/* ИИ-выходные — mobile-first landing */

@font-face {
  font-family: "Lack";
  src: url("../fonts/Lack-Regular.otf") format("opentype");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Lack";
  src: url("../fonts/Lack-Italic.otf") format("opentype");
  font-weight: 100 900;
  font-style: italic;
  font-display: swap;
}

:root {
  --accent: #6139e7;
  --accent-ink: #ffffff;
  --accent-soft: color-mix(in srgb, var(--accent) 12%, #ffffff);
  --accent-softer: color-mix(in srgb, var(--accent) 6%, #ffffff);
  --accent-deep: #4a24c4;

  --surface: #faf9fc;
  --surface-elevated: #ffffff;
  --surface-sunken: #f1eff8;
  --surface-dark: #12101a;
  --surface-dark-elevated: #1c1830;

  --ink: #12101a;
  --ink-muted: #5c5770;
  --ink-subtle: #918ba8;
  --ink-on-dark: #f5f3ff;
  --ink-muted-on-dark: #b4aed0;

  --hairline: #e6e2f2;
  --hairline-strong: #d2cce6;
  --hairline-on-dark: rgba(255, 255, 255, 0.12);

  --radius: 14px;
  --radius-sm: 8px;
  --radius-lg: 22px;

  --font-display: "Lack", system-ui, sans-serif;
  --font-body: "Manrope", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;

  --space: clamp(1rem, 4vw, 1.5rem);
  --wrap: min(1120px, calc(100% - 2 * var(--space)));
  --wrap-narrow: min(720px, calc(100% - 2 * var(--space)));

  --ease-out: cubic-bezier(0.32, 0.72, 0, 1);
  --shadow-accent: 0 12px 40px color-mix(in srgb, var(--accent) 28%, transparent);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--ink);
  background: var(--surface);
  text-rendering: optimizeLegibility;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1.5px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--accent-deep);
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--accent);
  color: var(--accent-ink);
  padding: 0.6rem 1rem;
  z-index: 100;
}

.skip-link:focus {
  left: var(--space);
  top: var(--space);
}

.wrap {
  width: var(--wrap);
  margin-inline: auto;
}

.wrap-narrow {
  width: var(--wrap-narrow);
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  background: color-mix(in srgb, var(--surface) 86%, transparent);
  border-bottom: 1px solid color-mix(in srgb, var(--hairline) 70%, transparent);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-height: 3.75rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-display);
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration: none;
}

.logo:hover {
  color: var(--ink);
}

.logo-mark {
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 3px;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}

.nav {
  display: none;
  gap: 1.25rem;
  margin-left: auto;
  margin-right: 0.75rem;
}

.nav a {
  color: var(--ink-muted);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
}

.nav a:hover {
  color: var(--ink);
}

.site-header .btn-sm {
  margin-left: auto;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  min-height: 3rem;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-sm);
  border: 1.5px solid transparent;
  font-family: var(--font-body);
  font-size: 0.98rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  text-decoration: none;
  cursor: pointer;
  transition: transform 120ms var(--ease-out), background 150ms ease, border-color 150ms ease, color 150ms ease, box-shadow 150ms ease;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: var(--accent);
  color: var(--accent-ink);
  box-shadow: var(--shadow-accent);
}

.btn-primary:hover {
  background: var(--accent-deep);
  color: var(--accent-ink);
}

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--hairline-strong);
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-sm {
  min-height: 2.4rem;
  padding: 0.45rem 0.9rem;
  font-size: 0.88rem;
  background: var(--ink);
  color: var(--ink-on-dark);
}

.btn-sm:hover {
  background: var(--accent);
  color: var(--accent-ink);
}

.btn-block {
  width: 100%;
}

/* Hero */
.hero {
  position: relative;
  overflow: clip;
  padding: 2rem 0 3rem;
  display: flex;
  align-items: center;
}

.hero-glow {
  position: absolute;
  inset: -10% -20% auto auto;
  width: min(70vw, 520px);
  height: min(70vw, 520px);
  background: radial-gradient(circle, color-mix(in srgb, var(--accent) 28%, transparent) 0%, transparent 68%);
  pointer-events: none;
  animation: glow-drift 9s ease-in-out infinite alternate;
}

@keyframes glow-drift {
  from { transform: translate(0, 0) scale(1); }
  to { transform: translate(-8%, 12%) scale(1.08); }
}

.hero-grid {
  position: relative;
  display: grid;
  gap: 2.5rem;
}

.kicker,
.eyebrow {
  margin: 0 0 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent);
}

.hero-title {
  margin: 0 0 1.25rem;
}

.brand-line {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(2.15rem, 9.5vw, 4.4rem);
  font-weight: 800;
  line-height: 1.02;
  letter-spacing: -0.04em;
  color: var(--accent);
  margin-bottom: 0.55rem;
}

.hero-sub {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 5.4vw, 2.45rem);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.035em;
  color: var(--ink);
}

.hero-lead {
  margin: 0 0 1.5rem;
  max-width: 34rem;
  color: var(--ink-muted);
  font-size: 1.05rem;
}

.hero-cta {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.hero-meta {
  margin: 0;
  font-size: 0.95rem;
  color: var(--ink-subtle);
  max-width: 28rem;
}

/* Hero art */
.hero-visual {
  position: relative;
  margin-inline: calc(-1 * var(--space));
  isolation: isolate;
}

.hero-art {
  display: block;
  width: 100%;
  height: auto;
  max-width: 520px;
  margin-inline: auto;
  border-radius: 50%;
}

/* Sections */
.section {
  padding: 4.5rem 0;
}

.section-tight {
  padding-top: 2rem;
}

.section-tint {
  background: var(--accent-softer);
}

.section-dark {
  background: var(--surface-dark);
  color: var(--ink-on-dark);
}

.section-dark .eyebrow {
  color: #b9a8ff;
}

.section-dark h2 {
  color: var(--ink-on-dark);
}

.section-dark p {
  color: var(--ink-muted-on-dark);
}

.section-head {
  max-width: 40rem;
  margin-bottom: 2rem;
}

.section-head h2 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(1.65rem, 5.5vw, 2.6rem);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.035em;
}

.section-head p {
  margin: 0 0 0.85rem;
  color: var(--ink-muted);
}

.section-head p:last-child {
  margin-bottom: 0;
}

/* Day strip */
.day-strip {
  list-style: none;
  margin: 0 0 1.75rem;
  padding: 0;
  display: grid;
  gap: 0.85rem;
}

.day-strip li {
  display: grid;
  grid-template-columns: 3rem 1fr;
  gap: 0.85rem;
  padding: 1.15rem 1.1rem;
  background: var(--surface-elevated);
  border: 1.5px solid var(--hairline);
  border-radius: var(--radius);
}

.day-strip .num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--accent);
  padding-top: 0.2rem;
}

.day-strip strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 0.25rem;
}

.day-strip p {
  margin: 0;
  color: var(--ink-muted);
  font-size: 0.98rem;
}

.callout {
  margin: 0;
  padding: 1.25rem 1.2rem;
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-weight: 600;
  letter-spacing: -0.01em;
}

/* Quest grid */
.quest-grid {
  list-style: none;
  margin: 0 0 1.5rem;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.quest {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  min-height: 4.25rem;
  padding: 1rem 1.15rem;
  background: var(--surface-elevated);
  border: 1.5px solid var(--hairline);
  border-radius: var(--radius);
  font-family: var(--font-display);
  font-size: clamp(1rem, 3.8vw, 1.2rem);
  font-weight: 600;
  letter-spacing: -0.025em;
  transition: border-color 160ms ease, transform 160ms var(--ease-out);
}

.quest:hover {
  border-color: color-mix(in srgb, var(--accent) 45%, var(--hairline));
  transform: translateY(-2px);
}

.q-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--accent);
}

.note {
  margin: 0;
  color: var(--ink-muted);
  max-width: 42rem;
}

/* Why */
.why-list {
  display: grid;
  gap: 1.5rem;
}

.why-item {
  padding-top: 1.5rem;
  border-top: 1px solid var(--hairline);
}

.why-item h3 {
  margin: 0 0 0.65rem;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 3.5vw, 1.4rem);
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.25;
}

.why-item h3::before {
  content: "";
  display: inline-block;
  width: 0.55rem;
  height: 0.55rem;
  margin-right: 0.55rem;
  margin-bottom: 0.1rem;
  border-radius: 2px;
  background: var(--accent);
  vertical-align: middle;
}

.why-item p {
  margin: 0;
  color: var(--ink-muted);
}

/* Program */
.prog-block {
  padding: 1.5rem 0;
  border-top: 1px solid var(--hairline-on-dark);
}

.prog-block:last-of-type {
  border-bottom: 1px solid var(--hairline-on-dark);
  margin-bottom: 1.5rem;
}

.prog-label {
  display: inline-block;
  margin-bottom: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #b9a8ff;
}

.prog-head h3 {
  margin: 0 0 0.55rem;
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 4vw, 1.55rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--ink-on-dark);
}

.prog-goal {
  margin: 0 0 1rem !important;
  color: var(--ink-muted-on-dark) !important;
  font-size: 0.98rem;
}

.prog-points {
  margin: 0 0 1rem;
  padding: 0;
  list-style: none;
}

.prog-points li {
  position: relative;
  padding: 0.45rem 0 0.45rem 1.15rem;
  color: var(--ink-on-dark);
  border-bottom: 1px solid var(--hairline-on-dark);
}

.prog-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.95rem;
  width: 0.4rem;
  height: 0.4rem;
  border-radius: 1px;
  background: var(--accent);
}

.prog-out {
  margin: 0 !important;
  padding: 0.9rem 1rem;
  border-radius: var(--radius-sm);
  background: var(--surface-dark-elevated);
  color: #d7ceff !important;
  font-weight: 600;
}

.afterparty {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--ink-on-dark) !important;
}

/* Pills */
.pill-cloud {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.pill-cloud li {
  padding: 0.7rem 1rem;
  background: var(--surface-elevated);
  border: 1.5px solid var(--hairline);
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: -0.01em;
}

/* Audience split */
.split-grid {
  display: grid;
  gap: 2.5rem;
}

.split-yes h2,
.split-no h2 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 4.5vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.split-yes p,
.split-no p {
  color: var(--ink-muted);
}

.split-lead {
  margin: 1.25rem 0 0.75rem !important;
  color: var(--ink) !important;
  font-weight: 700;
}

.check-list {
  margin: 0 0 1.25rem;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding: 0.75rem 0 0.75rem 1.35rem;
  border-bottom: 1px solid var(--hairline);
  font-weight: 500;
}

.check-list li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

.friendly {
  margin: 0;
  padding: 1rem 1.1rem;
  background: var(--accent-soft);
  border-radius: var(--radius);
  color: var(--ink) !important;
  font-weight: 600;
}

.split-no {
  padding: 1.35rem 1.2rem;
  background: var(--surface-sunken);
  border-radius: var(--radius-lg);
  border: 1.5px solid var(--hairline);
}

/* Hosts */
.hosts-grid {
  display: grid;
  gap: 2rem;
}

.host-photo {
  margin-bottom: 1.15rem;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 1;
  background: var(--surface-sunken);
}

.host-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  transition: transform 400ms var(--ease-out);
}

.host:hover .host-photo img {
  transform: scale(1.03);
}

.host h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.host-role {
  margin: 0 0 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--accent);
}

.host-tg {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin: 0 0 1rem;
  padding: 0.55rem 0.85rem;
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: var(--accent-ink) !important;
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  text-decoration: none !important;
  transition: background 150ms ease, transform 120ms var(--ease-out);
}

.host-tg:hover {
  background: var(--accent-deep);
  color: var(--accent-ink) !important;
  transform: translateY(-1px);
}

.host-tg-icon {
  width: 1.15rem;
  height: 1.15rem;
  flex-shrink: 0;
  fill: currentColor;
}

.host-body > p:last-child {
  margin: 0;
  color: var(--ink-muted);
}

/* Timepad */
.timepad-wrap {
  max-width: 720px;
  margin-inline: auto;
  min-height: 320px;
  padding: 0.25rem;
  border-radius: var(--radius-lg);
  background: var(--surface-elevated);
  border: 1.5px solid var(--hairline);
  overflow: hidden;
}

.timepad-wrap iframe,
.timepad-wrap > div {
  width: 100% !important;
  max-width: 100%;
}

/* FAQ */
.faq details {
  border-bottom: 1px solid var(--hairline-strong);
  padding: 0.35rem 0;
}

.faq summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.1rem 0;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::after {
  content: "+";
  flex-shrink: 0;
  width: 1.6rem;
  height: 1.6rem;
  display: grid;
  place-items: center;
  border-radius: 6px;
  background: var(--accent-soft);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 500;
  transition: transform 180ms var(--ease-out), background 180ms ease;
}

.faq details[open] summary::after {
  content: "–";
  background: var(--accent);
  color: var(--accent-ink);
}

.faq details p {
  margin: 0 0 1.15rem;
  color: var(--ink-muted);
  max-width: 40rem;
}

.final-cta {
  margin-top: 2.5rem;
  padding: 1.5rem 1.25rem;
  border-radius: var(--radius-lg);
  background: var(--surface-dark);
  color: var(--ink-on-dark);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: flex-start;
}

.final-cta p {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-muted-on-dark);
}

/* Footer */
.site-footer {
  padding: 2.5rem 0 3rem;
  border-top: 1px solid var(--hairline);
  background: var(--surface-elevated);
}

.footer-inner {
  display: grid;
  gap: 1.5rem;
}

.footer-brand {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.footer-legal {
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.55;
  color: var(--ink-subtle);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.25rem;
}

.footer-links a {
  color: var(--ink-muted);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
}

.footer-links a:hover {
  color: var(--accent);
}

/* Reveal */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 520ms var(--ease-out), transform 520ms var(--ease-out);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal,
  .hero-glow,
  .host-photo img,
  .quest,
  .btn {
    animation: none !important;
    transition: none !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* Tablet+ */
@media (min-width: 640px) {
  .hero-cta {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .quest-grid {
    grid-template-columns: 1fr 1fr;
  }

  .quest-wide {
    grid-column: 1 / -1;
  }

  .day-strip {
    grid-template-columns: repeat(3, 1fr);
  }

  .day-strip li {
    grid-template-columns: 1fr;
    min-height: 100%;
  }

  .hosts-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }

  .final-cta {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }

  .footer-inner {
    grid-template-columns: 1fr auto;
    align-items: end;
  }
}

@media (min-width: 880px) {
  .nav {
    display: flex;
  }

  .site-header .btn-sm {
    margin-left: 0;
  }

  .hero {
    padding: 3.5rem 0 4.5rem;
  }

  .hero-grid {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: center;
    gap: 2rem;
  }

  .hero-visual {
    margin-inline: 0;
  }

  .hero-art {
    max-width: none;
  }

  .split-grid {
    grid-template-columns: 1.2fr 0.8fr;
    gap: 3rem;
    align-items: start;
  }

  .why-list {
    grid-template-columns: 1fr 1fr;
    gap: 0 2rem;
  }

  .section {
    padding: 5.5rem 0;
  }
}