/* ============================================================
   CorpGPT — корпоративный ИИ в вашем контуре
   Design system — LIGHT editorial (default) + dark alternate
   Shared across landing + legal pages
   ============================================================ */

:root{
  /* surfaces — paper-light, calm */
  --paper:    #ffffff;
  --bg:       #ffffff;
  --surface:  #f6f6f4;   /* off-white section */
  --surface-2:#efefea;
  --panel:    #ffffff;
  --panel-2:  #faf9f7;
  --panel-3:  #f1f1ee;
  --line:     rgba(13,13,13,.10);
  --line-2:   rgba(13,13,13,.16);
  --line-3:   rgba(13,13,13,.26);
  /* ink */
  --ink:      #0d0d0d;
  --text:     #16160f;
  --muted:    #5f5f58;
  --muted-2:  #97978e;
  /* accent (used sparingly: eyebrow, links, marks, focus) */
  --accent:    #2f6bff;
  --accent-2:  #11a37a;
  --accent-soft: rgba(47,107,255,.10);
  --accent-line: rgba(47,107,255,.32);
  --accent-ink:  #2f6bff;   /* text-on-paper accent (kept readable) */
  --good:      #11a37a;
  --warn:      #c8821f;
  /* primary-button tokens (flip per theme at root level) */
  --btn-bg:    var(--ink);
  --btn-bg-h:  #000000;
  --btn-fg:    #ffffff;
  --btn-border:var(--ink);
  /* product-frame ink (mock/form keep light cool surface) */
  --logo-ink:  #0d0d0d;
  /* shape */
  --r-sm: 10px;
  --r:    14px;
  --r-lg: 20px;
  --r-xl: 26px;
  --maxw: 1180px;
  --shadow:    0 30px 60px -34px rgba(20,22,30,.30);
  --shadow-sm: 0 14px 34px -22px rgba(20,22,30,.28);
  --glow: 0 0 0 1px var(--accent-line);
  --ease: cubic-bezier(.2,.7,.2,1);
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; scroll-padding-top:84px; -webkit-text-size-adjust:100%; }
body{
  margin:0;
  font-family:"Manrope", system-ui, sans-serif;
  background:var(--bg);
  color:var(--text);
  font-size:17px;
  line-height:1.6;
  letter-spacing:-.011em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
body::before{
  /* faint ambient wash near the top */
  content:"";
  position:fixed; inset:0; z-index:-2;
  background:
    radial-gradient(1100px 540px at 82% -12%, var(--accent-soft), transparent 60%),
    linear-gradient(180deg, #fbfbfa 0%, var(--bg) 30%);
}
body::after{
  content:""; position:fixed; inset:0; z-index:-1; pointer-events:none;
  background-image:
    linear-gradient(rgba(13,13,13,.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(13,13,13,.028) 1px, transparent 1px);
  background-size:72px 72px;
  mask-image:radial-gradient(120% 78% at 50% 0%, #000 26%, transparent 76%);
}

a{ color:inherit; text-decoration:none; }
img{ max-width:100%; display:block; }
::selection{ background:var(--accent-soft); color:var(--ink); }

/* ---------- layout ---------- */
.wrap{ width:100%; max-width:var(--maxw); margin:0 auto; padding:0 28px; }
.section{ padding:112px 0; position:relative; }
.section--tight{ padding:64px 0; }
.section--alt{ background:var(--surface); border-top:1px solid var(--line); border-bottom:1px solid var(--line); }
@media (max-width:760px){ .section{ padding:76px 0; } .wrap{ padding:0 20px; } }

/* ---------- type ---------- */
h1,h2,h3,h4{ margin:0; font-weight:800; letter-spacing:-.03em; line-height:1.04; font-family:var(--font-head, "Manrope"), system-ui, sans-serif; }
.h1{ font-size:clamp(42px,6.2vw,78px); line-height:.98; letter-spacing:-.04em; }
.h2{ font-size:clamp(31px,4.4vw,52px); line-height:1.04; letter-spacing:-.035em; }
.h3{ font-size:clamp(20px,2.4vw,26px); letter-spacing:-.02em; }
.lead{ font-size:clamp(18px,2vw,21px); color:var(--muted); line-height:1.55; font-weight:500; }
.accent-ink{ color:var(--accent-ink); }
.muted{ color:var(--muted); }

/* eyebrow / mono label */
.eyebrow{
  display:inline-flex; align-items:center; gap:9px;
  font-family:"JetBrains Mono", monospace;
  font-size:12px; font-weight:500; letter-spacing:.14em; text-transform:uppercase;
  color:var(--muted);
}
.eyebrow::before{ content:""; width:18px; height:1px; background:var(--line-3); }
.eyebrow.is-center{ justify-content:center; }
.mono{ font-family:"JetBrains Mono", monospace; font-weight:500; letter-spacing:.02em; }

.section-head{ max-width:760px; margin-bottom:56px; }
.section-head.is-center{ margin-left:auto; margin-right:auto; text-align:center; }
.section-head .h2{ margin:18px 0 0; }
.section-head .lead{ margin-top:20px; }

/* ---------- buttons ---------- */
.btn{
  --bw:1px;
  display:inline-flex; align-items:center; justify-content:center; gap:9px;
  font-family:inherit; font-weight:650; font-size:15.5px; letter-spacing:-.01em;
  padding:13px 22px; border-radius:999px; cursor:pointer; border:var(--bw) solid transparent;
  transition:transform .18s var(--ease), border-color .2s, box-shadow .25s;
  white-space:nowrap; user-select:none;
}
.btn:active{ transform:translateY(1px); }
.btn-primary{
  color:var(--btn-fg);
  background:var(--btn-bg);
  border-color:var(--btn-border);
}
.btn-primary:hover{ background:var(--btn-bg-h); transform:translateY(-1px); box-shadow:0 14px 30px -14px rgba(13,13,13,.5); }
.btn-ghost{
  color:var(--ink); background:transparent; border-color:var(--line-2);
}
.btn-ghost:hover{ border-color:var(--ink); background:rgba(13,13,13,.04); transform:translateY(-1px); }
.btn-lg{ padding:16px 28px; font-size:16.5px; }
.btn-block{ width:100%; }
.arrow{ transition:transform .2s var(--ease); }
.btn:hover .arrow{ transform:translateX(3px); }

/* ---------- chips / pills ---------- */
.chip{
  display:inline-flex; align-items:center; gap:7px;
  padding:7px 13px; border-radius:999px;
  background:var(--paper); border:1px solid var(--line);
  font-size:13.5px; font-weight:600; color:var(--muted);
  transition:border-color .2s, color .2s, background .2s;
}
.chip:hover{ color:var(--ink); border-color:var(--line-2); }
.chip .dot{ width:6px; height:6px; border-radius:50%; background:var(--accent); }
.chip-row{ display:flex; flex-wrap:wrap; gap:9px; }

/* ---------- generic card ---------- */
.card{
  position:relative;
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:28px;
  transition:border-color .25s, transform .25s var(--ease), box-shadow .25s;
}
.card:hover{ border-color:var(--line-2); transform:translateY(-3px); box-shadow:var(--shadow-sm); }
.section--alt .card{ background:var(--paper); }

/* ============================================================
   HEADER
   ============================================================ */
.site-header{
  position:sticky; top:0; z-index:60;
  border-bottom:1px solid transparent;
  transition:background .3s, border-color .3s, backdrop-filter .3s;
}
.site-header.scrolled{
  background:rgba(255,255,255,.78);
  backdrop-filter:blur(16px) saturate(140%);
  border-bottom-color:var(--line);
}
.nav{ display:flex; align-items:center; gap:22px; height:72px; }
.brand{ display:inline-flex; align-items:center; gap:11px; font-weight:800; letter-spacing:-.035em; font-size:19px; color:var(--ink); }
.brand .logo-mark{ width:30px; height:30px; flex:none; }
.brand .logo-mark path{ stroke:var(--logo-ink); }
.brand small{ display:block; font-family:"JetBrains Mono",monospace; font-weight:500; font-size:9.5px; letter-spacing:.14em; text-transform:uppercase; color:var(--muted-2); margin-top:2px; white-space:nowrap; }
.brand .brand-text{ line-height:1; }
.nav-links{ display:flex; align-items:center; gap:2px; margin-left:14px; }
.nav-links a{
  padding:9px 13px; border-radius:999px; font-size:14.5px; font-weight:600; color:var(--muted);
  transition:color .2s, background .2s;
}
.nav-links a:hover{ color:var(--ink); background:rgba(13,13,13,.05); }
.nav-spacer{ flex:1; }
.nav-cta{ display:flex; align-items:center; gap:10px; }
.burger{ display:none; width:42px; height:42px; border-radius:12px; border:1px solid var(--line-2); background:var(--paper); align-items:center; justify-content:center; cursor:pointer; }
.burger span{ display:block; width:18px; height:2px; background:var(--ink); position:relative; }
.burger span::before,.burger span::after{ content:""; position:absolute; left:0; width:18px; height:2px; background:var(--ink); }
.burger span::before{ top:-6px; } .burger span::after{ top:6px; }

@media (max-width:980px){
  .nav-links{ display:none; }
  .burger{ display:inline-flex; }
}

/* mobile sheet */
.m-menu{ position:fixed; inset:72px 0 auto 0; z-index:55; background:rgba(255,255,255,.97); backdrop-filter:blur(16px); border-bottom:1px solid var(--line); padding:14px 20px 22px; display:none; }
.m-menu.open{ display:block; }
.m-menu a{ display:block; padding:13px 6px; font-size:16px; font-weight:600; border-bottom:1px solid var(--line); color:var(--muted); }
.m-menu a:last-of-type{ border-bottom:none; }
.m-menu .btn{ margin-top:14px; }

/* ============================================================
   HERO
   ============================================================ */
.hero{ padding:72px 0 96px; position:relative; }
.hero-grid{ display:grid; grid-template-columns:1.05fr .95fr; gap:60px; align-items:center; }
@media (max-width:980px){ .hero-grid{ grid-template-columns:1fr; gap:46px; } }

.hero-badge{
  display:inline-flex; align-items:center; gap:10px; padding:6px 6px 6px 14px; border-radius:999px;
  background:var(--paper); border:1px solid var(--line); font-size:13.5px; color:var(--muted); font-weight:600;
  margin-bottom:28px; box-shadow:var(--shadow-sm);
}
.hero-badge b{ color:var(--ink); font-weight:700; }
.hero-badge .tag{ font-family:"JetBrains Mono",monospace; font-size:11px; letter-spacing:.06em; padding:4px 9px; border-radius:999px; background:var(--ink); color:var(--paper); }
.hero h1{ margin:0 0 24px; color:var(--ink); }
.hero .lead{ max-width:560px; margin:0 0 14px; }
.hero .privacy-note{ display:inline-flex; align-items:center; gap:9px; color:var(--ink); font-weight:600; font-size:15px; margin:8px 0 32px; }
.hero .privacy-note svg{ color:var(--accent); }
.hero-cta{ display:flex; flex-wrap:wrap; gap:13px; align-items:center; }
.hero-meta{ display:flex; flex-wrap:wrap; gap:40px; margin-top:38px; padding-top:30px; border-top:1px solid var(--line); }
.hero-meta div{ display:flex; flex-direction:column; gap:3px; }
.hero-meta b{ font-size:25px; font-weight:800; letter-spacing:-.03em; color:var(--ink); }
.hero-meta span{ font-size:13px; color:var(--muted); }

/* hero chat mock — light product frame */
.mock{
  position:relative; border-radius:var(--r-xl); overflow:hidden;
  background:var(--paper);
  border:1px solid var(--line-2);
  box-shadow:var(--shadow);
}
.mock-bar{ display:flex; align-items:center; gap:11px; padding:14px 16px; border-bottom:1px solid var(--line); background:var(--panel-2); }
.mock-bar .mk{ width:24px; height:24px; }
.mock-bar .mk path{ stroke:var(--logo-ink); }
.mock-bar .title{ font-weight:700; font-size:14.5px; letter-spacing:-.015em; color:var(--ink); }
.mock-bar .title small{ display:block; font-family:"JetBrains Mono",monospace; font-weight:500; font-size:9.5px; letter-spacing:.12em; color:var(--muted-2); text-transform:uppercase; }
.mock-sel{ margin-left:auto; display:inline-flex; align-items:center; gap:8px; padding:6px 11px; border-radius:999px; background:var(--paper); border:1px solid var(--line-2); font-size:12.5px; font-weight:700; color:var(--ink); font-family:"JetBrains Mono",monospace; }
.mock-sel svg{ opacity:.5; }
.mock-body{ padding:22px 18px 10px; display:flex; flex-direction:column; gap:14px; min-height:236px; }
.msg{ max-width:84%; padding:12px 15px; border-radius:16px; font-size:14.5px; line-height:1.5; }
.msg.user{ align-self:flex-end; background:var(--ink); color:var(--paper); border-bottom-right-radius:6px; }
.msg.bot{ align-self:flex-start; background:var(--panel-3); border:1px solid var(--line); border-bottom-left-radius:6px; color:var(--text); }
.msg.bot b{ color:var(--ink); }
.typing{ display:inline-flex; gap:4px; align-items:center; }
.typing i{ width:6px; height:6px; border-radius:50%; background:var(--muted-2); animation:blink 1.2s infinite; }
.typing i:nth-child(2){ animation-delay:.2s; } .typing i:nth-child(3){ animation-delay:.4s; }
@keyframes blink{ 0%,60%,100%{ opacity:.25; transform:translateY(0); } 30%{ opacity:1; transform:translateY(-2px);} }
.mock-input{ display:flex; align-items:center; gap:10px; margin:8px 14px 16px; padding:11px 12px 11px 16px; border-radius:14px; background:var(--paper); border:1px solid var(--line-2); color:var(--muted-2); font-size:14px; }
.mock-input .send{ margin-left:auto; width:32px; height:32px; border-radius:10px; background:var(--ink); display:flex; align-items:center; justify-content:center; flex:none; }
.mock-input .send svg path{ stroke:var(--paper); }
.mock-foot{ display:flex; align-items:center; gap:8px; flex-wrap:wrap; padding:11px 16px; border-top:1px solid var(--line); background:var(--panel-2); font-family:"JetBrains Mono",monospace; font-size:11px; letter-spacing:.04em; color:var(--muted-2); }
.mock-foot .lock{ color:var(--accent-2); font-weight:600; }
.mock-foot .sep{ opacity:.4; }

/* ============================================================
   callout
   ============================================================ */
.callout{
  display:grid; grid-template-columns:auto 1fr auto; gap:26px; align-items:center;
  padding:30px 34px; border-radius:var(--r-lg);
  background:var(--paper);
  border:1px solid var(--line);
  box-shadow:var(--shadow-sm);
}
.callout .ic{ width:54px; height:54px; border-radius:15px; display:flex; align-items:center; justify-content:center; background:var(--surface); border:1px solid var(--line); flex:none; color:var(--accent); }
.callout h3{ margin:0 0 5px; color:var(--ink); }
.callout p{ margin:0; color:var(--muted); max-width:640px; }
@media (max-width:760px){ .callout{ grid-template-columns:1fr; gap:18px; } .callout .btn{ width:100%; } }

/* ============================================================
   grids
   ============================================================ */
.grid{ display:grid; gap:18px; }
.grid-3{ grid-template-columns:repeat(3,1fr); }
.grid-2{ grid-template-columns:repeat(2,1fr); }
.grid-4{ grid-template-columns:repeat(4,1fr); }
@media (max-width:980px){ .grid-3,.grid-4{ grid-template-columns:repeat(2,1fr); } }
@media (max-width:620px){ .grid-2,.grid-3,.grid-4{ grid-template-columns:1fr; } }

/* audience */
.aud .ic{ width:46px; height:46px; border-radius:13px; background:var(--surface); border:1px solid var(--line); display:flex; align-items:center; justify-content:center; margin-bottom:18px; color:var(--ink); }
.aud h3{ font-size:19px; margin-bottom:8px; color:var(--ink); }
.aud p{ margin:0; color:var(--muted); font-size:15px; line-height:1.5; }

/* scope */
.scope-card{ padding:30px; }
.scope-card .num{ font-family:"JetBrains Mono",monospace; font-size:12px; letter-spacing:.12em; color:var(--accent); text-transform:uppercase; }
.scope-card h3{ margin:10px 0 12px; color:var(--ink); }
.scope-card p{ margin:0 0 18px; color:var(--muted); }
.scope-card .sub{ font-size:13px; color:var(--muted-2); margin:0 0 10px; font-weight:600; }
.ticks{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:10px; }
.ticks li{ display:flex; gap:11px; align-items:flex-start; font-size:15px; color:var(--text); }
.ticks li svg{ flex:none; margin-top:3px; color:var(--accent-2); }
.spec-grid{ display:grid; grid-template-columns:repeat(2,1fr); gap:10px; }

/* tokens */
.token-list{ display:flex; flex-wrap:wrap; gap:8px; }
.token{ font-family:"JetBrains Mono",monospace; font-size:13px; font-weight:500; padding:7px 12px; border-radius:9px; background:var(--surface); border:1px solid var(--line); color:var(--text); }
.token.hot{ border-color:var(--line-2); color:var(--paper); background:var(--ink); }

/* ============================================================
   process steps
   ============================================================ */
.steps{ display:grid; grid-template-columns:repeat(4,1fr); gap:18px; }
@media (max-width:980px){ .steps{ grid-template-columns:repeat(2,1fr);} }
@media (max-width:560px){ .steps{ grid-template-columns:1fr;} }
.step{ padding:26px; position:relative; }
.step .n{ font-family:"JetBrains Mono",monospace; font-size:13px; font-weight:600; color:var(--ink); border:1px solid var(--line-2); width:38px; height:38px; border-radius:12px; display:flex; align-items:center; justify-content:center; background:var(--surface); margin-bottom:18px; }
.step h3{ font-size:18px; margin-bottom:8px; color:var(--ink); }
.step p{ margin:0 0 16px; color:var(--muted); font-size:14.5px; }
.step .term{ display:inline-flex; align-items:center; gap:8px; font-family:"JetBrains Mono",monospace; font-size:12.5px; color:var(--muted); padding-top:14px; border-top:1px solid var(--line); width:100%; }
.step .term svg{ color:var(--accent); }

/* ============================================================
   before / after
   ============================================================ */
.ba{ display:grid; grid-template-columns:1fr 1fr; gap:18px; }
@media (max-width:760px){ .ba{ grid-template-columns:1fr; } }
.ba-col{ padding:30px; }
.ba-col.after{ border-color:var(--line-2); }
.ba-col .tagrow{ display:flex; align-items:center; gap:10px; margin-bottom:20px; }
.ba-col .pill{ font-family:"JetBrains Mono",monospace; font-size:11.5px; letter-spacing:.1em; text-transform:uppercase; padding:5px 11px; border-radius:999px; font-weight:600; }
.ba-col.before .pill{ background:var(--surface); color:var(--muted); border:1px solid var(--line-2); }
.ba-col.after .pill{ background:var(--ink); color:var(--paper); border:1px solid var(--ink); }
.ba-list{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:14px; }
.ba-list li{ display:flex; gap:12px; align-items:flex-start; font-size:15.5px; }
.ba-list li svg{ flex:none; margin-top:3px; }
.ba-col.before li{ color:var(--muted); }
.ba-col.before li svg{ color:var(--muted-2); }
.ba-col.after li{ color:var(--text); }
.ba-col.after li svg{ color:var(--accent-2); }

/* ============================================================
   pricing
   ============================================================ */
.price-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:18px; align-items:stretch; }
@media (max-width:960px){ .price-grid{ grid-template-columns:1fr; max-width:520px; margin:0 auto; } }
.price{ padding:32px 30px; display:flex; flex-direction:column; }
.price.feat{ border-color:var(--ink); box-shadow:0 30px 60px -34px rgba(20,22,30,.4); }
.price .tier{ display:flex; align-items:center; justify-content:space-between; }
.price .tier .name{ font-size:15px; font-weight:700; font-family:"JetBrains Mono",monospace; letter-spacing:.04em; color:var(--muted); }
.price.feat .tier .name{ color:var(--ink); }
.price .badge{ font-size:11px; font-weight:700; letter-spacing:.06em; text-transform:uppercase; padding:5px 10px; border-radius:999px; background:var(--ink); color:var(--paper); }
.price .amt{ font-size:38px; font-weight:800; letter-spacing:-.035em; margin:20px 0 4px; color:var(--ink); }
.price .amt small{ font-size:15px; font-weight:600; color:var(--muted-2); letter-spacing:0; }
.price .who{ color:var(--muted); font-size:14.5px; margin:0 0 22px; padding-bottom:22px; border-bottom:1px solid var(--line); }
.price .feat-list{ list-style:none; margin:0 0 26px; padding:0; display:flex; flex-direction:column; gap:12px; flex:1; }
.price .feat-list li{ display:flex; gap:11px; align-items:flex-start; font-size:14.5px; color:var(--text); }
.price .feat-list li svg{ flex:none; margin-top:3px; color:var(--accent-2); }
.price .feat-list li.inherit{ color:var(--muted); font-weight:600; }
.price .feat-list li.inherit svg{ color:var(--muted-2); }

/* ============================================================
   FAQ
   ============================================================ */
.faq{ max-width:840px; margin:0 auto; display:flex; flex-direction:column; gap:12px; }
.qa{ border:1px solid var(--line); border-radius:var(--r); background:var(--paper); overflow:hidden; transition:border-color .2s, box-shadow .2s; }
.qa.open{ border-color:var(--line-2); box-shadow:var(--shadow-sm); }
.qa button{ width:100%; text-align:left; display:flex; align-items:center; gap:16px; padding:22px 24px; background:none; border:none; color:var(--ink); font-family:inherit; font-size:17px; font-weight:700; letter-spacing:-.02em; cursor:pointer; }
.qa .plus{ margin-left:auto; flex:none; width:24px; height:24px; position:relative; transition:transform .3s var(--ease); }
.qa .plus::before,.qa .plus::after{ content:""; position:absolute; inset:0; margin:auto; background:var(--ink); border-radius:2px; }
.qa .plus::before{ width:13px; height:2px; }
.qa .plus::after{ width:2px; height:13px; transition:transform .3s var(--ease); }
.qa.open .plus::after{ transform:scaleY(0); }
.qa .ans{ max-height:0; overflow:hidden; transition:max-height .35s var(--ease); }
.qa .ans p{ margin:0; padding:0 24px 24px; color:var(--muted); font-size:15.5px; line-height:1.6; max-width:680px; }

/* ============================================================
   final CTA + form
   ============================================================ */
.cta-grid{ display:grid; grid-template-columns:1.05fr .95fr; gap:54px; align-items:start; }
@media (max-width:960px){ .cta-grid{ grid-template-columns:1fr; gap:40px; } }
.cta-grid .h2{ color:var(--ink); }
.cta-points{ list-style:none; margin:28px 0 0; padding:0; display:flex; flex-direction:column; gap:15px; }
.cta-points li{ display:flex; gap:13px; align-items:flex-start; font-size:16px; color:var(--text); }
.cta-points li svg{ flex:none; margin-top:3px; color:var(--accent-2); }
.cta-sign{ margin-top:32px; padding:18px 20px; border-radius:var(--r); border:1px solid var(--line); background:var(--surface); color:var(--muted); font-size:14.5px; }
.cta-sign b{ color:var(--ink); }

.form-card{ padding:32px; border:1px solid var(--line-2); border-radius:var(--r-xl); background:var(--paper); box-shadow:var(--shadow); position:relative; }
.form-card h3{ margin:0 0 6px; font-size:22px; color:var(--ink); }
.form-card .fsub{ margin:0 0 24px; color:var(--muted); font-size:14.5px; }
.field{ margin-bottom:16px; }
.field label{ display:block; font-size:13px; font-weight:600; color:var(--muted); margin-bottom:8px; letter-spacing:.01em; }
.field input{
  width:100%; padding:14px 16px; font-family:inherit; font-size:16px; color:var(--ink);
  background:var(--panel-2); border:1px solid var(--line-2); border-radius:12px;
  transition:border-color .2s, background .2s, box-shadow .2s;
}
.field input::placeholder{ color:var(--muted-2); }
.field input:focus{ outline:none; border-color:var(--accent); background:var(--paper); box-shadow:0 0 0 4px var(--accent-soft); }
.field.invalid input{ border-color:#e0564d; box-shadow:0 0 0 4px rgba(224,86,77,.10); }
.field .err{ display:none; color:#cf4339; font-size:12.5px; margin-top:7px; font-weight:600; }
.field.invalid .err{ display:block; }
.form-card .btn{ margin-top:6px; }
.form-note{ margin:16px 0 0; font-size:12.5px; color:var(--muted-2); line-height:1.5; text-align:center; }
.form-note a{ color:var(--muted); text-decoration:underline; text-underline-offset:2px; }
.form-error:empty{ display:none; }
.form-error{ margin:12px 0 0; color:#cf4339; font-size:13px; font-weight:600; text-align:center; }
.form-card.sending{ opacity:.85; }
.form-card.sending .btn{ cursor:progress; }

/* success */
.form-done{ display:none; flex-direction:column; align-items:center; text-align:center; padding:36px 10px; }
.form-card.done .form-real{ display:none; }
.form-card.done .form-done{ display:flex; }
.form-done .check{ width:72px; height:72px; border-radius:50%; background:var(--surface); border:1px solid var(--line-2); display:flex; align-items:center; justify-content:center; margin-bottom:22px; animation:pop .5s var(--ease); }
.form-done .check svg path{ stroke:var(--accent-2); }
@keyframes pop{ 0%{ transform:scale(.5); opacity:0;} 60%{ transform:scale(1.08);} 100%{ transform:scale(1); opacity:1;} }
.form-done h3{ margin:0 0 10px; color:var(--ink); }
.form-done p{ margin:0; color:var(--muted); max-width:340px; }

/* ============================================================
   footer
   ============================================================ */
.site-footer{ border-top:1px solid var(--line); padding:66px 0 36px; margin-top:0; position:relative; background:var(--surface); }
.foot-grid{ display:grid; grid-template-columns:1.4fr 1fr 1fr; gap:40px; }
@media (max-width:820px){ .foot-grid{ grid-template-columns:1fr; gap:30px; } }
.foot-brand .brand{ margin-bottom:16px; }
.foot-brand p{ color:var(--muted); font-size:14.5px; max-width:360px; margin:0; line-height:1.6; }
.foot-col h4{ font-family:"JetBrains Mono",monospace; font-size:12px; letter-spacing:.12em; text-transform:uppercase; color:var(--muted-2); margin:0 0 16px; font-weight:500; }
.foot-col a, .foot-col p{ display:block; color:var(--muted); font-size:14.5px; margin:0 0 11px; transition:color .2s; }
.foot-col a:hover{ color:var(--ink); }
.req{ font-size:13.5px; color:var(--muted); line-height:1.7; }
.req b{ color:var(--ink); font-weight:600; }
.req a{ color:var(--muted); }
.foot-bottom{ display:flex; align-items:center; justify-content:space-between; gap:16px; margin-top:48px; padding-top:24px; border-top:1px solid var(--line); font-size:13px; color:var(--muted-2); flex-wrap:wrap; }
.foot-bottom a{ color:var(--muted-2); }
.foot-bottom a:hover{ color:var(--ink); }
.totop{ display:inline-flex; align-items:center; gap:7px; }

/* ============================================================
   LEGAL pages
   ============================================================ */
.legal-head{ padding-top:54px; padding-bottom:16px; }
.legal-head .eyebrow{ margin-bottom:18px; }
.legal-head h1{ font-size:clamp(28px,4vw,46px); max-width:900px; color:var(--ink); }
.legal-wrap{ max-width:820px; margin:0 auto; padding-bottom:64px; }
.legal-intro{ font-size:17px; color:var(--muted); line-height:1.7; padding:24px 26px; border:1px solid var(--line); border-radius:var(--r); background:var(--surface); margin:24px 0 40px; }
.legal-intro b{ color:var(--ink); font-weight:700; }
.legal h2{ font-size:21px; margin:42px 0 16px; padding-top:30px; border-top:1px solid var(--line); display:flex; gap:14px; align-items:baseline; letter-spacing:-.025em; color:var(--ink); }
.legal h2 .s{ font-family:"JetBrains Mono",monospace; font-size:14px; color:var(--accent); font-weight:600; }
.legal h3{ font-size:16.5px; margin:26px 0 12px; color:var(--ink); }
.legal p{ color:var(--muted); margin:0 0 14px; line-height:1.7; font-size:15.5px; }
.legal ul{ margin:0 0 16px; padding-left:0; list-style:none; display:flex; flex-direction:column; gap:10px; }
.legal ul li{ position:relative; padding-left:22px; color:var(--muted); font-size:15.5px; line-height:1.65; }
.legal ul li::before{ content:""; position:absolute; left:4px; top:10px; width:6px; height:6px; border-radius:50%; background:var(--accent); }
.legal b, .legal strong{ color:var(--ink); font-weight:700; }
.legal a{ color:var(--accent); text-decoration:underline; text-underline-offset:2px; }
.legal-req{ margin-top:46px; padding:26px; border:1px solid var(--line-2); border-radius:var(--r-lg); background:var(--surface); }
.legal-req h3{ margin:0 0 18px; font-family:"JetBrains Mono",monospace; font-size:13px; letter-spacing:.1em; text-transform:uppercase; color:var(--muted-2); font-weight:500; }
.req-grid{ display:grid; grid-template-columns:repeat(2,1fr); gap:18px 30px; }
@media (max-width:560px){ .req-grid{ grid-template-columns:1fr; } }
.req-grid div span{ display:block; font-size:12.5px; color:var(--muted-2); margin-bottom:4px; }
.req-grid div b{ font-size:15px; color:var(--ink); font-weight:700; }
.legal-back{ display:inline-flex; align-items:center; gap:9px; margin-top:8px; color:var(--muted); font-weight:600; font-size:14.5px; }
.legal-back:hover{ color:var(--ink); }

/* reveal */
.reveal{ opacity:0; transform:translateY(18px); transition:transform .7s var(--ease); }
.reveal.in{ opacity:1; transform:none; }
@media (prefers-reduced-motion:reduce){ .reveal{ opacity:1; transform:none; transition:none; } html{ scroll-behavior:auto; } }

/* decorative grid toggle */
html[data-grid="off"] body::after{ display:none; }

/* ============================================================
   DARK ALTERNATE (Tweaks → «Полночь»)
   ============================================================ */
html[data-theme="midnight"]{
  --paper:#11141d; --bg:#0a0d15; --surface:#0e1119; --surface-2:#11151f;
  --panel:#10141f; --panel-2:#141a27; --panel-3:#1a2233;
  --line:rgba(255,255,255,.08); --line-2:rgba(255,255,255,.14); --line-3:rgba(255,255,255,.22);
  --ink:#f2f5fc; --text:#e7ebf4; --muted:#a6afc2; --muted-2:#727c92;
  --accent-soft:rgba(47,107,255,.16); --accent-line:rgba(47,107,255,.42);
  --accent-ink:#8db4ff;
  --btn-bg:var(--accent); --btn-bg-h:color-mix(in oklab, var(--accent) 86%, #fff); --btn-fg:#071018; --btn-border:var(--accent);
  --logo-ink:#e9eefb;
  --shadow:0 24px 60px -24px rgba(0,0,0,.7);
  --shadow-sm:0 10px 30px -16px rgba(0,0,0,.6);
}
html[data-theme="midnight"] body::before{
  background:
    radial-gradient(900px 520px at 80% -8%, color-mix(in oklab, var(--accent) 22%, transparent), transparent 60%),
    radial-gradient(760px 520px at 6% 4%, color-mix(in oklab, var(--accent-2) 12%, transparent), transparent 55%),
    linear-gradient(180deg,#0b0f18 0%, var(--bg) 38%);
}
html[data-theme="midnight"] body::after{
  background-image:
    linear-gradient(rgba(255,255,255,.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.022) 1px, transparent 1px);
}
html[data-theme="midnight"] .site-header.scrolled{ background:rgba(10,13,21,.72); }
html[data-theme="midnight"] .btn-ghost{ color:var(--text); background:rgba(255,255,255,.03); }
html[data-theme="midnight"] .btn-ghost:hover{ background:rgba(255,255,255,.07); border-color:var(--line-3); }
html[data-theme="midnight"] .card,
html[data-theme="midnight"] .callout,
html[data-theme="midnight"] .qa,
html[data-theme="midnight"] .form-card,
html[data-theme="midnight"] .mock{ background:linear-gradient(180deg, rgba(255,255,255,.035), rgba(255,255,255,.012)); }
html[data-theme="midnight"] .mock-bar,
html[data-theme="midnight"] .mock-foot{ background:rgba(0,0,0,.18); }
html[data-theme="midnight"] .mock-input,
html[data-theme="midnight"] .mock-sel{ background:rgba(255,255,255,.04); }
html[data-theme="midnight"] .hero-badge{ background:rgba(255,255,255,.04); }
html[data-theme="midnight"] .hero-badge .tag,
html[data-theme="midnight"] .price .badge,
html[data-theme="midnight"] .ba-col.after .pill,
html[data-theme="midnight"] .token.hot{ background:var(--accent); color:#071018; border-color:transparent; }
html[data-theme="midnight"] .price.feat{ border-color:var(--accent-line); background:linear-gradient(180deg, rgba(47,107,255,.1), rgba(255,255,255,.012)); box-shadow:var(--glow); }
html[data-theme="midnight"] .msg.user{ background:var(--accent); }
html[data-theme="midnight"] .mock-input .send{ background:var(--accent); }
html[data-theme="midnight"] .mock-input .send svg path{ stroke:#071018; }
html[data-theme="midnight"] .nav-links a:hover,
html[data-theme="midnight"] .btn-ghost:hover{ background:rgba(255,255,255,.06); }