/* Danang Hotel Doctor — design system
   Palette taken from the brand concept deck: deep teal, warm gold, terracotta accent. */

:root {
  --dark: #0e3535;
  --dark-2: #123f3f;
  --teal: #1f8f86;
  --teal-light: #2fada2;
  --gold: #c99a4a;
  --gold-light: #e0b96f;
  --red: #a6342f;
  --cream: #f4f7f5;
  --white: #ffffff;
  --text: #17272a;
  --text-muted: #5b6b6a;
  --text-on-dark: #eaf3f0;
  --text-on-dark-muted: #a9c4bf;
  --border: #e1e8e5;
  --shadow: 0 10px 30px -12px rgba(14, 53, 53, 0.18);
  --radius: 14px;
  --container: 1120px;
  --font-serif: Georgia, "Noto Serif SC", "Nanum Myeongjo", "Malgun Gothic", "PT Serif", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
    "Noto Sans SC", "Malgun Gothic", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: hidden; }

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--text);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  color: var(--dark);
  line-height: 1.2;
  margin: 0 0 .5em;
  font-weight: 700;
}

p { margin: 0 0 1em; }
a { color: inherit; text-decoration: none; }
ul { margin: 0; padding: 0; list-style: none; }
button { font-family: inherit; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.section { padding: 88px 0; }
.section--tight { padding: 64px 0; }
.section--dark { background: var(--dark); color: var(--text-on-dark); }
.section--dark h1, .section--dark h2, .section--dark h3 { color: var(--white); }
.section--cream { background: var(--cream); }

.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 10px;
}
.section--dark .eyebrow { color: var(--gold-light); }

.section-head { max-width: 720px; margin-bottom: 48px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head h2 { font-size: clamp(28px, 4vw, 40px); }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(14, 53, 53, 0.96);
  backdrop-filter: saturate(140%) blur(6px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 16px;
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--white); }
.brand img { width: 38px; height: 38px; border-radius: 8px; }
.brand-name { font-family: var(--font-serif); font-weight: 700; font-size: 17px; line-height: 1.1; }
.brand-name small { display: block; font-family: var(--font-sans); font-weight: 500; font-size: 10px; letter-spacing: .12em; color: var(--gold-light); text-transform: uppercase; }

.nav { display: flex; align-items: center; gap: 28px; }
.nav a { color: var(--text-on-dark); font-size: 14.5px; font-weight: 500; opacity: .9; }
.nav a:hover { opacity: 1; color: var(--gold-light); }

.header-actions { display: flex; align-items: center; gap: 14px; }
.lang-switch { position: relative; }
.lang-switch summary {
  list-style: none;
  cursor: pointer;
  color: var(--text-on-dark);
  font-size: 14px;
  font-weight: 600;
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 999px;
  padding: 7px 14px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.lang-switch summary::-webkit-details-marker { display: none; }
.lang-switch[open] summary { border-color: var(--gold-light); }
.lang-menu {
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  background: var(--white);
  border-radius: 10px;
  box-shadow: var(--shadow);
  padding: 6px;
  min-width: 160px;
}
.lang-menu a {
  display: block;
  padding: 9px 12px;
  border-radius: 7px;
  color: var(--text);
  font-size: 14px;
}
.lang-menu a:hover { background: var(--cream); }
.lang-menu a.active { color: var(--teal); font-weight: 700; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 999px;
  padding: 12px 24px;
  font-weight: 700;
  font-size: 14.5px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn--primary { background: var(--gold); color: var(--dark); }
.btn--primary:hover { background: var(--gold-light); }
.btn--outline { background: transparent; border-color: rgba(255,255,255,0.35); color: var(--white); }
.btn--outline:hover { border-color: var(--gold-light); color: var(--gold-light); }
.btn--dark { background: var(--dark); color: var(--white); }
.btn--dark:hover { background: var(--dark-2); }
.btn--block { width: 100%; }
.btn--sm { padding: 9px 16px; font-size: 13.5px; }

.menu-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--white);
  width: 40px;
  height: 40px;
  border-radius: 8px;
  cursor: pointer;
}

/* ---------- Hero ---------- */
.hero {
  background: radial-gradient(120% 160% at 50% 0%, var(--dark-2) 0%, var(--dark) 60%);
  color: var(--white);
  text-align: center;
  padding: 72px 0 96px;
}
.hero-logo { width: min(230px, 62vw); height: auto; border-radius: 20px; margin: 0 auto 28px; box-shadow: var(--shadow); }
.hero h1 { font-size: clamp(34px, 6vw, 58px); letter-spacing: .01em; color: var(--white); margin-bottom: 6px; }
.hero .hero-kicker { color: var(--gold-light); letter-spacing: .18em; text-transform: uppercase; font-weight: 700; font-size: clamp(13px,1.6vw,16px); margin-bottom: 18px; }
.hero .hero-tagline { font-style: italic; color: var(--text-on-dark-muted); font-size: clamp(16px, 2vw, 19px); margin-bottom: 28px; }
.hero-desc { max-width: 640px; margin: 0 auto 34px; color: var(--text-on-dark); font-size: 17px; }
.hero-ctas { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-bottom: 52px; }
.hero-badges { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; max-width: 720px; margin: 0 auto; }
.hero-badge { background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.1); border-radius: var(--radius); padding: 20px 12px; }
.hero-badge strong { display: block; font-family: var(--font-serif); font-size: clamp(22px,3vw,30px); color: var(--gold-light); }
.hero-badge span { font-size: 13px; color: var(--text-on-dark-muted); }

/* ---------- Cards / grids ---------- */
.grid { display: grid; gap: 24px; }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.grid--6 { grid-template-columns: repeat(6, 1fr); }
/* Keeps a short row of cards centred instead of hugging the left edge. */
.grid--center { justify-content: center; }
.grid--1 { grid-template-columns: minmax(0, 380px); }
.grid--2.grid--center { grid-template-columns: repeat(2, minmax(0, 380px)); }

.card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
}
.card--flat { box-shadow: none; }

.value-card { text-align: center; }
.value-badge {
  width: 64px; height: 64px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-serif); font-weight: 700; font-size: 24px; color: var(--white);
  margin: 0 auto 18px;
}

.service-card { display: flex; align-items: flex-start; gap: 16px; }
.service-icon {
  flex: none; width: 52px; height: 52px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 13px; color: var(--white);
}
.service-card h3 { font-size: 17px; margin: 8px 0 0; }

.detail-block { padding: 40px 0; border-top: 1px solid var(--border); }
.detail-block:first-of-type { border-top: none; }
.detail-tag { color: var(--gold); font-weight: 700; letter-spacing: .1em; text-transform: uppercase; font-size: 12.5px; }
.detail-points { margin-top: 22px; display: grid; gap: 16px; }
.detail-point { display: flex; gap: 14px; align-items: flex-start; }
.detail-dot { flex: none; width: 10px; height: 10px; border-radius: 50%; margin-top: 7px; }
.detail-note {
  margin-top: 24px; background: var(--cream); border-radius: 10px;
  padding: 18px 22px; font-style: italic; color: var(--dark-2);
}

.step-card { border-radius: var(--radius); padding: 28px 22px; color: var(--white); }
.step-num { font-family: var(--font-serif); font-size: 34px; color: var(--gold-light); margin-bottom: 14px; }
.step-card h3 { color: var(--white); font-size: 18px; }
.step-card p { color: var(--text-on-dark-muted); font-size: 14.5px; margin-bottom: 0; }

.area-card { display: flex; align-items: center; gap: 14px; padding: 20px 22px; }
.area-icon { width: 40px; height: 40px; border-radius: 50%; background: var(--cream); color: var(--teal); display: flex; align-items: center; justify-content: center; flex: none; }
.area-card span { font-weight: 700; color: var(--dark); }
.coverage-cta { background: var(--dark); color: var(--white); border-radius: var(--radius); padding: 28px; }
.coverage-cta h3 { color: var(--white); }
.coverage-cta p { color: var(--text-on-dark-muted); margin-bottom: 0; }

.lang-pill { display: inline-block; background: var(--cream); color: var(--dark); font-weight: 700; font-size: 13.5px; padding: 8px 16px; border-radius: 999px; margin: 0 8px 8px 0; }
.check-list li { display: flex; gap: 12px; align-items: flex-start; padding: 12px 0; border-bottom: 1px solid var(--border); }
.check-list li:last-child { border-bottom: none; }
.check-badge { flex: none; width: 26px; height: 26px; border-radius: 50%; background: var(--gold); color: var(--white); display: flex; align-items: center; justify-content: center; font-size: 13px; font-weight: 700; }

.stat-card { text-align: center; padding: 30px 16px; }
.stat-card strong { display: block; font-family: var(--font-serif); font-size: clamp(26px,3.4vw,34px); color: var(--gold-light); margin-bottom: 6px; }
.stat-card span { font-size: 13.5px; color: var(--text-on-dark-muted); }

.stars { color: var(--gold); letter-spacing: 2px; margin-bottom: 14px; font-size: 15px; }
.testimonial-quote { font-style: italic; color: var(--text); margin-bottom: 18px; }
.testimonial-author { font-weight: 700; color: var(--teal); font-size: 14px; }

.price-card { display: flex; flex-direction: column; }
.price-card h3 { font-size: 20px; }
.price-card p { color: var(--text-muted); flex: 1; }
.price-card.featured { background: var(--dark); color: var(--white); }
.price-card.featured h3, .price-card.featured p { color: var(--white); }
.price-card.featured p { color: var(--text-on-dark-muted); }

.b2b-item { display: flex; gap: 16px; align-items: flex-start; }
.b2b-icon { flex: none; width: 46px; height: 46px; border-radius: 50%; background: var(--gold); color: var(--white); display: flex; align-items: center; justify-content: center; font-size: 16px; }
.b2b-item h3 { font-size: 16.5px; margin-bottom: 4px; }
.b2b-item p { color: var(--text-muted); margin: 0; font-size: 14.5px; }

.faq-item { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px 26px; margin-bottom: 16px; }
.faq-item summary { cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 16px; font-weight: 700; color: var(--dark); font-size: 16px; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; font-size: 22px; color: var(--gold); flex: none; }
.faq-item[open] summary::after { content: "\2212"; }
.faq-item p { margin: 14px 0 0; color: var(--text-muted); }

.final-cta { text-align: center; padding: 96px 0; }
.final-cta img { width: min(190px, 56vw); height: auto; margin: 0 auto 26px; border-radius: 18px; }
.final-cta h2 { color: var(--white); font-size: clamp(26px,4vw,38px); }
.final-cta .hero-tagline { margin-bottom: 30px; }
.final-cta .btn { margin: 0 auto; }
.cta-stack { display: flex; flex-direction: column; gap: 14px; max-width: 360px; margin: 0 auto 22px; }
.availability { color: var(--text-on-dark-muted); font-size: 14px; }

.site-footer { background: var(--dark-2); color: var(--text-on-dark-muted); padding: 48px 0 24px; font-size: 14px; }
.footer-top { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 24px; padding-bottom: 28px; border-bottom: 1px solid rgba(255,255,255,0.1); margin-bottom: 20px; }
.footer-links { display: flex; gap: 22px; flex-wrap: wrap; }
.footer-links a:hover { color: var(--gold-light); }
.footer-bottom { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }

.whatsapp-fab {
  position: fixed; right: 20px; bottom: 20px; z-index: 90;
  background: var(--gold); color: var(--dark); border-radius: 999px;
  padding: 14px 20px; font-weight: 700; font-size: 14px;
  box-shadow: 0 10px 24px -6px rgba(0,0,0,0.4);
  display: flex; align-items: center; gap: 8px;
}
.whatsapp-fab:hover { background: var(--gold-light); }

.skip-link {
  position: absolute; left: -999px; top: 0; background: var(--gold); color: var(--dark);
  padding: 10px 16px; z-index: 200; border-radius: 0 0 8px 0; font-weight: 700;
}
.skip-link:focus { left: 0; }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .grid--6 { grid-template-columns: repeat(3, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 760px) {
  .nav { position: fixed; inset: 72px 0 0 0; width: 100%; background: var(--dark); flex-direction: column; align-items: flex-start; padding: 24px; gap: 4px; opacity: 0; visibility: hidden; transition: opacity .2s ease; overflow-y: auto; }
  .nav.open { opacity: 1; visibility: visible; }
  .nav a { padding: 14px 4px; width: 100%; border-bottom: 1px solid rgba(255,255,255,0.08); }
  .menu-toggle { display: block; }
  .header-actions .btn--sm.header-cta { display: none; }
  .section { padding: 64px 0; }
  .grid--2, .grid--3, .grid--4, .grid--6 { grid-template-columns: 1fr; }
  .grid--1, .grid--2.grid--center { grid-template-columns: 1fr; }
  .hero-badges { grid-template-columns: 1fr; }
  .footer-top, .footer-bottom { flex-direction: column; }
}

@media (min-width: 761px) {
  .whatsapp-fab { display: none; }
}