/* =========================================================
   Totally Hanoi — design tokens & base styles
   Palette pulled from the Totally Hanoi logo:
   gold (Totally / lotus), deep teal (Hanoi / ink), vermilion (Huc bridge)
   ========================================================= */
:root{
  --gold: #E69A2C;
  --gold-deep: #C97F1B;
  --teal: #0B4A3E;
  --teal-deep: #073329;
  --teal-tint: #E7F1EE;
  --vermilion: #D9531E;
  --lotus-green: #4E8C46;
  --cream: #FBF6EC;
  --paper: #FFFFFF;
  --ink: #1D2A24;
  --ink-soft: #4B5B54;
  --line: #E4DCC9;

  --serif: "Fraunces", "Iowan Old Style", "Georgia", serif;
  --sans: "Work Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 12px 28px -14px rgba(7,51,41,.28);
  --container: 1140px;
}

*,*::before,*::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  font-family: var(--sans);
  background: var(--cream);
  color: var(--ink);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img{ max-width:100%; display:block; }
a{ color: var(--teal); text-decoration: none; }
a:hover{ color: var(--vermilion); }
h1,h2,h3,h4{
  font-family: var(--serif);
  color: var(--teal-deep);
  line-height: 1.15;
  margin: 0 0 .5em;
  font-weight: 600;
}
h1{ font-size: clamp(2.1rem, 4vw, 3.1rem); font-weight: 700; }
h2{ font-size: clamp(1.5rem, 2.6vw, 2.1rem); }
h3{ font-size: 1.28rem; }
p{ margin: 0 0 1.1em; }
ul, ol{ padding-left: 1.25em; }
.container{ max-width: var(--container); margin: 0 auto; padding: 0 24px; }
:focus-visible{ outline: 3px solid var(--vermilion); outline-offset: 2px; }
@media (prefers-reduced-motion: reduce){ *{ animation: none !important; transition: none !important; scroll-behavior: auto !important; } }

/* Skip link */
.skip-link{
  position:absolute; left:-999px; top:auto;
  background:var(--teal); color:#fff; padding:.75em 1.2em; border-radius: var(--radius-sm); z-index:999;
}
.skip-link:focus{ left: 16px; top: 16px; }

/* =========================== Header =========================== */
.site-header{
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  position: sticky; top:0; z-index: 100;
}
.header-inner{
  display:flex; align-items:center; justify-content:space-between;
  padding: 14px 24px; gap: 18px;
}
.brand{ display:flex; align-items:center; gap:10px; }
.brand img{ height: 40px; width:auto; }
.main-nav{ display:flex; align-items:center; gap: 4px; }
.main-nav ul{ list-style:none; display:flex; gap: 2px; margin:0; padding:0; }
.main-nav a{
  display:inline-block; padding: 10px 14px; border-radius: var(--radius-sm);
  color: var(--teal-deep); font-weight: 600; font-size: .97rem;
}
.main-nav a:hover{ background: var(--teal-tint); color: var(--teal-deep); }
.nav-toggle{ display:none; background:none; border:1px solid var(--line); border-radius: var(--radius-sm); padding: 8px 10px; cursor:pointer; }
.header-right{ display:flex; align-items:center; gap: 10px; }

.lang-switch{ position:relative; }
.lang-switch summary{
  list-style:none; cursor:pointer; display:flex; align-items:center; gap:6px;
  padding: 8px 12px; border:1px solid var(--line); border-radius: 999px; font-weight:600; font-size:.9rem; color: var(--teal-deep);
}
.lang-switch summary::-webkit-details-marker{ display:none; }
.lang-menu{
  position:absolute; right:0; top: calc(100% + 8px); background:#fff; border:1px solid var(--line);
  border-radius: var(--radius-sm); box-shadow: var(--shadow); padding:8px; display:grid; grid-template-columns: 1fr 1fr; gap:2px; width: 300px; max-height: 340px; overflow:auto; z-index:50;
}
.lang-menu a{ padding:7px 10px; border-radius:6px; font-size:.9rem; }
.lang-menu a:hover{ background: var(--teal-tint); }
.lang-menu a.current{ color: var(--vermilion); font-weight:700; }

/* =========================== Buttons =========================== */
.btn{
  display:inline-flex; align-items:center; gap:8px; font-weight:700; font-size:.95rem;
  padding: 12px 22px; border-radius: 999px; border: 2px solid transparent; cursor:pointer;
}
.btn-primary{ background: var(--vermilion); color:#fff; }
.btn-primary:hover{ background:#B8451A; color:#fff; }
.btn-outline{ border-color: var(--paper); color: var(--paper); }
.btn-outline:hover{ background: rgba(255,255,255,.15); color:#fff; }
.btn-teal{ background: var(--teal); color:#fff; }
.btn-teal:hover{ background: var(--teal-deep); color:#fff; }

/* =========================== Hero =========================== */
.hero{
  position: relative; overflow:hidden;
  background: linear-gradient(180deg, var(--teal) 0%, var(--teal-deep) 100%);
  color: #fff; padding: 76px 0 96px;
}
.hero::after{
  content:""; position:absolute; left:0; right:0; bottom:-1px; height:64px;
  background: var(--cream);
  -webkit-mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1200 60' preserveAspectRatio='none'><path d='M0 30 Q150 0 300 30 T600 30 T900 30 T1200 30 V60 H0 Z'/></svg>") bottom / 100% 100% no-repeat;
  mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1200 60' preserveAspectRatio='none'><path d='M0 30 Q150 0 300 30 T600 30 T900 30 T1200 30 V60 H0 Z'/></svg>") bottom / 100% 100% no-repeat;
}
.hero .eyebrow{ color: var(--gold); text-transform:uppercase; letter-spacing:.14em; font-weight:700; font-size:.8rem; }
.hero h1{ color:#fff; max-width: 18ch; }
.hero p.lede{ max-width: 56ch; font-size:1.15rem; color: #DCEAE4; }
.hero-cta{ display:flex; flex-wrap:wrap; gap:12px; margin-top: 22px; }

.page-hero{ padding: 54px 0 78px; }
.page-hero h1{ color:#fff; max-width: 30ch; }
.breadcrumbs{ font-size:.85rem; color:#BFE0D5; margin-bottom: 14px; }
.breadcrumbs a{ color:#BFE0D5; }
.breadcrumbs a:hover{ color: var(--gold); }

/* =========================== Sections =========================== */
section{ padding: 56px 0; }
.section-head{ max-width: 62ch; margin-bottom: 32px; }
.eyebrow{ display:inline-block; color: var(--vermilion); font-weight:700; text-transform:uppercase; letter-spacing:.12em; font-size:.78rem; margin-bottom:.6em; }

/* Wave divider — signature element echoing the logo's river motif */
.wave-divider{ line-height:0; }
.wave-divider svg{ width:100%; height:48px; display:block; }

/* =========================== Cards / grids =========================== */
.grid{ display:grid; gap: 22px; }
.grid-3{ grid-template-columns: repeat(3, 1fr); }
.grid-4{ grid-template-columns: repeat(4, 1fr); }
.grid-2{ grid-template-columns: repeat(2, 1fr); }

.card{
  background: var(--paper); border-radius: var(--radius); border:1px solid var(--line);
  overflow:hidden; display:flex; flex-direction:column; transition: transform .18s ease, box-shadow .18s ease;
}
.card:hover{ transform: translateY(-4px); box-shadow: var(--shadow); }
.card-media{
  height: 150px; display:flex; align-items:center; justify-content:center; font-size: 2.4rem;
  background: linear-gradient(135deg, var(--teal-tint), #fff);
  color: var(--teal);
}
.card-body{ padding: 20px 20px 22px; flex:1; display:flex; flex-direction:column; }
.card-body .eyebrow{ margin-bottom:.4em; }
.card-body h3{ margin-bottom:.35em; }
.card-body p{ color: var(--ink-soft); font-size:.96rem; margin-bottom: 14px; }
.card-link{ margin-top:auto; font-weight:700; font-size:.92rem; }
.card-link::after{ content:" →"; }

.tag-row{ display:flex; flex-wrap:wrap; gap:8px; margin: 10px 0 0; }
.tag{
  font-size:.78rem; font-weight:700; background: var(--teal-tint); color: var(--teal-deep);
  padding: 5px 11px; border-radius: 999px;
}

/* Category strip on homepage */
.cat-strip{ background: var(--paper); }
.cat-item{
  text-align:center; padding: 26px 14px; border-radius: var(--radius); border:1px solid var(--line);
  background: var(--cream);
}
.cat-item .ic{ font-size: 2rem; margin-bottom: 10px; }
.cat-item h3{ font-size: 1.02rem; margin-bottom: 4px; }
.cat-item p{ font-size:.85rem; color: var(--ink-soft); margin:0; }

/* Article body */
.article-wrap{ background: var(--paper); }
.article{ max-width: 74ch; margin:0 auto; }
.article h2{ margin-top: 1.4em; }
.article h3{ margin-top: 1.2em; color: var(--teal); }
.article ul li, .article ol li{ margin-bottom:.4em; }
.callout{
  background: var(--teal-tint); border-left: 4px solid var(--teal); border-radius: var(--radius-sm);
  padding: 16px 20px; margin: 1.6em 0; font-size:.96rem;
}
.callout strong{ color: var(--teal-deep); }
.stat-row{ display:flex; flex-wrap:wrap; gap: 14px; margin: 1.4em 0; }
.stat{
  background: var(--cream); border:1px solid var(--line); border-radius: var(--radius-sm);
  padding: 12px 16px; min-width: 130px;
}
.stat .n{ font-family: var(--serif); font-weight:700; font-size:1.25rem; color: var(--teal-deep); display:block; }
.stat .l{ font-size:.78rem; color: var(--ink-soft); text-transform:uppercase; letter-spacing:.06em; }

.toc{
  background: var(--cream); border:1px solid var(--line); border-radius: var(--radius);
  padding: 18px 22px; margin: 1.6em 0; font-size:.95rem;
}
.toc h2{ font-size:1rem; margin-bottom:.5em; }
.toc ul{ margin:0; padding-left: 1.1em; }

.author-box{
  display:flex; gap:14px; align-items:flex-start; background: var(--cream); border:1px solid var(--line);
  border-radius: var(--radius); padding: 18px; margin-top: 2.4em;
}
.author-box .av{
  width:46px; height:46px; border-radius:50%; background: var(--teal); color:#fff; display:flex;
  align-items:center; justify-content:center; font-family: var(--serif); font-weight:700; flex:none;
}

/* Related / footer CTA band */
.cta-band{ background: var(--vermilion); color:#fff; text-align:center; padding: 54px 0; }
.cta-band h2{ color:#fff; }
.cta-band p{ color: #FBE3D6; max-width: 52ch; margin: 0 auto 22px; }

/* =========================== Footer =========================== */
.site-footer{ background: var(--teal-deep); color: #C9DED8; padding: 56px 0 26px; }
.footer-grid{ display:grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 30px; }
.site-footer h4{ color:#fff; font-size:.95rem; text-transform:uppercase; letter-spacing:.08em; margin-bottom:.9em; }
.site-footer a{ color: #C9DED8; }
.site-footer a:hover{ color: var(--gold); }
.site-footer ul{ list-style:none; padding:0; margin:0; display:grid; gap:8px; font-size:.92rem; }
.footer-brand img{ height:38px; margin-bottom: 12px; filter: brightness(0) invert(1); opacity:.92; }
.footer-brand p{ font-size:.88rem; color:#9FBBB2; max-width: 34ch; }
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12); margin-top: 40px; padding-top: 20px;
  display:flex; flex-wrap:wrap; gap:12px; justify-content:space-between; font-size:.82rem; color:#9FBBB2;
}
.footer-bottom a{ color:#9FBBB2; }

/* =========================== Misc pages =========================== */
.list-page ul{ list-style:none; padding:0; }
.simple-list li{
  border-bottom:1px solid var(--line); padding: 14px 0;
}
form.contact-form{ display:grid; gap:14px; max-width: 560px; }
form.contact-form label{ font-weight:700; font-size:.9rem; display:block; margin-bottom:5px; color: var(--teal-deep); }
form.contact-form input, form.contact-form textarea{
  width:100%; padding: 11px 13px; border:1px solid var(--line); border-radius: var(--radius-sm); font: inherit; background:#fff;
}
form.contact-form textarea{ min-height: 140px; resize: vertical; }

.blog-meta{ font-size:.85rem; color: var(--ink-soft); }

/* 404 */
.error-page{ text-align:center; padding: 100px 24px; }
.error-page .code{ font-family: var(--serif); font-size: 5rem; color: var(--gold); font-weight:700; }

/* =========================== Responsive =========================== */
@media (max-width: 980px){
  .grid-4{ grid-template-columns: repeat(2,1fr); }
  .grid-3{ grid-template-columns: repeat(2,1fr); }
  .footer-grid{ grid-template-columns: 1fr 1fr; }
}
@media (max-width: 760px){
  .main-nav{ display:none; }
  .nav-toggle{ display:inline-flex; }
  body.nav-open .main-nav{
    display:block; position:absolute; top:100%; left:0; right:0; background:#fff;
    border-bottom:1px solid var(--line); padding: 10px 20px 18px;
  }
  body.nav-open .main-nav ul{ flex-direction:column; }
  .grid-4, .grid-3, .grid-2{ grid-template-columns: 1fr; }
  .footer-grid{ grid-template-columns: 1fr 1fr; }
  .hero{ padding: 54px 0 84px; }
}