/* ================================================
   Art Book Pre-order — style.css
   Minimalist, serif-forward, warm palette
   ================================================ */

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

img { max-width: 100%; display: block; }
a { color: inherit; }
button { cursor: pointer; font: inherit; }
ul { list-style: none; }

/* ---------- Design tokens ---------- */
:root {
  --bg:       #FAFAF7;
  --surface:  #F2EDE6;
  --border:   #DDD9D3;
  --text:     #282420;
  --muted:    #6B6560;
  --accent:   #7A6248;

  --f-display: 'Playfair Display', 'Noto Serif Thai', Georgia, serif;
  --f-body:    'Noto Serif Thai', Georgia, serif;

  --w-content: 720px;
  --w-narrow:  540px;

  --xs: 0.5rem;
  --sm: 1rem;
  --md: 2rem;
  --lg: 4rem;
  --xl: 7rem;
}

/* ---------- Base ---------- */
html { font-size: 18px; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--f-body);
  font-size: 1rem;
  line-height: 1.8;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

h1, h2, h3 {
  font-family: var(--f-display);
  font-weight: 400;
  line-height: 1.3;
}

/* ---------- Layout ---------- */
.container {
  width: min(var(--w-content), 100% - 2 * var(--md));
  margin-inline: auto;
}

.container--narrow {
  width: min(var(--w-narrow), 100% - 2 * var(--md));
  margin-inline: auto;
}

main { flex: 1; }

/* ---------- Header / Nav ---------- */
.site-header {
  border-bottom: 1px solid var(--border);
  padding-block: var(--sm);
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 10;
}

.nav {
  width: min(var(--w-content), 100% - 2 * var(--md));
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sm);
}

.nav-brand {
  font-family: var(--f-display);
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: var(--md);
}

.nav-links a {
  font-size: 0.8rem;
  text-decoration: none;
  color: var(--muted);
  letter-spacing: 0.03em;
}

.nav-links a:hover { color: var(--text); }

/* ---------- Hero ---------- */
.hero {
  padding-block: var(--xl);
  border-bottom: 1px solid var(--border);
}

.hero-content {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: var(--lg);
  align-items: start;
}

.book-cover {
  aspect-ratio: 3 / 4;
  background: var(--surface);
  border: 1px solid var(--border);
  overflow: hidden;
}

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

.book-cover-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
}

.book-label {
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--sm);
}

.book-title {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  margin-bottom: var(--xs);
}

.book-subtitle {
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: var(--md);
}

.book-price {
  font-family: var(--f-display);
  font-size: 1.5rem;
}

.price-note {
  font-family: var(--f-body);
  font-size: 0.8rem;
  color: var(--muted);
}

/* ---------- Book info ---------- */
.book-info {
  padding-block: var(--lg);
  border-bottom: 1px solid var(--border);
}

.book-info h2 {
  font-size: 1.1rem;
  margin-bottom: var(--sm);
}

.book-info > .container--narrow > p {
  color: var(--muted);
  margin-bottom: var(--md);
}

.book-specs {
  border-top: 1px solid var(--border);
  margin-top: var(--md);
}

.spec-row {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: var(--sm);
  padding-block: 0.7rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.88rem;
}

.spec-row dt { color: var(--muted); }

/* ---------- Waitlist ---------- */
.waitlist-section {
  padding-block: var(--lg);
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.waitlist-section h2 {
  font-size: 1.1rem;
  margin-bottom: var(--xs);
}

/* honeypot field: ออกนอกหน้าจอทางซ้าย แต่ยังอยู่ใน DOM ให้บอทเห็น */
.hp-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
}

.wl-success {
  margin-top: var(--sm);
  color: var(--accent);
  font-size: 0.9rem;
  font-style: italic;
}

/* ---------- Language switch (fixed, top corner) ---------- */
.lang-switch {
  position: fixed;
  top: 0.9rem;
  right: 0.9rem;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 0.15rem;
  padding: 0.25rem 0.55rem;
  background: rgba(250, 250, 247, 0.82);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.72rem;
  letter-spacing: 0.05em;
}

.lang-switch button {
  background: none;
  border: none;
  padding: 0.15rem 0.3rem;
  color: var(--muted);
  font-family: var(--f-body);
  font-size: inherit;
  letter-spacing: inherit;
  line-height: 1;
}

.lang-switch button.on { color: var(--text); font-weight: 500; }
.lang-switch button:hover { color: var(--text); }
.lang-switch .sep { color: var(--border); }

/* ---------- Colophon (single centered line) ---------- */
.colophon-line {
  font-family: var(--f-display);
  font-size: 0.92rem;
  line-height: 2;
  color: var(--muted);
  text-align: center;
}

/* ---------- Pre-order form ---------- */
.preorder-form-section {
  padding-block: var(--lg);
}

.preorder-form-section h2 {
  font-size: 1.1rem;
  margin-bottom: var(--xs);
}

.form-intro {
  color: var(--muted);
  font-size: 0.88rem;
  margin-bottom: var(--md);
}

.form-group {
  margin-bottom: 1.4rem;
}

.form-group label {
  display: block;
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin-bottom: 0.4rem;
}

.required { color: var(--accent); }

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 0;
  padding: 0.55rem 0.7rem;
  font-family: var(--f-body);
  font-size: 0.95rem;
  color: var(--text);
  outline: none;
  transition: border-color 0.15s;
  appearance: none;
  -webkit-appearance: none;
}

.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='7' viewBox='0 0 12 7'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236B6560' stroke-width='1.4' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.7rem center;
  padding-right: 2rem;
  cursor: pointer;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent);
}

.form-group textarea {
  resize: vertical;
  min-height: 80px;
}

.form-message--error {
  padding: 0.8rem var(--sm);
  border: 1px solid #b33;
  color: #b33;
  font-size: 0.88rem;
  margin-bottom: var(--sm);
}

.btn-submit {
  width: 100%;
  padding: 0.85rem;
  background: var(--text);
  color: var(--bg);
  border: none;
  font-size: 0.9rem;
  letter-spacing: 0.06em;
  transition: background 0.2s;
}

.btn-submit:hover:not(:disabled) { background: var(--accent); }
.btn-submit:disabled { opacity: 0.55; cursor: not-allowed; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding-block: var(--md);
  margin-top: auto;
}

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

.site-footer p { font-size: 0.8rem; color: var(--muted); }

.footer-nav { display: flex; gap: var(--md); }

.footer-nav a {
  font-size: 0.8rem;
  color: var(--muted);
  text-decoration: none;
}

.footer-nav a:hover { color: var(--text); }

/* ---------- Static pages (privacy / thanks) ---------- */
.page-header {
  padding-block: var(--lg);
  border-bottom: 1px solid var(--border);
}

.page-header h1 { font-size: clamp(1.5rem, 3.5vw, 2rem); }
.page-header p  { color: var(--muted); margin-top: var(--xs); font-size: 0.9rem; }

.page-body {
  padding-block: var(--lg);
  color: var(--muted);
  font-size: 0.92rem;
}

.page-body h2 {
  color: var(--text);
  font-size: 1rem;
  margin-top: var(--md);
  margin-bottom: var(--xs);
}

.page-body p,
.page-body li { margin-bottom: 0.75rem; }

.page-body ul {
  padding-left: var(--sm);
  list-style: disc;
}

/* ---------- Thanks page ---------- */
.thanks-section {
  padding-block: var(--xl);
  text-align: center;
}

.thanks-section h1 {
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  margin-bottom: var(--xs);
}

.thanks-section p {
  color: var(--muted);
  max-width: 38ch;
  margin-inline: auto;
}

.thanks-section a { color: var(--accent); }

.thanks-divider {
  width: 40px;
  height: 1px;
  background: var(--border);
  margin: var(--md) auto;
}

.back-link {
  display: inline-block;
  margin-top: var(--md);
  font-size: 0.85rem;
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
  padding-bottom: 1px;
}

.back-link:hover { color: var(--text); border-color: var(--text); }

/* ---------- Booth page ---------- */
.events-list {
  border-top: 1px solid var(--border);
  margin-top: var(--md);
}

.event-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: var(--sm);
  padding-block: 1rem;
  border-bottom: 1px solid var(--border);
}

.event-date {
  color: var(--muted);
  font-size: 0.82rem;
  padding-top: 0.15rem;
}

.event-name {
  font-family: var(--f-display);
  font-size: 0.95rem;
  margin-bottom: 0.2rem;
}

.event-detail {
  color: var(--muted);
  font-size: 0.82rem;
}

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
  :root {
    --lg: 3rem;
    --xl: 4rem;
  }

  .hero-content {
    grid-template-columns: 1fr;
  }

  .book-cover {
    max-width: 200px;
  }

  .spec-row {
    grid-template-columns: 100px 1fr;
  }

  .nav-links { gap: var(--sm); }

  .event-item {
    grid-template-columns: 1fr;
    gap: 0.3rem;
  }
}

/* ════════════════════════════════════════════════
   Editorial redesign — type, sections, motion
   ════════════════════════════════════════════════ */

/* ===== tokens เพิ่ม ===== */
:root{
  --f-display:'EB Garamond','Noto Serif Thai',Georgia,serif;
  --f-sans:'Inter','Noto Serif Thai',system-ui,sans-serif;
  --peach:#ffdab8;
  --cream-2:#F4EEE5;          /* ครีมเข้มขึ้น 1 สเตป */
}
body{ font-family:var(--f-display); }   /* base เป็น serif วรรณกรรม */

/* ===== reveal motion ===== */
[data-reveal]{ opacity:0; transform:translateY(24px); transition:opacity .7s ease, transform .7s ease; }
[data-reveal].in{ opacity:1; transform:none; }
@media (prefers-reduced-motion:reduce){
  [data-reveal]{ opacity:1; transform:none; transition:none; }
}

/* ===== section ทั่วไป + folio ===== */
.sec{ width:min(var(--w-content),100% - 2*var(--md)); margin-inline:auto; padding-block:clamp(4rem,12vw,9rem); position:relative; }
.folio{ display:block; font-family:var(--f-sans); font-size:.7rem; letter-spacing:.25em; color:var(--muted); margin-bottom:var(--lg); }
.sec-label{ font-family:var(--f-sans); font-size:.72rem; letter-spacing:.22em; text-transform:uppercase; color:var(--accent); margin-bottom:var(--md); }

/* ===== S2 Preface ===== */
.sec--preface{ background:var(--cream-2); width:100%; }
.preface-body{ width:min(58ch,100% - 2*var(--md)); margin-inline:auto; font-size:clamp(1.25rem,2.6vw,1.7rem); line-height:1.85; font-style:italic; }
.preface-body::first-letter{ float:left; font-size:4.4em; line-height:.78; padding:.05em .12em 0 0; color:var(--accent); }

/* ===== S3 Eight Years ===== */
.year-row{ display:grid; grid-template-columns:minmax(0,1fr) minmax(0,1.1fr); gap:clamp(1rem,4vw,3rem); align-items:center; padding-block:clamp(2rem,5vw,3.5rem); border-top:1px solid var(--border); }
.year-row--r{ direction:rtl; } .year-row--r>*{ direction:ltr; }
.year-num{ font-family:var(--f-display); font-weight:500; font-size:clamp(4rem,18vw,11rem); line-height:.9; color:var(--peach); }
.year-row p{ font-size:clamp(1.05rem,2.2vw,1.4rem); line-height:1.7; max-width:34ch; }

/* ===== S4 Spread full-bleed ===== */
.sec--spread{ width:100%; height:min(90svh,80vw); overflow:hidden; }
.sec--spread img{ width:100%; height:120%; object-fit:cover; will-change:transform; }

/* ===== S5 Works ===== */
.sec--works{ text-align:center; }
.works-list li{ font-family:var(--f-display); font-style:italic; font-size:clamp(1.3rem,3.2vw,2.1rem); line-height:1.9; color:var(--muted); transition:color .3s; }
.works-list li:hover{ color:var(--accent); }

/* ===== S6 Object spec ===== */
.spec>div{ display:grid; grid-template-columns:130px 1fr; gap:var(--sm); padding-block:.85rem; border-bottom:1px solid var(--border); }
.spec dt{ font-family:var(--f-sans); font-size:.7rem; letter-spacing:.14em; text-transform:uppercase; color:var(--muted); padding-top:.15rem; }
.spec dd{ font-size:1rem; }

/* ===== S7 About ===== */
.about-body{ width:min(54ch,100%); font-size:clamp(1.05rem,2.2vw,1.3rem); line-height:1.85; color:var(--muted); }

/* ===== S8 Epilogue ===== */
.sec--epilogue{ background:var(--cream-2); width:100%; text-align:center; }
.epilogue-pull{ width:min(24ch,100% - 2*var(--md)); margin-inline:auto; font-family:var(--f-display); font-style:italic; font-size:clamp(1.6rem,5vw,3rem); line-height:1.5; padding-block:clamp(3rem,9vw,6rem); }

/* มือถือ: ปีซ้อนแนวตั้ง */
@media (max-width:640px){
  .year-row,.year-row--r{ grid-template-columns:1fr; direction:ltr; gap:.4rem; }
  .year-num{ font-size:clamp(3.5rem,22vw,5rem); }
}