:root {
  --ink: #14303a;
  --muted: #4d6d78;
  --bg: #eef6f8;
  --bg-soft: #e0eef2;
  --panel: #f7fbfc;
  --line: rgba(20, 48, 58, 0.12);
  --accent: #1f8a8a;
  --accent-deep: #166868;
  --sky: #6eb8c4;
  --on-accent: #f7fbfc;
  --font: 'Anuphan', sans-serif;
  --heading: 'Kanit', 'Anuphan', sans-serif;
  --mono: 'IBM Plex Mono', 'Anuphan', monospace;
  --max: 1080px;
  --demo-h: 48px;
  --header-h: 72px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --radius: 4px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 120px; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

body {
  font-family: var(--font);
  color: var(--ink);
  line-height: 1.65;
  overflow-x: hidden;
  font-synthesis: none;
  background:
    radial-gradient(ellipse 55% 40% at 100% 0%, rgba(110, 184, 196, 0.35), transparent 55%),
    radial-gradient(ellipse 40% 30% at 0% 45%, rgba(31, 138, 138, 0.1), transparent 50%),
    linear-gradient(180deg, #f3fafb, var(--bg));
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; font-size: 16px; color: inherit; }
ul, ol { list-style: none; }
.wrap { width: min(100% - 2.5rem, var(--max)); margin-inline: auto; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.demo-bar {
  position: sticky; top: 0; z-index: 60;
  display: flex; justify-content: space-between; align-items: center;
  gap: 1rem; flex-wrap: wrap; padding: 0.55rem 1.25rem;
  background: #0d242c; color: #fff; font-size: 0.82rem;
}
.demo-bar strong {
  font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.06em;
  color: var(--sky); font-weight: 500;
}
.demo-bar__actions { display: flex; gap: 0.45rem; flex-wrap: wrap; }
.demo-bar a {
  padding: 0.35rem 0.7rem; border: 1px solid rgba(255,255,255,0.25);
  border-radius: var(--radius); font-size: 0.78rem; font-weight: 500;
}
.demo-bar a.is-primary { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }

.site-header {
  position: sticky; top: var(--demo-h); z-index: 50;
  background: rgba(238, 246, 248, 0.94); backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.site-header__inner {
  display: flex; align-items: center; justify-content: space-between;
  min-height: var(--header-h); position: relative;
}
.brand {
  font-family: var(--heading); font-weight: 700; font-size: 1.28rem;
  display: inline-flex; align-items: baseline; gap: 0.45rem;
}
.brand small {
  font-family: var(--mono); font-size: 0.62rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--accent-deep); font-weight: 500;
}
.menu-toggle {
  display: none; background: none; border: 1px solid var(--line);
  padding: 0.45rem 0.8rem; cursor: pointer; border-radius: var(--radius);
}
.nav { display: flex; align-items: center; gap: 1.15rem; }
.nav a { font-size: 0.92rem; font-weight: 500; color: var(--muted); }
.nav-cta {
  background: var(--accent); color: var(--on-accent) !important;
  padding: 0.55rem 1.05rem; border-radius: var(--radius); font-weight: 700;
}

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 0.9rem 1.4rem; font-weight: 700; border-radius: var(--radius);
  border: 1.5px solid transparent; cursor: pointer;
  transition: transform 0.2s var(--ease);
}
.btn:hover { transform: translateY(-2px); }
.btn--primary { background: var(--accent); color: var(--on-accent); }
.btn--ghost { color: #fff; border-color: rgba(255,255,255,0.45); background: transparent; }
.btn--block { width: 100%; }
.btn-row { display: flex; flex-wrap: wrap; gap: 0.75rem; }

.hero {
  position: relative; min-height: min(90dvh, 820px);
  display: flex; align-items: flex-end; color: #fff; overflow: hidden;
}
.hero__media { position: absolute; inset: 0; }
.hero__media img {
  width: 100%; height: 100%; object-fit: cover;
  animation: ken 22s var(--ease) both;
}
.hero__media::after {
  content: ''; position: absolute; inset: 0;
  background:
    linear-gradient(115deg, rgba(13, 36, 44, 0.9) 0%, rgba(20, 48, 58, 0.55) 50%, rgba(20, 48, 58, 0.2) 100%),
    linear-gradient(0deg, rgba(13, 36, 44, 0.75) 0%, transparent 42%);
}
.hero__fx { position: absolute; inset: 0; pointer-events: none; z-index: 1; }
.air {
  position: absolute; border-radius: 50%; filter: blur(40px); opacity: 0.35;
  animation: drift 12s var(--ease) infinite alternate;
}
.air--1 { width: 280px; height: 280px; background: var(--sky); top: 15%; right: 10%; }
.air--2 { width: 200px; height: 200px; background: var(--accent); bottom: 20%; left: 8%; animation-delay: -4s; }
.hero__inner {
  position: relative; z-index: 2;
  width: min(100% - 2.5rem, var(--max));
  margin: 0 auto; padding: 0 0 3.5rem;
  animation: rise 0.9s var(--ease) both;
}
.hero__brand {
  font-family: var(--heading); font-size: clamp(1.8rem, 4.5vw, 2.8rem);
  font-weight: 700; letter-spacing: -0.02em; margin-bottom: 0.75rem;
}
.hero__brand span {
  display: block; font-family: var(--mono); font-size: 0.72rem;
  letter-spacing: 0.14em; text-transform: uppercase; font-weight: 500;
  color: var(--sky); margin-top: 0.35rem;
}
.hero h1 {
  font-family: var(--heading); font-size: clamp(1.65rem, 3.8vw, 2.45rem);
  font-weight: 600; line-height: 1.25; max-width: 18ch; margin-bottom: 0.85rem;
}
.hero h1 em { font-style: normal; color: var(--sky); }
.hero__lead { max-width: 34ch; color: rgba(255,255,255,0.85); margin-bottom: 1.4rem; }

.section { padding: 4.5rem 0; }
.section--soft { background: color-mix(in srgb, var(--bg-soft) 75%, transparent); }
.section--book {
  background: #0d242c; color: #eef6f8;
  background-image: radial-gradient(ellipse 45% 50% at 100% 0%, rgba(31, 138, 138, 0.28), transparent 55%);
}
.section__head { max-width: 38rem; margin-bottom: 2rem; }
.eyebrow {
  font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--accent-deep); margin-bottom: 0.55rem;
}
.eyebrow.light { color: var(--sky); }
.section__head h2, .section h2 {
  font-family: var(--heading); font-size: clamp(1.45rem, 2.8vw, 1.95rem);
  letter-spacing: -0.02em; line-height: 1.3; margin-bottom: 0.55rem;
}
.section__head p, .section p, .lede { color: var(--muted); }
.section--book p { color: rgba(238, 246, 248, 0.72); }

.list-meta {
  display: flex; flex-wrap: wrap; gap: 0.75rem 1.5rem;
  font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--muted); margin-bottom: 1rem;
}

.shot-table {
  border: 1px solid var(--line); background: var(--panel);
  border-radius: var(--radius); overflow: hidden;
}
.shot-table__head, .shot-row {
  display: grid;
  grid-template-columns: 2.5rem 1.4fr 0.9fr 0.8fr 5.5rem;
  gap: 0.75rem; align-items: center; padding: 0.95rem 1.1rem;
}
.shot-table__head {
  font-family: var(--mono); font-size: 0.65rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--muted); background: var(--bg-soft);
  border-bottom: 1px solid var(--line);
}
.shot-row { border-bottom: 1px solid var(--line); transition: background 0.2s ease; }
.shot-row:last-child { border-bottom: none; }
.shot-row:hover, .shot-row.is-on { background: rgba(31, 138, 138, 0.06); }
.shot-row--focus { box-shadow: inset 3px 0 0 var(--accent); }

.shot-check { display: grid; place-items: center; cursor: pointer; }
.shot-check input { position: absolute; opacity: 0; pointer-events: none; }
.shot-check .box {
  width: 1.15rem; height: 1.15rem; border: 1.5px solid var(--line);
  border-radius: 2px; background: #fff; transition: all 0.2s ease;
}
.shot-check input:checked + .box {
  background: var(--accent); border-color: var(--accent);
  box-shadow: inset 0 0 0 2px #fff;
}
.shot-row__body h3 { font-family: var(--heading); font-size: 1.05rem; font-weight: 600; }
.shot-row__body p { font-size: 0.88rem; color: var(--muted); }
.shot-row__lens {
  font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.04em; color: var(--accent-deep);
}
.status {
  font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.06em;
  text-transform: uppercase; padding: 0.3rem 0.5rem; border-radius: 2px; width: fit-content;
}
.status--open { background: rgba(31, 138, 138, 0.12); color: var(--accent-deep); }
.status--hold { background: rgba(110, 184, 196, 0.25); color: #1a5560; }
.status--done { background: rgba(20, 48, 58, 0.08); color: var(--muted); }
.row-btn {
  border: 1px solid var(--line); background: #fff; padding: 0.45rem 0.7rem;
  border-radius: var(--radius); cursor: pointer; font-weight: 600; font-size: 0.82rem;
  transition: background 0.2s ease, color 0.2s ease;
}
.row-btn:hover, .shot-row.is-on .row-btn {
  background: var(--accent); color: var(--on-accent); border-color: var(--accent);
}

.lens-tray {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.85rem;
}
.lens-chip {
  display: grid; gap: 0.65rem; text-align: left; cursor: pointer;
  border: 1px solid var(--line); background: var(--panel); padding: 0.55rem;
  border-radius: var(--radius); transition: border-color 0.2s ease, transform 0.2s var(--ease);
}
.lens-chip:hover, .lens-chip.is-active {
  border-color: var(--accent); transform: translateY(-2px);
}
.lens-chip img { width: 100%; aspect-ratio: 4/3; object-fit: cover; border-radius: 2px; }
.lens-chip strong { display: block; font-family: var(--heading); font-size: 1.05rem; }
.lens-chip small { color: var(--muted); font-size: 0.82rem; }

.brief-split {
  display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 2.5rem; align-items: center;
}
.brief-ticks { margin-top: 1.4rem; display: grid; gap: 0.75rem; }
.brief-ticks li {
  padding-left: 1.4rem; position: relative; font-weight: 500;
}
.brief-ticks li::before {
  content: ''; position: absolute; left: 0; top: 0.45rem;
  width: 0.65rem; height: 0.65rem; border: 2px solid var(--accent); border-radius: 2px;
}
.brief-photo { overflow: hidden; border-radius: var(--radius); }
.brief-photo img { width: 100%; aspect-ratio: 4/5; object-fit: cover; }
.brief-photo figcaption {
  font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--muted); margin-top: 0.65rem;
}

.book {
  display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 2.5rem; align-items: start;
}
.form { display: grid; gap: 1rem; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.field { display: grid; gap: 0.4rem; }
.field label {
  font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.08em; text-transform: uppercase;
  color: rgba(238, 246, 248, 0.65);
}
.field input, .field select, .field textarea {
  background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.18);
  border-radius: var(--radius); padding: 0.85rem 0.95rem; color: #fff;
}
.field input::placeholder { color: rgba(255,255,255,0.35); }
.field select option { color: var(--ink); background: #fff; }

.site-footer {
  padding: 1.5rem 0; border-top: 1px solid var(--line); background: var(--bg-soft);
}
.site-footer__inner {
  display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  font-size: 0.88rem; color: var(--muted);
}
.mono { font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.06em; }

.reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }

@keyframes ken {
  from { transform: scale(1.08); }
  to { transform: scale(1); }
}
@keyframes rise {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: none; }
}
@keyframes drift {
  from { transform: translate(0, 0); }
  to { transform: translate(-20px, 16px); }
}

@media (max-width: 900px) {
  .lens-tray { grid-template-columns: repeat(2, 1fr); }
  .brief-split, .book { grid-template-columns: 1fr; }
  .shot-table__head { display: none; }
  .shot-row {
    grid-template-columns: 2.5rem 1fr auto;
    grid-template-areas:
      "check body body"
      "check lens status"
      "check btn btn";
  }
  .shot-check { grid-area: check; }
  .shot-row__body { grid-area: body; }
  .shot-row__lens { grid-area: lens; }
  .status { grid-area: status; justify-self: end; }
  .row-btn { grid-area: btn; width: 100%; }
}
@media (max-width: 720px) {
  .menu-toggle { display: inline-flex; }
  .nav {
    display: none; position: absolute; top: 100%; right: 0; left: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--panel); border: 1px solid var(--line); padding: 0.5rem;
  }
  .nav.is-open { display: flex; }
  .nav a { padding: 0.85rem 1rem; border-bottom: 1px solid var(--line); }
  .nav-cta { text-align: center; margin-top: 0.35rem; }
  .field-row { grid-template-columns: 1fr; }
  .hero__inner { padding-bottom: 2.5rem; }
}