@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@400;500;600;700&family=VT323&display=swap');

:root {
  --canvas: #F6F1E7;
  --glow-a: #B9AAF2;
  --glow-b: #8FD8CB;
  --ink: #201D26;
  --muted: #6D6878;
  --surface: #FFFDF7;
  --outline: #201D26;
  --shadow: #201D26;
  --tile-idle: #FFFDF7;
  --tile-input: #EFEAFF;
  --found: #12A995;
  --found-ink: #FFFFFF;
  --found-border: #0C7365;
  --echo: #F2694C;
  --echo-ink: #FFFFFF;
  --echo-border: #A54734;
  --miss: #7A8194;
  --miss-ink: #FFFFFF;
  --miss-border: #535865;
  --accent: #6C5CE7;
  --on-accent: #FFFFFF;
  --grid-dot: rgba(32, 29, 38, 0.045);
  --header-bg: rgba(246, 241, 231, 0.94);
  --radius: 4px;
  --border: 2px;
  --offset: 4px;
  --font-pixel: 'VT323', ui-monospace, monospace;
  --font-sans: 'Outfit', system-ui, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --canvas: #15131D;
    --glow-a: #6C5CE7;
    --glow-b: #12A995;
    --ink: #F2EFFA;
    --muted: #9B96AB;
    --surface: #211E2D;
    --outline: #F2EFFA;
    --shadow: #060509;
    --tile-idle: #211E2D;
    --tile-input: #2C2840;
    --found: #2DD4BF;
    --found-ink: #062420;
    --found-border: #1F9082;
    --echo: #FF8A6B;
    --echo-ink: #2B1006;
    --echo-border: #AE5E49;
    --miss: #454B5E;
    --miss-ink: #C9CCDA;
    --miss-border: #2F3340;
    --accent: #9C8DFF;
    --on-accent: #15131D;
    --grid-dot: rgba(242, 239, 250, 0.08);
    --header-bg: rgba(21, 19, 29, 0.94);
  }
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background-color: var(--canvas);
  background-image: radial-gradient(circle, var(--grid-dot) 1px, transparent 1px);
  background-size: 26px 26px;
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, .pixel {
  font-family: var(--font-pixel);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: 0.04em;
}

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

.container {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Canvas glows (palette canvasGlowA / canvasGlowB) --- */
.drift {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.drift span {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  will-change: transform;
}

.drift .blob-a {
  width: min(70vw, 560px);
  height: min(70vw, 560px);
  top: -10%;
  right: -14%;
  background: color-mix(in srgb, var(--glow-a) 42%, transparent);
  animation: driftA 12s linear infinite;
}

.drift .blob-b {
  width: min(80vw, 620px);
  height: min(80vw, 620px);
  bottom: -20%;
  left: -16%;
  background: color-mix(in srgb, var(--glow-b) 36%, transparent);
  animation: driftB 16s linear infinite;
}

@keyframes driftA {
  from { transform: translate(0, 0); }
  33% { transform: translate(-28px, 22px); }
  66% { transform: translate(18px, -16px); }
  to { transform: translate(0, 0); }
}

@keyframes driftB {
  from { transform: translate(0, 0); }
  40% { transform: translate(32px, -24px); }
  70% { transform: translate(-20px, 18px); }
  to { transform: translate(0, 0); }
}

@media (prefers-reduced-motion: reduce) {
  .drift span, .tile { animation: none !important; }
}

.site-header, main, .footer { position: relative; z-index: 1; }

/* --- Header --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 12px 0;
  background: var(--header-bg);
  border-bottom: 1px solid transparent;
}

.site-header.scrolled { border-bottom-color: color-mix(in srgb, var(--outline) 18%, transparent); }

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

.logo-word {
  font-family: var(--font-pixel);
  font-size: 1.7rem;
  letter-spacing: 0.12em;
}

.menu-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: var(--surface);
  border: var(--border) solid var(--outline);
  border-radius: var(--radius);
  box-shadow: var(--offset) var(--offset) 0 var(--shadow);
  cursor: pointer;
  padding: 10px;
  position: relative;
  z-index: 400;
  -webkit-tap-highlight-color: transparent;
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--ink);
  pointer-events: none;
}

.header-nav {
  display: none;
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100dvh;
  background: var(--canvas);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 28px;
  z-index: 350;
  padding: max(72px, env(safe-area-inset-top, 0px)) 24px max(40px, env(safe-area-inset-bottom, 0px));
}

.header-nav.open { display: flex; }

body.menu-open { overflow: hidden; }

body.menu-open .menu-toggle {
  position: fixed;
  top: max(14px, env(safe-area-inset-top, 0px));
  right: max(16px, env(safe-area-inset-right, 0px));
}

.nav-link {
  font-family: var(--font-pixel);
  font-size: 2.4rem;
  letter-spacing: 0.08em;
}

.nav-buttons { display: flex; flex-direction: column; gap: 12px; width: 100%; max-width: 280px; }

@media (min-width: 900px) {
  .menu-toggle { display: none; }
  .header-nav {
    display: flex;
    position: static;
    width: auto;
    height: auto;
    flex-direction: row;
    background: transparent;
    padding: 0;
    gap: 28px;
  }
  body.menu-open { overflow: auto; }
  body.menu-open .menu-toggle { position: relative; top: auto; right: auto; }
  .nav-link {
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 500;
    letter-spacing: 0;
    color: var(--muted);
  }
  .nav-link:hover { color: var(--ink); }
  .nav-buttons { flex-direction: row; width: auto; max-width: none; }
}

/* --- Pixel buttons --- */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  min-height: 48px;
  border-radius: var(--radius);
  border: var(--border) solid var(--outline);
  box-shadow: var(--offset) var(--offset) 0 var(--shadow);
  font-family: var(--font-pixel);
  font-size: 1.2rem;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: transform 0.08s, box-shadow 0.08s;
  text-align: center;
}

.button:hover {
  transform: translate(1px, 1px);
  box-shadow: 3px 3px 0 var(--shadow);
}

.button:active {
  transform: translate(var(--offset), var(--offset));
  box-shadow: 0 0 0 var(--shadow);
}

.button-accent { background: var(--accent); color: var(--on-accent); }
.button-ink { background: var(--ink); color: var(--canvas); }
.button-found { background: var(--found); color: var(--found-ink); }
.button svg { fill: currentColor; flex-shrink: 0; }

/* --- Hero --- */
.hero {
  min-height: calc(100dvh - 64px);
  display: flex;
  align-items: center;
  padding: 48px 0 64px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  align-items: center;
}

.hero-copy { text-align: center; max-width: 540px; margin: 0 auto; }

.eyebrow {
  font-family: var(--font-pixel);
  font-size: 0.95rem;
  letter-spacing: 0.18em;
  color: var(--muted);
  margin-bottom: 16px;
}

.hero h1 {
  font-size: clamp(2.6rem, 7vw, 4.2rem);
  margin-bottom: 16px;
}

.hero-lead {
  font-size: 1.05rem;
  color: var(--muted);
  margin-bottom: 28px;
  max-width: 440px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.55;
}

.hero-tiles {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 28px;
}

.hero-buttons {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: stretch;
  max-width: 320px;
  margin: 0 auto;
}

#download { scroll-margin-top: 88px; }

.disclaimer {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 16px;
}

.disclaimer a { text-decoration: underline; text-underline-offset: 2px; }

.hero-visual { display: flex; justify-content: center; }

/* --- Letter tiles --- */
.tile {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  border-radius: var(--radius);
  border: var(--border) solid var(--outline);
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1.35rem;
  background: var(--tile-idle);
  color: var(--ink);
  animation: tileIn 0.42s ease both;
}

.tile:nth-child(1) { animation-delay: 0.05s; }
.tile:nth-child(2) { animation-delay: 0.14s; }
.tile:nth-child(3) { animation-delay: 0.23s; }
.tile:nth-child(4) { animation-delay: 0.32s; }

.tile.found { background: var(--found); color: var(--found-ink); border-color: var(--found-border); }
.tile.echo { background: var(--echo); color: var(--echo-ink); border-color: var(--echo-border); }
.tile.miss { background: var(--miss); color: var(--miss-ink); border-color: var(--miss-border); }
.tile.sm { width: 36px; height: 36px; font-size: 0.95rem; animation: none; }

@keyframes tileIn {
  from { opacity: 0; transform: rotateX(90deg); }
  to { opacity: 1; transform: rotateX(0); }
}

/* --- Pixel card --- */
.pixel-card {
  background: var(--surface);
  border: var(--border) solid var(--outline);
  border-radius: var(--radius);
  box-shadow: var(--offset) var(--offset) 0 var(--shadow);
}

.daily-card {
  width: 100%;
  max-width: 360px;
  overflow: hidden;
}

.daily-band {
  height: 112px;
  display: grid;
  place-items: center;
  background: color-mix(in srgb, var(--found) 14%, transparent);
  border-bottom: var(--border) solid var(--outline);
}

.daily-body {
  padding: 18px 20px 22px;
  text-align: center;
}

.daily-body h3 {
  font-size: 1.7rem;
  margin-bottom: 4px;
}

.daily-body p {
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 16px;
}

.share-grid {
  display: flex;
  flex-direction: column;
  gap: 6px;
  align-items: center;
  margin-top: 18px;
}

.share-row { display: flex; gap: 6px; }

/* --- Pixel art --- */
.pix {
  display: grid;
  width: 76px;
  height: 76px;
}

.pix i { display: block; width: 100%; aspect-ratio: 1; }
.p-n { background: transparent; }
.p-i { background: var(--ink); }
.p-t { background: var(--found); }
.p-c { background: var(--echo); }
.p-s { background: var(--miss); }
.p-a { background: var(--accent); }
.p-w { background: var(--found-ink); }

.pix.sm { width: 40px; height: 40px; }

@media (min-width: 600px) {
  .hero-buttons {
    flex-direction: row;
    justify-content: center;
    max-width: none;
    align-items: center;
  }
}

@media (min-width: 900px) {
  .hero-grid { grid-template-columns: 1.05fr 0.95fr; gap: 64px; }
  .hero-copy { text-align: left; margin: 0; }
  .hero-lead { margin-left: 0; margin-right: 0; }
  .hero-tiles, .hero-buttons { justify-content: flex-start; }
  .hero-visual { justify-content: flex-end; }
}

/* --- Sections --- */
.section { padding: 80px 0; }
.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  text-align: center;
  margin-bottom: 12px;
}
.section-lead {
  text-align: center;
  color: var(--muted);
  max-width: 480px;
  margin: 0 auto 40px;
}

.kicker {
  font-family: var(--font-pixel);
  font-size: 0.95rem;
  letter-spacing: 0.16em;
  color: var(--muted);
  margin-bottom: 12px;
  text-align: center;
}

.marks-grid, .how-grid, .modes-grid {
  display: grid;
  gap: 16px;
  max-width: 960px;
  margin: 0 auto;
}

.marks-grid, .how-grid { grid-template-columns: 1fr; }
.modes-grid { grid-template-columns: 1fr; }

@media (min-width: 700px) {
  .marks-grid, .how-grid { grid-template-columns: repeat(3, 1fr); }
  .modes-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 960px) {
  .modes-grid { grid-template-columns: repeat(3, 1fr); }
}

.mark-card, .how-step, .mode-card {
  padding: 20px 18px;
}

.mark-card {
  display: flex;
  align-items: center;
  gap: 14px;
  text-align: left;
}

.mark-card h3, .how-step h3, .mode-card h3 {
  font-size: 1.45rem;
  margin-bottom: 2px;
}

.mark-card p, .how-step p, .mode-card p {
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.45;
}

.how-num {
  font-family: var(--font-pixel);
  font-size: 1rem;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 10px;
}

.mode-card {
  display: flex;
  align-items: center;
  gap: 14px;
  text-align: left;
}

.glyph {
  font-family: var(--font-pixel);
  font-size: 1.1rem;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* --- FAQ --- */
.faq-section { padding: 40px 0 80px; }

.faq-grid {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item { padding: 18px 20px; }

.faq-item summary {
  font-weight: 600;
  font-size: 1.05rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

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

.faq-item summary::after {
  content: '+';
  font-family: var(--font-pixel);
  font-size: 1.5rem;
  color: var(--accent);
  line-height: 1;
}

.faq-item[open] summary::after { content: '×'; }

.faq-item p {
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.95rem;
}

/* --- CTA --- */
.cta-band { padding: 0 0 80px; }

.cta-card {
  padding: 48px 28px;
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}

.cta-card h2 { font-size: clamp(1.8rem, 4vw, 2.6rem); margin-bottom: 10px; }
.cta-card p { color: var(--muted); max-width: 440px; margin: 0 auto 24px; }
.cta-card .hero-buttons { margin-top: 8px; }

/* --- Footer --- */
.footer {
  background: var(--ink);
  color: color-mix(in srgb, var(--canvas) 72%, transparent);
  padding: 56px 0 40px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
}

@media (min-width: 768px) {
  .footer-inner { grid-template-columns: 1.4fr 1fr 1fr; }
}

.footer-brand .logo-word { color: var(--canvas); font-size: 2rem; }
.footer-brand p { font-size: 0.9rem; margin-top: 8px; line-height: 1.5; }

.footer-links h3 {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--canvas);
  margin-bottom: 14px;
}

.footer-links ul { list-style: none; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { font-size: 0.95rem; opacity: 0.8; }
.footer-links a:hover { opacity: 1; }

/* --- Legal --- */
.legal-shell { max-width: 760px; margin: 0 auto; padding: 24px 20px 72px; }
.legal-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 36px;
}
.legal-back { font-weight: 500; color: var(--muted); }
.legal-back:hover { color: var(--ink); }
.legal-doc { padding: 28px 24px 36px; }
.legal-doc h1 { font-size: 2.2rem; margin-bottom: 8px; }
.legal-doc .lead { color: var(--muted); margin-bottom: 24px; }
.legal-doc h2 {
  font-family: var(--font-pixel);
  font-size: 1.4rem;
  margin: 28px 0 8px;
}
.legal-doc p, .legal-doc li { color: var(--muted); margin-bottom: 10px; }
.legal-doc ul { padding-left: 1.2em; margin-bottom: 12px; }
.legal-doc a { text-decoration: underline; text-underline-offset: 2px; }
.legal-doc code { font-family: var(--font-pixel); font-size: 0.95em; color: var(--ink); }

/* --- Handoff join --- */
.join-shell {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  padding: 48px 0;
}
.join-card {
  padding: 36px 28px;
  text-align: center;
  max-width: 460px;
  margin: 0 auto;
}
.join-card .logo {
  justify-content: center;
  margin-bottom: 8px;
}
.join-card h1 { font-size: 2rem; margin: 12px 0 8px; }
.join-card .hero-lead { margin-bottom: 0; }
.join-code {
  margin: 18px 0 24px;
  font-size: 1.7rem;
  color: var(--accent);
}
.join-card .button { width: 100%; }
.join-card .button + .button { margin-top: 12px; }