/* Презентация Альбо Медиа — токены из design.md / styles.css */
:root {
  --cream: #F9F2E9;
  --cream-deep: #F0E8DC;
  --beige: #D4C4B0;
  --charcoal: #2D2926;
  --gold: #B89C72;
  --gold-hover: #a68a62;
  --gold-light: rgba(184, 156, 114, 0.14);
  --white: #ffffff;

  --font-serif: "Cormorant Garamond", "Times New Roman", serif;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --container: min(1120px, 92vw);
  --radius-pill: 999px;
  --radius-sm: 3px;
  --transition: 0.35s cubic-bezier(0.25, 0.8, 0.25, 1);
  --header-h: 72px;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.7;
  color: var(--charcoal);
  background: var(--cream);
  -webkit-font-smoothing: antialiased;
}

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

a { color: inherit; text-decoration: none; transition: color var(--transition); }

.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); border: 0;
}

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

/* Шапка */
.header {
  position: fixed; inset: 0 0 auto; z-index: 100;
  background: rgba(249, 242, 233, 0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(212, 196, 176, 0.45);
}

.header__inner {
  display: flex; align-items: center; justify-content: space-between;
  min-height: var(--header-h); gap: 1rem;
  position: relative;
}

.logo { display: flex; align-items: center; gap: 0.85rem; flex-shrink: 0; }
.logo:hover { opacity: 0.88; }
.logo__mark { width: 3.2rem; flex-shrink: 0; line-height: 0; }
.logo__mark-img { width: 100%; height: auto; }
.logo__wordmark { display: flex; flex-direction: column; min-width: 0; }
.logo__name {
  font-family: var(--font-serif); font-size: 1rem; font-weight: 500;
  letter-spacing: 0.1em; text-transform: uppercase; line-height: 1.05;
}
.logo__tagline {
  font-size: 7px; font-weight: 600; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--gold); margin-top: 0.2rem;
}

.header__meta {
  font-size: 10px; font-weight: 600; letter-spacing: 0.14em;
  text-transform: uppercase; color: rgba(45, 41, 38, 0.65);
  text-align: right; line-height: 1.4;
}

.header__site-link {
  position: absolute; left: 50%; transform: translateX(-50%);
  display: inline-flex; align-items: center; justify-content: center;
  padding: 0.65rem 1rem;
  border: 1px solid var(--beige); border-radius: var(--radius-pill);
  font-size: 10px; font-weight: 700; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--charcoal);
  background: rgba(240, 232, 220, 0.55);
}
.header__site-link:hover { color: var(--gold); border-color: var(--gold); }

.nav-toggle {
  display: none; flex-direction: column; justify-content: center; gap: 5px;
  width: 42px; height: 42px; padding: 0; border: 1px solid var(--beige);
  background: var(--cream-deep); border-radius: var(--radius-sm); cursor: pointer;
}
.nav-toggle__bar { display: block; width: 18px; height: 2px; margin-inline: auto; background: var(--charcoal); transition: var(--transition); }
.nav-toggle.is-active .nav-toggle__bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-active .nav-toggle__bar:nth-child(2) { opacity: 0; }
.nav-toggle.is-active .nav-toggle__bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Боковая навигация */
.deck-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 0;
  padding-top: var(--header-h);
}

.deck-nav {
  position: sticky; top: var(--header-h);
  align-self: start;
  max-height: calc(100vh - var(--header-h));
  overflow-y: auto;
  padding: 1.25rem 0.75rem 2rem 1rem;
  border-right: 1px solid rgba(212, 196, 176, 0.5);
  background: rgba(240, 232, 220, 0.35);
}

.deck-nav__label {
  font-size: 9px; font-weight: 700; letter-spacing: 0.2em;
  text-transform: uppercase; color: var(--gold); margin: 0 0 0.75rem 0.5rem;
}

.deck-nav a {
  display: block; padding: 0.45rem 0.55rem; margin-bottom: 0.15rem;
  font-size: 11px; font-weight: 500; letter-spacing: 0.04em;
  border-radius: var(--radius-sm); color: rgba(45, 41, 38, 0.75);
  border-left: 2px solid transparent;
}
.deck-nav a:hover { color: var(--charcoal); background: var(--gold-light); }
.deck-nav a.is-active {
  color: var(--charcoal); font-weight: 600;
  border-left-color: var(--gold); background: var(--gold-light);
}

.deck-main { min-width: 0; }

/* Секции-слайды */
.slide {
  padding: 3.5rem 0;
  border-bottom: 1px solid rgba(212, 196, 176, 0.35);
}
.slide:nth-child(even) { background: rgba(240, 232, 220, 0.28); }

.slide__inner { padding-inline: clamp(1rem, 4vw, 2.5rem); }

.slide__eyebrow {
  font-size: 10px; font-weight: 700; letter-spacing: 0.22em;
  text-transform: uppercase; color: var(--gold); margin-bottom: 0.65rem;
}

.slide__num {
  font-family: var(--font-serif); font-size: 0.95rem; font-weight: 500;
  letter-spacing: 0.12em; color: rgba(45, 41, 38, 0.45); margin-bottom: 0.35rem;
}

.slide__title {
  font-family: var(--font-serif); font-size: clamp(1.6rem, 3.5vw, 2.35rem);
  font-weight: 500; letter-spacing: 0.06em; text-transform: uppercase;
  line-height: 1.15; margin: 0 0 1rem;
}

.slide__lead {
  font-size: 1rem; color: rgba(45, 41, 38, 0.82);
  max-width: 42rem; margin: 0 0 1.75rem;
}

.slide__grid {
  display: grid; gap: 1.5rem;
}
.slide__grid--2 { grid-template-columns: repeat(2, 1fr); }
.slide__grid--3 { grid-template-columns: repeat(3, 1fr); }
.slide__grid--4 { grid-template-columns: repeat(4, 1fr); }
.slide__grid--split { grid-template-columns: 1fr 1fr; align-items: start; }

/* Карточки */
.card {
  background: var(--cream);
  border: 1px solid rgba(212, 196, 176, 0.65);
  border-radius: var(--radius-sm);
  padding: 1.35rem 1.25rem;
  box-shadow: 0 6px 20px rgba(40, 43, 43, 0.04);
}
.card--deep { background: var(--cream-deep); }
.card__step {
  font-family: var(--font-serif); font-size: 1.5rem; font-weight: 500;
  color: var(--gold); line-height: 1; margin-bottom: 0.5rem;
}
.card h3 {
  font-family: var(--font-serif); font-size: 0.95rem; font-weight: 500;
  letter-spacing: 0.06em; text-transform: uppercase; margin: 0 0 0.5rem;
}
.card p { margin: 0; font-size: 13px; color: rgba(45, 41, 38, 0.8); line-height: 1.55; }

.site-icon { width: 40px; height: auto; margin-bottom: 0.75rem; }

/* Герой */
.slide--hero {
  padding: 4.5rem 0 4rem;
  background:
    radial-gradient(circle at 85% 20%, rgba(184, 156, 114, 0.12) 0%, transparent 45%),
    var(--cream);
}
.slide--hero .slide__title { font-size: clamp(2rem, 5vw, 3.2rem); }
.slide--hero .slide__subtitle {
  font-family: var(--font-serif); font-size: clamp(1.1rem, 2.5vw, 1.55rem);
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--gold);
  margin-bottom: 1rem;
}
.hero-tags {
  display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 1.5rem 0 0;
}
.hero-tags span {
  font-size: 10px; font-weight: 600; letter-spacing: 0.12em;
  text-transform: uppercase; padding: 0.45rem 0.85rem;
  border: 1px solid var(--beige); border-radius: var(--radius-pill);
  background: var(--cream-deep);
}

/* Скриншоты из презентации */
.slide-shot {
  border: 0;
  border-radius: 0;
  overflow: visible;
  background: transparent;
  box-shadow: none;
}
.slide-shot img {
  width: 100%;
  filter: drop-shadow(0 10px 22px rgba(40, 43, 43, 0.1));
}
.slide-shots { display: grid; gap: 1rem; }
.slide-shots--2 { grid-template-columns: 1fr 1fr; }
.slide-shots--3 { grid-template-columns: repeat(3, 1fr); }

/* Скриншоты телефона держим компактно, чтобы не появлялись пустые полотна. */
.slide__grid--split > .slide-shot,
.slide-shots > .slide-shot,
.compare .slide-shot {
  width: min(100%, 360px);
  justify-self: center;
}

.card .slide-shot {
  width: min(100%, 280px);
  margin-inline: auto;
}

/* Маршрут — стрелки */
.route-flow {
  display: flex; flex-wrap: wrap; align-items: stretch; gap: 0.5rem;
}
.route-flow__item {
  flex: 1 1 140px; min-width: 120px;
  background: var(--cream); border: 1px solid rgba(212, 196, 176, 0.65);
  border-radius: var(--radius-sm); padding: 1rem; text-align: center;
}
.route-flow__item strong {
  display: block; font-family: var(--font-serif); font-size: 1.4rem;
  color: var(--gold); margin-bottom: 0.25rem;
}
.route-flow__arrow { align-self: center; color: var(--gold); font-size: 1.2rem; flex-shrink: 0; }

/* Промпт-блок */
.prompt-box {
  background: var(--charcoal); color: var(--cream);
  border-radius: var(--radius-sm); padding: 1.25rem 1.35rem;
  font-size: 13px; line-height: 1.65; white-space: pre-line;
}
.prompt-box__label {
  font-size: 9px; font-weight: 700; letter-spacing: 0.2em;
  text-transform: uppercase; color: var(--gold); margin-bottom: 0.75rem;
}

.note {
  margin-top: 1.25rem; padding: 0.85rem 1rem;
  background: var(--gold-light); border-left: 3px solid var(--gold);
  font-size: 13px; color: rgba(45, 41, 38, 0.85);
}

/* До/после */
.compare {
  display: grid; grid-template-columns: 1fr auto 1fr; gap: 1rem; align-items: center;
}
.compare__label {
  font-size: 10px; font-weight: 700; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--gold); margin-bottom: 0.5rem;
}
.compare__arrow { font-size: 1.5rem; color: var(--gold); text-align: center; }

/* Финал */
.slide--final {
  text-align: center; padding: 5rem 0;
  background: var(--charcoal); color: var(--cream); border-bottom: none;
}
.slide--final .slide__title { color: var(--cream); }
.slide--final .slide__lead { color: rgba(249, 242, 233, 0.85); margin-inline: auto; }
.slide--final .hero-tags span {
  background: rgba(249, 242, 233, 0.08); border-color: rgba(184, 156, 114, 0.45); color: var(--cream);
}

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 0.95rem 2rem; font-size: 11px; font-weight: 600;
  letter-spacing: 0.13em; text-transform: uppercase;
  border: none; border-radius: var(--radius-pill); cursor: pointer;
  transition: var(--transition);
}
.btn--gold { background: var(--gold); color: var(--cream); margin-top: 1.5rem; }
.btn--gold:hover { background: var(--gold-hover); transform: translateY(-2px); }

.footer {
  padding: 2rem 0 2.5rem; text-align: center;
  font-size: 11px; color: rgba(45, 41, 38, 0.6);
  letter-spacing: 0.06em;
}
.footer a { color: var(--gold); border-bottom: 1px solid transparent; }
.footer a:hover { border-bottom-color: var(--gold); }

/* Прогресс */
.progress-bar {
  position: fixed; top: var(--header-h); left: 0; right: 0; height: 3px;
  background: rgba(212, 196, 176, 0.35); z-index: 99;
}
.progress-bar__fill {
  height: 100%; width: 0; background: var(--gold);
  transition: width 0.15s ease-out;
}

@media (max-width: 960px) {
  .deck-layout { grid-template-columns: 1fr; }
  .deck-nav { display: none; position: fixed; inset: var(--header-h) 0 0; z-index: 90; background: var(--cream); padding: 1rem; }
  .deck-nav.is-open { display: block; }
  .nav-toggle { display: flex; }
  .header__meta { display: none; }
  .slide__grid--2, .slide__grid--3, .slide__grid--4, .slide__grid--split,
  .slide-shots--2, .slide-shots--3, .compare { grid-template-columns: 1fr; }
  .compare__arrow { transform: rotate(90deg); }
  .route-flow__arrow { display: none; }
}