/* ============ base.css ============ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  -moz-text-size-adjust: none;
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  hanging-punctuation: first last;
  scroll-padding-top: var(--space-16);
}

body {
  min-height: 100dvh;
  line-height: 1.6;
  font-family: var(--font-body, sans-serif);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
}

img, picture, video, canvas, svg { display: block; max-width: 100%; height: auto; }
ul[role='list'], ol[role='list'] { list-style: none; }
input, button, textarea, select { font: inherit; color: inherit; }

h1, h2, h3, h4, h5, h6 { text-wrap: balance; line-height: 1.15; }
p, li, figcaption { text-wrap: pretty; max-width: 72ch; }

::selection { background: color-mix(in oklab, var(--color-primary) 30%, transparent); color: var(--color-text); }

:focus-visible {
  outline: 2px solid var(--color-gold);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

@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;
  }
}

button { cursor: pointer; background: none; border: none; }
table { border-collapse: collapse; width: 100%; }

a, button, [role='button'], [role='link'], input, textarea, select {
  transition: color var(--transition-interactive), background var(--transition-interactive),
    border-color var(--transition-interactive), box-shadow var(--transition-interactive),
    transform var(--transition-interactive);
}

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

/* ============ design tokens ============ */
:root, [data-theme='light'] {
  --color-bg: #f6f3ea;
  --color-surface: #ffffff;
  --color-surface-2: #fbf9f2;
  --color-surface-offset: #eeeadd;
  --color-divider: #e2ddcd;
  --color-border: #d9d3bf;

  --color-text: #191811;
  --color-text-muted: #63604f;
  --color-text-faint: #9a9580;
  --color-text-inverse: #f6f3ea;

  --color-primary: #1f4d3a;
  --color-primary-hover: #163a2b;
  --color-primary-active: #0f2b20;
  --color-primary-highlight: #d7e3da;

  --color-gold: #a9822f;
  --color-gold-hover: #8c6a22;
  --color-gold-active: #6f5319;
  --color-gold-highlight: #ecdfbf;

  --color-error: #8a2f2f;
  --color-error-highlight: #e9d3d3;
  --color-success: #2f6b4f;
  --color-success-highlight: #d7e3da;

  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.9rem;
  --radius-xl: 1.4rem;
  --radius-full: 9999px;

  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  --shadow-sm: 0 1px 2px oklch(0.2 0.02 90 / 0.08);
  --shadow-md: 0 8px 24px oklch(0.2 0.02 90 / 0.10);
  --shadow-lg: 0 20px 48px oklch(0.15 0.02 90 / 0.16);

  --content-narrow: 640px;
  --content-default: 980px;
  --content-wide: 1280px;

  --font-display: 'Cabinet Grotesk', 'Arial Black', sans-serif;
  --font-body: 'Satoshi', 'Helvetica Neue', sans-serif;
}

[data-theme='dark'] {
  --color-bg: #0b0c09;
  --color-surface: #14150f;
  --color-surface-2: #191a13;
  --color-surface-offset: #1e1f17;
  --color-divider: #2a2b21;
  --color-border: #34352a;

  --color-text: #f2efe4;
  --color-text-muted: #aca88f;
  --color-text-faint: #6f6c5b;
  --color-text-inverse: #14150f;

  --color-primary: #4f9273;
  --color-primary-hover: #6bab8c;
  --color-primary-active: #3c7359;
  --color-primary-highlight: #21322b;

  --color-gold: #d3ab5a;
  --color-gold-hover: #e0bd77;
  --color-gold-active: #b58c40;
  --color-gold-highlight: #362c19;

  --color-error: #cf7a7a;
  --color-error-highlight: #382222;
  --color-success: #6bab8c;
  --color-success-highlight: #21322b;

  --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.3);
  --shadow-md: 0 8px 24px oklch(0 0 0 / 0.4);
  --shadow-lg: 0 24px 56px oklch(0 0 0 / 0.55);
}

:root {
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.25rem);
  --text-3xl: clamp(2.5rem, 1rem + 4vw, 4.75rem);
  --text-hero: clamp(2.75rem, 0.5rem + 6vw, 6.5rem);

  --space-1: 0.25rem; --space-2: 0.5rem; --space-3: 0.75rem; --space-4: 1rem;
  --space-5: 1.25rem; --space-6: 1.5rem; --space-8: 2rem; --space-10: 2.5rem;
  --space-12: 3rem; --space-16: 4rem; --space-20: 5rem; --space-24: 6rem; --space-32: 8rem;
}

/* ============ layout primitives ============ */
.wrap {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: clamp(var(--space-5), 5vw, var(--space-16));
}

.wrap--narrow { max-width: var(--content-default); }

section { padding-block: clamp(var(--space-16), 9vw, var(--space-32)); }

.eyebrow {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-gold);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.eyebrow::before {
  content: '';
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--color-gold);
  display: inline-block;
}

h2.section-title {
  font-family: var(--font-display);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: -0.01em;
  font-size: var(--text-xl);
  margin-top: var(--space-3);
  max-width: 20ch;
}

.lede {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  font-weight: 400;
  max-width: 46ch;
  margin-top: var(--space-4);
}

.lede + .lede { margin-top: var(--space-2); }

.inline-link {
  color: var(--color-gold);
  text-decoration: underline;
  text-decoration-color: color-mix(in oklab, var(--color-gold) 45%, transparent);
  text-underline-offset: 0.15em;
}
.inline-link:hover { color: var(--color-gold-hover); }

/* ============ buttons ============ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--text-sm);
  letter-spacing: 0.01em;
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-full);
  min-height: 44px;
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-gold);
  color: #171509;
}
.btn--primary:hover { background: var(--color-gold-hover); }
.btn--primary:active { background: var(--color-gold-active); }

.btn--ghost {
  background: transparent;
  color: var(--color-text);
  border: 1px solid color-mix(in oklab, var(--color-text) 30%, transparent);
}
.btn--ghost:hover {
  border-color: var(--color-text);
  background: color-mix(in oklab, var(--color-text) 6%, transparent);
}

.btn--block { width: 100%; justify-content: center; }
.btn[disabled] { opacity: 0.6; cursor: not-allowed; }

/* ============ header ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in oklab, var(--color-bg) 86%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-divider);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: var(--space-4);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: inherit;
  text-decoration: none;
}

.brand img { height: 22px; width: auto; }

.brand__meta {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
  border-left: 1px solid var(--color-border);
  padding-left: var(--space-3);
}

.brand__meta span:first-child {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.brand__meta span:last-child {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.header-actions { display: flex; align-items: center; gap: var(--space-3); }

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px; height: 40px;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
}
.theme-toggle:hover { background: color-mix(in oklab, var(--color-text) 8%, transparent); color: var(--color-text); }

/* ============ hero ============ */
.hero {
  position: relative;
  background: linear-gradient(135deg, #0f2b20 0%, #1f4d3a 48%, #4a3c1f 100%);
  overflow: hidden;
  isolation: isolate;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
  align-items: center;
  padding-block: clamp(var(--space-12), 10vw, var(--space-20));
}

@media (min-width: 860px) {
  .hero__grid { grid-template-columns: 1.05fr 0.95fr; gap: var(--space-14); }
}

.hero__content { max-width: 46rem; color: #f2efe4; }

.hero__painting {
  width: 100%;
}
.hero__painting img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-lg);
  box-shadow: 0 24px 70px color-mix(in oklab, black 45%, transparent);
}
.hero__painting-caption { margin-top: var(--space-4); }
.hero__painting-caption .tag {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-gold);
}
.hero__painting-caption p {
  font-size: var(--text-sm);
  margin-top: var(--space-1);
  color: #f2efe4;
  letter-spacing: 0.01em;
}
.hero__painting-spec {
  font-size: 0.78rem;
  margin-top: var(--space-2);
  color: color-mix(in oklab, #f2efe4 68%, transparent);
  letter-spacing: 0.01em;
}

.hero .eyebrow { color: #e2c37f; }

.hero h1 {
  font-family: var(--font-display);
  font-weight: 700;
  text-transform: uppercase;
  font-size: var(--text-3xl);
  line-height: 1.04;
  letter-spacing: -0.015em;
  margin-top: var(--space-4);
}

.hero__lede {
  font-size: var(--text-base);
  color: #d6d2c1;
  max-width: 42ch;
  margin-top: var(--space-5);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-top: var(--space-8);
}

/* Hero always sits on a dark photographic background regardless of site theme,
   so its ghost button must stay light-on-dark instead of inheriting --color-text. */
.hero .btn--ghost {
  color: #f2efe4;
  border-color: color-mix(in oklab, #f2efe4 35%, transparent);
  background: color-mix(in oklab, black 30%, transparent);
  backdrop-filter: blur(6px);
}
.hero .btn--ghost:hover {
  border-color: #f2efe4;
  background: color-mix(in oklab, black 45%, transparent);
}

/* ============ backdrop-link section ============ */
.link-section {
  background: var(--color-surface-2);
  border-top: 1px solid var(--color-divider);
  border-bottom: 1px solid var(--color-divider);
}

.link-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  margin-top: var(--space-12);
  align-items: stretch;
}

.link-grid--single {
  grid-template-columns: 1fr;
  max-width: 26rem;
}

.link-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4 / 5;
  background: var(--color-surface-offset);
}

.link-card img { width: 100%; height: 100%; object-fit: cover; }

.link-card__label {
  position: absolute;
  left: var(--space-5); bottom: var(--space-5); right: var(--space-5);
  color: #f2efe4;
  z-index: 2;
}
.link-card::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 55%, color-mix(in oklab, black 82%, transparent) 100%);
}
.link-card__label { position: absolute; z-index: 2; }

.link-card__label .tag {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-gold);
}
.link-card__label p {
  font-size: var(--text-base);
  margin-top: var(--space-1);
  color: #f2efe4;
  max-width: 24ch;
}
.link-card__label .link-card__spec {
  font-size: var(--text-xs);
  margin-top: var(--space-2);
  color: color-mix(in oklab, #f2efe4 72%, transparent);
  max-width: 30ch;
}

.link-arrow {
  display: none;
  align-items: center;
  justify-content: center;
  width: 52px; height: 52px;
  border-radius: 50%;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  align-self: center;
  color: var(--color-text);
}

@media (min-width: 860px) {
  .link-grid { grid-template-columns: 1fr auto 1fr; align-items: center; }
  .link-arrow { display: flex; }
  .link-grid--single { grid-template-columns: 1fr; }
}

/* ============ artist section ============ */
.artist-section .wrap { display: grid; gap: clamp(var(--space-10), 6vw, var(--space-16)); }

@media (min-width: 860px) {
  .artist-section .wrap { grid-template-columns: 0.85fr 1.15fr; align-items: center; }
}

.artist-media { display: flex; flex-direction: column; gap: var(--space-4); }
.artist-media img {
  width: 100%;
  display: block;
  border-radius: var(--radius-lg);
  box-shadow: 0 16px 40px color-mix(in oklab, black 25%, transparent);
}

.artist-copy p {
  margin-top: var(--space-5);
  color: var(--color-text-muted);
  font-size: var(--text-base);
}

.artist-copy blockquote {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-lg);
  font-style: normal;
  color: var(--color-text);
  border-left: none;
  padding: 0;
  margin-top: var(--space-6);
  text-transform: none;
  max-width: 38ch;
}

.artist-copy cite {
  display: block;
  font-family: var(--font-body);
  font-style: normal;
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin-top: var(--space-3);
}

/* ============ provenance section ============ */
.provenance-section { background: var(--color-primary); color: #eef4ef; }
.provenance-section .eyebrow { color: #cfe6d7; }
.provenance-section .eyebrow::before { background: #cfe6d7; }
.provenance-section .lede { color: color-mix(in oklab, #eef4ef 78%, transparent); max-width: 70ch; font-size: var(--text-base); }
.provenance-section h2.section-title { font-size: var(--text-lg); max-width: 28ch; }
.provenance-section h2 { color: #f5f9f5; }

.stat-grid {
  display: grid;
  gap: var(--space-6);
  margin-top: var(--space-12);
  grid-template-columns: 1fr;
}

@media (min-width: 760px) {
  .stat-grid { grid-template-columns: repeat(3, 1fr); }
}

.stat-card {
  padding: var(--space-8);
  border-radius: var(--radius-lg);
  background: color-mix(in oklab, #eef4ef 8%, transparent);
  border: 1px solid color-mix(in oklab, #eef4ef 16%, transparent);
}

.stat-card .stat-num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-2xl);
  letter-spacing: -0.01em;
  color: #f7dfa3;
}

.stat-card .stat-label {
  margin-top: var(--space-2);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: color-mix(in oklab, #eef4ef 70%, transparent);
}

.stat-card p {
  margin-top: var(--space-4);
  font-size: var(--text-sm);
  color: color-mix(in oklab, #eef4ef 88%, transparent);
}

/* ============ cause section ============ */
.cause-section .wrap { max-width: var(--content-default); text-align: left; }
.cause-section blockquote {
  font-family: var(--font-display);
  font-weight: 700;
  text-transform: uppercase;
  font-size: var(--text-xl);
  line-height: 1.2;
  margin-top: var(--space-8);
  max-width: 30ch;
}
.cause-section .lede { max-width: 60ch; }
.cause-section .fine-print {
  margin-top: var(--space-8);
  font-size: var(--text-xs);
  color: color-mix(in oklab, #eef4ef 62%, transparent);
  max-width: 60ch;
}

/* ============ bid section ============ */
.bid-section { background: var(--color-surface-2); border-top: 1px solid var(--color-divider); }
.bid-section .wrap { display: grid; gap: clamp(var(--space-10), 6vw, var(--space-16)); }

@media (min-width: 900px) {
  .bid-section .wrap { grid-template-columns: 0.9fr 1.1fr; align-items: start; }
}

.bid-info .lede { color: var(--color-text-muted); }

.bid-info__list { margin-top: var(--space-8); display: flex; flex-direction: column; gap: var(--space-5); }
.bid-info__item { display: flex; gap: var(--space-4); align-items: flex-start; }
.bid-info__num {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-gold);
  font-size: var(--text-sm);
  min-width: 1.6rem;
}
.bid-info__item p { font-size: var(--text-sm); color: var(--color-text-muted); }
.bid-info__item strong { color: var(--color-text); display: block; margin-bottom: var(--space-1); font-size: var(--text-base); }

.bid-form {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: clamp(var(--space-8), 4vw, var(--space-10));
  box-shadow: var(--shadow-md);
}

.current-bid-note {
  margin-top: var(--space-5);
  text-align: center;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}
.current-bid-note strong { color: var(--color-gold); font-weight: 700; }

.field { margin-bottom: var(--space-5); }
.field label {
  display: block;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

.field input, .field textarea {
  width: 100%;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  color: var(--color-text);
  min-height: 48px;
}
.field textarea { min-height: 96px; resize: vertical; }
.field input:focus, .field textarea:focus { border-color: var(--color-primary); }
.field input[aria-invalid='true'], .field textarea[aria-invalid='true'] { border-color: var(--color-error); }

.field-row { display: grid; gap: var(--space-5); grid-template-columns: 1fr; }
@media (min-width: 520px) { .field-row { grid-template-columns: 1fr 1fr; } }

.field-error {
  font-size: var(--text-xs);
  color: var(--color-error);
  margin-top: var(--space-1);
  display: none;
}
.field-error.show { display: block; }

.form-note {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-4);
  text-align: center;
}

.form-status {
  margin-top: var(--space-5);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  display: none;
}
.form-status.show { display: block; }
.form-status--success { background: var(--color-success-highlight); color: var(--color-success); }
.form-status--error { background: var(--color-error-highlight); color: var(--color-error); }

.success-state { display: none; text-align: center; padding-block: var(--space-6); }
.success-state.show { display: block; }
.success-state svg { margin-inline: auto; color: var(--color-primary); }
.success-state h3 {
  font-family: var(--font-display);
  font-weight: 700;
  text-transform: uppercase;
  font-size: var(--text-lg);
  margin-top: var(--space-4);
}
.success-state p { color: var(--color-text-muted); margin-top: var(--space-2); font-size: var(--text-sm); }

/* ============ footer ============ */
.site-footer {
  background: #0b0c09;
  color: #cfcbb9;
  padding-block: var(--space-12);
}
.site-footer .wrap {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}
.site-footer__top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid #262719;
}
.site-footer img { height: 20px; }
.site-footer__meta { font-size: var(--text-xs); color: #8f8c78; text-align: right; }
.site-footer__bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
  font-size: var(--text-xs);
  color: #6f6c5b;
}
.site-footer a { color: #cfcbb9; text-decoration: none; }
.site-footer a:hover { color: #f2efe4; }

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

/* ============ utility ============ */
.skip-link {
  position: absolute; left: -999px; top: 0;
  background: var(--color-gold); color: #171509;
  padding: var(--space-2) var(--space-4); z-index: 100;
}
.skip-link:focus { left: var(--space-4); top: var(--space-4); }

@media (max-width: 859px) {
  .link-grid { grid-template-columns: 1fr; }
  .brand__meta { display: none; }
}