/* ============================================================
   Rootborn — "Strata" design system
   Dark ink base, ember accents, sediment-line motif.
   Fraunces (display) / Instrument Sans (body) / JetBrains Mono (data).
   ============================================================ */
:root{
  --ink-0:#070a12;
  --ink-1:#0a0d16;
  --ink-2:#10141f;
  --ink-3:#171c2b;
  --line:#232a3d;
  --line-soft:#1a2030;
  --text:#e8e4d8;
  --text-dim:#9aa0b4;
  --text-faint:#5d6478;
  --ember:#ff7a3c;
  --ember-hi:#ffa477;
  --ember-deep:#c2511c;
  --amber:#ffb454;
  --moss:#7fc98f;
  --rust:#e05f5f;
  --gold:#e8c979;
  --font-display:"Fraunces",Georgia,serif;
  --font-body:"Instrument Sans",system-ui,sans-serif;
  --font-mono:"JetBrains Mono",monospace;
  --radius:14px;
  --radius-lg:22px;
  --sat:env(safe-area-inset-top,0px);
  --sab:env(safe-area-inset-bottom,0px);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  background:var(--ink-1);color:var(--text);
  font-family:var(--font-body);font-size:16px;line-height:1.55;
  min-height:100dvh;overflow-x:hidden;
}
::selection{background:var(--ember);color:var(--ink-0)}
a{color:var(--ember-hi);text-decoration:none}
button{font-family:inherit;cursor:pointer}
img{max-width:100%}
.grain{position:fixed;inset:0;pointer-events:none;z-index:60;opacity:.05;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2'/%3E%3C/filter%3E%3Crect width='120' height='120' filter='url(%23n)' opacity='.9'/%3E%3C/svg%3E");}
.strata-bg{position:fixed;inset:0;z-index:0;color:var(--line);opacity:.5;pointer-events:none}

/* ---------- top bar ---------- */
.topbar{
  position:sticky;top:0;z-index:50;display:flex;align-items:center;justify-content:space-between;
  padding:calc(10px + var(--sat)) 18px 10px;
  background:color-mix(in srgb,var(--ink-1) 82%,transparent);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line-soft);
}
.brand{display:flex;align-items:center;gap:10px}
.brand-mark{border-radius:8px}
.brand-name{font-family:var(--font-display);font-size:1.25rem;font-weight:400;letter-spacing:.01em;color:var(--text)}
.brand-name b{font-weight:700;color:var(--ember)}
.topnav{display:flex;gap:2px;align-items:center}
.topnav a{
  color:var(--text-dim);font-size:.86rem;font-weight:500;padding:7px 11px;border-radius:99px;
  transition:color .15s,background .15s;
}
.topnav a:hover{color:var(--text)}
.topnav a.active{color:var(--ink-0);background:var(--text)}
@media(max-width:700px){.topnav{display:none}}

/* ---------- app shell ---------- */
.app{position:relative;z-index:1;outline:none;min-height:60dvh;padding-bottom:110px}
@media(max-width:700px){.app{padding-bottom:140px}}
.page{max-width:1080px;margin:0 auto;padding:26px 18px 40px}
@media(min-width:760px){.page{padding:44px 32px 60px}}
.page-head h1{font-family:var(--font-display);font-weight:600;font-size:clamp(1.7rem,4.5vw,2.6rem);letter-spacing:-.01em;line-height:1.1}
.page-head .lede{color:var(--text-dim);max-width:56ch;margin-top:10px}
.eyebrow{font-family:var(--font-mono);font-size:.7rem;font-weight:600;letter-spacing:.22em;text-transform:uppercase;color:var(--ember);margin-bottom:14px;display:flex;align-items:center;gap:10px}
.eyebrow::after{content:"";height:1px;flex:0 0 44px;background:linear-gradient(90deg,var(--ember),transparent)}

/* ---------- hero ---------- */
.hero{position:relative;padding:calc(46px + var(--sat)) 18px 30px;max-width:1080px;margin:0 auto}
.hero-kicker{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.24em;text-transform:uppercase;color:var(--amber);display:flex;gap:10px;align-items:center}
.hero-kicker::before{content:"";width:34px;height:1px;background:var(--amber)}
.hero h1{
  font-family:var(--font-display);font-weight:400;font-size:clamp(2.5rem,8.5vw,4.6rem);
  line-height:1.02;letter-spacing:-.015em;margin:16px 0 6px;
}
.hero h1 em{font-style:italic;color:var(--ember-hi)}
.hero .sub{color:var(--text-dim);font-size:1.02rem;max-width:46ch;margin-top:14px}
.hero-cta{display:flex;gap:12px;margin-top:26px;flex-wrap:wrap}
.hero-stats{display:flex;gap:0;margin-top:40px;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:color-mix(in srgb,var(--ink-2) 70%,transparent)}
.hero-stats>div{flex:1;padding:14px 16px;border-right:1px solid var(--line-soft)}
.hero-stats>div:last-child{border-right:0}
.hero-stats b{font-family:var(--font-mono);font-size:1.25rem;color:var(--text);display:block}
.hero-stats span{font-size:.72rem;color:var(--text-faint);text-transform:uppercase;letter-spacing:.08em}
@media(max-width:560px){.hero-stats>div{padding:11px 10px}.hero-stats b{font-size:1rem}}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;border-radius:99px;border:1px solid var(--line);
  background:var(--ink-3);color:var(--text);font-weight:600;font-size:.92rem;
  padding:11px 20px;transition:transform .12s,background .15s,border-color .15s;
}
.btn:hover{border-color:var(--text-faint)}
.btn:active{transform:scale(.97)}
.btn-ember{background:linear-gradient(160deg,var(--ember) 0%,var(--ember-deep) 100%);border-color:transparent;color:#1b0d05;box-shadow:0 4px 22px -6px rgba(255,122,60,.55)}
.btn-ember:hover{filter:brightness(1.08)}
.btn-ghost{background:transparent}
.btn-block{width:100%;justify-content:center}

/* ---------- cards ---------- */
.card{
  background:linear-gradient(170deg,var(--ink-2),var(--ink-1) 70%);
  border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:22px;position:relative;
}
.card+.card{margin-top:14px}
.card h3{font-family:var(--font-display);font-weight:600;font-size:1.2rem;letter-spacing:-.01em}
@media(min-width:860px){
  .cols-2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
  .cols-2 .card+.card{margin-top:0}
  .cols-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
  .cols-3 .card+.card{margin-top:0}
}

/* ---------- domain cards ---------- */
.dom-grid{display:grid;grid-template-columns:1fr;gap:14px}
@media(min-width:640px){.dom-grid{grid-template-columns:1fr 1fr}}
@media(min-width:1000px){.dom-grid{grid-template-columns:1fr 1fr 1fr}}
.dom-card{
  background:linear-gradient(165deg,var(--ink-2),var(--ink-1) 80%);
  border:1px solid var(--line);border-radius:var(--radius-lg);
  overflow:hidden;transition:border-color .15s,transform .15s;
  display:flex;flex-direction:column;
}
.dom-card:hover{border-color:var(--ember-deep);transform:translateY(-2px)}
.dom-top{padding:18px 18px 12px;display:flex;justify-content:space-between;align-items:flex-start;gap:10px}
.dom-name{font-family:var(--font-mono);font-weight:700;font-size:1.06rem;word-break:break-all;line-height:1.25}
.dom-name .tld{color:var(--text-faint)}
.score-ring{flex:0 0 auto}
.fav-btn{background:none;border:0;color:var(--text-faint);font-size:1.25rem;line-height:1;padding:2px 4px;transition:color .15s,transform .15s}
.fav-btn:active{transform:scale(1.3)}
.fav-btn.on{color:var(--amber)}
.dom-mid{padding:0 18px 14px;flex:1}
.dom-chips{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:10px}
.chip{font-family:var(--font-mono);font-size:.68rem;font-weight:600;letter-spacing:.02em;padding:3px 9px;border-radius:99px;border:1px solid var(--line);color:var(--text-dim);background:var(--ink-3)}
.chip.topic{color:var(--amber);border-color:color-mix(in srgb,var(--amber) 40%,transparent)}
.chip.years{color:var(--moss);border-color:color-mix(in srgb,var(--moss) 35%,transparent)}
.chip.budget-premium{color:var(--gold);border-color:color-mix(in srgb,var(--gold) 45%,transparent)}
.chip.budget-standard{color:var(--ember-hi);border-color:color-mix(in srgb,var(--ember) 45%,transparent)}
.dom-title{font-size:.84rem;color:var(--text-dim);font-style:italic;font-family:var(--font-display)}
.dom-high{margin:10px 0 0;padding:0;list-style:none}
.dom-high li{font-size:.8rem;color:var(--text-dim);padding-left:16px;position:relative;margin-bottom:3px}
.dom-high li::before{content:"";position:absolute;left:0;top:.5em;width:7px;height:7px;border-radius:2px;background:var(--ember-deep);transform:rotate(45deg)}
.dom-foot{border-top:1px solid var(--line-soft);padding:12px 18px;display:flex;align-items:center;justify-content:space-between;gap:8px}
.verified{font-family:var(--font-mono);font-size:.66rem;color:var(--moss);display:flex;align-items:center;gap:5px}
.verified::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--moss);box-shadow:0 0 8px var(--moss)}

/* ---------- score ring ---------- */
.score-ring{position:relative;width:46px;height:46px}
.score-ring svg{transform:rotate(-90deg)}
.score-ring .bg{stroke:var(--line)}
.score-ring .fg{stroke:var(--ember);stroke-linecap:round;transition:stroke-dashoffset 1s cubic-bezier(.2,.8,.2,1)}
.score-ring text{font-family:var(--font-mono);font-size:13px;font-weight:700;fill:var(--text)}
.score-ring.hi .fg{stroke:var(--moss)}
.score-ring.mid .fg{stroke:var(--amber)}

/* ---------- filters ---------- */
.filters{display:flex;gap:8px;overflow-x:auto;padding:6px 2px 14px;-webkit-overflow-scrolling:touch;scrollbar-width:none}
.filters::-webkit-scrollbar{display:none}
.fbtn{
  flex:0 0 auto;font-family:var(--font-mono);font-size:.74rem;font-weight:600;letter-spacing:.02em;
  padding:8px 15px;border-radius:99px;border:1px solid var(--line);background:transparent;color:var(--text-dim);
  transition:all .15s;
}
.fbtn.on{background:var(--text);color:var(--ink-0);border-color:var(--text)}

/* ---------- checker ---------- */
.check-form{display:flex;gap:10px;margin:20px 0 8px}
.check-input{
  flex:1;min-width:0;background:var(--ink-2);border:1px solid var(--line);border-radius:var(--radius);
  color:var(--text);font-family:var(--font-mono);font-size:1.05rem;padding:14px 16px;outline:none;
  transition:border-color .15s,box-shadow .15s;
}
.check-input:focus{border-color:var(--ember);box-shadow:0 0 0 3px rgba(255,122,60,.15)}
.check-input::placeholder{color:var(--text-faint)}
.check-state{margin-top:22px}
.scanline{height:2px;background:linear-gradient(90deg,transparent,var(--ember),transparent);background-size:50% 100%;animation:scan 1.2s linear infinite;border-radius:2px;margin:26px 0}
@keyframes scan{0%{background-position:-50% 0}100%{background-position:150% 0}}
.check-error{color:var(--rust);font-size:.9rem;margin-top:14px}

.result-head{display:flex;align-items:center;gap:14px;margin-bottom:6px;flex-wrap:wrap}
.status-pill{font-family:var(--font-mono);font-size:.72rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;padding:5px 12px;border-radius:99px}
.status-available{background:rgba(127,201,143,.14);color:var(--moss);border:1px solid rgba(127,201,143,.4)}
.status-registered{background:rgba(224,95,95,.12);color:var(--rust);border:1px solid rgba(224,95,95,.35)}
.status-unknown{background:rgba(255,180,84,.1);color:var(--amber);border:1px solid rgba(255,180,84,.3)}
.result-domain{font-family:var(--font-mono);font-weight:700;font-size:clamp(1.3rem,5vw,1.9rem);word-break:break-all}
.check-time{font-family:var(--font-mono);font-size:.7rem;color:var(--text-faint);margin:4px 0 18px}
.strata-card{overflow:hidden;padding:0}
.strata-card .strata-head{padding:16px 20px 0}
.strata-card h4{font-family:var(--font-mono);font-size:.72rem;font-weight:700;letter-spacing:.18em;text-transform:uppercase;color:var(--text-faint)}
.yearbands{display:flex;flex-wrap:wrap;gap:5px;padding:14px 20px 20px}
.yearband{
  font-family:var(--font-mono);font-size:.72rem;font-weight:600;padding:5px 9px;border-radius:6px;
  background:var(--ink-3);color:var(--text-dim);border:1px solid var(--line-soft);
}
.yearband.gap{opacity:.45;border-style:dashed}
.yearband.hot{color:var(--ink-0);background:var(--ember);border-color:var(--ember);font-weight:700}
.meta-rows{display:grid;grid-template-columns:auto 1fr;gap:8px 18px;padding:16px 20px;font-size:.9rem}
.meta-rows dt{font-family:var(--font-mono);font-size:.68rem;text-transform:uppercase;letter-spacing:.12em;color:var(--text-faint);align-self:center}
.meta-rows dd{color:var(--text)}
.risk-flag{display:flex;gap:10px;align-items:flex-start;padding:10px 0;border-bottom:1px solid var(--line-soft)}
.risk-flag:last-child{border-bottom:0}
.risk-dot{flex:0 0 8px;height:8px;border-radius:50%;margin-top:6px}
.risk-high .risk-dot{background:var(--rust);box-shadow:0 0 10px var(--rust)}
.risk-warn .risk-dot{background:var(--amber)}
.risk-info .risk-dot{background:var(--text-faint)}
.risk-flag b{font-size:.86rem;display:block}
.risk-flag p{font-size:.78rem;color:var(--text-dim)}
.big-score{display:flex;align-items:center;gap:16px;padding:18px 20px}
.big-score p{font-size:.78rem;color:var(--text-dim)}
.big-score .score-ring{width:64px;height:64px}
.big-score .score-ring text{font-size:17px}
.trust-legend{font-size:.72rem;color:var(--text-faint);padding:0 20px 16px;font-family:var(--font-mono)}
.snapshot-link{font-family:var(--font-mono);font-size:.78rem;word-break:break-all}
.check-cta{display:flex;gap:10px;padding:6px 20px 20px;flex-wrap:wrap}

/* ---------- partner ---------- */
.partner-hero{display:flex;gap:16px;align-items:flex-start}
.partner-badge{font-family:var(--font-mono);font-size:.64rem;letter-spacing:.14em;text-transform:uppercase;color:var(--amber);border:1px solid rgba(255,180,84,.35);border-radius:99px;padding:4px 10px;display:inline-flex;align-items:center;gap:6px}
.partner-badge::before{content:"◆";font-size:.6rem}
.price-tag{font-family:var(--font-mono);font-weight:700;font-size:1.35rem;color:var(--gold);white-space:nowrap;display:inline-block}
.price-note{display:block;font-size:.74rem;color:var(--text-faint);font-family:var(--font-mono);margin-top:3px;line-height:1.5}
.partner-card.highlight{border-color:color-mix(in srgb,var(--amber) 30%,var(--line))}
.partner-disclosure{font-size:.78rem;color:var(--text-dim);border:1px dashed var(--line);border-radius:var(--radius);padding:14px 16px;margin:18px 0;background:rgba(255,180,84,.04)}
.partner-card.featured{border-color:color-mix(in srgb,var(--ember) 35%,var(--line));}
.partner-card.featured::after{content:"Most used";position:absolute;top:14px;right:14px;font-family:var(--font-mono);font-size:.6rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-0);background:var(--amber);padding:3px 9px;border-radius:99px}

/* ---------- guides / prose ---------- */
.prose{max-width:62ch}
.prose h2{font-family:var(--font-display);font-weight:600;font-size:1.45rem;margin:34px 0 12px}
.prose h2:first-child{margin-top:0}
.prose p{color:var(--text-dim);margin-bottom:14px}
.prose strong{color:var(--text)}
.prose ul{margin:0 0 14px 20px;color:var(--text-dim)}
.prose li{margin-bottom:6px}
.prose .callout{border-left:3px solid var(--ember);background:rgba(255,122,60,.06);padding:14px 16px;border-radius:0 var(--radius) var(--radius) 0;color:var(--text);margin:18px 0;font-size:.95rem}
.guide-nav{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:26px}

/* ---------- favorites ---------- */
.empty{ text-align:center;padding:70px 20px;color:var(--text-faint)}
.empty .big{font-size:2.6rem;margin-bottom:10px}
.empty p{max-width:36ch;margin:0 auto 18px}

/* ---------- tab bar (mobile) ---------- */
.tabbar{
  position:fixed;left:0;right:0;bottom:0;z-index:55;display:none;
  grid-template-columns:repeat(5,1fr);
  padding:6px 8px calc(6px + var(--sab));
  background:color-mix(in srgb,var(--ink-1) 88%,transparent);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-top:1px solid var(--line-soft);
}
@media(max-width:700px){.tabbar{display:grid}}
.tabbar a{display:flex;flex-direction:column;align-items:center;gap:3px;padding:7px 4px;color:var(--text-faint);font-size:.62rem;font-weight:600;letter-spacing:.04em;border-radius:12px;transition:color .15s}
.tabbar a svg{width:21px;height:21px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.tabbar a.active{color:var(--text)}
.tabbar .tab-cta.active{color:var(--ember)}
.tabbar .tab-cta svg{stroke-width:2.2}

/* ---------- footer ---------- */
.footer{position:relative;z-index:1;border-top:1px solid var(--line-soft);padding:34px 20px 120px;margin-top:30px}
@media(min-width:701px){.footer{padding-bottom:44px}}
.footer-in{max-width:1080px;margin:0 auto}
.foot-brand{font-family:var(--font-display);font-size:1.1rem;margin-bottom:6px}
.foot-brand b{color:var(--ember)}
.footer p{color:var(--text-faint);font-size:.8rem;margin-bottom:6px}
.foot-fine{font-size:.68rem !important;line-height:1.6;max-width:78ch}

/* ---------- install banner (3 variantes) + feuille d'instructions ---------- */
.install-banner{
  position:fixed;left:12px;right:12px;bottom:calc(86px + var(--sab));z-index:70;
  display:flex;align-items:center;gap:12px;
  background:var(--ink-3);border:1px solid var(--ember-deep);border-radius:var(--radius);
  padding:14px;box-shadow:0 12px 40px -10px rgba(0,0,0,.7);
  animation:rise .4s cubic-bezier(.2,.8,.2,1);
}
.install-banner img{border-radius:10px;flex:0 0 auto}
.install-banner .ib-txt{flex:1;min-width:0;font-size:.88rem;line-height:1.3}
.install-banner .ib-txt span{display:block;color:var(--text-dim);font-size:.74rem;margin-top:2px}
.ib-cta{flex:0 0 auto;min-height:44px;min-width:88px;justify-content:center;padding:10px 18px}
.ib-how{background:var(--ink-2)}
.ib-close{
  flex:0 0 auto;width:44px;height:44px;margin:-6px -8px -6px 0;
  background:none;border:0;color:var(--text-faint);font-size:1.6rem;line-height:1;
}
@keyframes rise{from{transform:translateY(20px);opacity:0}to{transform:none;opacity:1}}
@media(min-width:701px){.install-banner{left:auto;right:24px;bottom:24px;width:400px}}

.sheet-backdrop,.sheet-backdrop[hidden]{
  position:fixed;inset:0;z-index:90;background:rgba(4,6,12,.72);
  backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);
  display:flex;align-items:flex-end;justify-content:center;
}
.sheet{
  position:relative;width:100%;max-width:520px;max-height:86dvh;overflow:auto;
  background:linear-gradient(170deg,var(--ink-3),var(--ink-1) 60%);
  border:1px solid var(--line);border-bottom:0;border-radius:22px 22px 0 0;
  padding:26px 22px calc(26px + var(--sab));
  animation:rise .35s cubic-bezier(.2,.8,.2,1);
}
@media(min-width:701px){.sheet-backdrop{align-items:center}.sheet{border-radius:22px;border-bottom:1px solid var(--line)}}
.sheet-backdrop[hidden]{display:none !important}
.sheet-close{
  position:absolute;top:10px;right:10px;width:44px;height:44px;
  background:none;border:0;color:var(--text-faint);font-size:1.7rem;line-height:1;
}
.sheet-body img{border-radius:14px;margin-bottom:14px}
.sheet-body h3{font-family:var(--font-display);font-size:1.35rem;font-weight:600;margin-bottom:18px;padding-right:40px}
.sheet-body ol{list-style:none;margin:0 0 22px;display:grid;gap:14px}
.sheet-body li{display:flex;gap:14px;align-items:flex-start;font-size:.95rem;color:var(--text-dim);line-height:1.45}
.sheet-body li b{color:var(--text)}
.step-n{
  flex:0 0 30px;height:30px;display:grid;place-items:center;border-radius:50%;
  background:var(--ember-deep);color:#fff;font-family:var(--font-mono);font-weight:700;font-size:.85rem;
}
.share-ico{display:inline-grid;place-items:center;width:22px;height:22px;border-radius:6px;background:var(--text);color:var(--ink-0);font-size:.7rem;vertical-align:-3px}

/* ---------- toast ---------- */
.toast{
  position:fixed;left:50%;transform:translateX(-50%);bottom:calc(150px + var(--sab));z-index:80;
  background:var(--text);color:var(--ink-0);font-size:.85rem;font-weight:600;
  padding:10px 18px;border-radius:99px;box-shadow:0 8px 30px rgba(0,0,0,.5);
  animation:rise .3s ease;pointer-events:none;
}

/* ---------- reveal animation ---------- */
.reveal{animation:reveal .55s cubic-bezier(.2,.8,.2,1) both}
@keyframes reveal{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
.stagger>*{animation:reveal .5s cubic-bezier(.2,.8,.2,1) both}
.stagger>*:nth-child(2){animation-delay:.06s}
.stagger>*:nth-child(3){animation-delay:.12s}
.stagger>*:nth-child(4){animation-delay:.18s}
.stagger>*:nth-child(5){animation-delay:.24s}
.stagger>*:nth-child(6){animation-delay:.3s}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}