/* Weightnote — site styles. Light by default, follows the system dark mode.
   Palette from the app icon and App Store screenshots. Spacing on a 4px scale. */
:root {
  --bg: #f5f6fa;
  --surface: #ffffff;
  --ink: #111318;
  --sub: #5b6070;
  --faint: #e8eaf1;
  --accent: #425fea;
  --accent-ink: #ffffff;
  --accent-tint: #e9edfd;
  --green: #2f9e7c;
  --green-tint: #e4f5ee;
  --purple-tint: #f3eafa;
  --rose-tint: #fbe9ec;
  --badge-bg: #000000;
  --badge-ink: #ffffff;
  --shadow: 0 1px 2px rgba(17, 19, 24, .04), 0 8px 24px rgba(17, 19, 24, .06);
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --max: 1120px;
  --gut: 20px;
  --r-card: 20px;
  --r-field: 12px;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --surface: #15161b;
    --ink: #f3f4f7;
    --sub: #9ba0ad;
    --faint: #24262e;
    --accent: #6f88ff;
    --accent-ink: #ffffff;
    --accent-tint: #1a2047;
    --green: #4fd1a5;
    --green-tint: #10261f;
    --purple-tint: #231a2b;
    --rose-tint: #2b171b;
    --badge-bg: #000000;
    --badge-ink: #ffffff;
    --shadow: 0 0 0 1px #24262e;
  }
}
@media (min-width: 760px) { :root { --gut: 32px; } }

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 17px/1.55 var(--font); -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { line-height: 1.15; letter-spacing: -0.02em; margin: 0; }
p { margin: 0; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 6px; }
main { max-width: var(--max); margin: 0 auto; padding: 0 var(--gut); }

/* ---------------------------------------------------------------- nav */
.nav { position: sticky; top: 0; z-index: 20; background: color-mix(in srgb, var(--bg) 85%, transparent); backdrop-filter: saturate(180%) blur(16px); -webkit-backdrop-filter: saturate(180%) blur(16px); }
.nav__in { max-width: var(--max); margin: 0 auto; padding: 12px var(--gut); display: flex; align-items: center; gap: 24px; }
.nav__logo { display: inline-flex; align-items: center; gap: 8px; color: var(--ink); font-weight: 700; font-size: 18px; }
.nav__logo img { border-radius: 8px; }
.nav__logo:hover { text-decoration: none; }
.nav__links { display: flex; gap: 20px; margin-inline-start: auto; }
.nav__links a { color: var(--sub); font-size: 15px; font-weight: 500; }
.nav__links a:hover { color: var(--ink); text-decoration: none; }
.nav__cta { background: var(--accent); color: var(--accent-ink); font-weight: 600; font-size: 15px; padding: 8px 16px; border-radius: 999px; white-space: nowrap; }
.nav__cta:hover { text-decoration: none; filter: brightness(1.08); }
@media (max-width: 600px) { .nav__links { display: none; } .nav__cta { margin-inline-start: auto; } }

/* ---------------------------------------------------------- App Store badge */
.badge { display: inline-flex; align-items: center; gap: 8px; background: var(--badge-bg); color: var(--badge-ink); border-radius: 12px; padding: 8px 16px 8px 12px; border: 1px solid #3a3a3c; min-height: 48px; }
.badge:hover { text-decoration: none; filter: brightness(1.25); }
.badge__apple { width: 22px; height: 26px; flex: none; }
.badge__txt { display: flex; flex-direction: column; line-height: 1.05; text-align: start; }
.badge__txt small { font-size: 11px; font-weight: 500; }
.badge__txt b { font-size: 20px; font-weight: 600; letter-spacing: -0.01em; }
.badge--big { min-height: 60px; padding: 10px 20px 10px 16px; border-radius: 14px; }
.badge--big .badge__apple { width: 26px; height: 32px; }
.badge--big .badge__txt small { font-size: 12px; }
.badge--big .badge__txt b { font-size: 24px; }

/* --------------------------------------------------------------- hero */
.hero { display: grid; gap: 40px; align-items: center; padding: 40px 0 56px; }
@media (min-width: 900px) { .hero { grid-template-columns: 1.1fr .9fr; padding: 64px 0 80px; } }
.eyebrow { color: var(--accent); font-weight: 600; font-size: 15px; margin-bottom: 12px; }
.hero__h { font-size: clamp(40px, 7vw, 68px); font-weight: 800; letter-spacing: -0.035em; }
.hero__h span { display: block; color: var(--accent); }
.hero__sub { margin-top: 20px; font-size: clamp(18px, 2vw, 21px); color: var(--sub); max-width: 34em; }
.hero__cta { margin-top: 32px; display: flex; flex-direction: column; align-items: flex-start; gap: 12px; }
.hero__note { font-size: 14px; color: var(--sub); }
.hero__art { position: relative; display: flex; justify-content: center; min-height: 420px; }
.phone { border-radius: 44px; background: #0d0e11; padding: 9px; box-shadow: 0 30px 60px -20px rgba(30, 40, 90, .35), 0 0 0 1px rgba(0,0,0,.08); }
.phone img { border-radius: 36px; width: 100%; }
.hero__art .phone--front { width: min(300px, 64vw); position: relative; z-index: 2; transform: translateX(-12%); }
.hero__art .phone--back { width: min(260px, 54vw); position: absolute; top: 48px; inset-inline-end: 0; transform: rotate(6deg); opacity: .96; }
[dir="rtl"] .hero__art .phone--front { transform: translateX(12%); }
[dir="rtl"] .hero__art .phone--back { transform: rotate(-6deg); }
.hero__art::before { content: ""; position: absolute; inset: 10% 0 0; background: radial-gradient(closest-side, var(--accent-tint), transparent); z-index: 0; }
@media (max-width: 600px) { .hero__art { min-height: 0; } .hero__art .phone--back { top: 32px; } }

/* ----------------------------------------------------------- sections */
.sec { padding: 48px 0; }
.sec--tight { padding: 32px 0 0; }
@media (min-width: 760px) { .sec { padding: 72px 0; } }
.label { color: var(--sub); font-size: 14px; font-weight: 600; margin-bottom: 8px; }
.h2 { font-size: clamp(28px, 4vw, 40px); font-weight: 750; max-width: 22em; }
.h3 { font-size: 24px; font-weight: 700; }
.lead { color: var(--sub); font-size: 19px; margin-top: 12px; max-width: 38em; }
.more { margin-top: 24px; font-weight: 600; }

.cards { display: grid; gap: 16px; margin-top: 32px; }
@media (min-width: 760px) { .cards { grid-template-columns: repeat(3, 1fr); } }
.card { background: var(--surface); border-radius: var(--r-card); padding: 24px; box-shadow: var(--shadow); }
.card h3 { font-size: 19px; }
.card p { color: var(--sub); margin-top: 8px; font-size: 16px; }
.cards .card:nth-child(1) { background: var(--rose-tint); box-shadow: none; }
.cards .card:nth-child(2) { background: var(--accent-tint); box-shadow: none; }
.cards .card:nth-child(3) { background: var(--purple-tint); box-shadow: none; }

.steps { display: grid; gap: 32px; margin-top: 40px; }
@media (min-width: 760px) { .steps { grid-template-columns: repeat(3, 1fr); gap: 24px; } }
.step { display: flex; flex-direction: column; gap: 20px; }
.step .phone--sm { width: min(240px, 70%); border-radius: 36px; padding: 7px; }
.step .phone--sm img { border-radius: 30px; }
.step__n { display: inline-grid; place-items: center; width: 32px; height: 32px; border-radius: 50%; background: var(--accent); color: var(--accent-ink); font-weight: 700; font-size: 15px; margin-bottom: 12px; }
.step h3 { font-size: 21px; }
.step p { color: var(--sub); margin-top: 8px; }
.tag { display: inline-block; margin-top: 12px; background: var(--green-tint); color: var(--green); font-size: 13px; font-weight: 600; padding: 4px 12px; border-radius: 999px; }

.shots { list-style: none; margin: 32px calc(var(--gut) * -1) 0; padding: 0 var(--gut) 12px; display: flex; gap: 16px; overflow-x: auto; scroll-snap-type: x mandatory; scrollbar-width: thin; }
.shots li { flex: 0 0 min(240px, 62vw); scroll-snap-align: start; }
.shots img { border-radius: 24px; box-shadow: var(--shadow); }

.feats { display: grid; gap: 16px; margin-top: 32px; }
@media (min-width: 600px) { .feats { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 900px) { .feats { grid-template-columns: repeat(3, 1fr); } }
.feat { background: var(--surface); border-radius: var(--r-card); padding: 24px; box-shadow: var(--shadow); }
.feat__k { color: var(--accent); font-size: 13px; font-weight: 600; margin-bottom: 8px; }
.feat h3 { font-size: 19px; }
.feat p:last-child { color: var(--sub); margin-top: 8px; font-size: 16px; }

.spot { background: var(--surface); border-radius: var(--r-card); padding: 32px; box-shadow: var(--shadow); max-width: 760px; }
.spot > p { color: var(--sub); margin-top: 12px; }
.spot ol { margin: 20px 0 0; padding-inline-start: 22px; display: grid; gap: 8px; }
.note { color: var(--sub); font-size: 14px; margin-top: 16px; }

.faqs { display: grid; gap: 12px; margin-top: 32px; max-width: 820px; }
.faq { background: var(--surface); border-radius: 16px; box-shadow: var(--shadow); }
.faq summary { cursor: pointer; list-style: none; padding: 20px 56px 20px 24px; font-weight: 600; position: relative; }
[dir="rtl"] .faq summary { padding: 20px 24px 20px 56px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; inset-inline-end: 24px; top: 50%; transform: translateY(-50%); color: var(--sub); font-size: 22px; font-weight: 400; }
.faq[open] summary::after { content: "–"; }
.faq p { padding: 0 24px 20px; color: var(--sub); }

.pcards { display: grid; gap: 12px; margin-top: 32px; }
@media (min-width: 600px) { .pcards { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 900px) { .pcards { grid-template-columns: repeat(3, 1fr); } .pcards--4 { grid-template-columns: repeat(4, 1fr); } }
.pcard { display: flex; flex-direction: column; gap: 4px; background: var(--surface); border-radius: 16px; padding: 20px; box-shadow: var(--shadow); color: var(--ink); }
.pcard:hover { text-decoration: none; transform: translateY(-1px); }
.pcard__k { color: var(--sub); font-size: 13px; }
.pcard__t { font-weight: 600; line-height: 1.3; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.chips a { background: var(--surface); color: var(--ink); padding: 8px 16px; border-radius: 999px; font-size: 15px; box-shadow: var(--shadow); }

/* ---------------------------------------------------------------- CTA */
.cta { margin: 32px 0 80px; background: var(--accent); color: #fff; border-radius: 32px; padding: 48px 32px; display: grid; gap: 32px; align-items: center; position: relative; overflow: hidden; }
@media (min-width: 760px) { .cta { grid-template-columns: 1fr auto; padding: 64px; } }
.cta::after { content: ""; position: absolute; width: 520px; height: 520px; border-radius: 50%; background: #3dbb95; inset-inline-end: -180px; bottom: -300px; opacity: .9; }
.cta > * { position: relative; z-index: 1; }
.cta__icon { border-radius: 16px; margin-bottom: 20px; box-shadow: 0 0 0 2px rgba(255,255,255,.3); }
.cta h2 { font-size: clamp(28px, 4vw, 44px); font-weight: 800; }
.cta p { margin-top: 12px; font-size: 19px; color: rgba(255,255,255,.88); max-width: 30em; }
.cta .badge { margin-top: 28px; border-color: rgba(255,255,255,.35); }
.cta__trust { list-style: none; padding: 0; margin: 20px 0 0; display: flex; flex-wrap: wrap; gap: 8px 20px; font-size: 14px; color: rgba(255,255,255,.88); }
.cta__trust li::before { content: "✓ "; font-weight: 700; }
.cta__qr { display: none; background: #fff; color: #111318; border-radius: 20px; padding: 16px; width: 164px; text-align: center; }
.cta__qr p { color: #5b6070; font-size: 12px; margin-top: 8px; line-height: 1.35; }
@media (min-width: 900px) and (hover: hover) { .cta__qr { display: block; } }

/* ------------------------------------------------------------- footer */
.foot { background: var(--surface); margin-top: 0; }
.foot__in { max-width: var(--max); margin: 0 auto; padding: 48px var(--gut) 24px; display: grid; gap: 32px; }
@media (min-width: 760px) { .foot__in { grid-template-columns: 1.4fr 1fr 1fr 1.2fr; } }
.foot__brand p { color: var(--sub); font-size: 15px; margin: 12px 0 20px; }
.foot__col { display: flex; flex-direction: column; gap: 12px; }
.foot__col a { color: var(--sub); font-size: 15px; }
.foot__col a:hover { color: var(--ink); }
.foot__base { max-width: var(--max); margin: 0 auto; padding: 20px var(--gut) 32px; display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: space-between; color: var(--sub); font-size: 12px; }
.foot__base a { color: var(--sub); }
.langs summary { cursor: pointer; color: var(--ink); font-size: 15px; font-weight: 600; }
.langs__list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px 16px; margin-top: 16px; }
.langs__list a { font-size: 14px; color: var(--sub); }
.langs__list a[aria-current] { color: var(--accent); font-weight: 600; }

/* ------------------------------------------------- sticky mobile CTA */
.sticky { display: none; }
@media (max-width: 760px) {
  .sticky { display: flex; align-items: center; gap: 12px; position: fixed; inset-inline: 12px; bottom: calc(12px + env(safe-area-inset-bottom)); z-index: 30; background: var(--surface); border-radius: 20px; padding: 10px 10px 10px 12px; box-shadow: 0 10px 40px rgba(17,19,24,.18), 0 0 0 1px var(--faint); transition: transform .25s ease, opacity .25s ease; }
  .sticky img { border-radius: 10px; }
  .sticky__t { display: flex; flex-direction: column; min-width: 0; line-height: 1.25; }
  .sticky__t b { font-size: 15px; }
  .sticky__t span { font-size: 12px; color: var(--sub); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  .sticky__btn { margin-inline-start: auto; background: var(--accent); color: var(--accent-ink); font-weight: 700; font-size: 15px; padding: 10px 16px; border-radius: 999px; white-space: nowrap; }
  .sticky.is-hidden { transform: translateY(140%); opacity: 0; pointer-events: none; }
  body { padding-bottom: 88px; }
}

/* ------------------------------------------------------ articles/blog */
.post { max-width: 760px; padding-top: 32px; padding-bottom: 64px; }
.crumbs { font-size: 14px; color: var(--sub); margin-bottom: 24px; }
.crumbs a { color: var(--sub); }
.post h1 { font-size: clamp(32px, 5vw, 46px); font-weight: 800; letter-spacing: -0.03em; }
.post__meta { color: var(--sub); font-size: 14px; margin-top: 16px; }
.post__lead { font-size: 21px; line-height: 1.5; margin-top: 24px; }
.tldr { background: var(--green-tint); border-radius: 16px; padding: 20px 24px; margin-top: 28px; }
.tldr__k { color: var(--green); font-weight: 700; font-size: 14px; margin-bottom: 6px; }
.toc { background: var(--surface); border-radius: 16px; padding: 20px 24px; margin-top: 28px; box-shadow: var(--shadow); }
.toc__k { font-weight: 700; font-size: 14px; color: var(--sub); }
.toc ol { margin: 8px 0 0; padding-inline-start: 20px; display: grid; gap: 4px; font-size: 16px; }
.post__body { margin-top: 12px; }
.post__body h2 { font-size: 28px; font-weight: 750; margin: 44px 0 12px; scroll-margin-top: 80px; }
.post__body h3 { font-size: 21px; margin: 28px 0 8px; }
.post__body p, .post__body li { font-size: 18px; line-height: 1.7; }
.post__body p { margin: 14px 0; }
.post__body ul, .post__body ol { padding-inline-start: 24px; display: grid; gap: 8px; margin: 16px 0; }
.post__body blockquote { margin: 24px 0; padding: 4px 20px; border-inline-start: 4px solid var(--accent); color: var(--sub); }
.tbl { overflow-x: auto; margin: 20px 0; }
.tbl table { border-collapse: collapse; width: 100%; font-size: 16px; background: var(--surface); border-radius: 12px; overflow: hidden; }
.tbl th, .tbl td { padding: 12px 16px; text-align: start; }
.tbl th { background: var(--accent-tint); font-weight: 600; }
.tbl tr:nth-child(even) td { background: color-mix(in srgb, var(--faint) 45%, transparent); }
.tool-link { margin-top: 24px; font-weight: 600; font-size: 18px; }
.appcard { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; background: var(--surface); border-radius: var(--r-card); padding: 20px; margin: 40px 0; box-shadow: var(--shadow); }
.appcard img { border-radius: 14px; }
.appcard__t { display: flex; flex-direction: column; flex: 1 1 200px; }
.appcard__t span { color: var(--sub); font-size: 14px; }
.post__faq { margin-top: 48px; }
.post__faq h2 { font-size: 28px; }
.post__faq .faqs { margin-top: 20px; }
.post__next { margin-top: 32px; color: var(--sub); }
.related { margin-top: 48px; }
.related h2 { font-size: 20px; }
.related ul { list-style: none; padding: 0; margin: 16px 0 0; display: grid; gap: 10px; }
.related a { font-weight: 500; }

.blog { padding-top: 40px; padding-bottom: 80px; }
.blog h1 { font-size: clamp(34px, 5vw, 52px); font-weight: 800; letter-spacing: -0.03em; }
.bcards { display: grid; gap: 16px; margin-top: 40px; }
@media (min-width: 760px) { .bcards { grid-template-columns: repeat(2, 1fr); } }
.bcard { display: flex; flex-direction: column; gap: 8px; background: var(--surface); border-radius: var(--r-card); padding: 24px; box-shadow: var(--shadow); color: var(--ink); }
.bcard:hover { text-decoration: none; transform: translateY(-1px); }
.bcard__t { font-size: 20px; font-weight: 700; line-height: 1.25; letter-spacing: -0.01em; }
.bcard__d { color: var(--sub); font-size: 15px; }

.terms { margin: 32px 0 0; }
.term { padding: 20px 0; }
.term h2 { font-size: 22px; }
.term dd { margin: 8px 0 0; color: var(--sub); font-size: 18px; line-height: 1.65; }

/* ---------------------------------------------------------- calculators */
.tool__box { background: var(--surface); border-radius: 24px; padding: 24px; margin-top: 32px; box-shadow: var(--shadow); display: grid; gap: 16px; }
.tool__units { display: inline-flex; background: var(--faint); border-radius: 12px; padding: 4px; gap: 4px; justify-self: start; }
.tool__units button { border: 0; background: transparent; color: var(--sub); font: 600 15px var(--font); padding: 8px 16px; border-radius: 8px; cursor: pointer; }
.tool__units button.on { background: var(--surface); color: var(--ink); box-shadow: 0 1px 3px rgba(0,0,0,.12); }
.tool__row { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); }
.tool__field { display: flex; flex-direction: column; gap: 6px; background: var(--bg); border-radius: var(--r-field); padding: 10px 14px; }
.tool__field label { font-size: 13px; color: var(--sub); font-weight: 500; }
.tool__field input, .tool__field select { border: 0; background: transparent; color: var(--ink); font: 600 19px var(--font); padding: 0; width: 100%; outline: none; }
.tool__field select { font-size: 16px; }
.tool__btn, .tool__box button[type="submit"] { background: var(--accent); color: var(--accent-ink); border: 0; border-radius: 999px; font: 700 17px var(--font); padding: 14px 24px; cursor: pointer; }
.tool__result { display: none; background: var(--accent-tint); border-radius: 16px; padding: 20px; }
.tool__result.show { display: block; }
.tool__result__label { font-size: 14px; color: var(--sub); font-weight: 600; }
.tool__result__big { font-size: 44px; font-weight: 800; letter-spacing: -0.03em; color: var(--accent); line-height: 1.1; margin: 4px 0 8px; }
.tool__result p { margin-top: 6px; }
.post.tool .post__body h2 { font-size: 24px; }

/* ------------------------------------------------------ consent banner */
#sml-consent { position: fixed; inset-inline: 12px; bottom: calc(12px + env(safe-area-inset-bottom)); z-index: 50; display: flex; justify-content: center; }
.sml-c__in { background: var(--surface); color: var(--ink); border-radius: 20px; padding: 20px; max-width: 640px; box-shadow: 0 10px 40px rgba(0,0,0,.2), 0 0 0 1px var(--faint); display: flex; flex-wrap: wrap; gap: 16px; align-items: center; }
.sml-c__in p { font-size: 14px; color: var(--sub); flex: 1 1 280px; }
.sml-c__btns { display: flex; gap: 8px; margin-inline-start: auto; }
.sml-c__btns button { border: 0; border-radius: 999px; padding: 10px 18px; font: 600 15px var(--font); cursor: pointer; background: var(--faint); color: var(--ink); }
.sml-c__btns #sml-accept { background: var(--accent); color: var(--accent-ink); }

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; } }

/* ------------------------------------------------------ small screens */
html, body { overflow-x: clip; }
@media (max-width: 759px) {
  .step { flex-direction: row; align-items: center; gap: 16px; }
  .step .phone--sm { width: 116px; flex: none; border-radius: 22px; padding: 4px; }
  .step .phone--sm img { border-radius: 18px; }
  .steps { gap: 20px; }
}
.sources { margin-top: 40px; }
.sources h2 { font-size: 16px; color: var(--sub); }
.sources ol { margin: 8px 0 0; padding-inline-start: 20px; font-size: 14px; display: grid; gap: 4px; }
.sources a { color: var(--sub); text-decoration: underline; }