/* ============================================================
   MISTYOZ AI — home.css
   DeepMind-inspired design system (Material 3 tokens)
   ============================================================ */

/* ---------- Theme tokens ---------- */
:root {
  --font-display: 'Google Sans Flex', system-ui, sans-serif;
  --font-body: 'Google Sans Flex', system-ui, sans-serif;

  --shape-sm: 8px;
  --shape-md: 16px;
  --shape-lg: 24px;
  --shape-pill: 999px;

  --spacer-xs: 8px;
  --spacer-sm: 16px;
  --spacer-md: 24px;
  --spacer-lg: 48px;
  --spacer-xl: 96px;

  --grid-max: 1440px;
  --grid-gutter: 24px;

  /* DeepMind gradient palette */
  --grad-blue:  linear-gradient(90deg, #9dd2ff 35%, #cbebed 90%);
  --grad-pink:  linear-gradient(90deg, #ffacc2 35%, #ffe3ca 90%);
  --grad-green: linear-gradient(90deg, #9be69a 35%, #cbebed 90%);
  --grad-yellow:linear-gradient(90deg, #fff350 35%, #ffe3ca 90%);
  --grad-violet:linear-gradient(135deg, #b8c0ff 0%, #9dd2ff 100%);

  --hero-word-gradient: linear-gradient(90deg, #3c90ff 0%, #12b5cb 60%, #0ebc5f 100%);
}

:root {
  --surface: #121317;
  --on-surface: #f8f9fc;
  --on-surface-variant: #b2bbc5;
  --surface-container: #18191d;
  --surface-container-high: #212226;
  --surface-container-higher: #2f3034;
  --surface-container-highest: #45474d;
  --outline: rgba(230, 234, 240, 0.12);
  --outline-variant: rgba(230, 234, 240, 0.06);
  --card-border: rgba(230, 234, 240, 0.14);
  --card-hover: #202125;
  --header-bg: rgba(18, 19, 23, 0.88);
  --scroll-thumb: #2f3034;
  --line-pattern-primary: rgba(240, 244, 252, 0.12);
  --line-pattern-secondary: rgba(240, 244, 252, 0.06);
}


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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.5;
  color: var(--on-surface);
  background-color: var(--surface);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  transition: background-color .3s ease, color .3s ease;
}

a { color: inherit; text-decoration: none; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.block { display: block; }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  margin: 0;
  text-wrap: balance;
}

p { margin: 0; }

::selection {
  background: #3c90ff;
  color: #fff;
}

::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--scroll-thumb); border-radius: 999px; }
::-webkit-scrollbar-thumb:hover { background: var(--surface-container-highest); }

.container {
  max-width: var(--grid-max);
  margin: 0 auto;
  padding-left: var(--grid-gutter);
  padding-right: var(--grid-gutter);
}


/* ---------- Buttons ---------- */
.display-xl {
  font-size: clamp(3.25rem, 9vw, 9.25rem);
  font-weight: 260;
  letter-spacing: -0.025em;
  line-height: 1.02;
}
.display-lg {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.06;
}
.heading-xl {
  font-size: clamp(2rem, 4.5vw, 3.375rem);
  font-weight: 450;
  letter-spacing: -0.018em;
  line-height: 1.08;
}
.heading-lg {
  font-size: clamp(1.5rem, 3vw, 2.625rem);
  font-weight: 450;
  letter-spacing: -0.014em;
  line-height: 1.12;
}
.eyebrow {
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--on-surface-variant);
}
.body-md { font-size: 1.125rem; line-height: 1.6; }
.body-sm { font-size: 0.9375rem; line-height: 1.6; }
.text-muted { color: var(--on-surface-variant); }


/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 0;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 500;
  line-height: 1.2;
  padding: 12px 22px;
  border-radius: var(--shape-pill);
  background: none;
  color: var(--on-surface);
  transition: background-color .18s ease, color .18s ease, border-color .18s ease;
  text-decoration: none;
}
.btn--protected {
  background: var(--surface-container);
}
.btn--protected:hover { background: var(--surface-container-higher); }
.btn--protected:active { background: var(--surface-container-highest); }

.btn--text-link {
  padding: 6px 4px;
  color: var(--on-surface-variant);
  border-radius: 8px;
}
.btn--text-link:hover { color: var(--on-surface); }
.btn--text-link svg { width: 16px; height: 16px; }

.btn--outlined {
  border: 1px solid var(--outline);
  padding: 10px 22px;
}
.btn--outlined:hover { border-color: var(--on-surface); }

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 0;
  background: none;
  color: var(--on-surface);
  cursor: pointer;
  transition: background-color .18s ease;
}
.icon-btn:hover { background: var(--surface-container); }
.icon-btn svg { width: 18px; height: 18px; }


/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--header-bg);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  backdrop-filter: blur(18px) saturate(160%);
  border-bottom: 1px solid var(--outline-variant);
}
.header-inner {
  max-width: var(--grid-max);
  margin: 0 auto;
  padding: 14px var(--grid-gutter);
  display: flex;
  align-items: center;
  gap: 32px;
}
.header-logo {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--on-surface);
  display: flex;
  align-items: center;
  white-space: nowrap;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
}
.header-nav a {
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--on-surface-variant);
  transition: color .18s ease, background-color .18s ease;
}
.header-nav a:hover {
  color: var(--on-surface);
  background: var(--surface-container);
}
.header-nav a.is-current {
  color: var(--on-surface);
  background: var(--surface-container);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 4px;
}

.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0 12px;
  border: 0;
  background: none;
  cursor: pointer;
}
.hamburger span {
  display: block;
  height: 2px;
  width: 100%;
  border-radius: 2px;
  background: var(--on-surface);
  transition: transform .28s cubic-bezier(.4,0,.2,1), opacity .2s ease;
}
.hamburger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.is-open span:nth-child(2) { opacity: 0; }
.hamburger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile menu */
.mobile-menu {
  display: none;
  border-top: 1px solid var(--outline-variant);
  background: var(--header-bg);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
}
.mobile-menu.is-open { display: block; }
.mobile-menu nav {
  max-width: var(--grid-max);
  margin: 0 auto;
  padding: 12px var(--grid-gutter) 24px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.mobile-menu a {
  padding: 12px 14px;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--on-surface);
}
.mobile-menu a:hover { background: var(--surface-container); }


/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: clamp(96px, 14vh, 160px) 0 clamp(80px, 12vh, 140px);
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  left: -10%;
  width: 70vw;
  height: 70vw;
  max-width: 900px;
  max-height: 900px;
  background: radial-gradient(circle, rgba(156, 210, 255, 0.16) 0%, transparent 62%);
  pointer-events: none;
  z-index: 0;
}
.hero__inner {
  position: relative;
  z-index: 1;
  max-width: var(--grid-max);
  margin: 0 auto;
  padding: 0 var(--grid-gutter);
}
.hero__title {
  margin-bottom: 28px;
  max-width: 14ch;
}
.hero__rotating {
  position: relative;
  display: block;
  overflow: hidden;
  height: 1.04em;
}
.hero__rotating .rotating-word {
  position: absolute;
  left: 0;
  top: 0;
  display: block;
  background: var(--hero-word-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  transition: transform .6s cubic-bezier(.16,1,.3,1), opacity .6s ease;
  will-change: transform, opacity;
}
.hero__rotating .word-next   { transform: translateY(110%); opacity: 0; }
.hero__rotating .word-active { transform: translateY(0);    opacity: 1; }
.hero__rotating .word-prev   { transform: translateY(-110%); opacity: 0; }

.hero__subtitle {
  max-width: 560px;
  color: var(--on-surface-variant);
  margin-bottom: 36px;
}
.hero__ctas {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
}


/* ---------- Section header ---------- */
.section {
  padding: clamp(64px, 9vw, 112px) 0;
}
.section--top-bordered {
  border-top: 1px solid var(--outline-variant);
}
.section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 32px;
  margin-bottom: clamp(36px, 5vw, 56px);
}
.section-header__title { margin-bottom: 8px; }
.section-header__subtitle {
  color: var(--on-surface-variant);
  max-width: 480px;
}
.section-header__ctas { flex-shrink: 0; }


/* ---------- Cards ---------- */
.card {
  background: var(--surface-container);
  border: 1px solid var(--outline-variant);
  border-radius: var(--shape-lg);
  transition: background-color .22s ease, border-color .22s ease, transform .22s ease;
}
.card--link { cursor: pointer; }
.card--link:hover {
  background: var(--card-hover);
  border-color: var(--outline);
}

.card--model {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
}
.card--model .card__media {
  position: relative;
  aspect-ratio: 1 / 1;
  border-radius: var(--shape-lg);
  overflow: hidden;
  margin-bottom: 24px;
}
.card--model .card__body {
  display: flex;
  flex-direction: column;
  flex: 1;
}
.card--model .card__title { margin-bottom: 10px; }
.card--model .card__text {
  color: var(--on-surface-variant);
  flex: 1;
}
.card--model .card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--outline-variant);
}

/* Media tile */
.media-tile {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.media-tile--blue   { background: var(--grad-blue); }
.media-tile--violet { background: var(--grad-violet); }
.media-tile--green  { background: var(--grad-green); }
.media-tile--pink   { background: var(--grad-pink); }

.media-tile__pattern {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.media-tile__badge {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 2;
  padding: 4px 12px;
  border-radius: var(--shape-pill);
  background: rgba(18, 19, 23, 0.72);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}


/* ---------- Carousel ---------- */
.carousel { position: relative; }

.carousel__viewport {
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
  -ms-overflow-style: none;
  margin-bottom: 32px;
}
.carousel__viewport::-webkit-scrollbar { display: none; }

.carousel__track {
  display: flex;
  gap: var(--grid-gutter);
}

.carousel__slide {
  flex: 0 0 100%;
  scroll-snap-align: start;
}

.carousel__nav {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}
.carousel__button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1px solid var(--outline);
  background: var(--surface);
  color: var(--on-surface);
  cursor: pointer;
  transition: background-color .18s ease, border-color .18s ease, opacity .18s ease;
}
.carousel__button:hover:not(:disabled) {
  background: var(--surface-container);
  border-color: var(--on-surface);
}
.carousel__button:disabled {
  opacity: 0.35;
  cursor: default;
}
.carousel__button svg { width: 20px; height: 20px; }


/* ---------- News ---------- */
.news-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
}
.news-card__media {
  position: relative;
  aspect-ratio: 16 / 9;
  border-radius: var(--shape-lg);
  overflow: hidden;
  margin-bottom: 24px;
}
.news-card__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
  padding: 0 24px;
}
.news-card__meta .meta-tag {
  padding: 4px 12px;
  border-radius: var(--shape-pill);
  background: var(--surface-container-high);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--on-surface-variant);
}
.news-card__title { margin: 0 24px 16px; }
.news-card__text {
  color: var(--on-surface-variant);
  flex: 1;
  padding: 0 24px;
}
.news-card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin-top: 24px;
  padding: 0 24px 24px;
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--grid-gutter);
}
.news-grid__featured { grid-column: span 7; }
.news-grid__rest { grid-column: span 5; }
.news-placeholder {
  border: 1px dashed var(--outline);
  border-radius: var(--shape-lg);
  min-height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--on-surface-variant);
  font-size: 0.9375rem;
}


/* ---------- Vision / values ---------- */
.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--grid-gutter);
}
.value-card {
  padding: 32px;
}
.value-card__title { margin-bottom: 2px; }
.value-card__text { color: var(--on-surface-variant); }


/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--outline-variant);
  background: var(--surface);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: 48px;
  padding: 64px 0 48px;
}
.footer-brand {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 12px;
  display: inline-block;
  transition: color .18s ease;
}
a.footer-brand:hover { color: var(--on-surface-variant); }
.footer-brand__desc {
  color: var(--on-surface-variant);
  font-size: 0.9375rem;
  max-width: 260px;
}
.footer-col__title {
  display: block;
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--on-surface-variant);
  margin-bottom: 20px;
}
.footer-col a.footer-col__title {
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--on-surface-variant);
  margin-bottom: 20px;
  transition: color .18s ease;
}
.footer-col a.footer-col__title:hover { color: var(--on-surface); }
.footer-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.footer-col a {
  font-size: 0.9375rem;
  color: var(--on-surface-variant);
  transition: color .18s ease;
}
.footer-col a:hover { color: var(--on-surface); }

.footer-legal {
  border-top: 1px solid var(--outline-variant);
  padding: 24px 0 32px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.footer-legal__links {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
}
.footer-legal__links a {
  font-size: 0.875rem;
  color: var(--on-surface-variant);
  transition: color .18s ease;
}
.footer-legal__links a:hover { color: var(--on-surface); }
.footer-legal__copy {
  font-size: 0.875rem;
  color: var(--on-surface-variant);
}


/* ---------- Reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .6s ease, transform .6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}


/* ---------- Responsive ---------- */
@media (min-width: 640px) {
  .carousel__slide { flex-basis: calc(50% - (var(--grid-gutter) / 2)); }
}

@media (min-width: 1024px) {
  .carousel__slide { flex-basis: calc(33.333% - (var(--grid-gutter) * 2 / 3)); }
}

@media (max-width: 1023px) {
  .header-nav { display: none; }
  .hamburger { display: flex; }
  .values-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 767px) {
  .values-grid { grid-template-columns: 1fr; }
  .news-grid__featured { grid-column: span 12; }
  .news-grid__rest { grid-column: span 12; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px 24px; }
  .footer-brand-wrap { grid-column: span 2; }
  .section-header { flex-direction: column; align-items: flex-start; gap: 16px; }
}

@media (min-width: 768px) {
  .card--model .card__media { aspect-ratio: 16 / 10; }
}