/* ============================================================
   Phát hành App ra thế giới từ Việt Nam — Editorial report
   Design tokens + base + layout
   ============================================================ */

:root {
  /* Paper & ink */
  --paper:      #F4F0E7;
  --paper-2:    #FBF8F1;
  --paper-3:    #EFEADD;
  --card:       #FCFAF4;
  --ink:        #1A1813;
  --ink-soft:   #463F35;
  --ink-mute:   #8B8473;
  --ink-faint:  #ADA593;
  --line:       #DBD4C2;
  --line-soft:  #E7E1D2;

  /* Accent — editorial terracotta */
  --accent:     #B4502B;
  --accent-deep:#8C3C1E;
  --accent-soft:#E8D3C6;

  /* Money signals */
  --green:      #2E5E48;
  --green-soft: #CFE0D3;
  --taupe:      #C3B7A0;   /* deductions */
  --taupe-deep: #A8997C;

  /* Type */
  --serif: "Newsreader", Georgia, serif;
  --sans:  "Archivo", system-ui, sans-serif;
  --mono:  "IBM Plex Mono", ui-monospace, monospace;

  --maxw: 1120px;
  --gutter: clamp(20px, 5vw, 64px);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
  font-feature-settings: "ss01", "cv01";
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* subtle paper grain */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.5;
  background-image: radial-gradient(rgba(120,108,84,0.05) 1px, transparent 1px);
  background-size: 4px 4px;
}

#root { position: relative; z-index: 1; }

/* ---- Layout primitives ---- */
.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding-inline: var(--gutter);
}
.section { padding-block: clamp(56px, 8vw, 110px); }
.rule {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 0;
}
.rule-thick {
  border: 0;
  border-top: 2px solid var(--ink);
  margin: 0;
}

/* ---- Type ---- */
.eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 500;
  margin: 0;
  display: flex;
  align-items: center;
  gap: 12px;
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--accent);
  display: inline-block;
}
.eyebrow.no-tick::before { display: none; }

h1, h2, h3 { font-family: var(--serif); font-weight: 500; color: var(--ink); margin: 0; }
h1 { font-size: clamp(44px, 8vw, 96px); line-height: 0.98; letter-spacing: -0.015em; }
h2 { font-size: clamp(30px, 4.4vw, 52px); line-height: 1.04; letter-spacing: -0.01em; }
h3 { font-size: clamp(20px, 2.4vw, 27px); line-height: 1.15; }

.serif-it { font-style: italic; }

.lede {
  font-family: var(--serif);
  font-size: clamp(19px, 2.2vw, 25px);
  line-height: 1.45;
  color: var(--ink-soft);
  font-weight: 380;
}
.body-col { max-width: 62ch; }
.muted { color: var(--ink-mute); }
.small { font-size: 14px; line-height: 1.55; }
.mono { font-family: var(--mono); }
.num { font-family: var(--mono); font-feature-settings: "tnum"; font-variant-numeric: tabular-nums; }

a { color: var(--accent); text-decoration: none; border-bottom: 1px solid var(--accent-soft); }
a:hover { border-color: var(--accent); }

/* ---- Section heading block ---- */
.sec-head { display: grid; gap: 16px; margin-bottom: clamp(32px, 5vw, 56px); }
.sec-head .lede { max-width: 56ch; }

/* number tag like "01" */
.sec-num {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink-faint);
  letter-spacing: 0.1em;
}

/* ---- Cards ---- */
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 3px;
}

/* ---- Stat block ---- */
.statgrid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 2px solid var(--ink);
}
.stat {
  padding: 28px 26px 32px;
  border-right: 1px solid var(--line);
}
.stat:last-child { border-right: 0; }
.stat .k {
  font-family: var(--serif);
  font-size: clamp(34px, 4.4vw, 56px);
  line-height: 1;
  letter-spacing: -0.02em;
  display: block;
}
.stat .k .unit { font-size: 0.42em; color: var(--ink-mute); font-family: var(--sans); letter-spacing: 0; }
.stat .lab {
  margin-top: 14px;
  font-size: 14.5px;
  color: var(--ink-soft);
  line-height: 1.4;
}
.stat .sub { margin-top: 6px; font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.06em; color: var(--accent); text-transform: uppercase; }

@media (max-width: 880px) {
  .statgrid { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(2) { border-right: 0; }
  .stat:nth-child(1), .stat:nth-child(2) { border-bottom: 1px solid var(--line); }
}
@media (max-width: 520px) {
  .statgrid { grid-template-columns: 1fr; }
  .stat { border-right: 0; border-bottom: 1px solid var(--line); }
}

/* ---- Comparison table ---- */
.cmp { border-top: 2px solid var(--ink); }
.cmp-row {
  display: grid;
  grid-template-columns: 1.1fr 1fr 1fr;
  border-bottom: 1px solid var(--line);
}
.cmp-row > div { padding: 18px 22px; }
.cmp-row .crit { color: var(--ink-soft); font-size: 15px; display: flex; align-items: center; }
.cmp-head > div { padding-block: 16px; }
.cmp-head .col-t { font-family: var(--serif); font-size: 22px; }
.cmp-head .col-t .pill {
  display: inline-block; font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.1em;
  text-transform: uppercase; padding: 3px 9px; border-radius: 100px; margin-left: 2px; vertical-align: middle;
}
.cmp-col-a { background: var(--paper-2); border-left: 1px solid var(--line); }
.cmp-col-b { background: #F3EDE0; border-left: 1px solid var(--line); }
.cmp-val { font-size: 15px; }
.cmp-val strong { font-weight: 600; }
.tick { color: var(--green); font-weight: 600; }
.cross { color: var(--accent); font-weight: 600; }
@media (max-width: 760px) {
  .cmp-row { grid-template-columns: 1fr; }
  .cmp-row > div { padding: 12px 18px; border-top: 1px solid var(--line-soft); }
  .cmp-row .crit { border-top: 0; padding-bottom: 4px; font-family: var(--mono); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--accent); }
  .cmp-head { display: none; }
  .cmp-col-a, .cmp-col-b { border-left: 3px solid var(--line); }
  .cmp-val::before { content: attr(data-col) " — "; font-family: var(--mono); font-size: 11px; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-faint); }
}

/* ---- Interactive panel framing ---- */
.tool {
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-top: 3px solid var(--accent);
  border-radius: 4px;
}
.tool-tag {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.tool-tag .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); animation: pulse 2.4s ease-in-out infinite; }
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:.35} }

/* ---- Controls ---- */
.field { display: grid; gap: 9px; }
.field-lab { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
.field-lab .nm { font-size: 14px; color: var(--ink-soft); font-weight: 500; line-height: 1.25; }
.field-lab .vl { font-family: var(--mono); font-size: 15px; color: var(--ink); font-variant-numeric: tabular-nums; }

input[type="range"] {
  -webkit-appearance: none; appearance: none;
  width: 100%; height: 2px; background: var(--line); outline: none; margin: 8px 0;
  cursor: pointer; border-radius: 2px; accent-color: var(--accent);
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--paper-2); border: 2px solid var(--accent);
  box-shadow: 0 1px 4px rgba(0,0,0,0.12); cursor: pointer; transition: transform .12s;
}
input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.12); }
input[type="range"]::-moz-range-thumb {
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--paper-2); border: 2px solid var(--accent); cursor: pointer;
}

.numinput {
  font-family: var(--mono); font-size: 15px; color: var(--ink);
  background: var(--card); border: 1px solid var(--line); border-radius: 3px;
  padding: 9px 12px; width: 100%; outline: none;
}
.numinput:focus { border-color: var(--accent); }
input[type="date"].numinput { accent-color: var(--accent); }

/* segmented toggle */
.seg { display: inline-flex; background: var(--paper-3); border: 1px solid var(--line); border-radius: 100px; padding: 3px; gap: 2px; }
.seg button {
  font-family: var(--sans); font-size: 13.5px; font-weight: 500;
  border: 0; background: transparent; color: var(--ink-mute);
  padding: 8px 16px; border-radius: 100px; cursor: pointer; transition: all .16s;
  white-space: nowrap;
}
.seg button.on { background: var(--ink); color: var(--paper); }
.seg.accent button.on { background: var(--accent); color: #fff; }

/* ---- Generic helpers ---- */
.row { display: flex; }
.between { justify-content: space-between; }
.center { align-items: center; }
.wrapflex { flex-wrap: wrap; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.stack { display: grid; }
@media (max-width: 760px) { .grid2 { grid-template-columns: 1fr; } }