:root {
  --ocean-950: #071A24;
  --ocean-900: #0C2531;
  --ocean-700: #153B4A;
  --ivory-50: #F7F1E6;
  --ivory-100: #EFE6D6;
  --timber-800: #2A1F18;
  --timber-600: #4A3528;
  --sage-500: #7F8F72;
  --sage-200: #D9DFD2;
  --brass-400: #C6A15B;
  --brass-200: #E4CFA3;
  --ink-900: #1A1A18;
  --error-500: #B5533C;

  --font-heading: "Fraunces", Georgia, serif;
  --font-body: "Inter", system-ui, sans-serif;

  --text-display: clamp(3.25rem, 7vw, 6rem);
  --text-h1: clamp(2.5rem, 5vw, 4.25rem);
  --text-h2: clamp(2rem, 3.5vw, 3rem);
  --text-h3: clamp(1.5rem, 2.4vw, 2rem);
  --text-h4: 1.25rem;
  --text-body-lg: 1.125rem;
  --text-body: 1rem;
  --text-body-sm: 0.875rem;
  --text-label: 0.75rem;
  --text-caption: 0.8125rem;

  --leading-display: 0.98;
  --leading-h1: 1.02;
  --leading-h2: 1.08;
  --leading-h3: 1.15;
  --leading-h4: 1.25;
  --leading-body-lg: 1.65;
  --leading-body: 1.65;
  --leading-body-sm: 1.55;
  --leading-label: 1.2;
  --leading-caption: 1.45;

  --tracking-display: -0.02em;
  --tracking-h1: -0.015em;
  --tracking-h2: -0.01em;
  --tracking-h3: 0;
  --tracking-h4: 0.01em;
  --tracking-label: 0.12em;
  --tracking-caption: 0.01em;

  --space-2xs: 4px;
  --space-xs: 8px;
  --space-sm: 12px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 96px;
  --space-5xl: 128px;
  --space-6xl: 160px;

  --container-standard: 1200px;
  --container-wide: 1440px;
  --container-reading: 760px;

  --radius-0: 0px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-round: 999px;

  --shadow-float: 0 12px 32px rgba(7, 26, 36, 0.35);

  --transition-fast: 180ms ease-out;
  --transition-base: 200ms ease-out;
  --transition-slow: 220ms ease-out;

  --focus-outline: 2px solid var(--brass-200);
  --focus-offset: 2px;
}

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: var(--text-body);
  line-height: var(--leading-body);
  font-weight: 400;
  color: var(--ivory-50);
  background-color: var(--ocean-950);
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

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

input,
button,
textarea,
select {
  font: inherit;
  color: inherit;
}

button {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

a {
  color: var(--brass-400);
  text-decoration: none;
  transition: color var(--transition-fast), border-color var(--transition-fast), opacity var(--transition-fast);
}

a:hover {
  color: var(--brass-200);
}

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 400;
  color: var(--ivory-50);
  line-height: var(--leading-h2);
  letter-spacing: var(--tracking-h2);
}

h1 {
  font-size: var(--text-h1);
  line-height: var(--leading-h1);
  letter-spacing: var(--tracking-h1);
  font-weight: 300;
  margin-block-end: var(--space-lg);
}

h2 {
  font-size: var(--text-h2);
  line-height: var(--leading-h2);
  letter-spacing: var(--tracking-h2);
  font-weight: 400;
  margin-block-end: var(--space-lg);
}

h3 {
  font-size: var(--text-h3);
  line-height: var(--leading-h3);
  letter-spacing: var(--tracking-h3);
  font-weight: 400;
  margin-block-end: var(--space-md);
}

h4 {
  font-family: var(--font-body);
  font-size: var(--text-h4);
  line-height: var(--leading-h4);
  letter-spacing: var(--tracking-h4);
  font-weight: 600;
  margin-block-end: var(--space-md);
}

p {
  font-family: var(--font-body);
  font-size: var(--text-body);
  line-height: var(--leading-body);
  font-weight: 400;
  color: var(--ivory-50);
  margin-block-end: var(--space-md);
}

blockquote {
  font-family: var(--font-heading);
  font-size: var(--text-h3);
  line-height: var(--leading-h3);
  letter-spacing: var(--tracking-h3);
  font-weight: 300;
  color: var(--ivory-50);
  margin-block-end: var(--space-lg);
  padding-inline-start: var(--space-lg);
  border-inline-start: 2px solid var(--brass-400);
}

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

ul {
  list-style: disc;
}

ol {
  list-style: decimal;
}

li {
  color: var(--ivory-50);
}

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

figcaption {
  font-size: var(--text-caption);
  line-height: var(--leading-caption);
  letter-spacing: var(--tracking-caption);
  color: var(--ivory-100);
  margin-block-start: var(--space-xs);
}

hr {
  border: none;
  border-block-start: 1px solid var(--ocean-700);
  margin-block: var(--space-xl);
}

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

th,
td {
  text-align: start;
  padding: var(--space-sm) var(--space-md);
  border-block-end: 1px solid var(--ocean-700);
  color: var(--ivory-50);
}

th {
  font-weight: 600;
  color: var(--ivory-50);
  letter-spacing: var(--tracking-label);
  font-size: var(--text-label);
  text-transform: uppercase;
}

label {
  display: block;
  font-size: var(--text-label);
  line-height: var(--leading-label);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  font-weight: 600;
  color: var(--ivory-50);
  margin-block-end: var(--space-xs);
}

input,
textarea,
select {
  display: block;
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-body);
  font-size: var(--text-body);
  line-height: var(--leading-body);
  color: var(--ivory-50);
  background-color: var(--ocean-900);
  border: 1px solid var(--ocean-700);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

input::placeholder,
textarea::placeholder {
  color: var(--ivory-100);
  opacity: 0.7;
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--brass-400);
  box-shadow: 0 0 0 2px var(--brass-200);
}

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

select {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  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='%23C6A15B' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-md) center;
  padding-inline-end: var(--space-2xl);
}

fieldset {
  border: 1px solid var(--ocean-700);
  border-radius: var(--radius-sm);
  padding: var(--space-lg);
  margin-block-end: var(--space-lg);
}

legend {
  font-size: var(--text-label);
  line-height: var(--leading-label);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  font-weight: 600;
  color: var(--ivory-50);
  padding-inline: var(--space-xs);
}

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

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

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

.surface-ocean {
  background-color: var(--ocean-950);
  color: var(--ivory-50);
}

.surface-ocean-elevated {
  background-color: var(--ocean-900);
  color: var(--ivory-50);
}

.surface-timber {
  background-color: var(--timber-800);
  color: var(--ivory-50);
}

.surface-ivory {
  background-color: var(--ivory-50);
  color: var(--ink-900);
}

.surface-ivory .h1,
.surface-ivory h1,
.surface-ivory .h2,
.surface-ivory h2,
.surface-ivory .h3,
.surface-ivory h3,
.surface-ivory .h4,
.surface-ivory h4,
.surface-ivory p,
.surface-ivory li,
.surface-ivory blockquote,
.surface-ivory th,
.surface-ivory td,
.surface-ivory label,
.surface-ivory legend {
  color: var(--ink-900);
}

.surface-ivory a {
  color: var(--brass-400);
}

.surface-ivory a:hover {
  color: var(--brass-200);
}

.surface-ivory input,
.surface-ivory textarea,
.surface-ivory select {
  background-color: var(--ivory-100);
  border-color: var(--timber-600);
  color: var(--ink-900);
}

.surface-ivory input::placeholder,
.surface-ivory textarea::placeholder {
  color: var(--ink-900);
  opacity: 0.6;
}

.surface-ivory hr {
  border-block-start-color: var(--timber-600);
}

.surface-ivory th,
.surface-ivory td {
  border-block-end-color: var(--timber-600);
}

.surface-ivory fieldset {
  border-color: var(--timber-600);
}

.label {
  display: inline-block;
  font-size: var(--text-label);
  line-height: var(--leading-label);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  font-weight: 600;
  color: var(--sage-500);
}

.label-brass {
  color: var(--brass-400);
}

.label-sage {
  color: var(--sage-500);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-lg);
  font-family: var(--font-body);
  font-size: var(--text-body-sm);
  line-height: var(--leading-body-sm);
  font-weight: 600;
  letter-spacing: 0.02em;
  text-decoration: none;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), opacity var(--transition-fast);
  min-height: 44px;
}

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

.btn-primary {
  background-color: var(--brass-400);
  color: var(--ocean-950);
  border-color: var(--brass-400);
}

.btn-primary:hover {
  background-color: var(--brass-200);
  border-color: var(--brass-200);
  color: var(--ocean-950);
}

.btn-secondary {
  background-color: transparent;
  color: var(--ivory-50);
  border-color: var(--brass-400);
}

.btn-secondary:hover {
  background-color: var(--brass-400);
  color: var(--ocean-950);
}

.btn-ghost {
  background-color: transparent;
  color: var(--ivory-50);
  border-color: var(--ocean-700);
}

.btn-ghost:hover {
  border-color: var(--brass-400);
  color: var(--brass-200);
}

.surface-ivory .btn-secondary {
  color: var(--ink-900);
  border-color: var(--brass-400);
}

.surface-ivory .btn-secondary:hover {
  background-color: var(--brass-400);
  color: var(--ocean-950);
}

.surface-ivory .btn-ghost {
  color: var(--ink-900);
  border-color: var(--timber-600);
}

.surface-ivory .btn-ghost:hover {
  border-color: var(--brass-400);
  color: var(--brass-400);
}

.card {
  background-color: var(--ocean-900);
  border: 1px solid var(--ocean-700);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
}

.card-timber {
  background-color: var(--timber-800);
  border: 1px solid var(--timber-600);
}

.card-ivory {
  background-color: var(--ivory-50);
  border: 1px solid var(--timber-600);
  color: var(--ink-900);
}

.card-ivory h1,
.card-ivory h2,
.card-ivory h3,
.card-ivory h4,
.card-ivory p,
.card-ivory li,
.card-ivory blockquote {
  color: var(--ink-900);
}

.card-accent {
  border-block-start: 1px solid var(--brass-400);
}

.card > :last-child,
.card-timber > :last-child,
.card-ivory > :last-child,
.panel > :last-child {
  margin-block-end: 0;
}

.divider {
  border: none;
  border-block-start: 1px solid var(--ocean-700);
  margin-block: var(--space-lg);
}

.divider-timber {
  border-block-start-color: var(--timber-600);
}

.divider-brass {
  border-block-start-color: var(--brass-400);
}

.flex-row {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  gap: var(--space-md);
}

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

.flex-column {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

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

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  flex-wrap: wrap;
}

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

.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-lg);
  z-index: 9999;
  padding: var(--space-sm) var(--space-lg);
  background-color: var(--brass-400);
  color: var(--ocean-950);
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: top var(--transition-fast);
}

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

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

::selection {
  background-color: var(--brass-400);
  color: var(--ocean-950);
}

@media (min-width: 768px) {
  .container,
  .container-wide,
  .container-reading {
    padding-inline: var(--space-2xl);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}