/* ==========================================================================
   Henry Chen — henrychency.com
   Refresh build: token-based stylesheet.
   Brand: Playfair Display + Open Sans, monochrome palette.
   ========================================================================== */

/* ---------- Design tokens ---------- */
:root {
  --ink: #151515;
  --ink-soft: #1b1b1b;
  --muted: #585858;
  --faint: #8c8c8c;
  --paper: #ffffff;
  --mist: #f4f1ec;          /* warm off-white — source hero tone */
  --line: #e6e3de;
  --social-tooltip: #1a1a2e;

  --font-display: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-body: 'Open Sans', 'Helvetica Neue', Arial, sans-serif;

  --container: 1120px;
  --gutter: clamp(20px, 4vw, 40px);
  --sp-1: 8px;
  --sp-2: 16px;
  --sp-3: 24px;
  --sp-4: 40px;
  --sp-5: 64px;
  --sp-6: 96px;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --shadow-sm: 0 1px 2px rgba(21, 21, 21, 0.06);
  --shadow-md: 0 12px 32px rgba(21, 21, 21, 0.12);
}

/* ---------- Reset & base ---------- */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
ul { margin: 0; padding: 0; list-style: none; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--ink);
  line-height: 1.15;
  margin: 0 0 var(--sp-3);
  text-wrap: balance;
}

h1 { font-size: 36px; font-weight: 400; letter-spacing: -0.01em; }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); }

p { margin: 0 0 var(--sp-3); }
p:last-child { margin-bottom: 0; }

:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 3px;
  border-radius: 2px;
}

::selection { background: var(--ink); color: var(--paper); }

/* Skip link */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: var(--ink);
  color: var(--paper);
  padding: 10px 18px;
  text-decoration: none;
}
.skip-link:focus { left: 0; }

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: var(--sp-5); }
.section--tint { background: var(--mist); }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-3);
  padding-block: 18px;
}

.wordmark {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ink);
  text-decoration: none;
  border: 1.5px solid var(--ink);
  padding: 6px 18px 8px;
  line-height: 1;
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}
.wordmark:hover { background: var(--ink); color: var(--paper); }

.main-nav ul {
  display: flex;
  gap: clamp(18px, 3vw, 40px);
}
.main-nav a {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--muted);
  padding-block: 6px;
  border-bottom: 2px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.main-nav a:hover { color: var(--ink); }
.main-nav a[aria-current="page"] {
  color: var(--ink);
  border-bottom-color: var(--ink);
}

/* Mobile nav */
.nav-toggle {
  display: none;
  border: 0;
  background: none;
  cursor: pointer;
  width: 48px;
  height: 48px;
  padding: 10px;
  color: var(--ink);
}
.nav-toggle svg { display: block; width: 28px; height: 28px; }
.nav-toggle[aria-expanded="true"] .bar-1 { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .bar-2 { opacity: 0; }
.nav-toggle[aria-expanded="true"] .bar-3 { transform: translateY(-6px) rotate(-45deg); }
.nav-toggle .bar {
  display: block;
  height: 2px;
  background: currentColor;
  margin: 4px 0;
  transition: transform 0.25s var(--ease), opacity 0.2s var(--ease);
}

.drawer {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 60;
  background: rgba(21, 21, 21, 0.45);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s var(--ease), visibility 0.25s;
}
.drawer.is-open { opacity: 1; visibility: visible; }
.drawer-panel {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: min(300px, 84vw);
  background: var(--paper);
  box-shadow: var(--shadow-md);
  transform: translateX(-100%);
  transition: transform 0.3s var(--ease);
  display: flex;
  flex-direction: column;
}
.drawer.is-open .drawer-panel { transform: translateX(0); }
.drawer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px var(--gutter);
  border-bottom: 1px solid var(--line);
}
.drawer-close {
  border: 0;
  background: none;
  cursor: pointer;
  font-size: 1.6rem;
  line-height: 1;
  padding: 4px 8px;
  color: var(--ink);
}
.drawer nav { padding: var(--sp-3) var(--gutter); }
.drawer nav a {
  display: block;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--muted);
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  transition: color 0.2s var(--ease), padding-left 0.2s var(--ease);
}
.drawer nav a:hover { color: var(--ink); padding-left: 6px; }
.drawer nav a[aria-current="page"] { color: var(--ink); }
.drawer-foot {
  margin-top: auto;
  padding: var(--sp-3) var(--gutter);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--faint);
}

/* ---------- Hero (home) ---------- */
.hero {
  padding-block: clamp(48px, 8vw, 96px);
  background: var(--mist);
  border-bottom: 1px solid var(--line);
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(260px, 38%) 1fr;
  gap: clamp(32px, 6vw, 72px);
  align-items: center;
}
.hero-figure { position: relative; }
.hero-figure::before {
  content: "";
  position: absolute;
  inset: 18px -18px -18px 18px;
  border: 1px solid rgba(21, 21, 21, 0.25);
  z-index: 0;
}
.hero-figure img {
  position: relative;
  z-index: 1;
  width: 100%;
  box-shadow: var(--shadow-md);
}
.hero-eyebrow {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--faint);
  margin-bottom: var(--sp-2);
}
.hero h1 { margin-bottom: var(--sp-2); }
.hero .hero-lede {
  max-width: 52ch;
  font-size: 1.05rem;
  color: var(--muted);
}

/* ---------- Content sections ---------- */
.prose {
  max-width: 72ch;
  font-size: 1.02rem;
  color: var(--ink-soft);
}
.prose strong { font-weight: 700; color: var(--ink); }

/* Home page intro column */
.home-intro { max-width: 805px; }
.home-welcome { padding-top: 8px; }

.split {
  display: grid;
  grid-template-columns: minmax(240px, 38%) 1fr;
  gap: clamp(32px, 6vw, 72px);
  align-items: start;
}
.split-figure img {
  width: 100%;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--line);
}
.split-figure {
  position: sticky;
  top: 110px;
}
.page-head {
  max-width: 46rem;
  margin-inline: auto;
  text-align: center;
  padding-block: clamp(40px, 6vw, 72px) var(--sp-4);
}
.page-head h1 { margin-bottom: var(--sp-2); }
.page-head p {
  color: var(--muted);
  max-width: 40rem;
  margin-inline: auto;
}

/* ---------- News list ---------- */
.news-list {
  max-width: 46rem;
  margin-inline: auto;
  padding-bottom: var(--sp-5);
}
.news-list li { border-bottom: 1px solid var(--line); }
.news-list a {
  display: flex;
  gap: var(--sp-2);
  align-items: baseline;
  padding: 12px 4px;
  text-decoration: none;
  color: var(--ink-soft);
  font-size: 1.02rem;
  transition: color 0.2s var(--ease), padding-left 0.2s var(--ease);
}
.news-list a::before {
  content: "→";
  flex: none;
  font-size: 0.9em;
  color: var(--faint);
  transition: color 0.2s var(--ease), transform 0.2s var(--ease);
}
.news-list a:hover { color: var(--ink); padding-left: 12px; }
.news-list a:hover::before { color: var(--ink); transform: translateX(3px); }

/* ---------- Contact form ---------- */
.contact-form-wrap {
  max-width: 30rem;
  margin-inline: auto;
  padding-bottom: var(--sp-5);
}
.form-field { margin-bottom: var(--sp-2); }
.form-field input,
.form-field textarea {
  width: 100%;
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 0;
  padding: 14px 16px;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--ink);
  box-shadow: 0 0 0 1px var(--ink);
}
.form-field textarea { resize: vertical; min-height: 140px; }
.form-field input::placeholder,
.form-field textarea::placeholder { color: var(--faint); }
.form-field label { font-weight: 600; font-size: 0.85rem; color: var(--muted); }

.form-actions { margin-top: var(--sp-3); }
.btn {
  display: inline-block;
  width: 100%;
  border: 0;
  cursor: pointer;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  padding: 16px 24px;
  transition: background 0.2s var(--ease), transform 0.15s var(--ease);
}
.btn:hover { background: var(--ink-soft); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.55; cursor: default; }

.form-status {
  display: none;
  margin-top: var(--sp-2);
  padding: 12px 16px;
  font-size: 0.9rem;
  text-align: center;
  border-radius: 2px;
}
.form-status.is-visible { display: block; }
.form-status--ok { background: rgba(22, 163, 74, 0.12); color: #15803d; }
.form-status--err { background: rgba(220, 38, 38, 0.10); color: #b91c1c; }

.recaptcha-note {
  margin-top: var(--sp-2);
  font-size: 0.78rem;
  color: var(--faint);
  text-align: center;
}
.recaptcha-note a { color: var(--muted); text-decoration: underline; text-underline-offset: 2px; }
.recaptcha-note a:hover { color: var(--ink); }

/* ---------- Social row ---------- */
.social-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  padding-block: var(--sp-4) var(--sp-5);
}
.social-btn {
  position: relative;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  color: #fff;
  display: grid;
  place-items: center;
  line-height: normal;
  text-decoration: none;
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.social-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.18);
}
.social-btn i,
.social-btn svg { width: 18px; height: 18px; }
.social-btn::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(-4px);
  margin-bottom: 6px;
  padding: 4px 10px;
  background: var(--social-tooltip);
  color: #fff;
  font-size: 12.5px;
  white-space: nowrap;
  border-radius: 5px;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.18s var(--ease), transform 0.18s var(--ease);
}
.social-btn::before {
  content: "";
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(-2px);
  border: 5px solid transparent;
  border-top-color: var(--social-tooltip);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.18s var(--ease), transform 0.18s var(--ease);
}
.social-btn:hover::after,
.social-btn:hover::before { opacity: 1; visibility: visible; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  padding-block: var(--sp-3);
  text-align: center;
}
.site-footer p {
  margin: 0;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--faint);
}

/* ---------- 404 ---------- */
.not-found {
  min-height: 60vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding-block: var(--sp-6);
}
.not-found code { font-size: 0.9rem; color: var(--faint); }
.not-found .back-home {
  display: inline-block;
  margin-top: var(--sp-2);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.85rem;
  color: var(--ink);
  text-underline-offset: 4px;
}

/* ---------- Responsive ---------- */
@media (max-width: 767px) {
  .main-nav { display: none; }
  .nav-toggle { display: block; }
  .drawer { display: block; }

  .header-inner {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
  }
  .wordmark { grid-column: 2; justify-self: center; }
  .nav-toggle { grid-column: 3; justify-self: end; }

  .site-footer p { font-size: 0.6rem; }

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

  h1 { font-size: 26px; }
  .home-intro h2 { text-align: center; }

  .hero-figure img { max-width: 320px; margin-inline: auto; }
  .hero-figure::before { display: none; }
  .hero { text-align: center; }
  .hero .hero-lede { margin-inline: auto; }

  .split-figure { position: static; }
  .split-figure img { max-width: 320px; margin-inline: auto; }

  .page-head,
  .contact-form-wrap {
    padding-inline: var(--gutter);
  }

  .social-links { gap: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}