/* ============================================================
   GLOBAL CSS — AI Tax Advisors
   Shared across all pages (homepage + all Thailand pages)
   ============================================================ */

/* ── FONTS ── */
@font-face {
  font-family: 'Libre Baskerville';
  src: url(../fonts/LibreBaskerville-VariableFont_wght_a7872e_a7872e_a7872e.ttf) format('truetype-variations');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Libre Baskerville';
  src: url(../fonts/LibreBaskerville-Italic-VariableFont_wght_a7872e_a7872e_a7872e.ttf) format('truetype-variations');
  font-weight: 100 900;
  font-style: italic;
  font-display: swap;
}
@font-face {
  font-family: 'Inter';
  src: url(../fonts/Inter-VariableFont_opsz,wght_a7872e_a7872e_a7872e.ttf) format('truetype-variations');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Inter';
  src: url(../fonts/Inter-Italic-VariableFont_opsz,wght_a7872e_a7872e_a7872e.ttf) format('truetype-variations');
  font-weight: 100 900;
  font-style: italic;
  font-display: swap;
}

/* ── ROOT ── */
:root {
  --navy:      #1a0f33;
  --navy-mid:  #2d1b52;
  --navy-card: #3d2762;
  --navy-deep: #0d0618;
  --blue:      #005895;
  --blue-light:#1a6faa;
  --red:       #e61f32;
  --purple:    #3d2456;
  --purple-mid: #4a2f66;
  --white:     #ffffff;
  --platinum:  #E5E4E2;
  --silver:    rgba(229,228,226,0.75);
  --muted:     rgba(229,228,226,0.4);
  --faint:     rgba(229,228,226,0.08);
  --border:    rgba(229,228,226,0.1);
  --border-blue: rgba(0,88,149,0.35);
  --font-serif: 'Libre Baskerville', Georgia, serif;
  --font-sans:  'Inter', system-ui, sans-serif;
  --nav-h: 76px;
  --max-w: 1140px;
}

/* ── RESET ── */
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior: auto; }

body {
  background: var(--navy);
  color: var(--platinum);
  font-family: var(--font-sans);
  overflow-x: hidden;
  line-height: 1.65;
}

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

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2.5rem;
}

/* ── PRELOADER ── */
#preloader {
  position: fixed;
  inset: 0;
  background: var(--navy-deep);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
}

.pl-logo {
  width: 72px;
  opacity: 0;
  transform: scale(0.9);
  animation: pl-logo-in 0.5s 0.2s ease forwards;
}

@keyframes pl-logo-in {
  to { opacity: 1; transform: scale(1); }
}

.pl-bar {
  width: 140px;
  height: 1px;
  background: var(--faint);
  position: relative;
  overflow: hidden;
}

.pl-bar::after {
  content: '';
  position: absolute;
  inset: 0;
  left: -100%;
  background: linear-gradient(90deg, transparent, var(--blue), var(--platinum), var(--blue), transparent);
  animation: pl-sweep 1.1s 0.4s ease forwards;
}

@keyframes pl-sweep { to { left: 100%; } }

/* ── NAVIGATION ── */
#nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 800;
  display: flex;
  align-items: center;
  padding: 0 2.5rem;
  transition: background 0.4s, border-color 0.4s, backdrop-filter 0.4s;
  border-bottom: 1px solid transparent;
}

#nav.scrolled {
  background: rgba(7,14,30,0.94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-color: var(--border);
}

.nav-inner {
  max-width: var(--max-w);
  width: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo img {
  height: 42px;
  width: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.78rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--silver);
  transition: color 0.2s;
}

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

.nav-cta {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--white);
  background: var(--blue);
  border: none;
  padding: 0.6rem 1.4rem;
  border-radius: 3px;
  cursor: pointer;
  transition: background 0.25s, transform 0.2s;
}

.nav-cta:hover { background: var(--blue-light); }

/* ── NAV DROPDOWN ── */
.nav-dropdown {
  position: relative;
}

.nav-dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--navy-mid);
  border: 1px solid var(--border);
  border-radius: 4px;
  min-width: 200px;
  z-index: 1000;
  margin-top: 0.5rem;
}

.nav-dropdown-menu.open {
  display: block;
}

.nav-dropdown-menu a {
  display: block;
  padding: 0.8rem 1.2rem;
  color: var(--silver);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
  transition: color 0.2s;
  font-size: 0.85rem;
}

.nav-dropdown-menu a:last-child {
  border-bottom: none;
}

.nav-dropdown-menu a:hover {
  color: var(--white);
}

@media (max-width: 768px) {
  .nav-dropdown-menu {
    position: static;
    background: var(--navy-dark);
    border: none;
  }
}

/* ── NAV BURGER + MOBILE MENU ── */
.nav-burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}

.nav-burger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--silver);
  transition: transform 0.25s, opacity 0.25s;
}

.nav-burger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-burger.open span:nth-child(2) { opacity: 0; }
.nav-burger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

.nav-mobile-menu {
  display: none !important;
  visibility: hidden;
  position: fixed;
  top: var(--nav-h);
  left: 0;
  right: 0;
  background: rgba(7,14,30,0.97);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  padding: 1.5rem 1.25rem 2rem;
  z-index: 799;
  flex-direction: column;
  gap: 0;
}

.nav-mobile-menu.open { display: flex !important; visibility: visible; }

.nav-mobile-menu a {
  font-size: 0.88rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--silver);
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
  display: block;
  transition: color 0.2s;
}

.nav-mobile-menu a:last-child { border-bottom: none; }
.nav-mobile-menu a:hover { color: var(--white); }

@media (max-width: 1024px) {
  .nav-burger { display: flex; }
  .nav-links { display: none; }
  .nav-mobile-menu { display: none !important; }
  #nav { padding: 0 1.5rem; }
}

/* ── BUTTONS ── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--white);
  background: var(--blue);
  border: 1px solid var(--blue);
  padding: 0.95rem 2rem;
  border-radius: 3px;
  cursor: pointer;
  transition: background 0.25s, box-shadow 0.25s, transform 0.2s;
  position: relative;
}

.btn-primary:hover {
  background: var(--blue-light);
  box-shadow: 0 8px 32px rgba(0,88,149,0.4);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  color: var(--silver);
  background: transparent;
  border: 1px solid var(--border);
  padding: 0.95rem 1.75rem;
  border-radius: 3px;
  cursor: pointer;
  transition: border-color 0.25s, color 0.25s;
}

.btn-secondary:hover {
  border-color: rgba(229,228,226,0.3);
  color: var(--white);
}

.btn-arrow {
  width: 13px;
  height: 13px;
  transition: transform 0.2s;
}

.btn-primary:hover .btn-arrow,
.btn-secondary:hover .btn-arrow {
  transform: translateX(3px);
}

.btn-obsidian {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--white);
  background: transparent;
  border: 1px solid rgba(229,228,226,0.25);
  padding: 1.1rem 2.5rem;
  border-radius: 3px;
  cursor: pointer;
  animation: breathe 3.5s ease-in-out infinite;
  transition: border-color 0.3s, background 0.3s;
}

.btn-obsidian:hover {
  border-color: rgba(229,228,226,0.5);
  background: rgba(229,228,226,0.05);
}

@keyframes breathe {
  0%, 100% { box-shadow: 0 0 18px rgba(229,228,226,0.04), 0 0 50px rgba(229,228,226,0.015); }
  50%       { box-shadow: 0 0 30px rgba(229,228,226,0.1),  0 0 80px rgba(229,228,226,0.04); }
}

/* ── UTILITIES ── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
}

.s-eyebrow {
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--blue-light);
  margin-bottom: 0.9rem;
}

.s-title {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--white);
  margin-bottom: 1.1rem;
}

.s-body {
  font-size: 1rem;
  font-weight: 300;
  line-height: 1.8;
  color: var(--silver);
}

/* ── FOOTER (SIMPLE) ── */
#footer {
  background: var(--navy-deep);
  border-top: 1px solid var(--border);
  padding: 0;
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}

.footer-logo img {
  height: 32px;
  width: auto;
  opacity: 0.7;
}

.footer-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.footer-links a {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  transition: color 0.2s;
}

.footer-links a:hover { color: var(--silver); }

.footer-right {
  font-size: 0.75rem;
  color: var(--muted);
  letter-spacing: 0.06em;
  text-align: right;
}

/* ── FOOTER (EXPANDED) ── */
.footer-top {
  background: var(--navy-deep);
  padding: 4rem 2.5rem;
}

.footer-top-inner {
  display: grid;
  grid-template-columns: 1.4fr 1.4fr 1.2fr 1fr;
  gap: 3rem;
}

.footer-col {}

.footer-logo-img {
  height: 36px;
  width: auto;
  margin-bottom: 0.75rem;
}

.footer-irs-badge {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  color: var(--silver);
  letter-spacing: 0.06em;
  margin-top: 0.75rem;
}

.footer-irs-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 5px rgba(34,197,94,0.5);
  flex-shrink: 0;
}

.footer-col-title {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--silver);
  margin-bottom: 1.1rem;
}

.footer-address {
  font-size: 0.75rem;
  font-weight: 300;
  line-height: 1.7;
  color: var(--silver);
  margin-bottom: 0.75rem;
}

.footer-contact {
  font-size: 0.75rem;
  font-weight: 300;
  line-height: 1.8;
  color: var(--silver);
  margin-bottom: 0.5rem;
}

.footer-contact a {
  color: var(--silver);
  transition: color 0.2s;
}

.footer-contact a:hover { color: var(--white); }

.footer-hours {
  font-size: 0.75rem;
  color: var(--silver);
  letter-spacing: 0.04em;
}

.footer-offices-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.4rem 0.75rem;
}

.footer-offices-grid span {
  font-size: 0.75rem;
  font-weight: 300;
  color: var(--silver);
}

.footer-nav {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  margin-bottom: 1.5rem;
}

.footer-nav a {
  font-size: 0.75rem;
  font-weight: 300;
  color: var(--silver);
  transition: color 0.2s;
  letter-spacing: 0.03em;
}

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

.footer-social {
  display: flex;
  gap: 1rem;
}

.footer-social-link {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  transition: color 0.2s;
}

.footer-social-link:hover { color: var(--silver); }

.footer-bottom {
  background: #040a18;
  padding: 1.25rem 2.5rem;
  width: 100vw;
  position: relative;
  left: 50%;
  right: 50%;
  margin-left: -50vw;
  margin-right: -50vw;
}

.footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--muted);
  letter-spacing: 0.05em;
}

/* ── RESPONSIVE: TABLET (max-width: 1024px) ── */
@media (max-width: 1024px) {
  .footer-top-inner { grid-template-columns: 1fr 1fr; gap: 2rem; }
  .footer-bottom-inner { flex-direction: column; gap: 0.5rem; text-align: center; }
}

/* ── RESPONSIVE: MOBILE (max-width: 640px) ── */
@media (max-width: 640px) {
  :root { --nav-h: 64px; }

  .container { padding: 0 1.25rem; }

  #nav { padding: 0 1.25rem; }
  .nav-cta { font-size: 0.7rem; padding: 0.5rem 1rem; }

  .btn-primary, .btn-secondary { justify-content: center; width: 100%; }

  .s-title { font-size: clamp(1.6rem, 6.5vw, 2rem); }

  .footer-top { padding: 3rem 0; }
  .footer-top-inner { grid-template-columns: 1fr; gap: 2rem; }
  .footer-bottom-inner { flex-direction: column; gap: 0.4rem; font-size: 0.62rem; text-align: center; }
}