/* ============================================================
   Арина Родионовна — персональный второй мозг
   Landing styles. Built on the Notamedia design system.
   Tone: slightly softer / more human, same palette.
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; }

:root {
  --max-w: 1400px;
  --pad-x: clamp(20px, 4vw, 64px);
  --section-y: clamp(64px, 8vw, 120px);
}

html { scroll-behavior: smooth; }
html, body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--fg-1);
  background: var(--bg-1);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }

.wrap { max-width: var(--max-w); margin: 0 auto; padding: 0 var(--pad-x); }
.wrap-narrow { max-width: 880px; margin: 0 auto; padding: 0 var(--pad-x); }

/* ---------- Shared type helpers ---------- */
.eyebrow {
  font-family: var(--font-display);
  font-size: 12px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.14em;
  color: var(--nota-teal);
  margin: 0 0 18px;
  display: flex; align-items: center; gap: 10px;
}
.eyebrow::before {
  content: ""; width: 26px; height: 2px; background: var(--brand-gradient);
  display: inline-block; border-radius: 2px;
}
.eyebrow--light { color: rgba(255,255,255,.72); }
.eyebrow--center { justify-content: center; }

.h-sec {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(25px, 2.5vw, 36px);
  line-height: 1.12; letter-spacing: -0.018em;
  margin: 0 0 20px;
  text-wrap: balance;
}
.h-sec--light { color: #fff; }
.lead {
  font-size: clamp(17px, 1.5vw, 20px);
  line-height: 1.6; color: var(--fg-2);
  max-width: 760px; margin: 0;
}
.lead--light { color: rgba(255,255,255,.82); }
.gradient-text {
  background: var(--brand-gradient);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.gt-blue { color: var(--nota-blue); }

/* ---------- Buttons ---------- */
.btn {
  font-family: var(--font-display); font-weight: 700; font-size: 14px;
  letter-spacing: 0.02em;
  padding: 14px 26px; border-radius: var(--radius-pill); border: none;
  cursor: pointer; display: inline-flex; align-items: center; gap: 9px;
  text-decoration: none;
  transition: background 140ms ease, color 140ms ease, border-color 140ms ease, transform 140ms ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--nota-blue); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-ghost { background: transparent; color: var(--nota-blue); padding-left: 8px; padding-right: 8px; }
.btn-ghost:hover { color: var(--accent-hover); }
.btn-ondark { background: #fff; color: var(--nota-blue); }
.btn-ondark:hover { background: rgba(255,255,255,.88); }
.btn-outline-light { background: transparent; color: #fff; border: 1px solid rgba(255,255,255,.32); }
.btn-outline-light:hover { border-color: #fff; }

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(1.3) blur(12px);
  border-bottom: 1px solid var(--ink-100);
}
.site-header-inner {
  max-width: var(--max-w); margin: 0 auto;
  padding: 14px var(--pad-x);
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.brand-mark { width: 34px; height: 34px; border-radius: 7px; box-shadow: var(--shadow-xs); }
.brand-name {
  font-family: var(--font-display); font-weight: 800; font-size: 16px;
  color: var(--ink-900); letter-spacing: -0.01em; line-height: 1;
}
.brand-sub {
  font-family: var(--font-display); font-size: 10px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.12em; color: var(--fg-3); margin-top: 3px;
}
.site-nav { display: flex; gap: 26px; }
.site-nav a {
  font-family: var(--font-display); font-size: 13px; font-weight: 700;
  letter-spacing: 0.02em; color: var(--fg-2); border: none; padding: 4px 0;
}
.site-nav a:hover { color: var(--nota-blue); }
.header-grad-strip { height: 3px; background: var(--brand-gradient); }
@media (max-width: 900px) { .site-nav { display: none; } }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative; overflow: hidden;
  background:
    radial-gradient(1200px 600px at 85% -10%, rgba(31,158,191,.16), transparent 60%),
    radial-gradient(900px 500px at 5% 110%, rgba(128,182,74,.12), transparent 55%),
    var(--bg-2);
}
.hero-inner {
  max-width: var(--max-w); margin: 0 auto; padding: clamp(56px,7vw,96px) var(--pad-x) clamp(64px,7vw,104px);
  display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 56px; align-items: center;
}
.hero-kicker {
  font-family: var(--font-display); font-size: 13px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.16em; color: var(--nota-teal);
  margin: 0 0 22px;
}
.hero h1 {
  font-family: var(--font-display); font-weight: 800;
  font-size: clamp(34px, 4vw, 58px); line-height: 1.04; letter-spacing: -0.02em;
  margin: 0 0 26px; color: var(--ink-900); text-wrap: balance;
}
.hero-lead {
  font-size: clamp(17px,1.5vw,20px); line-height: 1.6; color: var(--fg-2);
  max-width: 560px; margin: 0 0 34px;
}
.hero-lead b { color: var(--ink-900); font-weight: 700; }
.hero-ctas { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }
.hero-meta {
  margin-top: 30px; display: flex; gap: 28px; flex-wrap: wrap;
}
.hero-meta .m-num {
  font-family: var(--font-display); font-weight: 800; font-size: 26px; color: var(--nota-blue);
  letter-spacing: -0.02em; line-height: 1;
}
.hero-meta .m-lbl {
  font-size: 12px; color: var(--fg-3); margin-top: 5px; max-width: 130px; line-height: 1.35;
}
@media (max-width: 940px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
}

/* ---------- Chat mock (hero visual) ---------- */
.chat-mock {
  background: #fff; border: 1px solid var(--ink-200); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg); overflow: hidden;
  display: flex; flex-direction: column;
}
.chat-top {
  display: flex; align-items: center; gap: 11px;
  padding: 14px 18px; border-bottom: 1px solid var(--ink-100); background: var(--bg-2);
}
.chat-avatar {
  width: 34px; height: 34px; border-radius: 50%; flex: none;
  background: var(--brand-gradient); display: grid; place-items: center;
  color: #fff; font-family: var(--font-display); font-weight: 800; font-size: 14px;
}
.chat-who { font-family: var(--font-display); font-weight: 700; font-size: 14px; color: var(--ink-900); }
.chat-status { font-size: 11px; color: var(--success); display: flex; align-items: center; gap: 5px; }
.chat-status::before { content:""; width:7px; height:7px; border-radius:50%; background: var(--success); }
.chat-body { padding: 18px; display: flex; flex-direction: column; gap: 12px; background: var(--bg-2); }
.bubble { max-width: 86%; padding: 12px 15px; border-radius: 16px; font-size: 14px; line-height: 1.5; }
.bubble-user {
  align-self: flex-end; background: var(--nota-blue); color: #fff;
  border-bottom-right-radius: 5px;
}
.bubble-ai {
  align-self: flex-start; background: #fff; color: var(--ink-800);
  border: 1px solid var(--ink-100); border-bottom-left-radius: 5px; box-shadow: var(--shadow-xs);
}
.bubble-ai strong { color: var(--ink-900); }
.ai-chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.ai-chip {
  font-family: var(--font-display); font-size: 10.5px; font-weight: 700; letter-spacing: .03em;
  padding: 4px 9px; border-radius: var(--radius-pill);
  background: var(--accent-soft); color: var(--nota-blue);
}
.chat-input {
  display: flex; align-items: center; gap: 10px; padding: 12px 16px;
  border-top: 1px solid var(--ink-100); background: #fff;
}
.chat-input .ci-field {
  flex: 1; font-size: 13px; color: var(--fg-3);
  border: 1px solid var(--ink-200); border-radius: var(--radius-pill); padding: 9px 14px;
}
.chat-input .ci-mic {
  width: 36px; height: 36px; border-radius: 50%; flex: none;
  background: var(--brand-gradient); display: grid; place-items: center; color: #fff;
}

/* ============================================================
   GENERIC SECTION
   ============================================================ */
.section { padding: var(--section-y) 0; }
.section-head { max-width: 840px; margin: 0 0 clamp(40px,5vw,64px); }
.section-head--center { margin-left: auto; margin-right: auto; text-align: center; }

.section--paper { background: var(--bg-2); }
.section--dark { background: var(--nota-blue); color: #fff; }
.section--deep { background: var(--bg-dark-deep); color: #fff; }

/* ============================================================
   KEY IDEA — контекст, а не модель  (before / after)
   ============================================================ */
.idea-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 8px; }
@media (max-width: 820px){ .idea-grid { grid-template-columns: 1fr; } }
.ba-card {
  border-radius: var(--radius-lg); padding: 30px; border: 1px solid var(--ink-200);
}
.ba-before { background: #fff; }
.ba-after { background: var(--nota-blue); border-color: var(--nota-blue); color: #fff; position: relative; overflow:hidden; }
.ba-after::after {
  content:""; position:absolute; inset:auto 0 0 0; height:5px; background: var(--brand-gradient);
}
.ba-tag {
  font-family: var(--font-display); font-size: 11px; font-weight: 800; letter-spacing: .12em;
  text-transform: uppercase; margin-bottom: 16px; display:inline-block;
}
.ba-before .ba-tag { color: var(--fg-3); }
.ba-after .ba-tag { color: rgba(255,255,255,.7); }
.ba-card .ba-quote { font-size: 17px; line-height: 1.55; margin: 0 0 18px; }
.ba-before .ba-quote { color: var(--fg-2); }
.ba-after .ba-quote { color: rgba(255,255,255,.92); }
.ba-foot { font-size: 13px; line-height: 1.5; margin: 0; padding-top: 16px; border-top: 1px solid; }
.ba-before .ba-foot { color: var(--fg-3); border-color: var(--ink-100); }
.ba-after .ba-foot { color: rgba(255,255,255,.7); border-color: rgba(255,255,255,.16); }

.pull {
  font-family: var(--font-display); font-weight: 800;
  font-size: clamp(24px,3vw,40px); line-height: 1.18; letter-spacing: -0.01em;
  text-wrap: balance; margin: clamp(48px,6vw,72px) 0 0;
}

/* ============================================================
   MCP — main idea
   ============================================================ */
.mcp-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
@media (max-width: 940px){ .mcp-grid { grid-template-columns: 1fr; gap: 36px; } }
.mcp-points { list-style: none; padding: 0; margin: 28px 0 0; display: flex; flex-direction: column; gap: 20px; }
.mcp-points li { display: flex; gap: 16px; }
.mcp-num {
  flex: none; width: 34px; height: 34px; border-radius: 50%;
  display: grid; place-items: center;
  font-family: var(--font-display); font-weight: 800; font-size: 14px;
  background: var(--accent-soft); color: var(--nota-blue);
}
.mcp-points li h4 { margin: 4px 0 4px; font-family: var(--font-display); font-size: 17px; color: var(--ink-900); }
.mcp-points li p { margin: 0; font-size: 14.5px; color: var(--fg-2); line-height: 1.5; }

/* socket diagram */
.socket {
  background: var(--bg-dark-deep); border-radius: var(--radius-lg); padding: 34px 30px; color:#fff;
  position: relative; overflow: hidden;
}
.socket-row { display:flex; align-items:center; justify-content:space-between; gap: 14px; }
.socket-node {
  flex: 1; text-align:center; padding: 18px 12px; border-radius: var(--radius-md);
  background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.12);
}
.socket-node .sn-icn { font-size: 22px; margin-bottom: 8px; }
.socket-node .sn-t { font-family: var(--font-display); font-weight: 700; font-size: 13px; letter-spacing:.02em; }
.socket-node .sn-s { font-size: 11px; color: rgba(255,255,255,.6); margin-top: 4px; }
.socket-plug {
  flex: none; width: 64px; align-self: stretch; display:grid; place-items:center;
}
.socket-plug .sp-line {
  font-family: var(--font-display); font-weight:800; font-size: 10px; letter-spacing:.14em;
  color: var(--nota-lime); writing-mode: horizontal-tb; text-align:center;
}
.socket-cable { height: 3px; background: var(--brand-gradient); border-radius: 3px; margin: 22px 0; position: relative; }
.socket-cable::before, .socket-cable::after {
  content:""; position:absolute; top:50%; width:10px; height:10px; border-radius:50%;
  background:#fff; transform: translateY(-50%); box-shadow: 0 0 0 4px rgba(255,255,255,.12);
}
.socket-cable::before { left: -2px; } .socket-cable::after { right:-2px; }
.socket-models { display:flex; gap:8px; flex-wrap:wrap; justify-content:center; margin-top: 4px; }
.socket-model {
  font-family: var(--font-display); font-size: 11px; font-weight:700; letter-spacing:.04em;
  padding: 6px 12px; border-radius: var(--radius-pill);
  background: rgba(255,255,255,.08); border:1px solid rgba(255,255,255,.16); color:#fff;
}
.socket-cap { font-size: 12.5px; color: rgba(255,255,255,.62); margin: 18px 0 0; text-align:center; line-height:1.5; }

/* ============================================================
   LAYERS — 4 кубика
   ============================================================ */
.layers { display: flex; flex-direction: column; gap: 16px; margin-top: 8px; }
.layer {
  display: grid; grid-template-columns: 120px 1fr; gap: 28px; align-items: stretch;
  background: #fff; border: 1px solid var(--ink-200); border-radius: var(--radius-lg);
  padding: 26px 30px; box-shadow: var(--shadow-xs);
  transition: box-shadow 180ms ease, transform 180ms ease;
}
.layer:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.layer-badge {
  display: flex; flex-direction: column; justify-content: center;
  border-right: 1px solid var(--ink-100); padding-right: 24px;
}
.layer-badge .lb-k { font-family: var(--font-display); font-weight:800; font-size: 11px; letter-spacing:.12em; color: var(--fg-3); text-transform: uppercase; }
.layer-badge .lb-n {
  font-family: var(--font-display); font-weight: 800; font-size: 44px; line-height: 1;
  background: var(--brand-gradient); -webkit-background-clip:text; background-clip:text; color: transparent;
  margin-top: 4px;
}
.layer-body h3 { margin: 0 0 8px; font-family: var(--font-display); font-size: 21px; color: var(--ink-900); }
.layer-body p { margin: 0; color: var(--fg-2); font-size: 15px; line-height: 1.55; }
.layer-body .lb-tag { display:inline-block; margin-top:12px; font-family:var(--font-display); font-weight:700; font-size:12px; color: var(--nota-teal); letter-spacing:.04em; }
@media (max-width: 700px){
  .layer { grid-template-columns: 1fr; gap: 14px; }
  .layer-badge { flex-direction: row; align-items: baseline; gap: 14px; border-right: none; border-bottom: 1px solid var(--ink-100); padding: 0 0 14px; }
  .layer-badge .lb-n { font-size: 34px; }
}
.flow {
  margin-top: 32px; padding: 20px 26px; border-radius: var(--radius-md);
  background: var(--accent-soft); display:flex; align-items:center; gap:14px; flex-wrap:wrap;
  font-family: var(--font-display); font-weight:700; font-size: 14px; color: var(--nota-blue);
}
.flow .fl-step { white-space: nowrap; }
.flow .fl-arr { color: var(--nota-teal); }

/* ============================================================
   STAT BAND
   ============================================================ */
.stats-inner {
  display: grid; grid-template-columns: repeat(6, 1fr); gap: 28px;
}
@media (max-width: 900px){ .stats-inner { grid-template-columns: repeat(3,1fr); gap: 32px 20px; } }
@media (max-width: 520px){ .stats-inner { grid-template-columns: repeat(2,1fr); } }
.stat .s-num {
  font-family: var(--font-display); font-weight: 800; font-size: clamp(38px,4vw,54px);
  line-height: .95; letter-spacing: -0.02em; color: #fff;
}
.stat .s-num .s-suf { font-size: .5em; opacity: .85; margin-left: 2px; }
.stat .s-lbl {
  font-family: var(--font-display); font-size: 11px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.05em; color: rgba(255,255,255,.72);
  margin-top: 12px; line-height: 1.4;
}

/* ============================================================
   SPHERES grid
   ============================================================ */
.spheres { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px;
  background: var(--ink-100); border: 1px solid var(--ink-100);
  border-radius: var(--radius-lg); overflow: hidden; }
@media (max-width: 920px){ .spheres { grid-template-columns: repeat(2,1fr); } }
@media (max-width: 600px){ .spheres { grid-template-columns: 1fr; } }
.sphere {
  background: #fff; padding: 26px 26px 28px;
  transition: background 160ms ease;
}
.sphere:hover { background: var(--bg-2); }
.sphere-top { display:flex; align-items:center; gap: 12px; margin-bottom: 12px; }
.sphere-ic {
  width: 38px; height: 38px; border-radius: 9px; flex:none; display:grid; place-items:center;
  color:#fff;
}
.sphere h4 { margin: 0; font-family: var(--font-display); font-weight: 800; font-size: 15px; letter-spacing:.01em; color: var(--ink-900); text-transform: uppercase; }
.sphere p { margin: 0 0 12px; font-size: 14px; color: var(--fg-2); line-height: 1.5; }
.sphere .s-ex {
  font-size: 13px; color: var(--nota-teal); font-style: italic; line-height: 1.45;
  padding-left: 12px; border-left: 2px solid var(--ink-100);
}

/* ============================================================
   INTERFACE — chat / voice / mini-app
   ============================================================ */
.iface-tabs { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; margin-bottom: 44px; }
@media (max-width: 800px){ .iface-tabs { grid-template-columns: 1fr; } }
.iface-tab {
  background: #fff; border: 1px solid var(--ink-200); border-radius: var(--radius-lg); padding: 26px;
  box-shadow: var(--shadow-xs);
}
.iface-tab .it-ic { width: 44px; height:44px; border-radius: 11px; display:grid; place-items:center; color:#fff; margin-bottom: 16px; background: var(--nota-blue); }
.iface-tab h4 { margin: 0 0 8px; font-family: var(--font-display); font-size: 18px; color: var(--ink-900); }
.iface-tab p { margin: 0; font-size: 14.5px; color: var(--fg-2); line-height: 1.55; }

/* voice mock */
.voice-mock {
  background: var(--bg-dark-deep); border-radius: var(--radius-lg); padding: 28px 30px; color:#fff;
}
.voice-head { display:flex; align-items:center; gap:12px; margin-bottom: 18px; }
.voice-mic { width: 46px; height:46px; border-radius:50%; background: var(--brand-gradient); display:grid; place-items:center; flex:none; }
.voice-wave { display:flex; align-items:center; gap:4px; height: 40px; margin-bottom: 16px; }
.voice-wave span { flex:1; background: linear-gradient(180deg, var(--grad-cyan), var(--grad-lime)); border-radius: 3px; opacity:.85; }
.voice-transcript { font-size: 14px; color: rgba(255,255,255,.85); font-style: italic; margin: 0 0 18px; line-height:1.5; }
.voice-intents { display:flex; flex-direction:column; gap:10px; }
.voice-intent {
  display:flex; align-items:center; gap:12px; padding: 12px 14px; border-radius: var(--radius-md);
  background: rgba(255,255,255,.05); border:1px solid rgba(255,255,255,.12);
}
.voice-intent .vi-check { width:22px; height:22px; border-radius:50%; background: var(--success); color:#fff; display:grid; place-items:center; flex:none; font-size:13px; font-weight:800; }
.voice-intent .vi-t { font-size: 13.5px; color:#fff; }
.voice-intent .vi-t b { font-family:var(--font-display); }

/* mini-app phone mock */
.miniapp-wrap { display:grid; grid-template-columns: 300px 1fr; gap: 48px; align-items:center; }
@media (max-width: 860px){ .miniapp-wrap { grid-template-columns: 1fr; gap: 36px; justify-items:center; } }
.phone {
  width: 300px; background: #0b1f33; border-radius: 38px; padding: 12px; box-shadow: var(--shadow-lg);
  border: 1px solid rgba(255,255,255,.08);
}
.phone-screen { background: var(--bg-2); border-radius: 28px; overflow: hidden; }
.phone-notch { height: 26px; display:flex; align-items:center; justify-content:center; }
.phone-notch::after { content:""; width: 110px; height: 6px; border-radius: 3px; background: rgba(255,255,255,.18); }
.pa-header { background: var(--nota-blue); color:#fff; padding: 16px 18px 18px; }
.pa-date { font-size: 11px; opacity:.75; letter-spacing:.05em; text-transform:uppercase; font-family:var(--font-display); font-weight:700; }
.pa-title { font-family: var(--font-display); font-weight:800; font-size: 22px; margin-top:3px; }
.pa-quality { display:flex; align-items:center; gap:8px; margin-top:12px; }
.pa-quality .pq-dot { width:10px; height:10px; border-radius:50%; background: var(--grad-lime); }
.pa-quality .pq-t { font-size:12px; opacity:.9; }
.pa-body { padding: 14px; display:flex; flex-direction:column; gap:10px; }
.pa-card { background:#fff; border:1px solid var(--ink-100); border-radius: 14px; padding: 13px 14px; }
.pa-card .pc-k { font-family:var(--font-display); font-size:10px; font-weight:700; letter-spacing:.1em; text-transform:uppercase; color: var(--fg-3); }
.pa-card .pc-row { display:flex; align-items:baseline; justify-content:space-between; margin-top:6px; }
.pa-card .pc-v { font-family:var(--font-display); font-weight:800; font-size:18px; color: var(--ink-900); }
.pa-card .pc-s { font-size:11px; color: var(--fg-3); }
.pa-bar { height:6px; border-radius:3px; background: var(--ink-100); margin-top:10px; overflow:hidden; }
.pa-bar i { display:block; height:100%; background: var(--brand-gradient); border-radius:3px; }
.pa-tabs { display:flex; justify-content:space-around; padding: 10px 6px 12px; background:#fff; border-top:1px solid var(--ink-100); }
.pa-tabs .pt { display:flex; flex-direction:column; align-items:center; gap:4px; font-size:9px; color: var(--fg-3); font-family:var(--font-display); font-weight:700; }
.pa-tabs .pt.active { color: var(--nota-blue); }
.pa-tabs .pt .pt-ic { width:20px; height:20px; }

.miniapp-tabs-list { display:grid; grid-template-columns: repeat(2,1fr); gap: 12px; }
@media (max-width: 520px){ .miniapp-tabs-list { grid-template-columns: 1fr; } }
.mt-item { display:flex; gap:12px; align-items:flex-start; padding: 14px 16px; background:#fff; border:1px solid var(--ink-200); border-radius: var(--radius-md); }
.mt-item .mt-ic { width: 30px; height:30px; border-radius:8px; flex:none; display:grid; place-items:center; color:#fff; background: var(--nota-teal); }
.mt-item h5 { margin: 2px 0 3px; font-family:var(--font-display); font-size: 14px; color: var(--ink-900); }
.mt-item p { margin: 0; font-size: 12.5px; color: var(--fg-2); line-height: 1.45; }

/* ============================================================
   ANATOMY — request steps
   ============================================================ */
.anat-grid { display:grid; grid-template-columns: 1fr 1fr; gap: 28px; }
@media (max-width: 860px){ .anat-grid { grid-template-columns: 1fr; } }
.anat-col h3 {
  font-family: var(--font-display); font-size: 20px; margin: 0 0 6px; color:#fff;
}
.anat-col .ac-q { font-size: 14px; color: rgba(255,255,255,.7); font-style: italic; margin: 0 0 22px; }
.anat-steps { list-style:none; margin:0; padding:0; counter-reset: a; }
.anat-steps li { position: relative; padding: 0 0 22px 46px; }
.anat-steps li:last-child { padding-bottom: 0; }
.anat-steps li::before {
  counter-increment: a; content: counter(a);
  position: absolute; left: 0; top: 0; width: 30px; height: 30px; border-radius:50%;
  background: rgba(255,255,255,.08); border:1px solid rgba(255,255,255,.2);
  display:grid; place-items:center; font-family: var(--font-display); font-weight:800; font-size:13px; color:#fff;
}
.anat-steps li::after {
  content:""; position:absolute; left:14px; top:34px; bottom:8px; width:1px; background: rgba(255,255,255,.14);
}
.anat-steps li:last-child::after { display:none; }
.anat-steps li h5 { margin:5px 0 4px; font-family:var(--font-display); font-size: 14.5px; color:#fff; }
.anat-steps li p { margin:0; font-size: 13.5px; color: rgba(255,255,255,.66); line-height:1.5; }
.anat-tag {
  display:inline-block; font-family:var(--font-display); font-weight:800; font-size:10px; letter-spacing:.12em;
  text-transform:uppercase; padding: 5px 11px; border-radius: var(--radius-pill); margin-bottom: 14px;
}
.anat-tag.light { background: rgba(255,255,255,.1); color: var(--nota-lime); }
.anat-tag.heavy { background: rgba(255,255,255,.1); color: var(--grad-cyan); }

/* ============================================================
   SCENARIOS gallery
   ============================================================ */
.scen-grid { columns: 3; column-gap: 18px; }
@media (max-width: 920px){ .scen-grid { columns: 2; } }
@media (max-width: 600px){ .scen-grid { columns: 1; } }
.scen {
  break-inside: avoid; margin: 0 0 18px;
  background: #fff; border:1px solid var(--ink-200); border-radius: var(--radius-md); padding: 20px 22px;
  box-shadow: var(--shadow-xs);
}
.scen .sc-tag {
  font-family:var(--font-display); font-size:10.5px; font-weight:800; letter-spacing:.1em; text-transform:uppercase;
  color: var(--nota-teal); margin-bottom: 12px;
}
.scen .sc-q { font-size: 15px; line-height: 1.5; color: var(--ink-900); margin: 0 0 12px; font-weight:500; }
.scen .sc-q::before { content:"«"; } .scen .sc-q::after { content:"»"; }
.scen .sc-a { font-size: 13.5px; line-height: 1.5; color: var(--fg-2); margin: 0; padding-top: 12px; border-top: 1px dashed var(--ink-200); display:flex; gap:8px; }
.scen .sc-a::before { content:"→"; color: var(--nota-lime); font-weight:800; flex:none; }

/* ============================================================
   INFRA / cost
   ============================================================ */
.infra-grid { display:grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: start; }
@media (max-width: 900px){ .infra-grid { grid-template-columns: 1fr; gap: 36px; } }
.stack-list { display:grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 520px){ .stack-list { grid-template-columns: 1fr; } }
.stack-item { background:#fff; border:1px solid var(--ink-200); border-radius: var(--radius-md); padding: 16px 18px; }
.stack-item h5 { margin: 0 0 4px; font-family:var(--font-display); font-size: 14px; color: var(--ink-900); }
.stack-item p { margin: 0; font-size: 12.5px; color: var(--fg-2); line-height: 1.45; }
.cost-card {
  background: var(--nota-blue); color:#fff; border-radius: var(--radius-lg); padding: 32px; position:relative; overflow:hidden;
}
.cost-card::after { content:""; position:absolute; top:0; left:0; right:0; height:5px; background: var(--brand-gradient); }
.cost-row { display:flex; justify-content:space-between; align-items:baseline; padding: 18px 0; border-bottom: 1px solid rgba(255,255,255,.14); }
.cost-row:last-of-type { border-bottom: none; }
.cost-row .cr-l { }
.cost-row .cr-l b { font-family:var(--font-display); font-size:15px; display:block; }
.cost-row .cr-l span { font-size: 12.5px; color: rgba(255,255,255,.65); }
.cost-row .cr-v { font-family:var(--font-display); font-weight:800; font-size: 24px; white-space:nowrap; }
.cost-note { font-size: 12.5px; color: rgba(255,255,255,.7); margin: 18px 0 0; line-height:1.5; }

/* ============================================================
   PRIVACY / boundaries
   ============================================================ */
.cols-2 { display:grid; grid-template-columns: 1fr 1fr; gap: 48px; }
@media (max-width: 820px){ .cols-2 { grid-template-columns: 1fr; gap: 36px; } }
.check-list { list-style:none; margin: 0; padding: 0; display:flex; flex-direction:column; gap: 14px; }
.check-list li { display:flex; gap: 13px; font-size: 15px; line-height:1.5; color: var(--fg-1); }
.check-list li .ck { flex:none; width:24px; height:24px; border-radius:50%; background: var(--accent-soft); color: var(--nota-blue); display:grid; place-items:center; font-weight:800; font-size:13px; margin-top:1px; }
.cross-list li .ck { background: #fbeae8; color: var(--danger); }
.col-h { font-family:var(--font-display); font-weight:800; font-size: 19px; margin: 0 0 20px; color: var(--ink-900); }

/* ============================================================
   BUILD steps
   ============================================================ */
.build-steps { display:flex; flex-direction:column; gap: 16px; counter-reset: b; }
.build-step {
  display:grid; grid-template-columns: 64px 1fr; gap: 24px; align-items:center;
  background:#fff; border:1px solid var(--ink-200); border-radius: var(--radius-lg); padding: 22px 28px;
}
.build-step .bs-n {
  width: 56px; height:56px; border-radius: 50%; display:grid; place-items:center;
  font-family:var(--font-display); font-weight:800; font-size: 22px; color:#fff;
  background: var(--nota-blue);
}
.build-step:nth-child(1) .bs-n { background: var(--grad-blue); }
.build-step:nth-child(2) .bs-n { background: var(--grad-teal); }
.build-step:nth-child(3) .bs-n { background: var(--grad-emerald); }
.build-step:nth-child(4) .bs-n { background: var(--grad-kelly); }
.build-step:nth-child(5) .bs-n { background: var(--grad-lime); }
.build-step h4 { margin: 0 0 5px; font-family:var(--font-display); font-size: 18px; color: var(--ink-900); }
.build-step p { margin: 0; font-size: 14px; color: var(--fg-2); line-height:1.5; }
@media (max-width: 600px){ .build-step { grid-template-columns: 48px 1fr; gap:16px; padding: 18px 20px; } .build-step .bs-n { width:44px; height:44px; font-size:18px; } }

.principle {
  margin-top: 36px; background: var(--accent-soft); border-radius: var(--radius-lg); padding: 30px 34px;
  border: 1px solid #d4e6f3;
}
.principle .pr-k { font-family:var(--font-display); font-weight:800; font-size:12px; letter-spacing:.12em; text-transform:uppercase; color: var(--nota-teal); margin-bottom: 10px; }
.principle p { margin: 0; font-size: 17px; line-height:1.55; color: var(--ink-800); }
.principle p b { color: var(--nota-blue); }

/* ============================================================
   CLOSING CTA
   ============================================================ */
.closing { text-align:center; }
.closing h2 {
  font-family: var(--font-display); font-weight:800; color:#fff;
  font-size: clamp(30px,3.6vw,46px); line-height: 1.06; letter-spacing: -0.02em; margin: 0 0 22px; text-wrap: balance;
}
.closing .cl-lead { color: rgba(255,255,255,.8); font-size: clamp(17px,1.6vw,20px); max-width: 620px; margin: 0 auto 34px; line-height:1.6; }
.closing-grad { height: 6px; width: 140px; margin: 0 auto 40px; border-radius: 3px; background: var(--brand-gradient); }

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer { background: var(--bg-dark-deep); color: rgba(255,255,255,.7); }
.site-footer-inner { max-width: var(--max-w); margin:0 auto; padding: 44px var(--pad-x); display:flex; justify-content:space-between; align-items:center; gap: 24px; flex-wrap: wrap; }
.site-footer .ft-brand { display:flex; align-items:center; gap: 12px; }
.site-footer .ft-brand img { width: 30px; height:30px; border-radius:6px; }
.site-footer .ft-brand b { font-family:var(--font-display); color:#fff; font-size: 15px; }
.site-footer .ft-note { font-size: 12.5px; max-width: 460px; line-height:1.5; }

/* ============================================================
   v2 — DEEPER SECTIONS
   ============================================================ */

/* ---- sub-section header inside a section ---- */
.subhead { margin: clamp(48px,5vw,72px) 0 24px; }
.subhead .eyebrow { margin-bottom: 12px; }
.subhead h3 { font-family: var(--font-display); font-weight: 800; font-size: clamp(22px,2.4vw,32px); letter-spacing: -0.015em; margin: 0 0 10px; color: var(--ink-900); }
.subhead--light h3 { color: #fff; }
.subhead p { margin: 0; color: var(--fg-2); max-width: 720px; font-size: 16px; line-height: 1.6; }
.subhead--light p { color: rgba(255,255,255,.78); }

/* prose lead paragraphs */
.prose { max-width: 760px; }
.prose p { font-size: 16.5px; line-height: 1.65; color: var(--fg-2); margin: 0 0 16px; }
.prose p b { color: var(--ink-900); }
.prose--light p { color: rgba(255,255,255,.8); }
.prose--light p b { color: #fff; }

/* generic query chips list */
.queries { display: flex; flex-direction: column; gap: 10px; margin: 8px 0 0; }
.query {
  display: flex; gap: 12px; align-items: flex-start;
  background: #fff; border: 1px solid var(--ink-200); border-radius: var(--radius-md);
  padding: 14px 18px; font-size: 15px; line-height: 1.5; color: var(--ink-800);
}
.query::before { content: "\201C"; font-family: var(--font-display); font-weight: 800; font-size: 26px; line-height: .8; color: var(--nota-teal); flex: none; }

/* ---- MCP: how agent uses context (4 numbered steps) ---- */
.usectx { display: grid; grid-template-columns: repeat(4,1fr); gap: 16px; margin-top: 8px; }
@media (max-width: 860px){ .usectx { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px){ .usectx { grid-template-columns: 1fr; } }
.usectx-step { background:#fff; border:1px solid var(--ink-200); border-radius: var(--radius-md); padding: 22px; position: relative; }
.usectx-step .n { font-family: var(--font-display); font-weight:800; font-size: 13px; color: var(--nota-teal); letter-spacing:.1em; margin-bottom: 12px; }
.usectx-step h4 { margin: 0 0 6px; font-family: var(--font-display); font-size: 16px; color: var(--ink-900); }
.usectx-step p { margin: 0; font-size: 13.5px; color: var(--fg-2); line-height: 1.5; }
.usectx-arrow { display:flex; align-items:center; justify-content:center; color: var(--ink-300); }

/* ---- richer sphere card with full bullet list ---- */
.sphere-list { list-style: none; margin: 0 0 12px; padding: 0; display:flex; flex-direction: column; gap: 7px; }
.sphere-list li { position: relative; padding-left: 16px; font-size: 13.5px; color: var(--fg-2); line-height: 1.45; }
.sphere-list li::before { content:"•"; position:absolute; left:0; color: var(--nota-teal); font-weight: 800; }
.sphere-list li b { color: var(--ink-900); font-weight: 600; }
.sphere--wide { grid-column: 1 / -1; }
.sphere--wide .sphere-cols { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px 32px; }
@media (max-width: 820px){ .sphere--wide .sphere-cols { grid-template-columns: 1fr; } }

/* ---- conversation streams bar chart ---- */
.streams { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 40px; margin-top: 8px; }
@media (max-width: 760px){ .streams { grid-template-columns: 1fr; } }
.stream-row { display: grid; grid-template-columns: 168px 1fr 52px; align-items: center; gap: 12px; padding: 5px 0; }
.stream-row .sr-name { font-size: 13.5px; color: var(--ink-800); text-align: right; }
.stream-row .sr-name span { color: var(--fg-3); font-size: 12px; }
.stream-track { background: var(--ink-100); border-radius: var(--radius-pill); height: 12px; overflow: hidden; }
.stream-track i { display:block; height:100%; border-radius: var(--radius-pill); background: var(--brand-gradient); }
.stream-row .sr-val { font-family: var(--font-display); font-weight: 800; font-size: 14px; color: var(--nota-blue); }
.streams-cap { margin-top: 20px; font-size: 13.5px; color: var(--fg-3); }
@media (max-width: 480px){ .stream-row { grid-template-columns: 120px 1fr 40px; } .stream-row .sr-name span { display:none; } }

/* ---- daily rhythm timeline ---- */
.rhythm { position: relative; margin-top: 8px; padding-left: 8px; }
.rhythm-item { display: grid; grid-template-columns: 92px 1fr; gap: 22px; padding: 0 0 22px; position: relative; }
.rhythm-item:last-child { padding-bottom: 0; }
.rhythm-item::before { content:""; position:absolute; left: 99px; top: 22px; bottom: -2px; width: 2px; background: rgba(255,255,255,.16); }
.rhythm-item:last-child::before { display:none; }
.rhythm-time { font-family: var(--font-mono); font-size: 15px; color: var(--nota-lime); text-align: right; padding-top: 1px; }
.rhythm-body { position: relative; padding-left: 26px; }
.rhythm-body::before { content:""; position:absolute; left: -1px; top: 4px; width: 12px; height: 12px; border-radius: 50%; background: var(--bg-dark-deep); border: 2px solid var(--nota-lime); }
.rhythm-body h5 { margin: 0 0 3px; font-family: var(--font-display); font-size: 15px; color: #fff; }
.rhythm-body p { margin: 0; font-size: 13.5px; color: rgba(255,255,255,.66); line-height: 1.5; }

/* ---- model table (Opus / Sonnet / Haiku) ---- */
.models { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; margin-top: 28px; }
@media (max-width: 760px){ .models { grid-template-columns: 1fr; } }
.model-card { background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.14); border-radius: var(--radius-md); padding: 22px; }
.model-card .mc-tier { display:flex; align-items:center; gap:8px; font-family: var(--font-display); font-weight: 800; font-size: 12px; letter-spacing:.08em; text-transform: uppercase; margin-bottom: 12px; }
.model-card .mc-dot { width: 10px; height:10px; border-radius:50%; }
.model-card h4 { margin: 0 0 10px; font-family: var(--font-display); font-size: 19px; color: #fff; }
.model-card p { margin: 0; font-size: 13.5px; color: rgba(255,255,255,.7); line-height: 1.5; }

/* ---- pipelines list ---- */
.pipes { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 8px; }
@media (max-width: 760px){ .pipes { grid-template-columns: 1fr; } }
.pipe { background:#fff; border:1px solid var(--ink-200); border-radius: var(--radius-md); padding: 18px 20px; }
.pipe h5 { margin: 0 0 10px; font-family: var(--font-display); font-size: 14px; color: var(--ink-900); }
.pipe .pipe-flow { display:flex; flex-wrap:wrap; align-items:center; gap: 7px; }
.pipe .pf { font-size: 12.5px; color: var(--fg-2); background: var(--bg-2); border:1px solid var(--ink-100); border-radius: var(--radius-sm); padding: 4px 9px; }
.pipe .pf-arr { color: var(--nota-teal); font-weight: 800; }

/* ---- inventory of ручки ---- */
.inventory { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; }
@media (max-width: 900px){ .inventory { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px){ .inventory { grid-template-columns: 1fr; } }
.inv-group { background:#fff; border:1px solid var(--ink-200); border-radius: var(--radius-lg); padding: 20px 22px; }
.inv-group h4 { display:flex; align-items:center; gap:10px; margin: 0 0 12px; font-family: var(--font-display); font-size: 15px; color: var(--ink-900); }
.inv-group h4 .ig-ic { width:30px; height:30px; border-radius:8px; flex:none; display:grid; place-items:center; color:#fff; }
.inv-list { list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:6px; }
.inv-list li { font-size: 13px; color: var(--fg-2); line-height: 1.4; padding-left: 14px; position: relative; }
.inv-list li::before { content:""; position:absolute; left:0; top:8px; width:5px; height:5px; border-radius:50%; background: var(--nota-lime); }

/* ---- data model relations ---- */
.dm-grid { display:grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items:center; }
@media (max-width: 900px){ .dm-grid { grid-template-columns: 1fr; gap: 32px; } }
.dm-diagram { background: var(--bg-dark-deep); border-radius: var(--radius-lg); padding: 30px; color:#fff; }
.dm-node { background: rgba(255,255,255,.06); border:1px solid rgba(255,255,255,.14); border-radius: var(--radius-md); padding: 12px 16px; font-family: var(--font-display); font-weight:700; font-size: 14px; display:flex; align-items:center; justify-content:space-between; }
.dm-node span { font-size: 11px; font-weight: 600; color: rgba(255,255,255,.55); }
.dm-rel { display:flex; align-items:center; gap: 10px; padding: 7px 0 7px 18px; color: rgba(255,255,255,.6); font-size: 12px; }
.dm-rel::before { content:""; width: 2px; height: 26px; background: var(--brand-gradient); border-radius: 2px; }

/* ---- vibe-coding cards ---- */
.vibe { display:grid; grid-template-columns: repeat(3,1fr); gap: 16px; }
@media (max-width: 860px){ .vibe { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px){ .vibe { grid-template-columns: 1fr; } }
.vibe-card { background:#fff; border:1px solid var(--ink-200); border-radius: var(--radius-lg); padding: 24px; }
.vibe-card .vc-ic { width:42px; height:42px; border-radius:11px; display:grid; place-items:center; color:#fff; margin-bottom: 16px; background: var(--nota-teal); }
.vibe-card h4 { margin: 0 0 8px; font-family: var(--font-display); font-size: 17px; color: var(--ink-900); }
.vibe-card p { margin: 0; font-size: 14px; color: var(--fg-2); line-height: 1.55; }

/* ---- lessons learned grid ---- */
.lessons { display:grid; grid-template-columns: repeat(2,1fr); gap: 14px; }
@media (max-width: 760px){ .lessons { grid-template-columns: 1fr; } }
.lesson { display:flex; gap: 14px; background:#fff; border:1px solid var(--ink-200); border-radius: var(--radius-md); padding: 18px 20px; }
.lesson .ls-ic { flex:none; width: 34px; height:34px; border-radius:9px; background: var(--accent-soft); color: var(--nota-blue); display:grid; place-items:center; }
.lesson h5 { margin: 0 0 4px; font-family: var(--font-display); font-size: 14.5px; color: var(--ink-900); }
.lesson p { margin: 0; font-size: 13px; color: var(--fg-2); line-height: 1.5; }

/* ---- "what you need" start accounts ---- */
.needs { display:grid; grid-template-columns: repeat(5,1fr); gap: 14px; margin-top: 8px; }
@media (max-width: 860px){ .needs { grid-template-columns: repeat(2,1fr); } }
@media (max-width: 460px){ .needs { grid-template-columns: 1fr; } }
.need { background:#fff; border:1px solid var(--ink-200); border-radius: var(--radius-md); padding: 18px; text-align:center; }
.need .nd-ic { width:40px; height:40px; border-radius:10px; margin: 0 auto 12px; display:grid; place-items:center; color:#fff; background: var(--nota-blue); }
.need h5 { margin:0 0 4px; font-family:var(--font-display); font-size: 14px; color: var(--ink-900); }
.need p { margin:0; font-size: 12px; color: var(--fg-3); line-height: 1.4; }

/* ---- detailed first-cube steps ---- */
.cube-steps { counter-reset: cs; list-style:none; margin: 8px 0 0; padding: 0; }
.cube-steps li { display:grid; grid-template-columns: 40px 1fr; gap: 18px; padding: 0 0 18px; }
.cube-steps li::before { counter-increment: cs; content: counter(cs); width: 32px; height:32px; border-radius:50%; background: var(--brand-gradient); color:#fff; font-family:var(--font-display); font-weight:800; font-size:14px; display:grid; place-items:center; }
.cube-steps li p { margin: 4px 0 0; font-size: 15px; color: var(--fg-1); line-height: 1.5; }

/* ---- traps ---- */
.traps { display:grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 8px; }
@media (max-width: 700px){ .traps { grid-template-columns: 1fr; } }
.trap { display:flex; gap: 12px; align-items:flex-start; font-size: 14.5px; color: var(--fg-1); line-height:1.5; background: #fbeae8; border:1px solid #f3d3cf; border-radius: var(--radius-md); padding: 14px 16px; }
.trap .tr-ic { flex:none; color: var(--danger); margin-top:1px; }
.trap b { color: var(--ink-900); }

/* ---- glossary ---- */
.glossary { columns: 2; column-gap: 40px; }
@media (max-width: 760px){ .glossary { columns: 1; } }
.gl { break-inside: avoid; padding: 0 0 16px; }
.gl dt { font-family: var(--font-display); font-weight: 800; font-size: 14px; color: var(--nota-blue); margin-bottom: 4px; }
.gl dd { margin: 0; font-size: 13.5px; color: var(--fg-2); line-height: 1.5; }

/* ---- FAQ accordion ---- */
.faq { max-width: 860px; }
.faq details { border-bottom: 1px solid var(--ink-200); padding: 4px 0; }
.faq summary { cursor: pointer; list-style: none; padding: 18px 40px 18px 0; position: relative; font-family: var(--font-display); font-weight: 700; font-size: 17px; color: var(--ink-900); }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 6px; top: 50%; transform: translateY(-50%); font-size: 24px; font-weight: 400; color: var(--nota-teal); transition: transform 180ms ease; }
.faq details[open] summary::after { content: "\2212"; }
.faq details p { margin: 0 0 18px; font-size: 15px; color: var(--fg-2); line-height: 1.6; max-width: 720px; }

/* in-page section nav under hero */
.toc { display:flex; flex-wrap:wrap; gap: 8px; margin-top: 30px; }
.toc a { font-family: var(--font-display); font-weight:700; font-size: 12px; letter-spacing:.02em; color: var(--fg-2); background:#fff; border:1px solid var(--ink-200); border-radius: var(--radius-pill); padding: 7px 14px; border-bottom: 1px solid var(--ink-200); }
.toc a:hover { color: var(--nota-blue); border-color: var(--nota-blue); }

/* ---------- entrance ----------
   Base state is ALWAYS visible. A keyframe animation (not a transition) provides a
   gentle entrance only when armed; animation-fill-mode keeps the END (visible) state
   even if the animation is interrupted/throttled, and reduced-motion / no-JS show
   content immediately. Visibility never depends on a transition completing. */
@media (prefers-reduced-motion: no-preference) {
  @keyframes reveal-in { from { transform: translateY(16px); } to { transform: none; } }
  body.anim-ready .reveal.in { animation: reveal-in .55s ease both; }
}