/* ============================================================
   GUILD ATELIER — HOMEPAGE (Refined Atelier)
   Self-contained stylesheet, scoped to index.html only.
   Deliberately does not touch /css/styles.css so that
   /hospitality, /professional, /notes and /ielts-coach keep
   their current appearance unchanged.
   ============================================================ */

:root {
  /* ---- Color: warm ivory system, brown as rare accent ---- */
  --ivory:        #F6F1E7;   /* dominant background */
  --ivory-deep:   #EFE7D7;   /* slightly deeper neutral, used once (Communication & Education) */
  --ink:          #241E18;   /* primary text — warm near-black, never pure black */
  --ink-soft:     #55483C;   /* secondary / supporting text on ivory */
  --ink-faint:    #8A7C6C;   /* tertiary text — captions, meta */

  --umber:        #5B3320;   /* the two "heartbeat" fields: Similarity Trap base */
  --umber-deep:   #3A2013;   /* Closing CTA base — deeper, leather-adjacent */
  --umber-line:   rgba(91, 51, 32, 0.18);   /* hairline rules/borders on ivory */
  --umber-line-strong: rgba(91, 51, 32, 0.32);

  --gold:         #A47C2E;  /* restrained gold — linework only */
  --gold-soft:    rgba(164, 124, 46, 0.4);
  --gold-on-umber: #D8BD84; /* muted gold, legible on brown fields */

  --cream:        #F4EBDA;  /* text on umber fields */
  --cream-soft:   rgba(244, 235, 218, 0.83);

  --leather-shadow: rgba(0, 0, 0, 0.35);

  /* ---- Type ---- */
  --font-serif: 'Cormorant Garamond', Georgia, 'Times New Roman', serif;
  --font-sans:  'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* ---- Space ---- */
  --sp-1: 0.5rem;
  --sp-2: 1rem;
  --sp-3: 1.75rem;
  --sp-4: 2.75rem;
  --sp-5: 4.5rem;
  --sp-6: 7rem;
  --sp-7: 9.5rem;

  /* ---- Layout ---- */
  --w-wide:   1180px;
  --w-essay:  700px;
  --w-narrow: 600px;

  --radius: 1px;
}

/* ============================================================
   Reset & base
   ============================================================ */
.ga-page * { margin: 0; padding: 0; box-sizing: border-box; }

.ga-page {
  background: var(--ivory);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.ga-page img { max-width: 100%; display: block; }
.ga-page a { color: inherit; text-decoration: none; }

.ga-page h1, .ga-page h2, .ga-page h3, .ga-page h4 {
  font-family: var(--font-serif);
  color: var(--ink);
  font-weight: 600;
  line-height: 1.18;
}

.ga-page a:focus-visible,
.ga-page button:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  .ga-page * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* ============================================================
   Shared bits
   ============================================================ */
.ga-container {
  max-width: var(--w-wide);
  margin: 0 auto;
  padding: 0 var(--sp-4);
}
.ga-container--essay {
  max-width: var(--w-essay);
  margin: 0 auto;
  padding: 0 var(--sp-3);
}
.ga-container--narrow {
  max-width: var(--w-narrow);
  margin: 0 auto;
  padding: 0 var(--sp-3);
}

.ga-eyebrow {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-faint);
  font-weight: 600;
  margin-bottom: var(--sp-2);
}

.ga-hairline {
  border: none;
  border-top: 1px solid var(--umber-line);
  width: 100%;
}

/* text-first link, used for quiet "read more" style links throughout */
.ga-link {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--umber);
  border-bottom: 1px solid var(--umber-line-strong);
  padding-bottom: 0.15em;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.ga-link:hover { color: var(--gold); border-color: var(--gold); }

.ga-link--on-umber {
  color: var(--cream);
  border-bottom-color: rgba(244, 235, 218, 0.35);
}
.ga-link--on-umber:hover { color: var(--gold-on-umber); border-color: var(--gold-on-umber); }

/* bordered CTA — used everywhere except the closing section */
.ga-btn {
  display: inline-block;
  padding: 0.8em 1.9em;
  border: 1px solid var(--umber);
  color: var(--umber);
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: var(--radius);
  transition: background 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}
.ga-btn:hover {
  background: var(--umber);
  color: var(--ivory);
}

/* the ONE solid/filled button on the whole page — Closing CTA only */
.ga-btn--solid {
  background: var(--gold-on-umber);
  border: 1px solid var(--gold-on-umber);
  color: var(--umber-deep);
}
.ga-btn--solid:hover {
  background: var(--cream);
  border-color: var(--cream);
  color: var(--umber-deep);
}

.ga-section-head {
  max-width: var(--w-narrow);
  margin-bottom: var(--sp-4);
}

/* rings mark, used sparingly: header, hero, closing CTA, footer */
.ga-mark {
  display: block;
  width: auto;
}

/* ============================================================
   Header
   ============================================================ */
.ga-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(246, 241, 231, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--umber-line);
}

.ga-header-inner {
  max-width: var(--w-wide);
  margin: 0 auto;
  padding: 1rem var(--sp-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-3);
}

.ga-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex: 0 0 auto;
}
.ga-brand .ga-mark { width: 30px; height: 30px; }
.ga-brand-name {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: 0.01em;
}

.ga-nav {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  font-size: 0.86rem;
}
.ga-nav a:not(.ga-nav-cta) {
  color: var(--ink-soft);
  transition: color 0.2s ease;
}
.ga-nav a:not(.ga-nav-cta):hover { color: var(--umber); }

.ga-nav-cta {
  border: 1px solid var(--umber-line-strong);
  padding: 0.5em 1.1em;
  border-radius: var(--radius);
  color: var(--umber) !important;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  white-space: nowrap;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}
.ga-nav-cta:hover {
  background: var(--umber);
  border-color: var(--umber);
  color: var(--ivory) !important;
}

/* The homepage's new copy has no approved Vietnamese translations yet,
   so the toggle is hidden here to avoid promising functionality the
   page can't deliver. The underlying toggle system (js/lang-toggle.js)
   is untouched and still runs on every other page. */
.ga-lang-toggle {
  display: none;
  align-items: center;
  gap: 0.4em;
  background: none;
  border: 1px solid var(--umber-line);
  border-radius: var(--radius);
  padding: 0.42em 0.75em;
  font-family: var(--font-sans);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  cursor: pointer;
  color: var(--ink-faint);
  flex: 0 0 auto;
}
.ga-lang-toggle:hover { border-color: var(--umber-line-strong); }
.ga-lang-divider { color: var(--ink-faint); opacity: 0.6; }
html[data-current-lang="en"] .ga-lang-en { color: var(--umber); }
html[data-current-lang="vi"] .ga-lang-vi { color: var(--umber); }

/* nav is restructured on smaller screens; see responsive block */
.ga-nav-links { display: flex; align-items: center; gap: var(--sp-3); }

/* Hamburger toggle — hidden on desktop, shown only at the mobile breakpoint */
.ga-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 34px;
  height: 34px;
  flex: 0 0 auto;
  background: none;
  border: 1px solid var(--umber-line-strong);
  border-radius: var(--radius);
  cursor: pointer;
}
.ga-menu-toggle span {
  display: block;
  width: 15px;
  height: 1px;
  background: var(--ink);
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.ga-menu-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.ga-menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.ga-menu-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* Mobile nav panel — plain vertical list, native [hidden] for accessibility */
.ga-mobile-nav {
  display: none;
}
.ga-mobile-nav:not([hidden]) {
  display: flex;
  flex-direction: column;
  background: var(--ivory);
  border-top: 1px solid var(--umber-line);
  padding: var(--sp-1) var(--sp-3) var(--sp-3);
}
.ga-mobile-nav a:not(.ga-btn) {
  padding: 0.85rem 0.1rem;
  font-size: 1rem;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--umber-line);
}
.ga-mobile-nav a:not(.ga-btn):hover { color: var(--umber); }
.ga-mobile-nav .ga-btn {
  margin-top: var(--sp-2);
  text-align: center;
}

/* ============================================================
   1. Hero — typography only
   ============================================================ */
.ga-hero {
  padding: var(--sp-7) var(--sp-4) var(--sp-6);
}

.ga-hero-inner {
  max-width: 880px;
  margin: 0 auto;
}

.ga-hero-title {
  font-size: clamp(2.6rem, 6vw, 4.4rem);
  letter-spacing: 0.005em;
  max-width: 15ch;
}

.ga-hero-body {
  margin-top: var(--sp-4);
  max-width: 620px;
}

.ga-hero-body p {
  font-size: 1.05rem;
  color: var(--ink-soft);
  line-height: 1.7;
}
.ga-hero-body p + p {
  margin-top: var(--sp-2);
}

/* the second hero line carries more weight — it's the actual thesis */
.ga-hero-thesis {
  font-family: var(--font-serif);
  font-size: 1.3rem !important;
  font-style: italic;
  color: var(--ink) !important;
  line-height: 1.5 !important;
}

.ga-hero-ctas {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  margin-top: var(--sp-4);
  flex-wrap: wrap;
}

/* ============================================================
   2. The Similarity Trap — heartbeat #1
   ============================================================ */
.ga-trap {
  background: var(--umber);
  padding: var(--sp-6) var(--sp-4);
}

.ga-trap-inner {
  max-width: var(--w-essay);
  margin: 0 auto;
}

.ga-trap-quote {
  font-family: var(--font-serif);
  font-size: clamp(1.7rem, 3.4vw, 2.5rem);
  font-weight: 500;
  font-style: italic;
  color: var(--cream);
  line-height: 1.45;
}

.ga-trap-body {
  margin-top: var(--sp-4);
}
.ga-trap-body p {
  font-size: 0.93rem;
  color: var(--cream-soft);
  line-height: 1.75;
}
.ga-trap-body p + p { margin-top: var(--sp-2); }

.ga-trap-link {
  display: inline-block;
  margin-top: var(--sp-3);
}

/* ============================================================
   3. How We Work — flagship + two secondary
   ============================================================ */
.ga-work {
  padding: var(--sp-6) var(--sp-4);
}

.ga-work-flagship {
  max-width: 760px;
  padding-bottom: var(--sp-5);
  margin-bottom: var(--sp-5);
  border-bottom: 1px solid var(--umber-line);
}

.ga-work-flagship .ga-eyebrow { color: var(--umber); }

.ga-work-flagship h3 {
  font-size: clamp(2rem, 4vw, 2.7rem);
  margin-bottom: var(--sp-2);
}

.ga-work-flagship p {
  font-size: 1.02rem;
  color: var(--ink-soft);
  max-width: 62ch;
  line-height: 1.75;
}

.ga-work-flagship .ga-btn {
  margin-top: var(--sp-3);
}

.ga-work-secondary {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--sp-5);
  max-width: var(--w-wide);
}

.ga-work-item h4 {
  font-size: 1.35rem;
  margin-bottom: var(--sp-1);
  color: var(--ink);
}

.ga-work-item p {
  font-size: 0.88rem;
  color: var(--ink-soft);
  line-height: 1.7;
}

.ga-work-item .ga-link {
  margin-top: var(--sp-2);
  font-size: 0.85rem;
}

/* ============================================================
   4. Who This Is For
   ============================================================ */
.ga-audience {
  padding: 0 var(--sp-4) 5.75rem; /* tightened from var(--sp-6)/7rem — see note above */
}

.ga-audience-inner {
  max-width: 760px;
}

.ga-audience-primary {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  color: var(--ink);
  line-height: 1.65;
  font-weight: 500;
}

.ga-audience-secondary {
  margin-top: var(--sp-3);
  font-size: 0.88rem;
  color: var(--ink-faint);
  max-width: 56ch;
  line-height: 1.7;
}

/* ============================================================
   5. Background
   ============================================================ */
.ga-background {
  padding: 0 var(--sp-4) var(--sp-6);
}

.ga-background-inner {
  max-width: 700px;
}

.ga-background p {
  font-size: 0.96rem;
  color: var(--ink-soft);
  line-height: 1.75;
}
.ga-background p + p { margin-top: var(--sp-2); }

/* ============================================================
   6. From the Practice — case note
   ============================================================ */
.ga-case {
  padding: 0 var(--sp-4) var(--sp-6);
}

.ga-case-inner {
  max-width: var(--w-essay);
  padding-top: var(--sp-5);
  border-top: 1px solid var(--umber-line);
}

.ga-case-label {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--umber);
  font-weight: 600;
  margin-bottom: var(--sp-2);
}

.ga-case h3 {
  font-size: clamp(1.7rem, 3vw, 2.2rem);
  max-width: 22ch;
  margin-bottom: var(--sp-3);
}

.ga-case p {
  font-size: 0.93rem;
  color: var(--ink-soft);
  line-height: 1.8;
}

/* ============================================================
   7. Recent Thinking — editorial index, no thumbnails
   ============================================================ */
.ga-insights {
  padding: 0 var(--sp-4) var(--sp-6);
}

.ga-insights-inner {
  max-width: 820px;
}

.ga-insights-list {
  border-top: 1px solid var(--umber-line);
}

.ga-insight-row {
  display: block;
  padding: var(--sp-3) 0;
  border-bottom: 1px solid var(--umber-line);
  transition: padding-left 0.2s ease;
}
.ga-insight-row:hover { padding-left: 0.4rem; }

.ga-insight-tag {
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--umber);
  font-weight: 600;
}

.ga-insight-row h4 {
  font-size: 1.3rem;
  margin-top: 0.35rem;
  color: var(--ink);
}

.ga-insight-desc {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.84rem;
  color: var(--ink-faint);
}

.ga-insights .ga-link { margin-top: var(--sp-3); }

/* ============================================================
   8. Communication, Learned and Practiced
   ============================================================ */
.ga-comm {
  background: var(--ivory-deep);
  padding: var(--sp-5) var(--sp-4);
}

.ga-comm-inner {
  max-width: 700px;
}

.ga-comm h3 {
  font-size: 1.5rem;
  margin-bottom: var(--sp-2);
}

.ga-comm p {
  font-size: 0.89rem;
  color: var(--ink-soft);
  line-height: 1.75;
  max-width: 60ch;
}

.ga-comm-links {
  display: flex;
  gap: var(--sp-4);
  margin-top: var(--sp-3);
  flex-wrap: wrap;
}

/* ============================================================
   9. Closing CTA — heartbeat #2, the leather moment
   ============================================================ */
.ga-closing {
  position: relative;
  padding: var(--sp-6) var(--sp-4);
  text-align: center;
  background:
    radial-gradient(ellipse at 50% -10%, rgba(216, 189, 132, 0.10), transparent 55%),
    linear-gradient(155deg, var(--umber) 0%, var(--umber-deep) 100%);
  overflow: hidden;
}

/* subtle restrained leather-grain suggestion — low-contrast, not a loud texture */
.ga-closing::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0.5;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.045' numOctaves='4' stitchTiles='stitch' result='t'/%3E%3CfeColorMatrix in='t' type='matrix' values='0 0 0 0 0  0 0 0 0 0  0 0 0 0 0  0 0 0 0.06 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  pointer-events: none;
}

.ga-closing-inner {
  position: relative;
  z-index: 1;
  max-width: 620px;
  margin: 0 auto;
}

.ga-closing .ga-mark {
  width: 38px;
  height: 38px;
  margin: 0 auto 0.5rem; /* tightened from var(--sp-3)/28px — 20px less */
  filter: drop-shadow(0 2px 10px rgba(0,0,0,0.3));
}

.ga-closing h2 {
  font-size: clamp(2.1rem, 4vw, 3rem);
  color: var(--cream);
}

.ga-closing p {
  margin-top: var(--sp-3);
  font-size: 0.96rem;
  color: var(--cream-soft);
  line-height: 1.75;
}

.ga-closing .ga-btn--solid {
  margin-top: var(--sp-4);
}

/* ============================================================
   Footer
   ============================================================ */
.ga-footer {
  padding: var(--sp-5) var(--sp-4) var(--sp-4);
  text-align: center;
}

.ga-footer .ga-mark {
  width: 26px;
  height: 26px;
  margin: 0 auto var(--sp-2);
  opacity: 0.85;
}

.ga-footer-tagline {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  color: var(--ink);
  margin-bottom: var(--sp-2);
}

.ga-footer-nav {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--sp-1) var(--sp-3);
  font-size: 0.82rem;
  color: var(--ink-faint);
  margin-bottom: var(--sp-2);
}
.ga-footer-nav a:hover { color: var(--umber); }

.ga-footer-email {
  font-size: 0.82rem;
  color: var(--ink-faint);
}
.ga-footer-email a:hover { color: var(--umber); }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 980px) {
  .ga-work-secondary { grid-template-columns: 1fr; gap: var(--sp-4); }
}

@media (max-width: 860px) {
  .ga-nav-links { display: none; }
  .ga-nav-cta { display: none; }
  .ga-menu-toggle { display: flex; }
  .ga-header-inner { padding: 0.9rem var(--sp-3); }

  .ga-hero { padding: var(--sp-6) var(--sp-3) var(--sp-5); }
  .ga-hero-title { max-width: 100%; }
  .ga-hero-ctas { flex-direction: column; align-items: flex-start; gap: var(--sp-2); }

  .ga-trap { padding: var(--sp-5) var(--sp-3); }
  .ga-work { padding: var(--sp-5) var(--sp-3); }
  .ga-audience { padding: 0 var(--sp-3) var(--sp-5); }
  .ga-background { padding: 0 var(--sp-3) var(--sp-5); }
  .ga-case { padding: 0 var(--sp-3) var(--sp-5); }
  .ga-insights { padding: 0 var(--sp-3) var(--sp-5); }
  .ga-comm { padding: var(--sp-4) var(--sp-3); }
  .ga-closing { padding: var(--sp-5) var(--sp-3); }
  .ga-footer { padding: var(--sp-4) var(--sp-3) var(--sp-3); }

  .ga-work-flagship { margin-bottom: var(--sp-4); padding-bottom: var(--sp-4); }
}

@media (max-width: 480px) {
  .ga-brand-name { display: none; }
  .ga-comm-links { flex-direction: column; gap: var(--sp-2); }
}