/* TUTnext Landing Page — layered on top of tutnext-tokens.css */
@import url('assets/tutnext-tokens.css');

* { box-sizing: border-box; }

/* Lock light mode — the tokens file has prefers-color-scheme dark overrides we
   don't want unless the user opts in via body.dark. */
html { color-scheme: light; }

html, body {
  margin: 0;
  background: #fff;
  color: #000;
  overflow-x: hidden;
}

/* Re-declare neutrals at a higher specificity than the @media block in tokens.css */
body:not(.dark) {
  --tut-label: rgb(0, 0, 0);
  --tut-label-secondary: rgba(60, 60, 67, 0.60);
  --tut-label-tertiary: rgba(60, 60, 67, 0.30);
  --tut-separator: rgba(60, 60, 67, 0.29);
  --tut-bg: rgb(255, 255, 255);
  --tut-bg-secondary: rgb(242, 242, 247);
  --tut-bg-tertiary: rgb(255, 255, 255);
  --tut-fill: rgba(120, 120, 128, 0.20);
  --tut-fill-secondary: rgba(120, 120, 128, 0.16);
  --tut-shadow-card: 0 1px 6px rgba(0, 0, 0, 0.10);
  background: #fff;
  color: #000;
}

:root {
  --page-max: 1200px;
  --cream: var(--tut-brand-cream);
  --ink: #1a1a1c;
  --ink-2: rgba(60,60,67,0.72);
  --ink-3: rgba(60,60,67,0.5);
  --hair: rgba(60,60,67,0.14);
}

body.dark {
  --tut-label: rgb(255,255,255);
  --tut-label-secondary: rgba(235,235,245,0.70);
  --tut-label-tertiary: rgba(235,235,245,0.35);
  --tut-separator: rgba(84,84,88,0.65);
  --tut-bg: rgb(0,0,0);
  --tut-bg-secondary: rgb(22,22,24);
  --ink: #fff;
  --ink-2: rgba(235,235,245,0.7);
  --ink-3: rgba(235,235,245,0.45);
  --hair: rgba(255,255,255,0.1);
  --cream: #1c1412;
  background: #000;
  color: #fff;
}

body.dark .tut-bg-card { background: #1c1c1e !important; }

/* --- Nav --- */
.nav {
  position: sticky; top: 0; z-index: 80;
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  background: color-mix(in oklab, var(--tut-bg) 78%, transparent);
  border-bottom: 1px solid var(--hair);
}
.nav-inner {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex; align-items: center; gap: 20px;
}
.nav-brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 17px; letter-spacing: -0.01em;
  color: var(--ink);
}
.nav-brand img { width: 30px; height: 30px; border-radius: 7px; }
.nav-links { display: flex; gap: 22px; margin-left: 20px; flex: 1; }
.nav-links a {
  color: var(--ink-2); text-decoration: none;
  font-size: 14px; font-weight: 500;
}
.nav-links a:hover { color: var(--tut-primary); }
.nav-cta {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 16px; border-radius: 999px;
  background: var(--tut-primary); color: #fff;
  font-size: 14px; font-weight: 600; text-decoration: none;
  box-shadow: 0 2px 6px rgba(244,134,142,0.35);
  transition: transform .15s ease, box-shadow .15s ease;
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 4px 12px rgba(244,134,142,0.45); }

.lang-switch {
  display: inline-flex; border: 1px solid var(--hair); border-radius: 999px;
  padding: 2px; background: var(--tut-bg); gap: 2px;
}
.lang-switch button {
  appearance: none; border: none; background: transparent;
  padding: 5px 10px; font-size: 12px; font-weight: 500;
  border-radius: 999px; cursor: pointer; color: var(--ink-2);
  font-family: inherit;
}
.lang-switch button.on { background: var(--tut-primary); color: #fff; }

.dark-toggle {
  appearance: none;
  display: inline-flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; padding: 0;
  border: 1px solid var(--hair); border-radius: 999px;
  background: var(--tut-bg); color: var(--ink-2);
  cursor: pointer; font: inherit;
  transition: color .2s ease, border-color .2s ease, transform .15s ease;
}
.dark-toggle:hover { color: var(--tut-primary); border-color: var(--tut-primary-ring); transform: translateY(-1px); }

/* --- Sections --- */
section { scroll-margin-top: 80px; }
.sec {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 88px 24px;
}
.sec--cream { background: var(--cream); }
.sec--gray { background: var(--tut-bg-secondary); }
.sec-wide { max-width: none; padding: 0; }
.sec-wide > .inner { max-width: var(--page-max); margin: 0 auto; padding: 88px 24px; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 5px 12px; border-radius: 999px;
  background: var(--tut-primary-soft); color: var(--tut-primary);
  font-size: 12px; font-weight: 600; letter-spacing: 0.02em;
  margin-bottom: 16px;
}

h1.display {
  font-size: clamp(40px, 6vw, 72px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.025em;
  margin: 0 0 20px;
  color: var(--ink);
  text-wrap: balance;
}
h2.section-title {
  font-size: clamp(28px, 3.6vw, 44px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
  color: var(--ink);
  text-wrap: balance;
}
.lede {
  font-size: clamp(16px, 1.4vw, 18px);
  line-height: 1.55;
  color: var(--ink-2);
  max-width: 620px;
  margin: 0 0 28px;
  text-wrap: pretty;
}

.btn-row { display: flex; gap: 12px; flex-wrap: wrap; }
.btn-primary {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 24px; border-radius: 999px;
  background: #000; color: #fff;
  font-size: 15px; font-weight: 600; text-decoration: none;
  box-shadow: 0 4px 14px rgba(0,0,0,0.18);
  transition: transform .15s ease;
}
.btn-primary:hover { transform: translateY(-1px); }
.btn-ghost {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 20px; border-radius: 999px;
  background: transparent; color: var(--ink);
  font-size: 15px; font-weight: 600; text-decoration: none;
  border: 1px solid var(--hair);
}
body.dark .btn-primary { background: #fff; color: #000; }

.meta-row {
  display: flex; gap: 18px; margin-top: 20px;
  font-size: 13px; color: var(--ink-3); flex-wrap: wrap;
  align-items: center;
}
.meta-row span { display: inline-flex; align-items: center; gap: 6px; line-height: 1; }
.dot { width: 4px; height: 4px; border-radius: 999px; background: var(--ink-3); display: inline-block; vertical-align: middle; }

/* --- Feature grid --- */
.feature-grid {
  display: grid; gap: 16px;
  grid-template-columns: repeat(4, 1fr);
}
@media (max-width: 900px) { .feature-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 540px) { .feature-grid { grid-template-columns: 1fr; } }

.feature {
  background: var(--tut-bg);
  border: 1px solid var(--hair);
  border-radius: 20px;
  padding: 24px;
  transition: transform .2s ease, box-shadow .2s ease;
}
.feature:hover { transform: translateY(-2px); box-shadow: 0 12px 32px rgba(0,0,0,0.06); }
.feature-icon {
  width: 40px; height: 40px; border-radius: 10px;
  background: var(--tut-primary-soft); color: var(--tut-primary);
  display: inline-flex; align-items: center; justify-content: center;
  margin-bottom: 18px;
}
.feature h3 { font-size: 17px; font-weight: 600; margin: 0 0 6px; color: var(--ink); letter-spacing: -0.01em; }
.feature p { font-size: 14px; line-height: 1.5; color: var(--ink-2); margin: 0; }

body.dark .feature { background: #1c1c1e; border-color: rgba(84,84,88,0.4); }

/* --- Widget showcase --- */
.widget-row {
  display: grid; gap: 20px;
  grid-template-columns: 1fr 1fr 1.1fr;
  align-items: center;
}
@media (max-width: 900px) { .widget-row { grid-template-columns: 1fr; } }

.widget-card {
  background: #000;
  border-radius: 28px;
  padding: 28px;
  aspect-ratio: 1 / 1;
  color: #fff;
  display: flex; flex-direction: column; justify-content: space-between;
  box-shadow: 0 20px 50px rgba(0,0,0,0.15);
  position: relative; overflow: hidden;
}
.widget-card--light { background: #fff; color: #000; border: 1px solid var(--hair); }

/* --- FAQ --- */
.faq-list { display: flex; flex-direction: column; gap: 0; border-top: 1px solid var(--hair); }
.faq-item { border-bottom: 1px solid var(--hair); }
.faq-q {
  width: 100%; appearance: none; background: none; border: none;
  padding: 20px 0; display: flex; justify-content: space-between; align-items: center;
  font: inherit; font-size: 17px; font-weight: 600; letter-spacing: -0.01em;
  color: var(--ink); text-align: left; cursor: pointer;
}
.faq-item.open .faq-q { color: var(--tut-primary); }
.faq-a { max-height: 0; overflow: hidden; }
.faq-item.open .faq-a { padding-bottom: 20px; max-height: 400px; }
.faq-a p { font-size: 15px; color: var(--ink-2); line-height: 1.55; margin: 0; max-width: 720px; }
.faq-q .chev { color: var(--ink-3); transition: transform .25s ease; }
.faq-item.open .faq-q .chev { transform: rotate(180deg); color: var(--tut-primary); }

/* --- CTA banner --- */
.cta-banner {
  background: var(--tut-primary);
  color: #fff;
  border-radius: 28px;
  padding: 56px 48px;
  display: flex; gap: 24px; align-items: center; justify-content: space-between;
  flex-wrap: wrap;
  position: relative; overflow: hidden;
}
.cta-banner::before {
  content: ''; position: absolute; right: -80px; top: -80px;
  width: 280px; height: 280px; border-radius: 999px;
  background: rgba(255,255,255,0.08);
}
.cta-banner h2 { font-size: clamp(24px, 3vw, 36px); font-weight: 700; margin: 0 0 8px; letter-spacing: -0.02em; }
.cta-banner p { font-size: 16px; opacity: 0.9; margin: 0; max-width: 440px; }
.cta-banner .btn-primary { background: #fff; color: var(--tut-primary); position: relative; z-index: 1; }

/* --- Footer --- */
.footer {
  padding: 48px 24px 32px;
  border-top: 1px solid var(--hair);
  color: var(--ink-3);
  font-size: 13px;
}
.footer-inner { max-width: var(--page-max); margin: 0 auto; display: flex; gap: 24px; justify-content: space-between; align-items: center; flex-wrap: wrap; }
.footer a { color: var(--ink-2); text-decoration: none; margin-right: 16px; }
.footer a:hover { color: var(--tut-primary); }
.credit { font-style: italic; }

/* --- Scroll reveal --- */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: translateY(0); }

/* --- Section layouts (desktop) --- */
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 48px;
  align-items: center;
  min-height: min(80vh, 720px);
}
.hero-phones { position: relative; height: 600px; display: flex; align-items: center; justify-content: center; }
.hero-phone-back { position: absolute; right: -20px; top: 30px; z-index: 1; opacity: 0.85; width: 220px; padding: 6px; border-radius: 28px; background: #1a1a1c; transform: rotate(6deg);
  box-shadow: 0 30px 70px rgba(0,0,0,0.18), 0 2px 0 rgba(255,255,255,0.05) inset, 0 0 0 1px rgba(0,0,0,0.25); }
.hero-phone-back img { width: 100%; display: block; border-radius: 24px; }
.hero-phone-front { position: relative; z-index: 2; width: 280px; padding: 7px; border-radius: 36px; background: #1a1a1c; transform: rotate(-3deg);
  box-shadow: 0 30px 70px rgba(0,0,0,0.18), 0 2px 0 rgba(255,255,255,0.05) inset, 0 0 0 1px rgba(0,0,0,0.25); }
.hero-phone-front img { width: 100%; display: block; border-radius: 30px; }

.widget-row { display: grid; grid-template-columns: 1fr 1.2fr; gap: 56px; align-items: center; }
.widget-imgs { display: grid; grid-template-columns: 1fr 1.6fr; gap: 16px; align-items: center; }

.live-row { display: grid; grid-template-columns: 1fr 1.05fr; gap: 56px; align-items: center; }

.nfc-row { display: grid; grid-template-columns: 1.1fr 1fr; gap: 56px; align-items: center; }

.i18n-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.i18n-card { background: var(--tut-bg); border-radius: 16px; padding: 24px 20px; border: 1px solid var(--hair); }

.gallery-row { display: flex; gap: 32px; justify-content: center; flex-wrap: wrap; }
.gallery-item { display: flex; flex-direction: column; align-items: center; gap: 14px; }
.gallery-phone {
  width: 280px; padding: 7px; border-radius: 36px;
  background: #1a1a1c;
  box-shadow: 0 30px 70px rgba(0,0,0,0.18), 0 2px 0 rgba(255,255,255,0.05) inset, 0 0 0 1px rgba(0,0,0,0.25);
}
.gallery-phone img { width: 100%; display: block; border-radius: 30px; }

/* --- Tablet (<= 900px) --- */
@media (max-width: 900px) {
  .sec { padding: 64px 20px; }
  .sec-wide > .inner { padding: 64px 20px; }

  .nav-inner { padding: 12px 16px; gap: 10px; }
  .nav-links { display: none; }
  .nav-brand span, .nav-brand { font-size: 15px; }
  .nav-brand img { width: 26px; height: 26px; }
  .lang-switch { padding: 2px; }
  .lang-switch button { padding: 5px 8px; font-size: 11px; }
  .nav-cta { padding: 7px 12px; font-size: 12px; }
  .dark-toggle { width: 30px; height: 30px; }

  .hero-grid { grid-template-columns: 1fr; gap: 32px; min-height: auto; }
  .hero-phones { height: auto; min-height: 440px; }

  .widget-row { grid-template-columns: 1fr; gap: 32px; }
  .widget-imgs { grid-template-columns: 1fr 1.6fr; gap: 12px; max-width: 560px; margin: 0 auto; }

  .live-row { grid-template-columns: 1fr; gap: 40px; }

  .nfc-row { grid-template-columns: 1fr; gap: 32px; }
  .nfc-visual { height: 440px !important; }

  .i18n-grid { grid-template-columns: repeat(2, 1fr); }

  .cta-banner { padding: 36px 28px; flex-direction: column; align-items: flex-start; gap: 20px; }
  .cta-banner .btn-primary { align-self: stretch; justify-content: center; }

  .footer-inner { flex-direction: column; align-items: flex-start; gap: 24px; }
}

/* --- Phone (<= 560px) --- */
@media (max-width: 560px) {
  .sec { padding: 48px 18px; }
  .sec-wide > .inner { padding: 48px 18px; }

  h1.display { font-size: clamp(32px, 9vw, 44px); }
  h2.section-title { font-size: clamp(24px, 7vw, 32px); }
  .lede { font-size: 15px; }

  .nav-inner { padding: 10px 12px; gap: 8px; }
  .nav-brand span { display: none; }
  .nav-cta { display: none; }

  /* Hero phones scale down together */
  .hero-phones { min-height: 380px; }
  .hero-phone-front { width: 220px; border-radius: 28px; }
  .hero-phone-front img { border-radius: 24px; }
  .hero-phone-back { width: 170px; right: -4px; top: 16px; border-radius: 22px; }
  .hero-phone-back img { border-radius: 19px; }

  .btn-row { flex-direction: column; align-items: stretch; }
  .btn-primary, .btn-ghost { justify-content: center; }

  .widget-imgs { grid-template-columns: 1fr; gap: 20px; max-width: 320px; }

  /* Live activity phones — stack in 2-col at phone too */
  .live-phones { gap: 10px !important; transform: scale(0.85); transform-origin: top center; }

  .i18n-grid { grid-template-columns: 1fr; }

  .gallery-phone { width: 220px; border-radius: 28px; }
  .gallery-phone img { border-radius: 24px; }

  /* NFC section — simplify positioning for narrow screens */
  .nfc-visual { height: 400px !important; }
  .nfc-visual > div:first-child {
    /* the student card */
    left: 0 !important; top: 4% !important;
    width: 200px !important; height: 124px !important;
  }
  .nfc-visual > div:nth-child(2) > div {
    width: 220px !important;
  }

  .cta-banner { padding: 32px 22px; border-radius: 22px; }
  .cta-banner h2 { font-size: 26px; }

  .footer { padding: 36px 18px 28px; }
}