/* ============================================================
   KWG — site.css
   Design tokens + components. Built from the brand brief and the
   identity-refinement handoff.

   Hard rules encoded here:
   · Midnight is the dominant ground; the site reads dark, like a
     gallery hung at night.
   · GOLD IS LINE AND RULE ONLY — never a fill, never a gradient,
     never body text. It appears as hairlines, borders and small
     tracked labels at large-enough sizes to pass contrast.
   · Reading text on dark grounds is Rice Paper (#F2EADA).
   · Generous negative space. Work images sit small with wide margins.
   · The lotus is the only ornament.
   ============================================================ */

/* ---- Design tokens ---- */
:root {
  /* Brand palette (do not hardcode these hex values in markup) */
  --midnight:    #0A1730;
  --prussian:    #0F2350;
  --gold:        #C9A227;
  --gold-light:  #D9BC63;
  --burnished:   #8C6A2F;
  --paper:       #F2EADA;
  --slate:       #6C7590;

  /* Semantic — dark ground (default) */
  --bg:          var(--midnight);
  --bg-panel:    #0c1c3c;          /* a hair lifted from midnight for panels */
  --ink:         var(--paper);      /* body text on dark: AA ~14:1 */
  --ink-strong:  #FBF7EE;
  --ink-mute:    #C7CEDF;           /* muted text on dark: AA */
  --ink-faint:   #9AA6C0;           /* captions on dark */
  --rule:        rgba(201, 162, 39, 0.32); /* gold hairline */
  --rule-soft:   rgba(201, 162, 39, 0.18);
  --rule-cool:   rgba(199, 206, 223, 0.16);

  /* Semantic — paper inset */
  --paper-ink:      #201f1d;
  --paper-ink-mute: #3a3833;
  --paper-rule:     rgba(32, 31, 29, 0.16);
  --paper-kicker:   #7a5d28;        /* burnished, darkened for AA on paper */

  /* Type */
  --font-display: 'Cormorant Garamond', Georgia, 'Times New Roman', serif;
  --font-body:    'Lora', Georgia, serif;
  --font-ui:      'Jost', system-ui, -apple-system, Segoe UI, sans-serif;
  --font-thai:    'Noto Sans Thai', var(--font-body);

  /* Type scale (fluid) */
  --step--1: clamp(0.82rem, 0.80rem + 0.10vw, 0.90rem);
  --step-0:  clamp(0.98rem, 0.95rem + 0.15vw, 1.06rem);
  --step-1:  clamp(1.30rem, 1.20rem + 0.50vw, 1.60rem);
  --step-2:  clamp(1.70rem, 1.45rem + 1.10vw, 2.30rem);
  --step-3:  clamp(2.20rem, 1.70rem + 2.20vw, 3.40rem);
  --step-4:  clamp(2.80rem, 2.00rem + 3.60vw, 4.80rem);

  /* Spacing */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;
  --space-6: 6rem;
  --space-7: 9rem;

  --measure: 40rem;                 /* reading width */
  --container: 70rem;               /* ~1120px */
  --container-wide: 80rem;

  --track-wide: 0.24em;
  --track-mark: 0.16em;

  --focus: 2px solid var(--gold-light);
}

/* ---- Reset / base ---- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
body:lang(th), :lang(th) { font-family: var(--font-thai); line-height: 1.9; }

img, svg { max-width: 100%; height: auto; display: block; }
h1, h2, h3, h4 { font-weight: 400; margin: 0; }
p { margin: 0 0 1.2em; text-wrap: pretty; }
p:last-child { margin-bottom: 0; }

a { color: var(--gold-light); text-decoration: none; border-bottom: 1px solid var(--rule); }
a:hover { color: var(--ink-strong); border-bottom-color: var(--gold-light); }

/* Visible keyboard focus everywhere (WCAG AA). */
:focus-visible { outline: var(--focus); outline-offset: 3px; }
:focus:not(:focus-visible) { outline: none; }

/* Skip link */
.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--paper); color: var(--paper-ink);
  padding: 0.75rem 1.25rem; font-family: var(--font-ui);
  letter-spacing: 0.12em; text-transform: uppercase; font-size: var(--step--1);
}
.skip-link:focus { left: 1rem; top: 1rem; }

/* ---- Layout ---- */
.container { max-width: var(--container); margin-inline: auto; padding-inline: clamp(1.25rem, 5vw, 3rem); }
.container-wide { max-width: var(--container-wide); margin-inline: auto; padding-inline: clamp(1.25rem, 5vw, 3rem); }
.section { padding-block: var(--space-6); }
.section-tight { padding-block: var(--space-5); }
.measure { max-width: var(--measure); }
.center { margin-inline: auto; }
.stack > * + * { margin-top: var(--space-3); }
.stack-lg > * + * { margin-top: var(--space-4); }

/* Paper inset section (for long reading passages / documents) */
.on-paper {
  background: var(--paper);
  color: var(--paper-ink);
}
.on-paper a { color: var(--burnished); border-bottom-color: var(--paper-rule); }
.on-paper a:hover { color: var(--prussian); }

/* ---- Typography helpers ---- */
.kicker {
  font-family: var(--font-ui);
  font-size: var(--step--1);
  letter-spacing: var(--track-wide);
  text-transform: uppercase;
  color: var(--gold-light);
  margin: 0;
}
.on-paper .kicker { color: var(--paper-kicker); }
.display {
  font-family: var(--font-display);
  font-weight: 300;
  line-height: 1.04;
  letter-spacing: 0.01em;
}
.display-1 { font-size: var(--step-4); }
.display-2 { font-size: var(--step-3); }
.display-3 { font-size: var(--step-2); }
.lede { font-size: var(--step-1); line-height: 1.5; color: var(--ink-strong); font-family: var(--font-display); font-weight: 300; }
.on-paper .lede { color: var(--paper-ink); }
.muted { color: var(--ink-mute); }
.faint { color: var(--ink-faint); }
.on-paper .muted, .on-paper .faint { color: var(--paper-ink-mute); }
.small { font-size: var(--step--1); }
.ui { font-family: var(--font-ui); }
.tabular { font-variant-numeric: tabular-nums; }
.thai { font-family: var(--font-thai); }

/* A gold hairline used as a divider — the primary decorative device. */
.rule { border: 0; border-top: 1px solid var(--rule); margin: 0; }
.rule-short { width: 2rem; height: 1px; background: var(--gold); border: 0; margin: var(--space-3) 0; }
.rule-short.center { margin-inline: auto; }

/* ---- Header / masthead ---- */
.masthead {
  position: sticky; top: 0; z-index: 40;
  background: color-mix(in srgb, var(--midnight) 92%, transparent);
  backdrop-filter: saturate(140%) blur(6px);
  border-bottom: 1px solid var(--rule-soft);
}
.masthead__inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--space-3); min-height: 68px;
}
.brand-lockup { display: inline-flex; align-items: center; gap: 0.8rem; border: 0; }
.brand-lockup:hover { border: 0; }
.brand-lockup .mark { width: 30px; height: 30px; color: var(--gold); flex: none; }
.brand-lockup .bar { width: 1px; height: 26px; background: var(--rule); }
.brand-lockup .wordmark {
  font-family: var(--font-display); font-size: 1.45rem; letter-spacing: 0.18em;
  text-indent: 0.18em; color: var(--ink-strong); line-height: 1;
}
.brand-lockup .sub {
  display: block; font-family: var(--font-ui); font-size: 0.62rem; letter-spacing: 0.26em;
  text-transform: uppercase; color: var(--ink-faint); margin-top: 4px; white-space: nowrap;
}
@media (max-width: 460px) { .brand-lockup .sub { display: none; } }

.nav { display: flex; align-items: center; gap: clamp(0.8rem, 2vw, 1.8rem); }
.nav a {
  font-family: var(--font-ui); font-size: var(--step--1);
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-mute);
  border: 0; padding: 0.4rem 0; white-space: nowrap;
}
.nav a:hover, .nav a[aria-current="page"] { color: var(--gold-light); }
.nav a[aria-current="page"] { border-bottom: 1px solid var(--gold); }

.lang-switch a { color: var(--ink-faint); }
.lang-switch a:hover { color: var(--gold-light); }

/* Mobile nav toggle */
.nav-toggle {
  display: none; background: none; border: 1px solid var(--rule);
  color: var(--ink); font-family: var(--font-ui); text-transform: uppercase;
  letter-spacing: 0.14em; font-size: var(--step--1); padding: 0.5rem 0.9rem; cursor: pointer;
}
@media (max-width: 720px) {
  .nav-toggle { display: inline-block; }
  .nav {
    display: none; position: absolute; left: 0; right: 0; top: 100%;
    flex-direction: column; align-items: flex-start; gap: 0;
    background: var(--midnight); border-bottom: 1px solid var(--rule-soft);
    padding: 0.5rem clamp(1.25rem, 5vw, 3rem) 1.5rem;
  }
  .nav.is-open { display: flex; }
  .nav a { width: 100%; padding: 0.85rem 0; border-bottom: 1px solid var(--rule-cool); }
  .masthead__inner { position: relative; }
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex; align-items: center; gap: 0.6rem;
  font-family: var(--font-ui); font-size: var(--step--1);
  letter-spacing: 0.16em; text-transform: uppercase;
  padding: 0.85rem 1.6rem; cursor: pointer; border: 1px solid var(--gold);
  color: var(--gold-light); background: transparent; border-radius: 0;
  transition: color .2s, background-color .2s, border-color .2s;
}
.btn:hover { color: var(--midnight); background: var(--gold-light); border-color: var(--gold-light); }
.btn--solid { background: var(--gold-light); color: var(--midnight); }
.btn--solid:hover { background: var(--gold); }
.btn--ghost { border-color: var(--rule); color: var(--ink); }
.btn--ghost:hover { background: transparent; color: var(--gold-light); border-color: var(--gold-light); }
.on-paper .btn { color: var(--burnished); border-color: var(--burnished); }
.on-paper .btn:hover { color: var(--paper); background: var(--burnished); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-row { display: flex; flex-wrap: wrap; gap: var(--space-2); align-items: center; }

.link-arrow {
  font-family: var(--font-ui); letter-spacing: 0.14em; text-transform: uppercase;
  font-size: var(--step--1); border: 0;
}
.link-arrow::after { content: " →"; }

/* ---- Hero ---- */
.hero { padding-block: clamp(3.5rem, 12vh, 8rem); position: relative; }
.hero__mark { width: clamp(64px, 12vw, 104px); height: clamp(64px, 12vw, 104px); color: var(--gold); margin-bottom: var(--space-4); }
.hero__lede { max-width: 22ch; }
.hero__sub { max-width: 46ch; color: var(--ink-mute); }

/* ---- Figures / work images (gallery hang) ---- */
.plate {
  background: var(--bg-panel);
  border: 1px solid var(--rule-soft);
  padding: clamp(2rem, 6vw, 4.5rem);
  display: grid; place-items: center;
}
.plate img { box-shadow: 0 2px 40px rgba(0,0,0,0.35); }
figure { margin: 0; }
figcaption {
  font-family: var(--font-ui); font-size: var(--step--1);
  letter-spacing: var(--track-mark); text-transform: uppercase;
  color: var(--ink-faint); margin-top: var(--space-2);
}

/* ---- Catalogue grid: sparse, wide margins (NOT an e-commerce grid) ---- */
.catalogue {
  display: grid; gap: clamp(2.5rem, 6vw, 5rem) clamp(2rem, 5vw, 4rem);
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 20rem), 1fr));
}
.work-card { border: 0; color: inherit; display: block; }
.work-card:hover { border: 0; }
.work-card__plate {
  aspect-ratio: 4 / 5; background: var(--bg-panel);
  border: 1px solid var(--rule-soft);
  display: grid; place-items: center; overflow: hidden;
  padding: clamp(1.5rem, 4vw, 3rem); transition: border-color .25s;
}
.work-card:hover .work-card__plate { border-color: var(--rule); }
.work-card__plate img { object-fit: contain; max-height: 100%; }
.work-card__meta { margin-top: var(--space-2); }
.work-card__title { font-family: var(--font-display); font-size: var(--step-1); color: var(--ink-strong); line-height: 1.15; }
.work-card__artist { color: var(--ink-mute); }
.work-card__price { font-family: var(--font-ui); font-size: var(--step--1); letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-faint); margin-top: 0.3rem; }
.placeholder-plate {
  color: var(--ink-faint); font-family: var(--font-ui); text-align: center;
  letter-spacing: 0.16em; text-transform: uppercase; font-size: var(--step--1); line-height: 2;
}

/* Badge for tier / status */
.badge {
  display: inline-block; font-family: var(--font-ui); font-size: 0.68rem;
  letter-spacing: 0.18em; text-transform: uppercase; color: var(--gold-light);
  border: 1px solid var(--rule); padding: 0.25rem 0.6rem;
}
.badge--muted { color: var(--ink-faint); border-color: var(--rule-cool); }

/* ---- Detail layout ---- */
.detail { display: grid; gap: clamp(2rem, 5vw, 4rem); grid-template-columns: 1.15fr 1fr; align-items: start; }
@media (max-width: 820px) { .detail { grid-template-columns: 1fr; } }
.spec { display: grid; grid-template-columns: auto 1fr; gap: 0.5rem 1.5rem; font-size: var(--step-0); }
.spec dt { font-family: var(--font-ui); font-size: var(--step--1); letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-faint); }
.spec dd { margin: 0; color: var(--ink); }

/* ---- Cards / panels ---- */
.panel { border: 1px solid var(--rule-soft); padding: clamp(1.5rem, 4vw, 2.5rem); }
.panel--paper { background: var(--paper); color: var(--paper-ink); border-color: var(--paper-rule); }
.grid-3 { display: grid; gap: clamp(1.5rem, 4vw, 3rem); grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr)); }
.grid-2 { display: grid; gap: clamp(1.5rem, 4vw, 3rem); grid-template-columns: repeat(auto-fit, minmax(min(100%, 22rem), 1fr)); }

/* ---- Forms ---- */
.field { margin-bottom: var(--space-3); }
.field label { display: block; font-family: var(--font-ui); font-size: var(--step--1); letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-mute); margin-bottom: 0.5rem; }
.on-paper .field label { color: var(--paper-ink-mute); }
.field .hint { font-size: var(--step--1); color: var(--ink-faint); margin-top: 0.35rem; }
.field .req { color: var(--gold-light); }
input[type=text], input[type=email], input[type=password], input[type=tel], input[type=search], select, textarea {
  width: 100%; font-family: var(--font-body); font-size: var(--step-0);
  color: var(--ink); background: var(--bg-panel);
  border: 1px solid var(--rule-cool); padding: 0.8rem 0.9rem; border-radius: 0;
}
.on-paper input, .on-paper select, .on-paper textarea { color: var(--paper-ink); background: #fff; border-color: var(--paper-rule); }
input:focus, select:focus, textarea:focus { border-color: var(--gold-light); outline: var(--focus); outline-offset: 1px; }
textarea { min-height: 8rem; resize: vertical; }
select {
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--gold-light) 50%), linear-gradient(135deg, var(--gold-light) 50%, transparent 50%);
  background-position: right 1.1rem center, right 0.85rem center;
  background-size: 6px 6px, 6px 6px; background-repeat: no-repeat; padding-right: 2.2rem;
}
.checkbox { display: flex; gap: 0.75rem; align-items: flex-start; font-size: var(--step-0); }
.checkbox input { width: auto; margin-top: 0.35rem; accent-color: var(--gold); }
.form-narrow { max-width: 34rem; }

.field-error { color: #E7B7B0; font-size: var(--step--1); margin-top: 0.35rem; font-family: var(--font-ui); }
.on-paper .field-error { color: #9d3b2f; }
input[aria-invalid=true], textarea[aria-invalid=true], select[aria-invalid=true] { border-color: #b4544a; }

/* ---- Flash / alerts ---- */
.alert { border: 1px solid var(--rule); padding: 1rem 1.25rem; margin-bottom: var(--space-3); font-size: var(--step-0); }
.alert--success { border-color: rgba(201,162,39,0.5); }
.alert--error { border-color: #b4544a; color: #E7B7B0; }
.alert--info { border-color: var(--rule-cool); color: var(--ink-mute); }

/* ---- Status banner (PENDING review) ---- */
.status-banner { border-left: 3px solid var(--gold); background: var(--prussian); padding: 1.25rem 1.5rem; }

/* ---- Footer ---- */
.site-footer { border-top: 1px solid var(--rule-soft); padding-block: var(--space-5); margin-top: var(--space-6); }
.site-footer .cols { display: flex; flex-wrap: wrap; gap: var(--space-4); justify-content: space-between; align-items: flex-start; }
.site-footer .legal-links { display: flex; gap: var(--space-3); flex-wrap: wrap; }
.site-footer a { color: var(--ink-faint); border: 0; font-family: var(--font-ui); font-size: var(--step--1); letter-spacing: 0.12em; text-transform: uppercase; }
.site-footer a:hover { color: var(--gold-light); }
.site-footer .fine { color: var(--ink-faint); font-size: var(--step--1); }

/* ---- Cookie banner ---- */
.cookie-banner {
  position: fixed; inset: auto 1rem 1rem 1rem; z-index: 60; max-width: 34rem;
  margin-inline: auto; background: var(--prussian); border: 1px solid var(--rule);
  padding: 1.25rem 1.5rem; box-shadow: 0 8px 40px rgba(0,0,0,0.5);
}
.cookie-banner p { font-size: var(--step--1); color: var(--ink-mute); }
.cookie-banner .btn-row { margin-top: var(--space-2); }
.cookie-banner[hidden] { display: none; }

/* ---- Utilities ---- */
.visually-hidden {
  position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.text-center { text-align: center; }
.mt-0 { margin-top: 0; } .mb-0 { margin-bottom: 0; }
.flow > * + * { margin-top: 1.2em; }

/* ---- Lotus draw-in (one motion moment, first load only) ---- */
.lotus-draw path, .lotus-draw circle { stroke-dasharray: var(--len, 400); stroke-dashoffset: var(--len, 400); }
.lotus-draw.is-drawing path, .lotus-draw.is-drawing circle {
  animation: lotus-draw 2.2s ease forwards;
}
.lotus-draw.is-drawing :nth-child(2) { animation-delay: .05s; }
.lotus-draw.is-drawing :nth-child(3) { animation-delay: .10s; }
.lotus-draw.is-drawing :nth-child(4) { animation-delay: .15s; }
.lotus-draw.is-drawn path, .lotus-draw.is-drawn circle { stroke-dashoffset: 0; }
@keyframes lotus-draw { to { stroke-dashoffset: 0; } }
@media (prefers-reduced-motion: reduce) {
  .lotus-draw path, .lotus-draw circle { stroke-dashoffset: 0 !important; animation: none !important; }
}