/* Hallmark · macrostructure: Portfolio Grid (home) + Photographic (project) · tone: calm-premium · anchor hue: 265 blue
 * genre: modern-minimal · theme: custom (tuned) · design-system: design.md · designed-as-app
 * nav: N5 Floating pill (width=page content ~1152px, backdrop=blur, anchor=top-centred; logo/links/actions split)
 * hero: H2 Split diptych (ratio=5/7, right=photo, divider=negative space) · stats: T4 (3-up, body large)
 * works: F6 Product card grid (ratio=4/3, 3-up, action="ดูผลงาน →") · steps: F4 (01/02, horizontal flow, connector none)
 * footer: Ft1 Mast-headed (wordmark xl, tagline roman, links inline)
 * Hallmark · pre-emit critique: P4 H4 E4 S4 R5 V4
 * Thai text: no letter-spacing, display line-height >= 1.25. Tokens live in tokens.css.
 */

* { box-sizing: border-box; }
html, body { overflow-x: clip; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 6rem; }
body {
  margin: 0;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-md);
  line-height: 1.7;
}
img { max-width: 100%; height: auto; display: block; }
picture { display: contents; }
a { color: inherit; }
h1, h2, h3 { font-family: var(--font-display); font-style: normal; font-weight: 700; line-height: 1.28; margin: 0; overflow-wrap: anywhere; min-width: 0; }
p { margin: 0; }
:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 3px; border-radius: 6px; }

.wrap { max-width: var(--wrap); margin-inline: auto; padding-inline: var(--gutter); }
.skip { position: absolute; left: var(--space-sm); top: -4rem; z-index: 30; background: var(--color-accent); color: var(--color-accent-ink); padding: var(--space-2xs) var(--space-sm); border-radius: var(--radius-pill); text-decoration: none; }
.skip:focus { top: var(--space-sm); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2xs);
  min-height: 44px; padding-inline: var(--space-md);
  border-radius: var(--radius-pill); border: 1px solid transparent;
  font: inherit; font-weight: 600; font-size: var(--text-sm); line-height: 1; white-space: nowrap;
  text-decoration: none; cursor: pointer;
  transition: background-color var(--dur-short) var(--ease-out), color var(--dur-short) var(--ease-out),
              border-color var(--dur-short) var(--ease-out), transform var(--dur-short) var(--ease-out);
}
.btn svg { width: 18px; height: 18px; flex: none; }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--color-accent); color: var(--color-accent-ink); }
.btn-primary:hover { background: var(--color-accent-hover); }
.btn-ghost { background: var(--color-paper); color: var(--color-ink); border-color: var(--color-rule); }
.btn-ghost:hover { border-color: var(--color-accent); color: var(--color-accent); }
.btn-lg { min-height: 52px; padding-inline: var(--space-lg); font-size: var(--text-md); }
.btn-sm { min-height: 40px; padding-inline: var(--space-sm); }

/* ---------- N5 floating pill nav ---------- */
.site-header { position: sticky; top: var(--space-xs); z-index: 20; display: flex; justify-content: center; padding-inline: var(--gutter); margin-top: var(--space-xs); }
.pill {
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-md);
  width: 100%; max-width: calc(var(--wrap) - 2 * var(--gutter));
  padding: var(--space-3xs) var(--space-3xs) var(--space-3xs) var(--space-xs);
  background: var(--color-glass); backdrop-filter: blur(14px) saturate(1.4); -webkit-backdrop-filter: blur(14px) saturate(1.4);
  border: 1px solid var(--color-rule); border-radius: var(--radius-pill); box-shadow: var(--shadow-pill);
}
.logo { display: inline-flex; align-items: center; gap: var(--space-2xs); min-height: 44px; text-decoration: none; color: var(--color-ink); min-width: 0; }
.logo-mark { display: block; width: 36px; height: 36px; flex: none; color: var(--color-accent); }
.logo-mark svg { width: 100%; height: 100%; display: block; }
.logo-text { display: flex; flex-direction: column; min-width: 0; }
.logo-text strong { font-weight: 700; font-size: var(--text-sm); line-height: 1.25; white-space: nowrap; }
.logo-text small { font-size: var(--text-xs); color: var(--color-ink-2); line-height: 1.3; white-space: nowrap; }
.nav { display: flex; gap: var(--space-3xs); margin-inline: auto; }
.nav a { padding: var(--space-2xs) var(--space-sm); border-radius: var(--radius-pill); color: var(--color-ink-2); text-decoration: none; font-weight: 500; font-size: var(--text-sm); white-space: nowrap; transition: background-color var(--dur-short) var(--ease-out), color var(--dur-short) var(--ease-out); }
.nav a:hover { background: var(--color-paper-3); color: var(--color-ink); }
.pill-actions { display: flex; align-items: center; gap: var(--space-3xs); }
.theme-toggle { display: inline-grid; place-items: center; width: 40px; height: 40px; border: 0; border-radius: var(--radius-pill); background: transparent; color: var(--color-ink-2); cursor: pointer; padding: 0; transition: background-color var(--dur-short) var(--ease-out), color var(--dur-short) var(--ease-out); }
.theme-toggle:hover { background: var(--color-paper-3); color: var(--color-ink); }
.theme-toggle svg { width: 18px; height: 18px; }
.theme-toggle .sun { display: none; }
:root[data-theme="dark"] .theme-toggle .sun { display: block; }
:root[data-theme="dark"] .theme-toggle .moon { display: none; }

/* ---------- H2 split diptych hero ---------- */
.hero { padding-block: var(--space-2xl) var(--space-xl); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 6fr) minmax(0, 6fr); gap: var(--space-2xl); align-items: center; }
.hero h1 { font-size: var(--text-display); line-height: 1.25; text-wrap: balance; }
.section-head h2 { text-wrap: balance; }
.hero .lede { margin-top: var(--space-md); color: var(--color-ink-2); font-size: var(--text-lg); max-width: 34em; }
.hero .lede p + p { margin-top: var(--space-xs); }
.hero-cta { display: flex; flex-wrap: wrap; gap: var(--space-xs); margin-top: var(--space-lg); }
.services { list-style: none; padding: 0; margin: var(--space-lg) 0 0; display: flex; flex-wrap: wrap; gap: var(--space-2xs); }
.services li { font-size: var(--text-xs); font-weight: 500; color: var(--color-ink-2); border: 1px solid var(--color-rule); border-radius: var(--radius-pill); padding: var(--space-3xs) var(--space-xs); }
.hero-media { position: relative; display: block; aspect-ratio: 4 / 3; border-radius: var(--radius-card); overflow: hidden; background: var(--color-paper-3); text-decoration: none; }
.hero-media img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--dur-long) var(--ease-out); }
.hero-media:hover img { transform: scale(1.02); }
.hero-tag { position: absolute; left: var(--space-sm); bottom: var(--space-sm); max-width: calc(100% - 2 * var(--space-sm)); background: var(--color-paper); color: var(--color-ink); border-radius: 12px; padding: var(--space-2xs) var(--space-sm); font-weight: 600; font-size: var(--text-sm); line-height: 1.45; box-shadow: var(--shadow-pill); }
.hero-tag small { display: block; color: var(--color-accent); font-size: var(--text-xs); font-weight: 600; }

/* ---------- T4 stat strip ---------- */
.stats { list-style: none; padding: var(--space-md) 0 0; margin: var(--space-2xl) 0 0; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) minmax(0, 2fr); gap: var(--space-md); border-top: 1px solid var(--color-rule); }
.stats strong { display: block; font-size: var(--text-xl); font-weight: 700; line-height: 1.3; font-variant-numeric: tabular-nums; }
.stats span { color: var(--color-ink-2); font-size: var(--text-sm); }

/* ---------- sections ---------- */
.section { padding-block: var(--space-2xl); }
.section-head h2 { font-size: var(--text-2xl); }
.section-head p { margin-top: var(--space-2xs); color: var(--color-ink-2); max-width: 40em; }
.count { display: inline-block; vertical-align: middle; margin-left: var(--space-2xs); padding: 0 var(--space-xs); border-radius: var(--radius-pill); background: var(--color-accent-soft); color: var(--color-accent); font-size: var(--text-sm); font-weight: 600; line-height: 1.9; font-variant-numeric: tabular-nums; }

/* ---------- F6 work cards ---------- */
.works { background: var(--color-paper-2); padding-block: var(--space-3xl) var(--space-2xl); }
.filters { display: flex; flex-wrap: wrap; gap: var(--space-2xs); margin-top: var(--space-lg); }
.chip { min-height: 44px; padding-inline: var(--space-sm); border-radius: var(--radius-pill); border: 1px solid var(--color-rule); background: var(--color-paper); color: var(--color-ink-2); font: inherit; font-size: var(--text-sm); font-weight: 500; white-space: nowrap; cursor: pointer; transition: background-color var(--dur-short) var(--ease-out), color var(--dur-short) var(--ease-out), border-color var(--dur-short) var(--ease-out); }
.chip span { font-variant-numeric: tabular-nums; opacity: .7; }
.chip:hover { border-color: var(--color-accent); color: var(--color-accent); }
.chip[aria-pressed="true"] { background: var(--color-ink); border-color: var(--color-ink); color: var(--color-paper); }
.grid { list-style: none; padding: 0; margin: var(--space-lg) 0 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--space-md); }
.card[hidden] { display: none; }
.card > a { display: flex; flex-direction: column; height: 100%; background: var(--color-paper); border: 1px solid var(--color-rule); border-radius: var(--radius-card); overflow: hidden; color: var(--color-ink); text-decoration: none; transition: box-shadow var(--dur-med) var(--ease-out), transform var(--dur-med) var(--ease-out), border-color var(--dur-med) var(--ease-out); }
.card > a:hover { box-shadow: var(--shadow-card); transform: translateY(-2px); border-color: transparent; }
.card-media { position: relative; display: block; aspect-ratio: 4 / 3; overflow: hidden; background: var(--color-paper-3); }
.card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--dur-long) var(--ease-out); }
.card > a:hover .card-media img { transform: scale(1.03); }
.badge { position: absolute; left: var(--space-xs); top: var(--space-xs); background: var(--color-accent); color: var(--color-accent-ink); font-size: var(--text-xs); font-weight: 600; padding: var(--space-3xs) var(--space-xs); border-radius: var(--radius-pill); line-height: 1.4; }
.card-body { display: flex; flex-direction: column; gap: var(--space-3xs); flex: 1; padding: var(--space-sm) var(--space-md) var(--space-md); }
.card-cat { color: var(--color-accent); font-size: var(--text-xs); font-weight: 600; }
.card-title { font-weight: 600; font-size: var(--text-lg); line-height: 1.45; }
.card-foot { display: flex; justify-content: space-between; align-items: center; gap: var(--space-xs); margin-top: auto; padding-top: var(--space-sm); color: var(--color-ink-2); font-size: var(--text-sm); }
.card-more { display: inline-flex; align-items: center; gap: var(--space-3xs); color: var(--color-accent); font-weight: 600; white-space: nowrap; }
.card-cta > a { background: var(--color-accent); border-color: var(--color-accent); color: var(--color-accent-ink); }
.card-cta > a:hover { background: var(--color-accent-hover); }
.card-cta .card-body { justify-content: flex-end; padding: var(--space-lg) var(--space-md); gap: var(--space-xs); }
.card-cta .card-title { font-size: var(--text-xl); line-height: 1.35; }
.card-text { font-size: var(--text-sm); opacity: .85; }
.card-cta .card-more { color: var(--color-accent-ink); margin-top: var(--space-2xs); }
.card-more svg { width: 16px; height: 16px; transition: transform var(--dur-short) var(--ease-out); }
.card > a:hover .card-more svg { transform: translateX(3px); }

/* ---------- F4 steps ---------- */
.how { padding-block: var(--space-3xl) var(--space-xl); }
.steps { list-style: none; padding: 0; margin: var(--space-lg) 0 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-lg) var(--space-md); }
.steps li { border-top: 2px solid var(--color-ink); padding-top: var(--space-sm); }
.step-no { display: block; color: var(--color-accent); font-weight: 700; font-size: var(--text-lg); font-variant-numeric: tabular-nums; }
.steps p { margin-top: var(--space-2xs); }
.note { margin-top: var(--space-xl); padding: var(--space-md) var(--space-lg); background: var(--color-accent-soft); border-radius: var(--radius-card); max-width: 52em; }
.note strong { color: var(--color-accent); }

/* ---------- contact band ---------- */
.contact { padding-block: var(--space-xl) var(--space-3xl); }
.contact-card { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: var(--space-xl); align-items: center; background: var(--color-inverse); color: var(--color-inverse-ink); border-radius: calc(var(--radius-card) + 8px); padding: var(--space-2xl) var(--space-xl); }
.contact-card h2 { font-size: var(--text-2xl); }
.contact-card p { margin-top: var(--space-2xs); color: var(--color-inverse-2); }
.contact-buttons { list-style: none; padding: 0; margin: 0; display: grid; gap: var(--space-xs); }
.contact-btn { display: flex; align-items: center; gap: var(--space-sm); min-height: 64px; padding: var(--space-2xs) var(--space-md) var(--space-2xs) var(--space-2xs); background: var(--color-paper); color: var(--color-ink); border-radius: var(--radius-pill); text-decoration: none; transition: transform var(--dur-short) var(--ease-out), box-shadow var(--dur-short) var(--ease-out); }
.contact-btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-pill); }
.contact-text { display: flex; flex-direction: column; min-width: 0; line-height: 1.35; }
.contact-text strong { font-weight: 700; white-space: nowrap; }
.contact-text small { color: var(--color-ink-2); font-size: var(--text-sm); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.icon { display: inline-grid; place-items: center; flex: none; width: 48px; height: 48px; border-radius: var(--radius-pill); color: var(--color-badge-ink); }
.icon svg { width: 24px; height: 24px; }
.icon-line { background: var(--color-line); }
.icon-line .glyph-cut { fill: var(--color-line); }
.icon-facebook { background: var(--color-facebook); }
.icon-phone { background: var(--color-phone); }
.icon-phone svg { width: 21px; height: 21px; }
.icon-email { background: var(--color-email); }

/* ---------- Ft1 mast-headed footer ---------- */
.site-footer { border-top: 1px solid var(--color-rule); padding-block: var(--space-xl) var(--space-md); }
.mast { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: flex-start; gap: var(--space-lg); }
.mast-brand p { margin-top: var(--space-xs); color: var(--color-ink-2); font-size: var(--text-sm); }
.mast-links { display: flex; flex-wrap: wrap; gap: var(--space-xs) var(--space-md); }
.mast-links a { display: inline-flex; align-items: center; gap: var(--space-2xs); min-height: 44px; color: var(--color-ink); text-decoration: none; font-weight: 500; font-size: var(--text-sm); white-space: nowrap; }
.mast-links a:hover { color: var(--color-accent); }
.mast-links .icon { width: 32px; height: 32px; }
.mast-links .icon svg { width: 17px; height: 17px; }
.mast-meta { display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--space-2xs) var(--space-md); margin-top: var(--space-lg); padding-top: var(--space-sm); border-top: 1px solid var(--color-rule); color: var(--color-ink-2); font-size: var(--text-xs); }

/* ---------- project page (Photographic) ---------- */
.project-hero { padding-block: var(--space-lg) 0; }
.crumbs { display: flex; align-items: center; gap: var(--space-2xs); font-size: var(--text-sm); color: var(--color-ink-2); min-width: 0; }
.crumbs a { color: var(--color-ink-2); text-decoration: none; white-space: nowrap; }
.crumbs a:hover { color: var(--color-accent); }
.crumbs [aria-current] { color: var(--color-ink); font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; min-width: 0; }
.project-head { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 4fr); gap: var(--space-2xl); align-items: end; margin-top: var(--space-lg); }
.project-cat { color: var(--color-accent); font-weight: 600; font-size: var(--text-sm); margin-bottom: var(--space-2xs); }
.project-head h1 { font-size: var(--text-title); }
.project-head .lede { margin-top: var(--space-sm); color: var(--color-ink-2); font-size: var(--text-lg); }
.facts { margin: 0; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); column-gap: var(--space-md); border-top: 1px solid var(--color-rule); }
.facts div { padding-block: var(--space-xs); border-bottom: 1px solid var(--color-rule); }
.facts dt { font-size: var(--text-xs); color: var(--color-ink-2); }
.facts dd { margin: 0; font-weight: 600; }
.project-lead { margin-top: var(--space-xl); aspect-ratio: 16 / 8; border-radius: var(--radius-card); overflow: hidden; background: var(--color-paper-3); }
.project-lead img { width: 100%; height: 100%; object-fit: cover; }
.gallery-section { padding-block: var(--space-2xl); }
.gallery-section.alt { background: var(--color-paper-2); }
.gallery { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--space-xs); margin-top: var(--space-lg); }
.gallery figure { margin: 0; }
.gallery a { display: block; aspect-ratio: 3 / 4; overflow: hidden; border-radius: var(--radius-media); background: var(--color-paper-3); }
.gallery img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--dur-long) var(--ease-out); }
.gallery a:hover img { transform: scale(1.03); }
.gallery figcaption { margin-top: var(--space-3xs); color: var(--color-ink-2); font-size: var(--text-xs); line-height: 1.5; }
.collapsible:not(.is-open) figure:nth-child(n + 13) { display: none; }
.show-all { margin-top: var(--space-lg); }
.more { padding-block: var(--space-2xl) var(--space-3xl); }
.more-all { margin-top: var(--space-lg); }
.narrow { max-width: 40rem; }
.narrow .btn { margin-top: var(--space-md); }

/* ---------- floating side rail (project pages, desktop) ---------- */
.side-rail {
  position: fixed; left: var(--space-xs); top: 50%; z-index: 15;
  display: none; flex-direction: column; gap: 2px; padding: var(--space-3xs);
  background: var(--color-glass); backdrop-filter: blur(14px) saturate(1.4); -webkit-backdrop-filter: blur(14px) saturate(1.4);
  border: 1px solid var(--color-rule); border-radius: 22px; box-shadow: var(--shadow-pill);
  opacity: 0; pointer-events: none; transform: translate(-8px, -50%);
  transition: opacity var(--dur-med) var(--ease-out), transform var(--dur-med) var(--ease-out);
}
.side-rail.is-visible { opacity: 1; pointer-events: auto; transform: translate(0, -50%); }
.side-rail a { display: flex; align-items: center; gap: var(--space-2xs); min-height: 40px; padding-inline: var(--space-xs); border-radius: 16px; color: var(--color-ink-2); text-decoration: none; font-size: var(--text-xs); font-weight: 500; white-space: nowrap; transition: background-color var(--dur-short) var(--ease-out), color var(--dur-short) var(--ease-out); }
.side-rail a:hover { background: var(--color-paper-3); color: var(--color-ink); }
.side-rail a.is-active { background: var(--color-accent-soft); color: var(--color-accent); }
.side-rail small { font-size: var(--text-xs); color: var(--color-accent); font-variant-numeric: tabular-nums; }
.rail-icon { width: 18px; height: 18px; flex: none; }
@media (min-width: 82rem) { .side-rail { display: flex; } .side-rail .rail-label { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); } .side-rail a { flex-direction: column; justify-content: center; gap: 0; min-width: 44px; min-height: 48px; padding: var(--space-3xs); } .side-rail small { line-height: 1.2; } }
@media (min-width: 100rem) { .side-rail .rail-label { position: static; width: auto; height: auto; overflow: visible; clip-path: none; } .side-rail a { flex-direction: row; justify-content: flex-start; gap: var(--space-2xs); min-height: 40px; padding: 0 var(--space-xs); } }

/* ---------- viewer ---------- */
.viewer { border: 0; padding: 0; background: transparent; max-width: 100%; max-height: 100%; width: 100%; height: 100%; }
.viewer::backdrop { background: var(--color-scrim); }
.viewer img { max-width: 92%; max-height: 84vh; margin: 5vh auto 0; object-fit: contain; border-radius: var(--radius-media); }
.viewer-cap { color: var(--color-on-scrim); text-align: center; margin: var(--space-xs) var(--space-md); font-size: var(--text-sm); font-variant-numeric: tabular-nums; }
.viewer button { position: fixed; display: grid; place-items: center; width: 48px; height: 48px; border: 0; border-radius: var(--radius-pill); background: var(--color-glass); color: var(--color-ink); font-size: 1.75rem; line-height: 1; cursor: pointer; }
.viewer-prev { left: var(--space-sm); top: calc(50% - 24px); }
.viewer-next { right: var(--space-sm); top: calc(50% - 24px); }
.viewer-close { right: var(--space-sm); top: var(--space-sm); }

/* ---------- responsive ---------- */
@media (max-width: 60rem) {
  .hero-grid, .project-head, .contact-card { grid-template-columns: minmax(0, 1fr); }
  .hero-grid { gap: var(--space-xl); }
  .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .card-cta .card-body { min-height: 14rem; }
  .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .gallery { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .project-lead { aspect-ratio: 4 / 3; }
  .nav { display: none; }
}
@media (max-width: 40rem) {
  .pill { width: 100%; justify-content: space-between; }
  .logo-text small { display: none; }
  .hero { padding-top: var(--space-xl); }
  .grid, .steps { grid-template-columns: minmax(0, 1fr); }
  .stats { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .stats li:last-child { grid-column: 1 / -1; }
  .gallery { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-2xs); }
  .contact-card { padding: var(--space-xl) var(--space-md); }
  .works, .how { padding-top: var(--space-2xl); }
    .viewer-prev, .viewer-next { top: auto; bottom: var(--space-sm); }
  .card-cta { display: none; }
  .more .card:nth-child(n + 3) { display: none; }                       /* the contact band follows right after */
  .filters { flex-wrap: nowrap; overflow-x: auto; scrollbar-width: none; margin-inline: calc(-1 * var(--gutter)); padding-inline: var(--gutter); }
  .chip { flex: none; }
  .steps { gap: 0; }
  .steps li { display: grid; grid-template-columns: 2.75rem minmax(0, 1fr); align-items: baseline; border-top-width: 1px; padding-block: var(--space-sm); }
  .steps p { margin-top: 0; }
  .card-body { padding: var(--space-sm); }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 1ms !important; animation-duration: 1ms !important; }
  .card > a:hover, .contact-btn:hover { transform: none; }
  .card > a:hover .card-media img, .gallery a:hover img, .hero-media:hover img { transform: none; }
}