/* ==========================================================================
   PLAI landing page — tokens sourced from src/theme/colors.ts
   ========================================================================== */

:root {
  --bg: #000000;
  --surface: #0b1220;
  --surface-2: #101a2e;
  --border: #1f2937;
  --text: #f9fafb;
  --muted: #9ca3af;
  --muted-2: #6b7280;
  --accent: #89f336;
  --accent-deep: #4b8a12;
  --on-accent: #0b1500;
  --radius: 16px;
  --radius-lg: 24px;
  --nav-h: 72px;
  --font: 'Poppins', system-ui, -apple-system, 'Segoe UI', sans-serif;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 12px);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body.menu-open {
  overflow: hidden;
}

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

h1,
h2,
h3,
p,
ul,
ol {
  margin: 0;
}

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

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.container {
  width: min(1120px, 100% - 40px);
  margin-inline: auto;
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font);
  font-weight: 600;
  font-size: 15px;
  line-height: 1;
  padding: 13px 24px;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
  white-space: nowrap;
}

.btn-lg {
  padding: 16px 30px;
  font-size: 16px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-deep) 100%);
  color: var(--on-accent);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(137, 243, 54, 0.35);
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}

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

.btn-dark {
  background: #000000;
  color: var(--text);
}

.btn-dark:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.45);
}

/* ==========================================================================
   Header / nav
   ========================================================================== */

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background 0.25s ease, border-color 0.25s ease;
}

.site-header.scrolled {
  background: rgba(0, 0, 0, 0.88);
  backdrop-filter: blur(12px);
  border-bottom-color: var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.nav-logo img {
  width: 86px;
  height: 34px;
  object-fit: contain;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
  padding: 0;
}

.nav-links a {
  color: var(--muted);
  font-size: 15px;
  font-weight: 500;
  transition: color 0.15s ease;
}

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

.nav-cta {
  padding: 11px 22px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
}

.nav-toggle-bar {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle[aria-expanded='true'] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded='true'] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded='true'] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ==========================================================================
   Hero
   ========================================================================== */

.hero {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: min(88vh, 900px);
  padding: calc(var(--nav-h) + 56px) 0 80px;
  overflow: hidden;
}

.hero-media {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.hero-video {
  position: absolute;
  top: 50%;
  left: 50%;
  display: block;
  min-width: 100%;
  min-height: 100%;
  width: auto;
  height: auto;
  transform: translate(-50%, -50%);
  object-fit: cover;
  object-position: center;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
}

.hero-inner {
  position: relative;
  z-index: 2;
  width: 100%;
  display: flex;
  justify-content: center;
}

.hero-copy {
  max-width: 720px;
  text-align: center;
}

.hero-eyebrow {
  display: inline-block;
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border: 1px solid rgba(137, 243, 54, 0.35);
  border-radius: 999px;
  padding: 7px 16px;
  margin-bottom: 24px;
}

.hero-title {
  font-size: clamp(2.6rem, 6vw, 4.2rem);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -0.02em;
}

.hero-title .accent {
  color: var(--accent);
}

.hero-sub {
  color: var(--muted);
  font-size: 18px;
  max-width: 34em;
  margin: 22px auto 0;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  margin-top: 34px;
}

.hero-points {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 26px;
  list-style: none;
  padding: 0;
  margin-top: 30px;
  color: var(--muted-2);
  font-size: 14px;
  font-weight: 500;
}

.hero-points li {
  position: relative;
  padding-left: 18px;
}

.hero-points li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

/* ==========================================================================
   Sections
   ========================================================================== */

.section {
  padding: 96px 0;
}

.section-alt {
  background: linear-gradient(180deg, rgba(11, 18, 32, 0.55), rgba(0, 0, 0, 0));
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-head {
  max-width: 620px;
  margin-bottom: 56px;
}

.section-eyebrow {
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.section-sub {
  color: var(--muted);
  margin-top: 16px;
  font-size: 17px;
}

/* ---------------------------------------------------------------- features */

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(137, 243, 54, 0.45);
}

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border-radius: 13px;
  background: rgba(137, 243, 54, 0.1);
  color: var(--accent);
  margin-bottom: 18px;
}

.feature-icon svg {
  width: 24px;
  height: 24px;
}

.feature-card h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

.feature-card p {
  color: var(--muted);
  font-size: 14.5px;
}

/* ---------------------------------------------------------------- steps */

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  list-style: none;
  padding: 0;
  counter-reset: step;
}

.step {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 24px;
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
  color: var(--on-accent);
  font-weight: 700;
  font-size: 17px;
  margin-bottom: 18px;
}

.step h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

.step p {
  color: var(--muted);
  font-size: 14.5px;
}

/* ---------------------------------------------------------------- strip */

.strip {
  padding: 56px 0;
}

.strip-inner {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.strip-item {
  border-left: 3px solid var(--accent);
  padding-left: 20px;
}

.strip-item h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
}

.strip-item p {
  color: var(--muted);
  font-size: 14px;
}

/* ---------------------------------------------------------------- CTA band */

.cta-band {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-deep) 100%);
  border-radius: var(--radius-lg);
  padding: 56px 48px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 40px;
  color: var(--on-accent);
}

.cta-copy h2 {
  font-size: clamp(1.7rem, 3.5vw, 2.4rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.01em;
}

.cta-copy p {
  margin-top: 14px;
  font-size: 16px;
  font-weight: 500;
  opacity: 0.85;
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}

.store-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: #000;
  color: var(--text);
  border-radius: 12px;
  padding: 10px 18px;
  transition: transform 0.15s ease;
}

.store-badge:hover {
  transform: translateY(-2px);
}

.store-badge svg {
  width: 26px;
  height: 26px;
  flex: none;
}

.store-badge span {
  display: flex;
  flex-direction: column;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.15;
}

.store-badge small {
  font-size: 10px;
  font-weight: 500;
  color: var(--muted);
}

.store-badge--hero {
  padding: 12px 22px;
  border: 1px solid var(--border);
}

.store-badge--hero svg {
  width: 30px;
  height: 30px;
}

.store-badge--hero span {
  font-size: 16px;
}

.store-note {
  width: 100%;
  font-size: 13px;
  font-weight: 500;
  opacity: 0.75;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 72px 0 36px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
}

.footer-brand img {
  width: 86px;
  height: 34px;
  object-fit: contain;
  margin-bottom: 18px;
}

.footer-brand p {
  color: var(--muted);
  font-size: 14px;
  max-width: 26em;
  margin-bottom: 14px;
}

.footer-mail {
  font-weight: 600;
  font-size: 14px;
}

.footer-col h3 {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted-2);
  margin-bottom: 16px;
}

.footer-col ul {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col a {
  color: var(--muted);
  font-size: 14px;
  transition: color 0.15s ease;
}

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

.footer-bottom {
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.footer-bottom p {
  color: var(--muted-2);
  font-size: 13px;
}

/* ==========================================================================
   Scroll reveals
   ========================================================================== */

/* Hidden pre-animation state only applies when JS confirmed it is running. */
html.js .reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

html.js .reveal.visible {
  opacity: 1;
  transform: none;
}

/* Reduced motion or no IntersectionObserver: keep everything visible. */
html.js.no-reveal .reveal {
  opacity: 1;
  transform: none;
  transition: none;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 960px) {
  .hero {
    min-height: 78vh;
  }

  .feature-grid,
  .steps,
  .strip-inner {
    grid-template-columns: repeat(2, 1fr);
  }

  .cta-band {
    grid-template-columns: 1fr;
    padding: 44px 32px;
  }

  .footer-inner {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    bottom: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    padding: 24px 20px;
    background: rgba(0, 0, 0, 0.97);
    border-top: 1px solid var(--border);
    transform: translateX(100%);
    transition: transform 0.25s ease;
    overflow-y: auto;
  }

  .nav-menu.open {
    transform: translateX(0);
  }

  .nav-links {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }

  .nav-links a {
    display: block;
    padding: 14px 6px;
    font-size: 17px;
    border-bottom: 1px solid var(--border);
  }

  .nav-cta {
    margin-top: 16px;
    justify-content: center;
  }
}

@media (max-width: 560px) {
  .feature-grid,
  .steps,
  .strip-inner,
  .footer-inner {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 72px 0;
  }

  .hero {
    padding-bottom: 64px;
  }

  .hero-actions .store-badge {
    flex: 1 1 100%;
    justify-content: center;
  }
}