/* Snaf landing — mobile trước, mở rộng cho PC ở 720px / 980px. */
:root {
  --base: #F4F2F8;        /* nền neu dùng chung với app */
  --tint: #EEE6F6;        /* nền auth của app, dùng cho section xen kẽ */
  --lilac: #D3C0EC;       /* mặt nút CTA */
  --grape: #5826A8;       /* chữ/icon nhấn */
  --violet: #7C3AED;
  --ink: #2B2440;
  --muted: #6B6480;
  --amber: #F59E0B;
  --mint: #10B981;
  --white: #FFFFFF;

  --hi: rgba(255, 255, 255, .9);
  --lo: rgba(120, 100, 160, .22);
  --raise: -6px -6px 14px var(--hi), 6px 8px 18px var(--lo);
  --raise-sm: -3px -3px 8px var(--hi), 3px 4px 10px var(--lo);
  --inset: inset 3px 3px 7px var(--lo), inset -3px -3px 7px var(--hi);

  --display: "Baloo 2", system-ui, sans-serif;
  --body: "Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", sans-serif;

  --r-lg: 28px;
  --r-md: 20px;
  --gutter: 16px;
  --dock-h: 0px;
  color-scheme: light;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--base);
  color: var(--ink);
  font: 400 16px/1.6 var(--body);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  padding-bottom: var(--dock-h);
}
img, svg { display: block; max-width: 100%; }
h1, h2, h3 { font-family: var(--display); line-height: 1.08; margin: 0; letter-spacing: -.01em; }
p { margin: 0; }
a { color: inherit; }
button { font: inherit; color: inherit; }
:focus-visible { outline: 3px solid var(--violet); outline-offset: 3px; border-radius: 12px; }

.wrap { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 var(--gutter); }
.wrap--narrow { max-width: 760px; }

.skip { position: absolute; left: -999px; top: 8px; background: var(--white); padding: 10px 14px; border-radius: 10px; z-index: 50; }
.skip:focus { left: 8px; }

/* ── Nút ─────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 48px; padding: 0 22px;
  background: var(--lilac); color: var(--grape);
  font: 700 16px/1 var(--body); text-decoration: none;
  border-radius: 16px; border: 0;
  box-shadow: var(--raise);
  transition: transform .15s ease, box-shadow .15s ease;
  -webkit-tap-highlight-color: transparent;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(1px); box-shadow: var(--inset); }
.btn--sm { min-height: 40px; padding: 0 14px; font-size: 14px; border-radius: 12px; box-shadow: var(--raise-sm); }
.btn--lg { min-height: 56px; padding: 0 28px; font-size: 17px; border-radius: 18px; }
.btn--ghost { background: var(--base); color: var(--ink); }
.btn--light { background: var(--white); color: var(--grape); box-shadow: 0 10px 30px rgba(40, 10, 90, .25); }

/* ── Header ──────────────────────────────────────── */
.top {
  position: sticky; top: 0; z-index: 20;
  background: rgba(244, 242, 248, .82);
  backdrop-filter: saturate(1.4) blur(12px);
  -webkit-backdrop-filter: saturate(1.4) blur(12px);
  padding-top: env(safe-area-inset-top);
}
.top__row { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font: 800 24px/1 var(--display); color: var(--grape); }
.brand img { border-radius: 10px; }
.brand--sm { font-size: 18px; gap: 8px; }
.brand--sm img { border-radius: 6px; }
.top__nav { display: none; }

/* ── Hero ────────────────────────────────────────── */
.hero { padding: 20px 0 48px; }
.hero__grid { display: grid; gap: 32px; }
.pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 12px; border-radius: 999px;
  background: var(--base); box-shadow: var(--raise-sm);
  font-size: 13px; font-weight: 600; color: var(--grape);
}
.spark { color: var(--amber); }
.hero h1 {
  margin-top: 18px;
  font-size: clamp(38px, 11vw, 68px);
  font-weight: 800;
  line-height: 1.02;
}
.hero h1 em {
  font-style: normal; color: var(--grape);
  background: linear-gradient(transparent 62%, rgba(245, 158, 11, .35) 62%);
}
.lead { margin-top: 16px; font-size: 17px; color: var(--muted); max-width: 34em; }
.hero__cta { margin-top: 24px; display: grid; gap: 10px; }
.hero__cta .btn { width: 100%; }
.hint { font-size: 13px; color: var(--muted); }

/* Demo */
.demo { display: grid; gap: 14px; justify-items: center; }
.chips { display: flex; gap: 8px; padding: 6px; border-radius: 999px; box-shadow: var(--inset); }
.chip {
  min-height: 40px; padding: 0 14px; border: 0; border-radius: 999px;
  background: transparent; font-size: 14px; font-weight: 600; color: var(--muted); cursor: pointer;
}
.chip[aria-selected="true"] { background: var(--base); color: var(--grape); box-shadow: var(--raise-sm); }

.phone { position: relative; width: min(100%, 360px); }
.viewfinder {
  position: relative; aspect-ratio: 1 / 1; border-radius: 32px; overflow: hidden;
  background: radial-gradient(120% 90% at 30% 20%, #FFFFFF 0%, #E7DEF3 60%, #D9CDEB 100%);
  box-shadow: var(--raise);
}
.dish {
  position: absolute; inset: 10%; width: 80%; height: 80%;
  opacity: 0; transform: scale(.92) rotate(-6deg);
  transition: opacity .45s ease, transform .6s cubic-bezier(.2, .8, .2, 1);
  filter: drop-shadow(0 14px 18px rgba(60, 30, 100, .22));
}
.dish.is-on { opacity: 1; transform: none; }
.corner { position: absolute; width: 28px; height: 28px; border: 3.5px solid var(--white); z-index: 2; opacity: .95; }
.corner.tl { top: 16px; left: 16px; border-right: 0; border-bottom: 0; border-top-left-radius: 12px; }
.corner.tr { top: 16px; right: 16px; border-left: 0; border-bottom: 0; border-top-right-radius: 12px; }
.corner.bl { bottom: 16px; left: 16px; border-right: 0; border-top: 0; border-bottom-left-radius: 12px; }
.corner.br { bottom: 16px; right: 16px; border-left: 0; border-top: 0; border-bottom-right-radius: 12px; }
.scan {
  position: absolute; left: 0; right: 0; top: -20%; height: 20%; z-index: 1;
  background: linear-gradient(180deg, transparent, rgba(124, 58, 237, .28) 80%, rgba(255, 255, 255, .95) 100%);
  opacity: 0;
}
.flash { position: absolute; inset: 0; background: var(--white); opacity: 0; z-index: 3; pointer-events: none; }
.viewfinder.is-scanning .scan { animation: scan 1.1s cubic-bezier(.5, 0, .5, 1) forwards; }
.viewfinder.is-scanning .flash { animation: flash .35s ease-out; }
@keyframes scan { 0% { top: -20%; opacity: 1; } 90% { opacity: 1; } 100% { top: 100%; opacity: 0; } }
@keyframes flash { 0% { opacity: .85; } 100% { opacity: 0; } }

/* Phiếu dinh dưỡng — góc phải trên có “vết cắn” như logo */
.receipt-shadow {
  position: relative; z-index: 4;
  margin: -64px 14px 0;
  filter: drop-shadow(0 16px 24px rgba(60, 30, 100, .18));
}
.receipt {
  background: var(--white); border-radius: 24px; padding: 18px 18px 16px;
  -webkit-mask:
    radial-gradient(circle 20px at calc(100% - 4px) 22px, transparent 98%, #000 100%),
    radial-gradient(circle 14px at calc(100% - 34px) 4px, transparent 98%, #000 100%);
  -webkit-mask-composite: source-in;
          mask:
    radial-gradient(circle 20px at calc(100% - 4px) 22px, transparent 98%, #000 100%),
    radial-gradient(circle 14px at calc(100% - 34px) 4px, transparent 98%, #000 100%);
          mask-composite: intersect;
  transition: transform .5s cubic-bezier(.2, .8, .2, 1), opacity .4s ease;
}
.receipt.is-hidden { transform: translateY(18px); opacity: 0; }
.receipt__head { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; padding-right: 30px; }
.receipt__label { font-size: 12px; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; }
.receipt__name { font: 700 20px/1.2 var(--display); }
.score {
  flex: none; display: flex; align-items: baseline; gap: 1px;
  padding: 4px 10px; border-radius: 12px; background: #E7F8F1; color: #0B7A57;
  font: 800 20px/1.2 var(--display);
}
.score small { font-size: 12px; font-weight: 700; opacity: .7; }
.score.is-mid { background: #FEF3C7; color: #92590A; }
.kcal { margin-top: 6px; font: 800 44px/1 var(--display); color: var(--amber); font-variant-numeric: tabular-nums; }
.kcal small { font: 600 15px var(--body); color: var(--muted); }
.macros { list-style: none; margin: 14px 0 0; padding: 0; display: grid; gap: 8px; }
.macros li { display: grid; grid-template-columns: 40px 44px 1fr; align-items: center; gap: 8px; font-size: 14px; }
.macros span { color: var(--muted); }
.macros b { font-variant-numeric: tabular-nums; }
.macros i { height: 8px; border-radius: 99px; background: var(--base); box-shadow: inset 1px 1px 3px var(--lo); overflow: hidden; }
.bar { display: block; height: 100%; width: 0; border-radius: inherit; transition: width .9s cubic-bezier(.2, .8, .2, 1); }
.bar--p { background: #8B5CF6; }
.bar--f { background: #F59E0B; }
.bar--c { background: #60A5FA; }
.verdict { margin-top: 12px; padding-top: 12px; border-top: 1px dashed #E6E0EF; font-size: 14px; color: var(--ink); }
.demo__note { font-size: 12px; color: var(--muted); text-align: center; }

/* ── Section chung ───────────────────────────────── */
.section { padding: 56px 0; }
.section--tint { background: var(--tint); }
.eyebrow { font-size: 13px; font-weight: 700; color: var(--grape); text-transform: uppercase; letter-spacing: .08em; }
.section h2 { margin-top: 6px; font-size: clamp(28px, 7.5vw, 44px); font-weight: 800; max-width: 18em; }
.card { background: var(--base); border-radius: var(--r-lg); box-shadow: var(--raise); padding: 22px; }
.section--tint .card { background: var(--tint); }
.card h3 { font-size: 21px; font-weight: 700; }
.card p { margin-top: 6px; color: var(--muted); font-size: 15px; }

/* Các bước */
.steps { list-style: none; padding: 0; margin: 28px 0 0; display: grid; gap: 16px; }
.step-n {
  display: grid; place-items: center; width: 44px; height: 44px; margin-bottom: 14px;
  border-radius: 14px; box-shadow: var(--inset);
  font: 800 22px/1 var(--display); color: var(--grape);
}

/* Bento tính năng */
.bento { margin-top: 28px; display: grid; gap: 16px; }
.feat { display: flex; flex-direction: column; }
.ring { position: relative; width: 140px; height: 140px; margin: 20px auto 4px; }
.ring svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.ring__track { fill: none; stroke: rgba(120, 100, 160, .14); stroke-width: 12; }
.ring__fill { fill: none; stroke: var(--violet); stroke-width: 12; stroke-linecap: round; stroke-dasharray: 67 100; }
.ring__txt { position: absolute; inset: 0; display: grid; place-content: center; text-align: center; }
.ring__txt b { font: 800 28px/1 var(--display); }
.ring__txt span { font-size: 12px; color: var(--muted); }

.suggest { margin-top: 16px; padding: 14px; border-radius: var(--r-md); box-shadow: var(--inset); }
.suggest__gap { font-size: 14px; color: var(--ink) !important; margin: 0 !important; }
.suggest__gap b { color: var(--grape); }
.suggest ul { list-style: none; margin: 10px 0 0; padding: 0; display: grid; gap: 6px; }
.suggest li { display: flex; justify-content: space-between; font-size: 14px; font-weight: 600; }
.suggest li span { color: var(--mint); font-variant-numeric: tabular-nums; }

.chat { margin-top: 16px; display: grid; gap: 8px; }
.bubble { margin: 0 !important; padding: 10px 14px; border-radius: 18px; font-size: 14px !important; max-width: 88%; line-height: 1.45; }
.bubble--me { justify-self: end; background: var(--lilac); color: var(--grape) !important; border-bottom-right-radius: 6px; font-weight: 600; }
.bubble--ai { justify-self: start; background: var(--white); color: var(--ink) !important; border-bottom-left-radius: 6px; }

.streak { margin-top: 18px; display: grid; grid-template-columns: repeat(7, 1fr); gap: 6px; }
.d { display: grid; place-items: center; aspect-ratio: 1; border-radius: 12px; font-size: 11px; font-weight: 700; color: var(--muted); box-shadow: var(--inset); }
.d.on { background: var(--amber); color: var(--white); box-shadow: none; }
.d.today { outline: 3px solid rgba(245, 158, 11, .35); outline-offset: 2px; }

.spark-chart { margin-top: 18px; height: 60px; color: var(--violet); }
.spark-chart svg { width: 100%; height: 100%; }

/* Bảng giá */
.cycle { display: inline-flex; gap: 4px; margin-top: 24px; padding: 5px; border-radius: 999px; box-shadow: var(--inset); }
.cycle button { min-height: 40px; padding: 0 16px; border: 0; border-radius: 999px; background: transparent; font-size: 14px; font-weight: 600; color: var(--muted); cursor: pointer; }
.cycle button[aria-checked="true"] { background: var(--base); color: var(--grape); box-shadow: var(--raise-sm); }
.save { color: var(--mint); font-weight: 700; }
.plans { margin-top: 20px; display: grid; gap: 16px; }
.plan { display: flex; flex-direction: column; }
.plan h3 { display: flex; align-items: center; gap: 8px; }
.plan .price { margin-top: 10px; font: 800 40px/1 var(--display); color: var(--ink); font-variant-numeric: tabular-nums; }
.price-sub { margin-top: 2px !important; font-size: 14px !important; }
.ticks { list-style: none; margin: 18px 0 22px; padding: 0; display: grid; gap: 10px; flex: 1; }
.ticks li { position: relative; padding-left: 28px; font-size: 15px; }
.ticks li::before {
  content: ""; position: absolute; left: 0; top: 3px; width: 18px; height: 18px; border-radius: 6px;
  background: var(--lilac) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M6 12.5l4 4 8-9' fill='none' stroke='%235826A8' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/14px no-repeat;
}
.plan .btn { width: 100%; }
.plan--pro { position: relative; outline: 2px solid var(--lilac); outline-offset: -2px; }
.badge {
  padding: 3px 8px; border-radius: 8px; color: var(--white);
  font: 700 11px/1.2 var(--body); letter-spacing: .06em;
  background: linear-gradient(135deg, #8B5CF6, #EC4899 55%, #F59E0B);
}
.fine { margin-top: 12px !important; font-size: 12.5px !important; text-align: center; }

/* Hỏi đáp */
.faq { margin-top: 24px; display: grid; gap: 12px; }
.faq details { background: var(--tint); border-radius: var(--r-md); box-shadow: var(--raise-sm); }
.faq summary {
  list-style: none; cursor: pointer; min-height: 56px; padding: 14px 52px 14px 18px; position: relative;
  display: flex; align-items: center; font-weight: 600; font-size: 16px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: ""; position: absolute; right: 18px; top: 50%; width: 10px; height: 10px; margin-top: -7px;
  border-right: 2.5px solid var(--grape); border-bottom: 2.5px solid var(--grape); transform: rotate(45deg);
  transition: transform .2s ease;
}
.faq details[open] summary::after { transform: rotate(225deg); margin-top: -2px; }
.faq details p { padding: 0 18px 18px; color: var(--muted); font-size: 15px; }

/* CTA cuối */
.final { padding: 24px 0 56px; }
.final__box {
  display: grid; justify-items: center; gap: 18px; text-align: center;
  padding-top: 40px; padding-bottom: 40px;
  border-radius: 32px;
  background: linear-gradient(180deg, #A86BDD 0%, #ABA8F2 100%);
  color: var(--white);
  width: calc(100% - 2 * var(--gutter));
}
.final h2 { font-size: clamp(28px, 7.5vw, 44px); font-weight: 800; max-width: 14em; }

.foot { padding: 24px 0 32px; font-size: 13px; color: var(--muted); }
.foot__row { display: flex; flex-wrap: wrap; gap: 8px 16px; align-items: center; justify-content: space-between; }

/* Thanh CTA dính đáy — chỉ mobile */
.dock {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 30;
  padding: 10px var(--gutter) calc(10px + env(safe-area-inset-bottom));
  background: rgba(244, 242, 248, .9);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 -6px 20px rgba(80, 60, 120, .08);
  transform: translateY(110%); transition: transform .3s cubic-bezier(.2, .8, .2, 1);
}
.dock .btn { width: 100%; }
.dock.is-on { transform: none; }

/* Hiện dần khi cuộn */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.reveal.is-in { opacity: 1; transform: none; }

/* ── Tablet / PC ─────────────────────────────────── */
@media (min-width: 720px) {
  :root { --gutter: 32px; }
  .top__row { height: 72px; }
  .top__nav { display: flex; gap: 28px; font-size: 15px; font-weight: 500; }
  .top__nav a { text-decoration: none; color: var(--muted); }
  .top__nav a:hover { color: var(--grape); }
  .btn--sm { min-height: 44px; padding: 0 18px; font-size: 15px; }
  .hero__cta { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 18px; }
  .hero__cta .btn { width: auto; }
  .hint { max-width: 22em; }
  .steps { grid-template-columns: repeat(3, 1fr); gap: 20px; }
  .bento { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .feat--log { grid-column: 1 / -1; }
  .plans { grid-template-columns: repeat(2, 1fr); gap: 20px; max-width: 760px; }
  .section { padding: 88px 0; }
  .dock { display: none; }
}

@media (min-width: 980px) {
  .hero { padding: 48px 0 88px; }
  .hero__grid { grid-template-columns: 1.05fr .95fr; align-items: center; gap: 56px; }
  .lead { font-size: 19px; }
  .phone { width: 400px; }
  .bento { grid-template-columns: repeat(6, 1fr); }
  .feat--goal { grid-column: span 2; grid-row: span 2; }
  .feat--suggest { grid-column: span 2; }
  .feat--coach { grid-column: span 2; grid-row: span 2; }
  .feat--streak { grid-column: span 2; }
  .feat--log { grid-column: 1 / -1; display: grid; grid-template-columns: 1fr 1.4fr; column-gap: 32px; align-items: center; }
  .feat--log .spark-chart { margin-top: 0; grid-row: 1 / 3; grid-column: 2; }
  .final__box { padding-top: 64px; padding-bottom: 64px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}