/* ==========================================================================
   Vietnam 2026 — design tokens
   Riso-print travel zine: flat inks on cream paper, hard borders,
   offset "sticker" shadows instead of blur/gradient, passport-stamp motifs.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Instrument+Serif:ital@0;1&family=Space+Grotesk:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;600;700&display=swap');

:root{
  --paper:#F7F0DE;
  --paper-2:#EEE3C4;
  --paper-3:#E4D6AC;

  --ink:#1C1912;
  --ink-soft:#5B5241;

  --red:#B8391F;
  --red-bright:#E2572E;
  --teal:#1F5C52;
  --teal-bright:#3E8E7E;
  --gold:#D89B2E;
  --gold-bright:#F0B93D;

  --on-dark:#F7F0DE;
  --on-dark-soft:#C9BFA4;

  --radius:6px;
  --radius-lg:10px;

  --border:2px solid var(--ink);
  --shadow-sm: 4px 4px 0 var(--ink);
  --shadow-lg: 8px 8px 0 var(--ink);

  --font-display:'Instrument Serif', serif;
  --font-head:'Space Grotesk', sans-serif;
  --font-body:'Space Grotesk', sans-serif;
  --font-mono:'JetBrains Mono', monospace;
}

*{ box-sizing:border-box; }

html{ scroll-behavior:smooth; }

body{
  margin:0;
  background:var(--paper);
  background-image:
    radial-gradient(var(--ink) 0.6px, transparent 0.6px);
  background-size:22px 22px;
  background-position:-11px -11px;
  background-attachment:fixed;
  color:var(--ink);
  font-family:var(--font-body);
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
}
/* dial the dot-grain right down — texture, not pattern */
body{ background-color:var(--paper); }
body::before{
  content:"";
  position:fixed; inset:0;
  background-image:radial-gradient(var(--ink) 0.5px, transparent 0.5px);
  background-size:22px 22px;
  opacity:0.035;
  pointer-events:none;
  z-index:0;
}

@media (prefers-reduced-motion: reduce){
  *{ animation-duration:0.001ms !important; animation-iteration-count:1 !important; transition-duration:0.001ms !important; scroll-behavior:auto !important; }
}

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

.wrap{
  max-width:1080px;
  margin:0 auto;
  padding:0 28px;
  position:relative;
  z-index:1;
}

/* ---------- nav ---------- */

.site-nav{
  position:sticky; top:0; z-index:50;
  background:var(--paper);
  border-bottom:var(--border);
}
.site-nav .wrap{
  display:flex; align-items:center; justify-content:space-between;
  flex-wrap:wrap;
  gap:10px 20px;
  padding-top:16px; padding-bottom:16px;
}
.nav-brand{
  font-family:var(--font-head);
  font-weight:700;
  font-size:1.05rem;
  letter-spacing:0.01em;
  text-decoration:none;
  color:var(--ink);
  display:flex; align-items:baseline; gap:10px;
}
.nav-brand .flight-code{
  font-family:var(--font-mono);
  font-size:0.66rem;
  color:var(--paper);
  background:var(--red);
  border:2px solid var(--ink);
  border-radius:4px;
  padding:2px 6px;
  letter-spacing:0.06em;
}
.nav-links{
  display:flex; gap:18px 26px; flex-wrap:wrap;
  list-style:none; margin:0; padding:0;
  font-family:var(--font-mono);
  font-size:0.76rem;
  letter-spacing:0.04em;
  text-transform:uppercase;
}
.nav-links a{
  text-decoration:none;
  color:var(--ink-soft);
  padding-bottom:4px;
  border-bottom:2px solid transparent;
  transition:color .15s ease, border-color .15s ease;
}
.nav-links a:hover, .nav-links a[aria-current="page"]{
  color:var(--ink);
  border-color:var(--red);
}
.nav-links a:focus-visible, a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible{
  outline:2px solid var(--red);
  outline-offset:3px;
}

/* ---------- section rhythm ---------- */

section{ padding:60px 0; }
.section-head{ margin-bottom:32px; position:relative; }
.eyebrow{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:0.7rem;
  letter-spacing:0.1em;
  text-transform:uppercase;
  color:var(--ink);
  background:var(--gold-bright);
  border:2px solid var(--ink);
  border-radius:3px;
  padding:2px 8px;
  transform:rotate(-1deg);
  margin:0 0 14px;
}
h1,h2,h3{ font-family:var(--font-head); margin:0; color:var(--ink); font-weight:600; }
.section-head h2{ font-size:clamp(1.7rem,3.2vw,2.4rem); }
.section-head p{ color:var(--ink-soft); max-width:56ch; margin:12px 0 0; }

/* ---------- boarding pass: HERO ticket ---------- */

.ticket{
  position:relative;
  background:var(--paper-2);
  color:var(--ink);
  border:var(--border);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-lg);
  overflow:hidden;
  display:grid;
  grid-template-columns: 1fr 220px;
  transform:rotate(-0.5deg);
}

.ticket-main{ padding:36px 40px; }
.ticket-stub{
  background:var(--ink);
  color:var(--paper);
  padding:36px 28px;
  display:flex; flex-direction:column; justify-content:space-between;
  position:relative;
}

/* perforation between main + stub */
.ticket-stub::before{
  content:"";
  position:absolute; left:0; top:0; bottom:0;
  width:0;
  border-left:2px dashed rgba(247,240,222,0.4);
}
.ticket-stub::after{
  content:"";
  position:absolute; left:-14px; top:-14px;
  width:28px; height:28px; border-radius:50%;
  background:var(--paper);
  border:2px solid var(--ink);
  box-shadow: 0 calc(100% - 14px) 0 -14px var(--paper), 0 calc(100% - 14px) 0 -14px var(--ink);
}

.ticket-route{
  font-family:var(--font-mono);
  font-size:0.75rem;
  letter-spacing:0.1em;
  text-transform:uppercase;
  color:var(--ink-soft);
  margin-bottom:6px;
}
.ticket-main h1{
  font-family:var(--font-display);
  font-weight:400;
  font-size:clamp(2.3rem,4.8vw,3.6rem);
  line-height:1.05;
}
.ticket-main h1 em{
  font-style:italic;
  color:var(--red);
}

.ticket-meta{
  display:grid;
  grid-template-columns:repeat(3,auto);
  gap:26px;
  margin-top:28px;
  padding-top:22px;
  border-top:2px dashed var(--ink);
  opacity:0.85;
}
.ticket-meta div span{ display:block; }
.ticket-meta .label{
  font-family:var(--font-mono);
  font-size:0.64rem;
  letter-spacing:0.1em;
  text-transform:uppercase;
  color:var(--ink-soft);
  margin-bottom:4px;
}
.ticket-meta .value{
  font-family:var(--font-mono);
  font-size:1rem;
  font-weight:600;
}

.ticket-stub .label{
  font-family:var(--font-mono);
  font-size:0.64rem;
  letter-spacing:0.1em;
  text-transform:uppercase;
  color:var(--gold-bright);
  margin-bottom:6px;
}
.ticket-stub .passengers{
  font-family:var(--font-mono);
  font-size:0.9rem;
  line-height:1.9;
}
.barcode{
  height:34px;
  margin-top:20px;
  background:repeating-linear-gradient(90deg, var(--paper) 0 2px, transparent 2px 5px, var(--paper) 5px 6px, transparent 6px 9px, var(--paper) 9px 12px, transparent 12px 13px);
  opacity:0.85;
}

@media (max-width:720px){
  .ticket{ grid-template-columns:1fr; transform:none; }
  .ticket-stub::before{ display:none; }
  .ticket-stub::after{ display:none; }
  .ticket-main{ padding:28px 24px; }
  .ticket-stub{ padding:24px; }
  .ticket-meta{ grid-template-columns:1fr 1fr; }
}

/* ---------- countdown ---------- */

.countdown{
  display:flex; gap:14px; flex-wrap:wrap;
  margin-top:28px;
}
.countdown .unit{
  background:var(--paper);
  border:2px solid var(--ink);
  border-radius:var(--radius);
  box-shadow:3px 3px 0 var(--ink);
  padding:14px 18px;
  min-width:80px;
  text-align:center;
}
.countdown .unit:nth-child(2){ background:var(--gold-bright); transform:rotate(-1.5deg); }
.countdown .unit:nth-child(3){ transform:rotate(1deg); }
.countdown .unit:nth-child(4){ background:var(--teal-bright); color:var(--paper); transform:rotate(-1deg); }
.countdown .unit:nth-child(4) .unit-label{ color:var(--paper); opacity:0.8; }
.countdown .num{
  font-family:var(--font-mono);
  font-size:1.8rem;
  font-weight:700;
  color:var(--ink);
  line-height:1;
}
.countdown .unit-label{
  font-family:var(--font-mono);
  font-size:0.6rem;
  letter-spacing:0.1em;
  text-transform:uppercase;
  color:var(--ink-soft);
  margin-top:6px;
}

/* ---------- stat block (reused inside budget summary) ---------- */

.stat .num{
  font-family:var(--font-display);
  font-size:2.4rem;
  font-weight:400;
  color:var(--gold-bright);
  line-height:1;
}
.stat .stat-label{
  font-family:var(--font-mono);
  font-size:0.68rem;
  letter-spacing:0.08em;
  text-transform:uppercase;
  color:var(--on-dark-soft);
  margin-top:6px;
}

/* ---------- route map (Leaflet) ---------- */

.route-map{
  background:var(--paper-2);
  border:var(--border);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-sm);
  padding:8px;
}
#trip-map{
  height:420px;
  border-radius:calc(var(--radius-lg) - 4px);
  border:2px solid var(--ink);
}
@media (max-width:640px){
  #trip-map{ height:320px; }
}

/* flat pin markers */
.trip-pin{
  position:relative;
  width:22px; height:22px;
  border:2px solid var(--ink);
  border-radius:4px;
  transform:rotate(45deg);
  box-shadow:2px 2px 0 var(--ink);
}
.trip-pin.hcm{ background:var(--red-bright); }
.trip-pin.ninhbinh{ background:var(--teal-bright); }
.trip-pin.hanoi{ background:var(--gold-bright); }
.trip-pin-num{
  position:absolute;
  top:50%; left:50%;
  transform:translate(-50%,-50%) rotate(-45deg);
  font-family:var(--font-mono);
  font-weight:700;
  font-size:0.62rem;
  line-height:1;
  color:var(--paper);
}
.trip-pin.hanoi .trip-pin-num{ color:var(--ink); }

/* permanent order labels */
.leaflet-tooltip.trip-label{
  background:var(--paper);
  border:2px solid var(--ink);
  border-radius:20px;
  box-shadow:2px 2px 0 var(--ink);
  padding:2px 10px;
  font-family:var(--font-mono);
  font-weight:600;
  font-size:0.68rem;
  color:var(--ink);
  white-space:nowrap;
}
.leaflet-tooltip.trip-label::before{ display:none; }

/* leaflet chrome, retheme to match flat/hard-border system */
.leaflet-container{
  font-family:var(--font-body);
  background:var(--paper-3);
}
.leaflet-popup-content-wrapper{
  background:var(--paper);
  color:var(--ink);
  border:2px solid var(--ink);
  border-radius:var(--radius);
  box-shadow:4px 4px 0 var(--ink);
}
.leaflet-popup-tip{
  background:var(--paper);
  border:2px solid var(--ink);
  box-shadow:none;
}
.leaflet-popup-content{ margin:12px 14px; font-size:0.85rem; }
.leaflet-popup-content .popup-city{
  font-family:var(--font-head);
  font-weight:700;
  font-size:0.98rem;
  margin:0 0 4px;
}
.leaflet-popup-content .popup-meta{
  font-family:var(--font-mono);
  font-size:0.68rem;
  color:var(--ink-soft);
  letter-spacing:0.02em;
}
.leaflet-popup-close-button{ color:var(--ink) !important; }
.leaflet-control-zoom a{
  background:var(--paper) !important;
  color:var(--ink) !important;
  border:2px solid var(--ink) !important;
}
.leaflet-control-attribution{
  background:rgba(247,240,222,0.85) !important;
  font-family:var(--font-mono);
  font-size:0.62rem !important;
}

/* ---------- link cards ---------- */

.card-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
  gap:22px;
}
.link-card{
  display:block;
  text-decoration:none;
  background:var(--paper-2);
  border:var(--border);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-sm);
  padding:28px;
  transition:transform .12s ease, box-shadow .12s ease;
}
.link-card:hover{
  transform:translate(-3px,-3px);
  box-shadow:7px 7px 0 var(--ink);
}
.link-card .eyebrow{ margin-bottom:16px; }
.link-card h3{ font-size:1.3rem; font-weight:700; color:var(--ink); margin-bottom:8px; }
.link-card p{ color:var(--ink-soft); margin:0; font-size:0.92rem; }
.link-card .go{
  margin-top:18px;
  font-family:var(--font-mono);
  font-size:0.75rem;
  font-weight:600;
  color:var(--red);
  letter-spacing:0.04em;
}

/* ---------- checklist ---------- */

.checklist{
  list-style:none; margin:0; padding:0;
  border-top:2px solid var(--ink);
}
.checklist li{
  display:flex; align-items:center; gap:14px;
  border-bottom:1px solid var(--ink);
  padding:16px 4px;
  font-size:0.98rem;
}
.checklist li:nth-child(even){ background:var(--paper-2); }
.checklist li::before{
  content:"";
  width:18px; height:18px;
  border:2px solid var(--ink);
  border-radius:3px;
  flex:none;
}
.checklist li.done{ color:var(--ink-soft); }
.checklist li.done::before{
  background:var(--teal);
  border-color:var(--teal);
}
.checklist li.done span{ text-decoration:line-through; }

/* ---------- itinerary day stubs ---------- */

.day-timeline{
  display:grid; gap:26px;
}
.day-stub{
  position:relative;
  background:var(--paper-2);
  color:var(--ink);
  border:var(--border);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-sm);
  display:grid;
  grid-template-columns:150px 1fr;
  overflow:hidden;
}
.day-stub:nth-child(odd){ transform:rotate(-0.35deg); }
.day-stub:nth-child(even){ transform:rotate(0.35deg); }
.day-stub-date{
  background:var(--ink);
  color:var(--paper);
  padding:24px 20px;
  display:flex; flex-direction:column; justify-content:center;
  position:relative;
  border-right:2px dashed rgba(247,240,222,0.4);
}
.day-stub-date .day-num{
  font-family:var(--font-mono);
  font-size:0.66rem;
  letter-spacing:0.1em;
  text-transform:uppercase;
  color:var(--gold-bright);
}
.day-stub-date .day-date{
  font-family:var(--font-display);
  font-size:1.7rem;
  font-weight:400;
  margin-top:6px;
  line-height:1.1;
}
.day-stub-body{ padding:24px 28px; }
.day-stub-body h3{
  font-size:1.25rem; font-weight:700; color:var(--ink);
  margin-bottom:4px;
}
.day-city{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:0.64rem;
  letter-spacing:0.08em;
  text-transform:uppercase;
  padding:3px 9px;
  border:2px solid var(--ink);
  border-radius:20px;
  margin-bottom:10px;
  color:var(--ink);
  background:var(--paper);
}
.day-city.hcm{ background:var(--red-bright); color:var(--paper); }
.day-city.ninhbinh{ background:var(--teal-bright); color:var(--paper); }
.day-city.hanoi{ background:var(--gold-bright); color:var(--ink); }
.day-city.transit{ background:var(--paper); color:var(--ink-soft); }

.day-stub ul{
  margin:10px 0 0; padding-left:18px;
  font-size:0.92rem; color:var(--ink-soft);
  display:grid; gap:5px;
}
.day-note{
  margin-top:12px;
  font-size:0.85rem;
  font-family:var(--font-display);
  font-style:italic;
  font-size:1.05rem;
  color:var(--red);
}

@media (max-width:640px){
  .day-stub, .day-stub:nth-child(odd), .day-stub:nth-child(even){ grid-template-columns:1fr; transform:none; }
  .day-stub-date{ flex-direction:row; gap:10px; align-items:baseline; border-right:none; border-bottom:2px dashed rgba(247,240,222,0.4); }
}

/* ---------- budget page ---------- */

.budget-panel{
  background:var(--paper-2);
  border:var(--border);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-lg);
  padding:32px;
}
.budget-summary{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(150px,1fr));
  gap:16px;
  margin-bottom:32px;
}
.budget-summary .stat{
  background:var(--ink);
  color:var(--on-dark);
  border-radius:var(--radius);
  padding:18px 20px;
  border-left:none;
}
.budget-summary .stat .stat-label{ color:var(--on-dark-soft); }

.expense-form{
  display:grid;
  grid-template-columns:1.4fr 0.8fr 1fr;
  gap:14px;
  margin-bottom:14px;
}
.expense-form .full{ grid-column:1 / -1; }
.expense-form label{
  display:block;
  font-family:var(--font-mono);
  font-size:0.64rem;
  letter-spacing:0.08em;
  text-transform:uppercase;
  color:var(--ink-soft);
  margin-bottom:6px;
}
.expense-form input[type="text"],
.expense-form input[type="number"],
.expense-form select{
  width:100%;
  background:var(--paper);
  border:2px solid var(--ink);
  border-radius:var(--radius);
  padding:10px 12px;
  color:var(--ink);
  font-family:var(--font-body);
  font-size:0.92rem;
}
.split-group{
  display:flex; flex-wrap:wrap; gap:10px;
}
.split-chip{
  font-family:var(--font-mono);
  font-size:0.76rem;
  padding:7px 12px;
  border-radius:20px;
  border:2px solid var(--ink);
  cursor:pointer;
  user-select:none;
  color:var(--ink-soft);
  background:var(--paper);
  transition:all .12s ease;
}
.split-chip input{ display:none; }
.split-chip.active{
  background:var(--gold-bright);
  color:var(--ink);
  font-weight:600;
}
.btn{
  font-family:var(--font-mono);
  font-size:0.78rem;
  font-weight:600;
  letter-spacing:0.04em;
  text-transform:uppercase;
  background:var(--red-bright);
  color:var(--paper);
  border:2px solid var(--ink);
  border-radius:var(--radius);
  box-shadow:3px 3px 0 var(--ink);
  padding:11px 20px;
  cursor:pointer;
  transition:transform .1s ease, box-shadow .1s ease, background .12s ease;
}
.btn:hover{ background:var(--red); }
.btn:active{ transform:translate(3px,3px); box-shadow:0 0 0 var(--ink); }
.btn.ghost{
  background:var(--paper);
  color:var(--ink);
}
.btn.ghost:hover{ background:var(--paper-3); }
.btn.small{ padding:6px 12px; font-size:0.66rem; box-shadow:2px 2px 0 var(--ink); }
.btn.small:active{ transform:translate(2px,2px); box-shadow:0 0 0 var(--ink); }

table.expense-table{
  width:100%;
  border-collapse:collapse;
  margin-top:28px;
  font-size:0.88rem;
}
table.expense-table th{
  text-align:left;
  font-family:var(--font-mono);
  font-size:0.62rem;
  letter-spacing:0.08em;
  text-transform:uppercase;
  color:var(--ink);
  padding:0 10px 10px;
  border-bottom:2px solid var(--ink);
}
table.expense-table td{
  padding:12px 10px;
  border-bottom:1px solid var(--ink-soft);
  color:var(--ink);
  vertical-align:top;
}
table.expense-table tr:nth-child(even) td{ background:var(--paper-3); }
table.expense-table td.amount, table.expense-table th.amount{ text-align:right; font-family:var(--font-mono); }
.empty-row td{ text-align:center; color:var(--ink-soft); font-style:italic; padding:32px 0; background:none !important; }

.balances{ margin-top:28px; display:grid; gap:10px; }
.balance-row{
  display:flex; justify-content:space-between; align-items:center;
  background:var(--paper);
  border:2px solid var(--ink);
  border-radius:var(--radius);
  padding:12px 16px;
  font-family:var(--font-mono);
  font-size:0.85rem;
}
.balance-row .who{ color:var(--ink); }
.balance-row .amt.owes{ color:var(--red); font-weight:700; }
.balance-row .amt.owed{ color:var(--teal); font-weight:700; }
.balance-row .amt.settled{ color:var(--ink-soft); }

/* ---------- footer ---------- */

footer{
  padding:36px 0;
  text-align:center;
  color:var(--on-dark-soft);
  font-family:var(--font-mono);
  font-size:0.75rem;
  letter-spacing:0.04em;
  background:var(--ink);
}
footer .gold{ color:var(--gold-bright); }