/* ============================================================
   Nori · лендинг
   ============================================================ */

body { background: var(--bg); }

/* Фон: живые градиентные пятна + сетка ------------------------ */
.aurora { position: fixed; inset: 0; z-index: 0; overflow: hidden; pointer-events: none; }
.aurora .blob {
  position: absolute; border-radius: 50%;
  filter: blur(90px); opacity: .5;
  will-change: transform;
}
.b1 { width: 46vw; height: 46vw; left: -8vw; top: -12vw; background: radial-gradient(circle, #4285f4, transparent 68%); animation: drift1 26s var(--ease) infinite alternate; }
.b2 { width: 42vw; height: 42vw; right: -10vw; top: 4vw; background: radial-gradient(circle, #9b72cb, transparent 68%); animation: drift2 30s var(--ease) infinite alternate; }
.b3 { width: 38vw; height: 38vw; left: 28vw; top: 34vw; background: radial-gradient(circle, #d96570, transparent 70%); animation: drift3 34s var(--ease) infinite alternate; }
html[data-theme='dark'] .aurora .blob { opacity: .34; }

.aurora .grid {
  position: absolute; inset: -1px;
  background-image: linear-gradient(var(--line-soft) 1px, transparent 1px), linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 20%, transparent 75%);
  opacity: .55;
}

@keyframes drift1 { to { transform: translate3d(8vw, 6vw, 0) scale(1.16); } }
@keyframes drift2 { to { transform: translate3d(-10vw, 8vw, 0) scale(1.1); } }
@keyframes drift3 { to { transform: translate3d(6vw, -8vw, 0) scale(1.2); } }

/* Навигация --------------------------------------------------- */
.nav {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; gap: 18px;
  padding: 14px clamp(16px, 4vw, 48px);
  backdrop-filter: blur(14px) saturate(160%);
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  border-bottom: 1px solid transparent;
  transition: border-color .3s var(--ease), background .3s var(--ease);
}
.nav.scrolled { border-bottom-color: var(--line-soft); background: color-mix(in srgb, var(--bg) 88%, transparent); }

.brand { display: flex; align-items: center; gap: 10px; color: var(--text); }
.brand:hover { text-decoration: none; }
.brand-mark { display: grid; place-items: center; transition: transform .4s var(--ease-out); }
.brand:hover .brand-mark { transform: rotate(90deg) scale(1.06); }
.brand-name { font-size: 20px; font-weight: 650; letter-spacing: -.03em; }

.nav-links { display: flex; gap: 4px; margin-left: 18px; }
.nav-links a {
  padding: 8px 14px; border-radius: var(--r-full);
  color: var(--text-2); font-size: 14.5px; font-weight: 500;
  transition: background .2s var(--ease), color .2s var(--ease);
}
.nav-links a:hover { background: var(--surface-2); color: var(--text); text-decoration: none; }
.nav-actions { display: flex; align-items: center; gap: 8px; margin-left: auto; }
.nav-cta { height: 42px; padding: 0 20px; font-size: 14.5px; }

main { position: relative; z-index: 1; }

/* Герой ------------------------------------------------------- */
.hero {
  max-width: 1000px; margin: 0 auto;
  padding: clamp(48px, 9vw, 110px) clamp(20px, 5vw, 32px) 40px;
  text-align: center;
}

.pill {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 7px 16px 7px 12px; margin-bottom: 26px;
  border: 1px solid var(--line); border-radius: var(--r-full);
  background: color-mix(in srgb, var(--surface) 70%, transparent);
  font-size: 13.5px; font-weight: 500; color: var(--text-2);
  box-shadow: var(--shadow-1);
}
.pill .dot {
  width: 7px; height: 7px; border-radius: 50%; background: var(--green);
  box-shadow: 0 0 0 4px rgba(52, 168, 83, .18);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse { 50% { box-shadow: 0 0 0 8px rgba(52, 168, 83, 0); } }

.hero-title {
  font-size: clamp(38px, 7.4vw, 76px);
  font-weight: 680; letter-spacing: -.045em; line-height: 1.04;
  margin-bottom: 22px;
}
.hero-sub {
  max-width: 640px; margin: 0 auto 34px;
  font-size: clamp(16px, 2vw, 19px); color: var(--text-2); line-height: 1.62;
}
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.btn-lg { height: 54px; padding: 0 30px; font-size: 16px; }
.hero-note { margin-top: 18px; font-size: 13.5px; color: var(--text-3); }

/* Мокап чата --------------------------------------------------- */
.mock {
  margin-top: 58px; text-align: left;
  border: 1px solid var(--line); border-radius: var(--r-xl);
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  box-shadow: var(--shadow-2);
  overflow: hidden;
  transform: perspective(1400px) rotateX(7deg);
  transform-origin: top center;
}
.mock-bar {
  display: flex; align-items: center; gap: 7px;
  padding: 13px 18px; border-bottom: 1px solid var(--line-soft);
  background: var(--surface-2);
}
.tl { width: 11px; height: 11px; border-radius: 50%; }
.tl.r { background: #ff5f57; } .tl.y { background: #febc2e; } .tl.g { background: #28c840; }
.mock-url { margin-left: 12px; font-size: 12.5px; color: var(--text-3); font-family: var(--mono); }

.mock-body { padding: 26px clamp(18px, 4vw, 34px) 34px; display: grid; gap: 22px; }
.mock-row.user { display: flex; justify-content: flex-end; }
.mock-bubble {
  max-width: 70%; padding: 12px 18px; border-radius: 20px 20px 6px 20px;
  background: var(--grad); color: #fff; font-size: 15px;
}
.mock-row.bot { display: flex; gap: 14px; }
.mock-ava {
  flex: none; width: 32px; height: 32px; border-radius: 50%;
  background: var(--grad); box-shadow: 0 0 0 4px color-mix(in srgb, var(--blue) 12%, transparent);
}
.mock-answer { flex: 1; }
.mock-think {
  padding: 12px 16px; margin-bottom: 16px;
  border-radius: var(--r-md); border: 1px dashed var(--line);
  background: var(--surface-2);
  font-size: 13px; color: var(--text-3);
}
.mock-think em { display: block; margin-top: 6px; font-style: normal; opacity: .82; }
.spark {
  display: inline-block; width: 9px; height: 9px; margin-right: 6px;
  background: var(--grad); border-radius: 2px;
  animation: spin 2.6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.mock-lines { display: grid; gap: 11px; }
.mock-lines span { height: 11px; border-radius: var(--r-full); background: var(--surface-3); }
.mock-lines span.code { height: 62px; border-radius: var(--r-sm); background: var(--code-bg); border: 1px solid var(--line-soft); width: 100%; }
.mock-lines span.caret { position: relative; }
.mock-lines span.caret::after {
  content: ''; position: absolute; right: -12px; top: -2px; width: 3px; height: 15px;
  background: var(--blue); border-radius: 2px; animation: blink 1.05s steps(2) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* Секции ------------------------------------------------------ */
.section {
  max-width: 1120px; margin: 0 auto;
  padding: clamp(64px, 10vw, 120px) clamp(20px, 5vw, 32px);
  text-align: center;
}
.eyebrow {
  font-size: 13px; font-weight: 600; letter-spacing: .16em; text-transform: uppercase;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
  margin-bottom: 14px;
}
.section-title { font-size: clamp(28px, 4.4vw, 46px); letter-spacing: -.035em; margin-bottom: 16px; }
.section-sub { max-width: 620px; margin: 0 auto; color: var(--text-2); font-size: 17px; }
.section-sub.left { margin: 0; }

.cards {
  display: grid; gap: 18px; margin-top: 52px; text-align: left;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}
.card {
  padding: 26px 24px 24px;
  border: 1px solid var(--line); border-radius: var(--r-lg);
  background: color-mix(in srgb, var(--surface) 82%, transparent);
  transition: transform .35s var(--ease-out), border-color .3s var(--ease), box-shadow .35s var(--ease);
}
.card:hover { transform: translateY(-4px); border-color: color-mix(in srgb, var(--blue) 34%, var(--line)); box-shadow: var(--glow); }
.card h3 { font-size: 18.5px; margin: 16px 0 8px; letter-spacing: -.02em; }
.card p { color: var(--text-2); font-size: 14.8px; line-height: 1.58; }
.ic { display: grid; place-items: center; width: 46px; height: 46px; border-radius: 14px; color: #fff; }
.ic-blue { background: linear-gradient(140deg, #4285f4, #6aa1ff); }
.ic-violet { background: linear-gradient(140deg, #8b5cf6, #b98ae0); }
.ic-pink { background: linear-gradient(140deg, #e0576a, #ff8a7a); }
.ic-green { background: linear-gradient(140deg, #1f9d55, #52c98c); }
.ic-yellow { background: linear-gradient(140deg, #d99e00, #f5c451); }
.ic-cyan { background: linear-gradient(140deg, #0d9bb5, #56cfe1); }

/* Блок «ход мыслей» -------------------------------------------- */
.split {
  display: grid; gap: clamp(32px, 6vw, 72px); align-items: center;
  grid-template-columns: 1fr 1fr; text-align: left; max-width: 1180px;
}
.checks { list-style: none; padding: 0; margin: 26px 0 30px; display: grid; gap: 12px; }
.checks li { position: relative; padding-left: 32px; color: var(--text-2); font-size: 15.5px; }
.checks li::before {
  content: ''; position: absolute; left: 0; top: 3px; width: 20px; height: 20px; border-radius: 50%;
  background: var(--grad);
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='none' stroke='%23000' stroke-width='3' stroke-linecap='round' stroke-linejoin='round' d='m5 12.5 4.5 4.5L19 7'/%3E%3C/svg%3E") center/16px no-repeat;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='none' stroke='%23000' stroke-width='3' stroke-linecap='round' stroke-linejoin='round' d='m5 12.5 4.5 4.5L19 7'/%3E%3C/svg%3E") center/16px no-repeat;
}

.think-demo {
  border: 1px solid var(--line); border-radius: var(--r-lg);
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  box-shadow: var(--shadow-2); overflow: hidden;
}
.think-head {
  display: flex; align-items: center; gap: 8px;
  padding: 14px 18px; border-bottom: 1px solid var(--line-soft);
  background: var(--surface-2); font-size: 13.5px; color: var(--text-3); font-weight: 500;
}
.think-head svg { margin-left: auto; }
.think-body {
  padding: 18px; min-height: 132px;
  font-family: var(--mono); font-size: 12.8px; line-height: 1.72; color: var(--text-3);
  white-space: pre-wrap;
}
.think-body::after {
  content: '▍'; color: var(--blue); animation: blink 1.05s steps(2) infinite;
}
.think-answer {
  padding: 18px; border-top: 1px solid var(--line-soft);
  font-size: 15px; color: var(--text); background: var(--bg-tint);
}

/* FAQ ---------------------------------------------------------- */
.faq { max-width: 760px; margin: 44px auto 0; text-align: left; display: grid; gap: 12px; }
.faq details {
  border: 1px solid var(--line); border-radius: var(--r-md);
  background: color-mix(in srgb, var(--surface) 82%, transparent);
  transition: border-color .25s var(--ease), background .25s var(--ease);
}
.faq details[open] { border-color: color-mix(in srgb, var(--blue) 30%, var(--line)); }
.faq summary {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 17px 20px; cursor: pointer; font-weight: 550; font-size: 16px;
  list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq p { padding: 0 20px 18px; color: var(--text-2); font-size: 15px; }
.chev {
  flex: none; width: 10px; height: 10px; border-right: 2px solid var(--text-3); border-bottom: 2px solid var(--text-3);
  transform: rotate(45deg); transition: transform .28s var(--ease); margin-bottom: 3px;
}
.faq details[open] .chev { transform: rotate(-135deg); margin-bottom: -3px; }

/* CTA + футер -------------------------------------------------- */
.cta-band { padding: 0 clamp(20px, 5vw, 32px) clamp(70px, 9vw, 110px); }
.cta-inner {
  max-width: 1120px; margin: 0 auto; padding: clamp(44px, 7vw, 76px) 28px;
  border-radius: var(--r-xl); text-align: center;
  background: var(--grad); color: #fff;
  box-shadow: 0 24px 70px rgba(90, 100, 220, .34);
  position: relative; overflow: hidden;
}
.cta-inner::after {
  content: ''; position: absolute; inset: -40% -10% auto; height: 220%;
  background: radial-gradient(ellipse at 50% 0%, rgba(255, 255, 255, .32), transparent 62%);
  pointer-events: none;
}
.cta-inner h2 { font-size: clamp(26px, 4vw, 42px); letter-spacing: -.035em; margin-bottom: 12px; }
.cta-inner p { opacity: .92; margin-bottom: 28px; font-size: 17px; }
.cta-inner .btn-primary { background: #fff; color: #1a1d24; box-shadow: 0 8px 26px rgba(0, 0, 0, .2); }

.footer {
  display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
  max-width: 1120px; margin: 0 auto;
  padding: 26px clamp(20px, 5vw, 32px) 44px;
  border-top: 1px solid var(--line-soft);
  position: relative; z-index: 1;
}
.foot-brand { display: flex; align-items: center; gap: 8px; font-weight: 600; letter-spacing: -.02em; }
.foot-note { color: var(--text-3); font-size: 13.5px; margin-left: auto; }
.foot-link { font-size: 14px; font-weight: 550; }

/* Появление при скролле ---------------------------------------- */
.reveal { opacity: 0; transform: translateY(20px); }
.reveal.in {
  opacity: 1; transform: none;
  transition: opacity .7s var(--ease-out), transform .7s var(--ease-out);
  transition-delay: calc(var(--d, 0) * 80ms);
}

@media (max-width: 900px) {
  .split { grid-template-columns: 1fr; }
  .nav-links { display: none; }
}
@media (max-width: 560px) {
  .mock { transform: none; }
  .mock-bubble { max-width: 88%; }
  .foot-note { margin-left: 0; order: 3; width: 100%; }
  .hero-cta .btn { flex: 1 1 100%; }
}