14, 18;
  --color-charcoal-rgb: 20, 22, 31;
  --color-espresso-rgb: 28, 22, 19;
  --color-gold-rgb: 212, 175, 55;
  --color-amber-rgb: 229, 169, 60;
  --color-felt-rgb: 27, 56, 43;
  --color-slate-rgb: 35, 43, 43;
  --color-ivory-rgb: 245, 245, 247;
  --color-silver-rgb: 224, 224, 230;

  --color-obsidian: #0D0E12;
  --color-charcoal: #14161F;
  --color-espresso: #1C1613;
  --color-gold: #D4AF37;
  --color-amber: #E5A93C;
  --color-felt: #1B382B;
  --color-slate: #232B2B;
  --color-ivory: #F5F5F7;
  --color-silver: #E0E0E6;
}

:root[data-theme="noir"] {
  --color-obsidian-rgb: 10, 10, 11;
  --color-charcoal-rgb: 19, 19, 22;
  --color-espresso-rgb: 28, 28, 33;
  --color-gold-rgb: 229, 211, 175;
  --color-amber-rgb: 242, 228, 198;
  --color-felt-rgb: 26, 36, 30;
  --color-slate-rgb: 36, 36, 43;
  --color-ivory-rgb: 247, 247, 248;
  --color-silver-rgb: 209, 209, 216;

  --color-obsidian: #090A0B;
  --color-charcoal: #121316;
  --color-espresso: #1B1C22;
  --color-gold: #E5D3AF;
  --color-amber: #F2E4C6;
  --color-felt: #1C2620;
  --color-slate: #25262D;
  --color-ivory: #F8F8F9;
  --color-silver: #D1D1D8;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-body);
  font-size: var(--text-body);
  font-weight: var(--weight-body);
  line-height: var(--leading-body);
  color: var(--color-silver);
  background-color: var(--color-obsidian);
  min-height: 100vh;
  min-width: 320px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  color: var(--color-ivory);
  font-weight: var(--weight-h1);
  line-height: var(--leading-h1);
  margin-block-end: var(--space-4);
  text-wrap: balance;
}

h1 {
  font-size: var(--text-h1);
  line-height: var(--leading-h1);
  font-weight: var(--weight-h1);
}

h2 {
  font-size: var(--text-h2);
  line-height: var(--leading-h2);
  font-weight: var(--weight-h2);
}

h3 {
  font-size: var(--text-h3);
  line-height: var(--leading-h3);
  font-weight: var(--weight-h3);
}

h4 {
  font-size: 1.125rem;
  line-height: 1.4;
  font-weight: 600;
}

h5 {
  font-size: 1rem;
  line-height: 1.5;
  font-weight: 600;
}

h6 {
  font-size: var(--text-small);
  line-height: var(--leading-small);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

p {
  font-size: var(--text-body);
  line-height: var(--leading-body);
  color: var(--color-silver);
  margin-block-end: var(--space-4);
}

p:last-child {
  margin-block-end: 0;
}

a {
  color: var(--color-gold);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

a:focus-visible {
  outline: var(--focus-ring);
  outline-offset: var(--focus-offset);
  border-radius: var(--radius-small);
}

ul,
ol {
  margin-block-end: var(--space-4);
  padding-inline-start: var(--space-5);
}

ul:last-child,
ol:last-child {
  margin-block-end: 0;
}

li {
  line-height: var(--leading-body);
}

blockquote {
  margin-block-end: var(--space-4);
  padding-inline-start: var(--space-4);
  border-inline-start: 3px solid var(--color-gold);
  color: var(--color-ivory);
  font-style: italic;
}

blockquote:last-child {
  margin-block-end: 0;
}

figure {
  margin-block-end: var(--space-4);
}

figure:last-child {
  margin-block-end: 0;
}

figcaption {
  font-size: var(--text-small);
  line-height: var(--leading-small);
  color: var(--color-silver);
  margin-block-start: var(--space-2);
}

img,
picture,
svg,
video,
canvas {
  display: block;
  max-width: 100%;
  height: auto;
}

img {
  object-fit: cover;
}

hr {
  border: none;
  border-block-start: 1px solid rgba(var(--color-gold-rgb), 0.15);
  margin-block: var(--space-6);
}

code,
pre,
kbd,
samp {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.9em;
}

pre {
  background-color: var(--color-charcoal);
  border: var(--border-card);
  border-radius: var(--radius-small);
  padding: var(--space-4);
  overflow-x: auto;
  margin-block-end: var(--space-4);
}

pre:last-child {
  margin-block-end: 0;
}

code {
  background-color: var(--color-charcoal);
  padding: 2px 6px;
  border-radius: var(--radius-small);
  color: var(--color-amber);
}

pre code {
  background-color: transparent;
  padding: 0;
  border-radius: 0;
  color: inherit;
}

small {
  font-size: var(--text-small);
  line-height: var(--leading-small);
}

strong,
b {
  font-weight: 600;
  color: var(--color-ivory);
}

em,
i {
  font-style: italic;
}

mark {
  background-color: rgba(var(--color-gold-rgb), 0.25);
  color: var(--color-ivory);
  padding: 0 2px;
}

abbr[title] {
  text-decoration: underline dotted;
  cursor: help;
}

address {
  font-style: normal;
  line-height: var(--leading-body);
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-block-end: var(--space-4);
  font-size: var(--text-small);
  line-height: var(--leading-small);
}

table:last-child {
  margin-block-end: 0;
}

caption {
  font-size: var(--text-caption);
  line-height: var(--leading-caption);
  color: var(--color-silver);
  text-align: start;
  margin-block-end: var(--space-2);
}

th,
td {
  padding: var(--space-3);
  text-align: start;
  border-block-end: 1px solid rgba(var(--color-gold-rgb), 0.1);
}

th {
  font-weight: 600;
  color: var(--color-ivory);
  background-color: rgba(var(--color-gold-rgb), 0.05);
}

button,
input,
select,
textarea {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
  color: inherit;
  background-color: transparent;
  border: none;
  border-radius: 0;
  appearance: none;
  -webkit-appearance: none;
}

button {
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  font-weight: 600;
  font-size: var(--text-body);
  line-height: 1.2;
  background-color: var(--color-gold);
  color: var(--color-obsidian);
  border: 1px solid var(--color-gold);
  border-radius: var(--radius-sharp);
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
  text-align: center;
  min-height: 48px;
}

button:hover {
  background-color: var(--color-amber);
  border-color: var(--color-amber);
  color: var(--color-obsidian);
}

button:focus-visible {
  outline: var(--focus-ring);
  outline-offset: var(--focus-offset);
}

button:disabled,
button[aria-disabled="true"] {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

input,
select,
textarea {
  width: 100%;
  background-color: var(--color-obsidian);
  border: 1px solid rgba(var(--color-gold-rgb), 0.25);
  border-radius: var(--radius-sharp);
  padding: var(--space-3);
  color: var(--color-ivory);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  min-height: 48px;
}

input::placeholder,
textarea::placeholder {
  color: rgba(var(--color-silver-rgb), 0.5);
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--color-gold);
  box-shadow: 0 0 0 1px var(--color-gold);
}

input[type="checkbox"],
input[type="radio"] {
  width: auto;
  min-height: auto;
  padding: 0;
  accent-color: var(--color-gold);
  cursor: pointer;
}

input[type="checkbox"] {
  width: 18px;
  height: 18px;
}

input[type="radio"] {
  width: 18px;
  height: 18px;
  border-radius: 50%;
}

select {
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23D8907D' stroke-width='2' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-3) center;
  padding-inline-end: var(--space-6);
}

textarea {
  resize: vertical;
  min-height: 120px;
}

label {
  display: block;
  font-size: var(--text-small);
  font-weight: 500;
  color: var(--color-ivory);
  margin-block-end: var(--space-2);
}

fieldset {
  border: 1px solid rgba(var(--color-gold-rgb), 0.15);
  padding: var(--space-4);
  margin-block-end: var(--space-4);
}

fieldset:last-child {
  margin-block-end: 0;
}

legend {
  font-size: var(--text-small);
  font-weight: 600;
  color: var(--color-ivory);
  padding-inline: var(--space-2);
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-gutter);
}

.container--wide {
  max-width: 1400px;
}

.surface-card {
  background-color: var(--surface-bg);
  border: var(--border-card);
  border-radius: var(--radius-sharp);
  padding: var(--container-pad);
}

.surface-accent {
  background-color: var(--surface-accent-bg);
  border: var(--border-card);
  border-radius: var(--radius-sharp);
  padding: var(--container-pad);
}

.surface-neutral {
  background-color: var(--surface-neutral);
  border: var(--border-slate);
  border-radius: var(--radius-sharp);
  padding: var(--container-pad);
}

.surface-felt {
  background-color: var(--color-felt);
  border: var(--border-card);
  border-radius: var(--radius-sharp);
  padding: var(--container-pad);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  font-weight: 600;
  font-size: var(--text-body);
  line-height: 1.2;
  background-color: var(--color-gold);
  color: var(--color-obsidian);
  border: 1px solid var(--color-gold);
  border-radius: var(--radius-sharp);
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
  text-align: center;
  min-height: 48px;
  text-decoration: none;
  cursor: pointer;
}

.btn:hover {
  background-color: var(--color-amber);
  border-color: var(--color-amber);
  color: var(--color-obsidian);
}

.btn:focus-visible {
  outline: var(--focus-ring);
  outline-offset: var(--focus-offset);
}

.btn--outline {
  background-color: transparent;
  color: var(--color-gold);
  border-color: var(--color-gold);
}

.btn--outline:hover {
  background-color: rgba(var(--color-gold-rgb), 0.1);
  border-color: var(--color-amber);
  color: var(--color-amber);
}

.btn--ghost {
  background-color: transparent;
  color: var(--color-silver);
  border-color: rgba(var(--color-silver-rgb), 0.3);
}

.btn--ghost:hover {
  background-color: rgba(var(--color-silver-rgb), 0.05);
  border-color: rgba(var(--color-silver-rgb), 0.5);
  color: var(--color-ivory);
}

.btn--small {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-small);
  min-height: 36px;
}

.btn--large {
  padding: var(--space-4) var(--space-6);
  font-size: 1.125rem;
  min-height: 56px;
}

.btn--block {
  display: flex;
  width: 100%;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  font-size: var(--text-caption);
  font-weight: var(--weight-caption);
  line-height: var(--leading-caption);
  color: var(--color-ivory);
  background-color: rgba(var(--color-gold-rgb), 0.15);
  border: 1px solid rgba(var(--color-gold-rgb), 0.3);
  border-radius: var(--radius-small);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge--gold {
  background-color: var(--color-gold);
  color: var(--color-obsidian);
  border-color: var(--color-gold);
}

.badge--felt {
  background-color: var(--color-felt);
  color: var(--color-ivory);
  border-color: rgba(var(--color-gold-rgb), 0.3);
}

.flex {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  min-width: 0;
}

.flex > * {
  min-width: 0;
  flex-shrink: 1;
}

.flex--nowrap {
  flex-wrap: nowrap;
}

.flex--column {
  flex-direction: column;
}

.flex--center {
  align-items: center;
  justify-content: center;
}

.flex--between {
  align-items: center;
  justify-content: space-between;
}

.flex--start {
  align-items: flex-start;
  justify-content: flex-start;
}

.flex--end {
  align-items: flex-end;
  justify-content: flex-end;
}

.flex--stretch {
  align-items: stretch;
  justify-content: flex-start;
}

.flex--gap-1 { gap: var(--space-1); }
.flex--gap-2 { gap: var(--space-2); }
.flex--gap-3 { gap: var(--space-3); }
.flex--gap-4 { gap: var(--space-4); }
.flex--gap-5 { gap: var(--space-5); }
.flex--gap-6 { gap: var(--space-6); }

.section {
  padding-block: var(--space-8);
}

.section--compact {
  padding-block: var(--space-6);
}

.section--relaxed {
  padding-block: var(--space-9);
}

.section--flush {
  padding-block: 0;
}

.section-heading {
  margin-block-end: var(--space-6);
}

.section-heading__title {
  margin-block-end: var(--space-3);
}

.section-heading__subtitle {
  font-size: var(--text-small);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-gold);
  margin-block-end: var(--space-2);
}

.section-heading__description {
  color: var(--color-silver);
  max-width: 720px;
}

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

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  z-index: 10000;
  background-color: var(--color-gold);
  color: var(--color-obsidian);
  padding: var(--space-3) var(--space-4);
  font-weight: 600;
  border-radius: var(--radius-sharp);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-4);
}

@media (max-width: 768px) {
  .container {
    padding-inline: var(--space-3);
  }

  .section {
    padding-block: var(--space-7);
  }

  .section--compact {
    padding-block: var(--space-5);
  }

  .section--relaxed {
    padding-block: var(--space-8);
  }

  .surface-card,
  .surface-accent,
  .surface-neutral,
  .surface-felt {
    padding: var(--space-3);
  }

  .btn {
    padding: var(--space-3) var(--space-4);
  }

  .btn--large {
    padding: var(--space-3) var(--space-5);
    font-size: var(--text-body);
  }
}

@media (max-width: 480px) {
  .container {
    padding-inline: var(--space-3);
  }

  .flex--column-mobile {
    flex-direction: column;
  }

  .flex--nowrap-mobile {
    flex-wrap: nowrap;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}