/* ========== features grid ========== */
.features {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 1px; background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
}
.feature {
  background: var(--bg);
  padding: 36px 32px 32px;
  position: relative;
  transition: background .25s;
  min-height: 240px;
  display: flex; flex-direction: column;
}
.feature:hover { background: var(--bg-2); }
.feature .badge {
  font-family: var(--mono); font-size: 10px; color: var(--ink-3);
  letter-spacing: .14em; text-transform: uppercase; margin-bottom: 18px;
}
.feature .badge .num { color: var(--accent); }
.feature h4 {
  font-family: var(--serif); font-size: 24px; font-weight: 350;
  letter-spacing: -.01em; margin-bottom: 12px; line-height: 1.2;
}
.feature p {
  color: var(--ink-2); font-size: 15px; line-height: 1.55;
  text-wrap: pretty;
}
.feature .glyph {
  margin-top: auto; padding-top: 24px;
  font-family: var(--mono); font-size: 12px; color: var(--ink-3);
}
.feature .glyph code {
  background: var(--bg-3); border: 1px solid var(--line);
  padding: 4px 10px; border-radius: 100px; color: var(--accent);
  margin-right: 6px; display: inline-block; margin-bottom: 4px;
}

/* ========== quiz teaser ========== */
.quiz {
  display: grid; grid-template-columns: 1fr 1fr;
  background: linear-gradient(135deg, var(--bg-2), var(--bg-3));
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
}
.quiz .qcopy {
  padding: 56px 48px;
  display: flex; flex-direction: column; justify-content: center;
}
.quiz .qcopy h3 {
  font-family: var(--serif); font-size: 44px; font-weight: 350;
  letter-spacing: -.02em; line-height: 1; margin-bottom: 18px;
}
.quiz .qcopy h3 em { font-style: italic; color: var(--accent); }
.quiz .qcopy p { color: var(--ink-2); font-size: 16px; line-height: 1.55; margin-bottom: 24px; max-width: 340px; }
.quiz .qvis {
  background: var(--bg);
  padding: 32px;
  border-left: 1px solid var(--line);
  position: relative;
  min-height: 360px;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--mono);
}
.quiz .qcard {
  width: 100%;
  background: var(--bg-2); border: 1px solid var(--line-2);
  border-radius: var(--r-md); padding: 28px;
}
.quiz .qcard .q-num { font-size: 11px; color: var(--ink-3); letter-spacing: .1em; margin-bottom: 16px; }
.quiz .qcard .q-word {
  font-family: var(--serif); font-style: italic; font-size: 40px; font-weight: 350;
  color: var(--ink); text-align: center; margin: 22px 0;
}
.quiz .qcard .q-opts { display: grid; gap: 8px; }
.quiz .qcard .q-opt {
  border: 1px solid var(--line); padding: 12px 14px;
  border-radius: var(--r-sm); font-family: var(--mono); font-size: 13px;
  display: flex; justify-content: space-between; cursor: pointer;
  transition: all .15s;
  color: var(--ink-2);
}
.quiz .qcard .q-opt:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }
.quiz .qcard .q-opt.correct { border-color: var(--good); color: var(--good); background: rgba(143,214,148,0.08); }
.quiz .qcard .q-opt .pct { color: var(--ink-3); font-size: 11px; }

/* ========== faq ========== */
.faq { display: grid; gap: 0; border-top: 1px solid var(--line); }
.faq .q {
  border-bottom: 1px solid var(--line);
  padding: 26px 0;
  cursor: pointer;
  display: grid; grid-template-columns: auto 1fr auto; gap: 24px;
  align-items: center;
  transition: background .15s;
}
.faq .q:hover { background: var(--bg-2); }
.faq .q .qn {
  font-family: var(--mono); font-size: 11px; color: var(--ink-3);
  letter-spacing: .1em;
}
.faq .q h5 {
  font-family: var(--serif); font-size: 22px; font-weight: 350;
  letter-spacing: -.01em;
}
.faq .q .plus {
  width: 32px; height: 32px; border-radius: 50%;
  border: 1px solid var(--line-2);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--mono); color: var(--ink-2);
  transition: all .2s;
}
.faq .q.open .plus { background: var(--accent); border-color: var(--accent); color: var(--bg); transform: rotate(45deg); }
.faq .a {
  max-height: 0; overflow: hidden;
  transition: max-height .35s ease;
  border-bottom: 1px solid transparent;
}
.faq .q.open + .a { max-height: 400px; border-bottom-color: var(--line); }
.faq .a-inner {
  padding: 0 56px 28px 56px;
  font-size: 16px; line-height: 1.6; color: var(--ink-2);
  max-width: 760px;
  text-wrap: pretty;
}
.faq .a-inner code { font-family: var(--mono); font-size: .9em; background: var(--bg-2); padding: 2px 6px; border-radius: 4px; color: var(--accent); border: 1px solid var(--line); }

/* ========== footer ========== */
footer {
  border-top: 1px solid var(--line);
  padding: 80px 0 40px;
  position: relative;
  margin-top: 80px;
}
footer .foot-grid {
  display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 48px; margin-bottom: 60px;
}
footer .foot-grid h6 {
  font-family: var(--mono); font-size: 11px; color: var(--ink-3);
  text-transform: uppercase; letter-spacing: .12em; margin-bottom: 18px;
}
footer .foot-grid a {
  color: var(--ink-2); text-decoration: none;
  display: block; margin-bottom: 10px;
  font-family: var(--serif); font-size: 16px;
  transition: color .2s;
}
footer .foot-grid a:hover { color: var(--accent); }
footer .foot-tagline {
  font-family: var(--serif); font-size: 22px; line-height: 1.4;
  color: var(--ink); max-width: 320px;
  font-style: italic;
  font-weight: 350;
}
footer .foot-tagline em { color: var(--accent); font-style: normal; }
footer .legal {
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 28px; border-top: 1px solid var(--line);
  font-family: var(--mono); font-size: 11px; color: var(--ink-3);
  letter-spacing: .04em;
}
footer .legal .yr { cursor: pointer; }
footer .legal .yr:hover { color: var(--accent); }

/* GIANT FOOTER MARK */
footer .mark {
  font-family: var(--serif);
  font-size: clamp(120px, 22vw, 320px);
  font-style: italic; font-weight: 350;
  letter-spacing: -.05em; line-height: 0.85;
  color: var(--bg-2);
  margin-top: 40px;
  margin-bottom: -40px;
  user-select: none;
  cursor: pointer;
  text-align: center;
  transition: color .4s;
}
footer .mark:hover { color: var(--accent-soft); }
footer .mark em { font-style: normal; }

/* ========== command palette ========== */
.palette-mask {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(8,5,3,0.7);
  backdrop-filter: blur(8px);
  display: flex; align-items: flex-start; justify-content: center;
  padding-top: 14vh;
  opacity: 0; pointer-events: none;
  transition: opacity .2s;
}
.palette-mask.open { opacity: 1; pointer-events: auto; }
.palette {
  width: min(640px, 92vw);
  background: var(--bg-2);
  border: 1px solid var(--line-2);
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: 0 60px 100px -30px rgba(0,0,0,.7), 0 0 0 1px rgba(143,214,148,.15);
  transform: translateY(-12px); opacity: 0;
  transition: all .25s;
}
.palette-mask.open .palette { transform: translateY(0); opacity: 1; }
.palette .input-row {
  display: flex; align-items: center;
  padding: 18px 22px; gap: 14px;
  border-bottom: 1px solid var(--line);
}
.palette .input-row .glyph { color: var(--accent); font-family: var(--mono); }
.palette input {
  flex: 1; border: none; outline: none; background: transparent;
  font-family: var(--mono); font-size: 16px; color: var(--ink);
  letter-spacing: -.01em;
}
.palette input::placeholder { color: var(--ink-3); }
.palette .esc {
  font-family: var(--mono); font-size: 10px;
  padding: 4px 8px; border: 1px solid var(--line-2);
  border-radius: 4px; color: var(--ink-3);
}
.palette .results { max-height: 380px; overflow-y: auto; }
.palette .row {
  display: grid; grid-template-columns: auto 1fr auto auto; gap: 18px;
  align-items: center;
  padding: 14px 22px;
  cursor: pointer;
  transition: background .12s;
  border-left: 2px solid transparent;
}
.palette .row.active { background: var(--bg-3); border-left-color: var(--accent); }
.palette .row .pw {
  font-family: var(--mono); font-size: 14px; color: var(--ink); font-weight: 500;
  min-width: 100px;
}
.palette .row .pipa { font-family: var(--mono); font-size: 12px; color: var(--accent); }
.palette .row .presp { font-family: var(--serif); font-style: italic; font-size: 14px; color: var(--ink-2); }
.palette .row .pkey { font-family: var(--mono); font-size: 10px; color: var(--ink-3); }
.palette .foot {
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 22px;
  border-top: 1px solid var(--line);
  font-family: var(--mono); font-size: 10px; color: var(--ink-3);
  background: var(--bg-3);
  letter-spacing: .04em;
}
.palette .foot .keys span {
  display: inline-flex; align-items: center; gap: 4px;
  margin-right: 14px;
}
.palette .foot kbd {
  font-family: var(--mono); font-size: 9px;
  padding: 1px 5px; background: var(--bg); border-radius: 3px;
  border: 1px solid var(--line);
}

/* ========== Easter-egg HUD ========== */
.egg-hud {
  position: fixed; bottom: 24px; left: 24px;
  z-index: 60;
  font-family: var(--mono); font-size: 11px;
  background: rgba(20,16,12,.92);
  backdrop-filter: blur(10px);
  border: 1px solid var(--line-2);
  border-radius: var(--r-md);
  padding: 14px 16px;
  max-width: 280px;
  color: var(--ink-2);
  box-shadow: 0 20px 40px -10px rgba(0,0,0,.5);
}
.egg-hud h6 {
  font-size: 10px; color: var(--accent); letter-spacing: .14em;
  text-transform: uppercase; margin-bottom: 10px;
  display: flex; justify-content: space-between; align-items: center;
}
.egg-hud h6 .close { cursor: pointer; color: var(--ink-3); }
.egg-hud h6 .close:hover { color: var(--accent); }
.egg-hud ul { list-style: none; display: grid; gap: 6px; }
.egg-hud li {
  display: grid; grid-template-columns: 18px 1fr;
  gap: 10px; align-items: center;
  color: var(--ink-3); font-size: 11px;
  transition: color .2s;
}
.egg-hud li.found { color: var(--good); }
.egg-hud li.found::before { content: "✓"; color: var(--good); }
.egg-hud li:not(.found)::before { content: "·"; color: var(--ink-3); text-align: center; }

/* toast */
.toast {
  position: fixed; top: 80px; right: 24px; z-index: 70;
  background: var(--bg-2); border: 1px solid var(--accent);
  color: var(--ink); padding: 14px 18px;
  border-radius: var(--r-md);
  font-family: var(--mono); font-size: 13px;
  max-width: 320px;
  box-shadow: 0 20px 40px -10px rgba(0,0,0,.5), 0 0 0 1px var(--accent-soft);
  transform: translateX(calc(100% + 40px));
  transition: transform .35s cubic-bezier(.2,.8,.2,1.2);
}
.toast.show { transform: translateX(0); }
.toast .t-eyebrow {
  font-size: 10px; color: var(--accent); letter-spacing: .12em;
  text-transform: uppercase; margin-bottom: 6px;
}

/* ripples */
.ripple {
  position: fixed; pointer-events: none;
  border-radius: 50%; border: 2px solid var(--accent);
  z-index: 999;
  animation: ripple 0.9s ease-out forwards;
}
@keyframes ripple {
  0% { width: 0; height: 0; opacity: .8; }
  100% { width: 180px; height: 180px; opacity: 0; transform: translate(-50%, -50%); margin-top: 0; }
}

/* karaoke overlay */
.karaoke {
  position: fixed; inset: 0; z-index: 150;
  background: radial-gradient(ellipse at center, #1c1812, #0d0a07);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none;
  transition: opacity .4s;
  flex-direction: column;
  gap: 32px;
}
.karaoke.on { opacity: 1; pointer-events: auto; }
.karaoke .lyric {
  font-family: var(--serif);
  font-size: clamp(48px, 8vw, 120px);
  font-style: italic; font-weight: 350;
  letter-spacing: -.02em;
  color: var(--ink);
  text-align: center;
  max-width: 90vw;
}
.karaoke .lyric .hit { color: var(--accent); }
.karaoke .sub {
  font-family: var(--mono); color: var(--ink-3); font-size: 13px;
  letter-spacing: .1em;
}
.karaoke .ex {
  position: absolute; top: 32px; right: 32px;
  font-family: var(--mono); font-size: 12px; color: var(--ink-3);
  cursor: pointer;
  padding: 8px 14px; border: 1px solid var(--line-2); border-radius: var(--r-sm);
}
.karaoke .ex:hover { color: var(--accent); border-color: var(--accent); }

@media (max-width: 900px) {
  .hero-grid, .terminal-split, .features, .quiz, .famous, footer .foot-grid {
    grid-template-columns: 1fr !important;
  }
  .try-grid { grid-template-columns: repeat(2, 1fr); }
  .metrics { grid-template-columns: repeat(2, 1fr); }
  .metric { border-bottom: 1px solid var(--line); padding: 16px; }
  .nav a { display: none; }
  .nav a.cta, .nav .kbd { display: inline-flex; }
}

/* ========== H5 / phone (≤ 640px) ========== */
@media (max-width: 640px) {
  .shell { padding: 0 18px; }
  .section { padding-top: 64px; padding-bottom: 64px; }

  /* topbar */
  .topbar { padding: 14px 0; }
  .brand { font-size: 18px; gap: 10px; }
  .brand .dot { width: 22px; height: 22px; }
  .brand .dot::after { inset: 5px; }
  .brand .dot::before { inset: 8px; }
  .nav .kbd { display: none; }
  .nav a.cta { font-size: 11px; padding: 8px 12px; }

  /* hero */
  .hero { padding-top: 36px; padding-bottom: 56px; }
  .hero .eyebrow { font-size: 10px; margin-bottom: 24px; }
  .hero h1 {
    font-size: clamp(40px, 11vw, 64px);
    line-height: 1.02;
    letter-spacing: -.03em;
    margin-bottom: 24px;
  }
  .hero h1 .word {
    padding: 2px 14px 4px;
    gap: 10px;
    border-radius: 12px;
  }
  .hero h1 .word .speaker { width: 26px; height: 26px; }
  .hero .lede { font-size: 16px; margin-bottom: 28px; }
  .cta-row { flex-direction: column; align-items: stretch; }
  .cta-row .btn { justify-content: center; }
  .btn { font-size: 12px; padding: 12px 18px; }

  /* hero metrics */
  .metrics { margin-top: 48px; padding: 0; }
  .metric {
    padding: 18px 14px;
    border-right: none !important;
    border-bottom: 1px solid var(--line);
  }
  .metric:last-child { border-bottom: none; }
  .metric .n { font-size: 30px; }
  .metric .l { font-size: 10px; margin-top: 6px; }

  /* wave panel */
  .wave-panel { padding: 16px; }
  .wave-canvas { height: 100px; }
  .wave-foot { margin-top: 14px; padding-top: 12px; flex-wrap: wrap; gap: 8px; }
  .wave-foot .src { font-size: 9px; }

  /* section heads */
  .section-head {
    grid-template-columns: 1fr;
    gap: 10px;
    margin-bottom: 32px;
    padding-bottom: 18px;
  }
  .section-head h2 { font-size: 32px; }
  .section-head .aside { text-align: left; max-width: 100%; font-size: 11px; }
  .section-head .idx { padding-top: 0; }

  /* word grid */
  .try-grid { grid-template-columns: 1fr; gap: 10px; }
  .word-card { padding: 18px; }
  .word-card .w { font-size: 16px; }

  /* famous */
  .famous .moment {
    grid-template-columns: 1fr;
    padding: 22px 20px;
    gap: 12px;
  }
  .famous .moment .word { font-size: 22px; }
  .famous .moment .said { font-size: 18px; }
  .famous .moment .src {
    border-left: none;
    border-top: 1px dashed var(--line);
    padding-left: 0; padding-top: 12px;
    text-align: left; max-width: 100%;
  }

  /* terminal */
  .terminal-split { gap: 28px; }
  .terminal-split .copy h3 { font-size: 28px; }
  .terminal-split .copy p { font-size: 15px; }
  .terminal-body { padding: 20px 18px; font-size: 11.5px; min-height: 280px; }
  .terminal-body .ln { word-break: break-word; }
  .install { padding: 12px 14px; font-size: 12px; flex-wrap: wrap; }
  .install .copy-state { width: 100%; margin-left: 0; padding-top: 4px; }

  /* features */
  .feature { padding: 28px 22px 24px; min-height: 0; }
  .feature h4 { font-size: 21px; }
  .feature p { font-size: 14px; }

  /* quiz */
  .quiz .qcopy { padding: 36px 24px 24px; }
  .quiz .qvis {
    padding: 24px;
    border-left: none;
    border-top: 1px solid var(--line);
    min-height: 0;
  }
  .quiz .qcopy h3 { font-size: 32px; }
  .quiz .qcopy p { font-size: 15px; }
  .quiz .qcard { padding: 20px; }
  .quiz .qcard .q-word { font-size: 32px; margin: 16px 0; }
  .quiz .qcard .q-opt { font-size: 12px; padding: 10px 12px; }

  /* faq */
  .faq .q {
    grid-template-columns: auto 1fr auto;
    gap: 14px;
    padding: 20px 0;
  }
  .faq .q h5 { font-size: 17px; line-height: 1.3; }
  .faq .q .plus { width: 26px; height: 26px; font-size: 12px; }
  .faq .a-inner { padding: 0 0 24px 32px; font-size: 14px; }

  /* footer */
  footer { padding: 56px 0 28px; margin-top: 40px; }
  footer .foot-grid {
    grid-template-columns: 1fr 1fr !important;
    gap: 28px 18px;
    margin-bottom: 40px;
  }
  footer .foot-tagline { grid-column: 1 / -1; font-size: 18px; }
  footer .foot-grid h6 { margin-bottom: 12px; }
  footer .foot-grid a { font-size: 15px; margin-bottom: 8px; }
  footer .legal {
    flex-direction: column; gap: 8px; align-items: flex-start;
    font-size: 10px;
  }
  footer .mark { font-size: clamp(72px, 26vw, 140px); margin-bottom: -20px; }

  /* HUD + toast + palette on mobile */
  .egg-hud {
    bottom: 10px; left: 10px; right: 10px;
    max-width: none;
    padding: 12px 14px;
  }
  .egg-hud ul {
    grid-template-columns: 1fr 1fr;
    column-gap: 12px;
  }
  .toast { right: 10px; left: 10px; top: 70px; max-width: none; transform: translateY(-160px); }
  .toast.show { transform: translateY(0); }

  .palette-mask { padding-top: 6vh; padding-left: 12px; padding-right: 12px; }
  .palette { width: 100%; }
  .palette .input-row { padding: 14px 16px; }
  .palette input { font-size: 14px; }
  .palette .row {
    grid-template-columns: auto 1fr auto;
    gap: 10px;
    padding: 12px 16px;
  }
  .palette .row .pipa { display: none; }
  .palette .row .pw { min-width: 70px; font-size: 13px; }
  .palette .row .presp { font-size: 12px; }
  .palette .foot { padding: 10px 16px; flex-wrap: wrap; gap: 6px; }
  .palette .foot .keys span { margin-right: 10px; }

  .karaoke { gap: 20px; padding: 0 18px; }
  .karaoke .lyric { font-size: clamp(36px, 11vw, 64px); }
  .karaoke .ex { top: 16px; right: 16px; font-size: 10px; padding: 6px 10px; }
}

/* ========== very narrow (≤ 380px) ========== */
@media (max-width: 380px) {
  .hero h1 { font-size: 38px; }
  .hero h1 .word { font-size: 22px; padding: 1px 12px 3px; }
  .hero h1 .word .speaker { width: 22px; height: 22px; }
  .section-head h2 { font-size: 28px; }
  .quiz .qcard .q-word { font-size: 26px; }
  footer .foot-grid { grid-template-columns: 1fr !important; }
}