:root {
  --bg: #fff7fa;
  --card: #ffffff;
  --ink: #2b2230;
  --muted: #7d7183;
  --line: #f3dbe4;
  --pink: #e84c88;
  --pink-d: #c7346e;
  --soft: #fde7ef;
  --ok: #1f9d6b;
  --warn: #c0392b;
  --r: 18px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.55 "Be Vietnam Pro", system-ui, -apple-system, sans-serif;
}
a { color: var(--pink-d); }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 16px; }
.narrow { max-width: 640px; margin: 0 auto; }

header.top { display: flex; align-items: center; justify-content: space-between; padding: 16px 0; }
.logo { font-weight: 800; font-size: 22px; color: var(--pink); letter-spacing: -0.5px; text-decoration: none; }
.zalo-link { font-size: 14px; font-weight: 600; text-decoration: none; background: var(--soft); padding: 8px 14px; border-radius: 999px; }

.hero { display: grid; grid-template-columns: 1.05fr 1fr; gap: 36px; align-items: center; padding: 24px 0 48px; }
.hero h1 { font-size: clamp(30px, 5vw, 46px); line-height: 1.15; margin: 0 0 14px; letter-spacing: -1px; }
.hero h1 em { font-style: normal; color: var(--pink); }
.hero p.sub { font-size: 18px; color: var(--muted); margin: 0 0 20px; }
.ticks { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.ticks li { padding-left: 28px; position: relative; }
.ticks li::before { content: "✓"; position: absolute; left: 0; top: 0; width: 20px; height: 20px; border-radius: 50%; background: var(--soft); color: var(--pink-d); font-size: 12px; font-weight: 800; display: grid; place-items: center; margin-top: 2px; }

.card { background: var(--card); border-radius: var(--r); padding: 22px; box-shadow: 0 10px 40px rgba(232, 76, 136, 0.12); border: 1px solid var(--line); }
.card h2 { margin: 0 0 4px; font-size: 20px; }
.card .hint { color: var(--muted); font-size: 14px; margin: 0 0 16px; }

.seg { display: grid; grid-auto-flow: column; grid-auto-columns: 1fr; gap: 6px; background: var(--soft); padding: 4px; border-radius: 12px; margin-bottom: 12px; }
.seg button { border: 0; background: transparent; padding: 10px 6px; border-radius: 9px; font: inherit; font-weight: 600; color: var(--muted); cursor: pointer; }
.seg button.on { background: #fff; color: var(--pink-d); box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06); }

.row3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.row2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
label.f { display: block; font-size: 13px; font-weight: 600; color: var(--muted); margin-bottom: 12px; }
input, select, textarea {
  width: 100%; margin-top: 5px; padding: 12px 13px; border: 1.5px solid var(--line); border-radius: 12px;
  font: inherit; font-size: 16px; color: var(--ink); background: #fff; outline: none;
}
input:focus, select:focus, textarea:focus { border-color: var(--pink); }
textarea { min-height: 70px; resize: vertical; }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; width: 100%; border: 0; border-radius: 999px; padding: 15px 22px; font: inherit; font-weight: 700; font-size: 17px; cursor: pointer; background: var(--pink); color: #fff; box-shadow: 0 8px 22px rgba(232, 76, 136, 0.35); text-decoration: none; }
.btn:hover { background: var(--pink-d); }
.btn:disabled { opacity: 0.6; cursor: wait; }
.btn.ghost { background: #fff; color: var(--pink-d); border: 1.5px solid var(--pink); box-shadow: none; }
.btn.small { width: auto; padding: 9px 16px; font-size: 14px; }

.result { display: none; margin-top: 18px; padding-top: 18px; border-top: 1px dashed var(--line); }
.result.show { display: block; }
.kcal { text-align: center; }
.kcal b { display: block; font-size: 44px; color: var(--pink); line-height: 1.1; letter-spacing: -1px; }
.kcal span { color: var(--muted); font-size: 14px; }
.macros { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 14px 0; }
.macro { background: var(--soft); border-radius: 12px; padding: 10px; text-align: center; }
.macro b { display: block; font-size: 20px; }
.macro small { color: var(--muted); }
.note { font-size: 13px; color: var(--muted); }
.callout { background: #fff3f7; border-left: 4px solid var(--pink); padding: 12px 14px; border-radius: 10px; font-size: 15px; margin: 14px 0; }

section.block { padding: 48px 0; }
section.block h2.t { font-size: clamp(26px, 4vw, 34px); text-align: center; margin: 0 0 8px; letter-spacing: -0.5px; }
section.block p.lead { text-align: center; color: var(--muted); margin: 0 auto 28px; max-width: 620px; }

.plans { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; align-items: stretch; }
.plan { display: flex; flex-direction: column; position: relative; }
.plan.best { border: 2px solid var(--pink); }
.badge { position: absolute; top: -13px; left: 50%; transform: translateX(-50%); background: var(--pink); color: #fff; font-size: 12px; font-weight: 700; padding: 4px 12px; border-radius: 999px; white-space: nowrap; }
.plan h3 { margin: 6px 0 4px; font-size: 20px; }
.price { font-size: 30px; font-weight: 800; color: var(--pink-d); margin: 6px 0 2px; }
.price .old { font-size: 18px; color: var(--muted); font-weight: 600; margin-right: 4px; }
.price small { font-size: 14px; color: var(--muted); font-weight: 500; }
.plan ul { padding-left: 0; list-style: none; margin: 14px 0 20px; display: grid; gap: 8px; flex: 1; font-size: 15px; }
.plan ul li { padding-left: 24px; position: relative; }
.plan ul li::before { content: "✓"; position: absolute; left: 0; color: var(--pink); font-weight: 800; }

.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; counter-reset: s; }
.step { background: #fff; border: 1px solid var(--line); border-radius: var(--r); padding: 18px; }
.step::before { counter-increment: s; content: counter(s); display: grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; background: var(--pink); color: #fff; font-weight: 800; margin-bottom: 10px; }
.step b { display: block; margin-bottom: 4px; }
.step span { color: var(--muted); font-size: 14px; }

details { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 14px 18px; margin-bottom: 10px; }
summary { font-weight: 700; cursor: pointer; }
details p { margin: 10px 0 0; color: #4a3f50; }

footer { padding: 30px 0 90px; color: var(--muted); font-size: 13px; text-align: center; border-top: 1px solid var(--line); }

/* form đặt plan */
.sheet { position: fixed; inset: 0; background: rgba(43, 34, 48, 0.55); display: none; z-index: 50; overflow-y: auto; padding: 24px 12px; }
.sheet.show { display: block; }
.sheet .card { max-width: 620px; margin: 0 auto; position: relative; }
.sheet h2 { padding-right: 40px; }
.close { position: absolute; top: 12px; right: 12px; border: 0; background: var(--soft); width: 36px; height: 36px; border-radius: 50%; font-size: 20px; cursor: pointer; color: var(--pink-d); }
fieldset { border: 0; padding: 0; margin: 0 0 18px; }
legend { font-weight: 800; font-size: 16px; margin-bottom: 10px; color: var(--pink-d); }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 6px 0 12px; }
.chips label { display: inline-flex; align-items: center; gap: 6px; background: #fff; border: 1.5px solid var(--line); border-radius: 999px; padding: 8px 13px; font-size: 14px; cursor: pointer; color: var(--ink); font-weight: 500; }
.chips input { width: auto; margin: 0; accent-color: var(--pink); }
.chips label:has(input:checked) { border-color: var(--pink); background: var(--soft); }
.qlabel { font-size: 14px; font-weight: 700; margin: 4px 0 0; }
.err { color: var(--warn); font-size: 14px; margin: 8px 0; min-height: 1em; }
.consent { display: flex; gap: 10px; align-items: flex-start; font-size: 14px; color: #4a3f50; margin: 10px 0 16px; }
.consent input { width: 20px; height: 20px; margin: 2px 0 0; flex: none; accent-color: var(--pink); }

.pay { text-align: center; }
.pay img { width: 100%; max-width: 300px; border-radius: 14px; border: 1px solid var(--line); }
.paybox { text-align: left; background: var(--soft); border-radius: 14px; padding: 12px 14px; margin: 14px 0; font-size: 15px; }
.paybox div { display: flex; justify-content: space-between; gap: 10px; padding: 4px 0; align-items: center; }
.paybox b { word-break: break-all; }
.copy { border: 0; background: #fff; color: var(--pink-d); font-weight: 700; border-radius: 8px; padding: 4px 10px; cursor: pointer; font: inherit; font-size: 13px; }
.wait { display: flex; align-items: center; justify-content: center; gap: 10px; color: var(--muted); font-size: 14px; }
.dot { width: 10px; height: 10px; border-radius: 50%; background: var(--pink); animation: p 1.2s infinite; }
@keyframes p { 50% { opacity: 0.25; } }
.done { font-size: 54px; }

.floatcta { position: fixed; left: 12px; right: 12px; bottom: 12px; z-index: 40; display: none; }
@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; gap: 22px; padding-top: 6px; }
  .plans { grid-template-columns: 1fr; gap: 22px; }
  .steps { grid-template-columns: 1fr 1fr; }
  .floatcta.show { display: block; }
}
@media (max-width: 420px) {
  .steps { grid-template-columns: 1fr; }
  .row3 { grid-template-columns: 1fr 1fr 1fr; gap: 6px; }
}

.leadbox { background: #fff; border: 2px dashed var(--pink); border-radius: 16px; padding: 16px; margin: 14px 0 10px; }
.leadbox b { display: block; font-size: 17px; }
.leadbox input { margin-top: 0; }
.leadbox .row2 { margin: 10px 0 0; }
.link-more { display: block; text-align: center; font-weight: 600; font-size: 15px; margin-top: 6px; }
.sday { margin: 14px 0; }
.sday .m { border-bottom: 1px solid var(--line); padding: 10px 0; font-size: 15px; }
.sday .m b { color: var(--pink-d); }
.sday .m small { color: var(--muted); display: block; }
.trust { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; text-align: center; }
.trust div { background: #fff; border: 1px solid var(--line); border-radius: var(--r); padding: 18px 12px; }
.trust b { display: block; font-size: 24px; color: var(--pink); }
.trust span { font-size: 14px; color: var(--muted); }
.resume { position: fixed; top: 0; left: 0; right: 0; z-index: 45; background: var(--ink); color: #fff; text-align: center; padding: 10px 12px; font-size: 14px; }
@media (max-width: 860px) {
  .plan.best { order: -1; }
  .trust { grid-template-columns: 1fr; }
}
.price .sub2 { display: block; font-size: 13px; margin-top: 2px; }