/* ============================================================
   MOMO — editorial dark landing. Serif display + grotesk body +
   mono accents. One mint accent, no gradients, no sparkles.
   ============================================================ */

:root {
  --ink:    #0b0d10;   /* page */
  --ink-2:  #101318;   /* elevated */
  --panel:  #161a20;
  --panel-2:#1c212a;
  --line:   rgba(255,255,255,.09);
  --line-2: rgba(255,255,255,.055);
  --fg:     #eceef1;
  --fg-dim: #b7bec7;
  --muted:  #838d99;
  --mint:   #5fd0c4;
  --mint-2: #7fe0d4;
  --mint-ink:#06201d;
  --amber:  #e6b566;
  --ok:     #63c495;
  --danger: #e2726b;

  --serif: "Fraunces", Georgia, "Times New Roman", serif;
  --sans:  "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono:  "JetBrains Mono", ui-monospace, "Cascadia Code", Consolas, monospace;

  --wrap: 1160px;
  --ease: cubic-bezier(.22,.61,.36,1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--ink);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* subtle vignette so flat black has depth without decorative gradients */
body::before {
  content: "";
  position: fixed; inset: 0;
  background: radial-gradient(120% 90% at 78% -5%, rgba(95,208,196,.06), transparent 55%);
  pointer-events: none; z-index: 0;
}

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 28px; }
img { max-width: 100%; display: block; }
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;
}
.skip-link {
  position: absolute; left: -999px; top: 8px; z-index: 100;
  background: var(--mint); color: var(--mint-ink); padding: 8px 14px; border-radius: 8px; font-weight: 600;
}
.skip-link:focus { left: 12px; }
:focus-visible { outline: 2px solid var(--mint); outline-offset: 3px; border-radius: 4px; }

/* ---------------- typography ---------------- */
h1, h2, h3 { font-family: var(--serif); font-weight: 500; letter-spacing: -0.01em; margin: 0; }
h1 { font-size: clamp(2.7rem, 6.4vw, 5rem); line-height: 1.02; letter-spacing: -0.025em; }
h1 em { font-style: italic; color: var(--mint); font-weight: 500; }
h2 { font-size: clamp(2rem, 4vw, 3rem); line-height: 1.06; }
h3 { font-size: 1.32rem; line-height: 1.2; }

.kicker {
  font-family: var(--mono); font-size: .74rem; letter-spacing: .16em;
  text-transform: uppercase; color: var(--mint); margin: 0 0 18px;
}

/* ---------------- buttons ---------------- */
.btn {
  display: inline-flex; align-items: center; gap: 9px;
  font-family: var(--sans); font-weight: 600; font-size: .96rem;
  padding: 12px 20px; border-radius: 11px; cursor: pointer;
  border: 1px solid transparent;
  transition: transform .16s var(--ease), background .16s, border-color .16s, color .16s;
  white-space: nowrap;
}
.btn-lg { padding: 15px 26px; font-size: 1.02rem; }
.btn-fill { background: var(--mint); color: var(--mint-ink); }
.btn-fill:hover { background: var(--mint-2); transform: translateY(-2px); }
.btn-line { border-color: var(--line); color: var(--fg); background: transparent; }
.btn-line:hover { border-color: var(--mint); color: var(--mint); transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

/* ---------------- header ---------------- */
.hdr {
  position: sticky; top: 0; z-index: 40; border-bottom: 1px solid transparent;
  transition: background .25s, border-color .25s, backdrop-filter .25s;
}
.hdr.scrolled {
  background: rgba(11,13,16,.72);
  backdrop-filter: blur(14px) saturate(1.4);
  -webkit-backdrop-filter: blur(14px) saturate(1.4);
  border-bottom-color: var(--line-2);
}
.hdr-in { display: flex; align-items: center; justify-content: space-between; height: 66px; }
.word { display: inline-flex; align-items: center; gap: 9px; font-family: var(--mono); font-weight: 500; font-size: 1.04rem; letter-spacing: .02em; }
.word-cat { color: var(--mint); display: inline-flex; }
.nav { display: flex; align-items: center; gap: 30px; }
.nav a { color: var(--fg-dim); font-size: .95rem; transition: color .15s; }
.nav a:hover { color: var(--fg); }
.nav .mini-dl { color: var(--mint); border: 1px solid var(--line); padding: 8px 16px; border-radius: 9px; font-weight: 600; }
.nav .mini-dl:hover { border-color: var(--mint); background: rgba(95,208,196,.08); }
@media (max-width: 780px) { .nav a:not(.mini-dl) { display: none; } }

/* ---------------- hero ---------------- */
.hero { position: relative; z-index: 1; padding: clamp(56px, 9vw, 118px) 0 clamp(40px, 6vw, 84px); }
.hero-in { display: grid; grid-template-columns: 1.02fr .98fr; gap: clamp(32px, 5vw, 76px); align-items: center; }
.hero-copy { max-width: 620px; }
.sub { font-size: 1.16rem; color: var(--fg-dim); margin: 26px 0 0; max-width: 30em; }
.cta-row { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.meta { font-family: var(--mono); font-size: .8rem; color: var(--muted); margin-top: 18px; letter-spacing: .01em; }

/* product device frame */
.hero-stage { position: relative; }
.device {
  background: var(--ink-2); border: 1px solid var(--line); border-radius: 16px; overflow: hidden;
  box-shadow: 0 40px 90px -30px rgba(0,0,0,.8), 0 0 0 1px rgba(255,255,255,.02);
  transform: perspective(1400px) rotateY(-9deg) rotateX(3deg);
  transform-origin: center; transition: transform .5s var(--ease); will-change: transform;
}
.hero-stage:hover .device { transform: perspective(1400px) rotateY(-4deg) rotateX(1.5deg); }
.dv-bar { display: flex; align-items: center; gap: 10px; padding: 11px 14px; border-bottom: 1px solid var(--line-2); background: var(--panel); }
.dv-dots { display: inline-flex; gap: 6px; }
.dv-dots i { width: 10px; height: 10px; border-radius: 50%; background: #333a44; display: block; }
.dv-title { font-family: var(--mono); font-size: .8rem; color: var(--fg-dim); }
.dv-live { margin-left: auto; font-family: var(--mono); font-size: .72rem; color: var(--amber); display: inline-flex; align-items: center; gap: 6px; }
.dv-live i { width: 6px; height: 6px; border-radius: 50%; background: var(--amber); animation: blip 1.6s ease-in-out infinite; }
@keyframes blip { 0%,100% { opacity: 1; } 50% { opacity: .3; } }
.dv-body { display: flex; min-height: 268px; }
.dv-rail { flex: 0 0 46px; display: flex; flex-direction: column; align-items: center; gap: 10px; padding: 14px 0; background: var(--panel); border-right: 1px solid var(--line-2); }
.dv-ic { width: 22px; height: 22px; border-radius: 7px; background: rgba(255,255,255,.06); }
.dv-ic.on { background: rgba(95,208,196,.18); }
.dv-chat { flex: 1 1 auto; padding: 16px; display: flex; flex-direction: column; gap: 10px; }
.bub { max-width: 88%; padding: 9px 13px; border-radius: 13px; font-size: .86rem; line-height: 1.5; }
.bub.user { align-self: flex-end; background: linear-gradient(135deg,#3fa79d,#4f7ec9); color: #fff; border-bottom-right-radius: 4px; }
.bub.momo { align-self: flex-start; background: var(--panel-2); border: 1px solid var(--line-2); border-bottom-left-radius: 4px; }
.bub.momo b { color: var(--mint); }
.log { display: flex; flex-direction: column; gap: 5px; padding: 4px 2px; }
.ll { font-family: var(--mono); font-size: .74rem; color: var(--muted); display: flex; align-items: center; gap: 7px; }
.ll .lc { color: var(--mint); }
.ll.ok { color: var(--fg-dim); }
.ll.ok .lc { color: var(--ok); }
.dv-taskbar { position: relative; height: 34px; background: rgba(0,0,0,.4); border-top: 1px solid var(--line-2); display: flex; align-items: center; padding: 0 12px; }
.dv-start { width: 16px; height: 16px; border-radius: 4px; background: rgba(255,255,255,.12); }
.dv-cat { position: absolute; right: 24px; bottom: 20px; }
.stage-note { font-family: var(--mono); font-size: .74rem; color: var(--muted); text-align: center; margin: 18px 0 0; }

/* ---------------- statement ---------------- */
.statement { position: relative; z-index: 1; padding: clamp(50px, 8vw, 104px) 0; border-top: 1px solid var(--line-2); border-bottom: 1px solid var(--line-2); }
.pull { font-family: var(--serif); font-weight: 500; font-size: clamp(1.6rem, 3.6vw, 2.7rem); line-height: 1.24; letter-spacing: -0.015em; max-width: 20em; margin: 0; color: var(--fg-dim); }
.pull em { font-style: italic; color: var(--fg); }
.pull-hi { color: var(--mint); font-style: italic; }

/* ---------------- generic section ---------------- */
.section { position: relative; z-index: 1; padding: clamp(64px, 9vw, 130px) 0; }
.head { max-width: 40em; margin: 0 0 clamp(38px, 5vw, 62px); }
.head-sub { color: var(--fg-dim); font-size: 1.08rem; margin: 18px 0 0; max-width: 34em; }

/* what it does — example rows */
.ex { display: flex; flex-direction: column; gap: 0; border-top: 1px solid var(--line-2); }
.ex-row { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(20px,4vw,60px); padding: clamp(24px,3.4vw,40px) 0; border-bottom: 1px solid var(--line-2); align-items: start; }
.tag { font-family: var(--mono); font-size: .68rem; letter-spacing: .13em; text-transform: uppercase; color: var(--muted); display: block; margin-bottom: 12px; }
.tag-out { color: var(--mint); }
.ex-say p { font-family: var(--serif); font-size: 1.28rem; line-height: 1.35; color: var(--fg); margin: 0; }
.ex-get p { color: var(--fg-dim); margin: 0 0 14px; }
.ex-get b { color: var(--fg); }
.chip { display: inline-flex; align-items: center; gap: 8px; font-family: var(--mono); font-size: .82rem; color: var(--mint); background: rgba(95,208,196,.09); border: 1px solid rgba(95,208,196,.24); padding: 6px 12px; border-radius: 9px; }
.chip i { width: 8px; height: 8px; border-radius: 2px; background: var(--mint); }
@media (max-width: 720px) { .ex-row { grid-template-columns: 1fr; gap: 18px; } }

.caps { list-style: none; margin: clamp(40px,5vw,64px) 0 0; padding: 0; display: grid; grid-template-columns: repeat(3,1fr); gap: 1px; background: var(--line-2); border: 1px solid var(--line-2); border-radius: 14px; overflow: hidden; }
.caps li { background: var(--ink-2); padding: 20px 22px 20px 44px; font-size: .96rem; color: var(--fg-dim); position: relative; }
.caps li::before { content: ""; position: absolute; left: 22px; top: 24px; width: 8px; height: 8px; border-radius: 2px; background: var(--mint); }
@media (max-width: 820px) { .caps { grid-template-columns: repeat(2,1fr); } }
@media (max-width: 520px) { .caps { grid-template-columns: 1fr; } }

/* ---------------- shows its work ---------------- */
.proof { border-top: 1px solid var(--line-2); background: var(--ink-2); }
.proof-in { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(34px,5vw,72px); align-items: center; }
.proof-copy .lead { color: var(--fg-dim); font-size: 1.08rem; margin: 20px 0 24px; }
.ticks { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 12px; }
.ticks li { position: relative; padding-left: 30px; color: var(--fg-dim); }
.ticks li::before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--mint); font-weight: 700; }
.proof-card { background: var(--ink); border: 1px solid var(--line); border-radius: 16px; padding: 18px; box-shadow: 0 30px 70px -30px rgba(0,0,0,.7); }
.pc-head { font-family: var(--mono); font-size: .76rem; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); display: flex; align-items: center; gap: 8px; margin-bottom: 14px; }
.pc-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--mint); }
.pc-log { list-style: none; margin: 0 0 16px; padding: 0; display: flex; flex-direction: column; gap: 9px; }
.pc-log li { font-family: var(--mono); font-size: .82rem; color: var(--fg-dim); display: flex; align-items: center; gap: 10px; }
.pc-log .pi { color: var(--mint); width: 14px; text-align: center; }
.pc-log li.good .pi { color: var(--ok); }
.pc-log .pt { margin-left: auto; font-size: .66rem; color: var(--mint); background: rgba(95,208,196,.1); padding: 1px 7px; border-radius: 6px; }
.pc-approve { border: 1px solid rgba(230,181,102,.4); border-radius: 12px; padding: 13px; background: rgba(230,181,102,.05); }
.pa-head { font-size: .82rem; font-weight: 600; color: var(--amber); margin-bottom: 9px; }
.pc-approve code { display: block; font-family: var(--mono); font-size: .74rem; color: var(--fg-dim); background: #0a0c0f; border: 1px solid var(--line-2); border-radius: 8px; padding: 8px 10px; margin-bottom: 11px; word-break: break-all; }
.pa-btns { display: flex; gap: 9px; }
.pa-allow, .pa-deny { flex: 1; text-align: center; font-size: .82rem; font-weight: 700; padding: 7px 0; border-radius: 8px; }
.pa-allow { background: var(--mint); color: var(--mint-ink); }
.pa-deny { background: rgba(255,255,255,.07); color: var(--fg); }
@media (max-width: 860px) { .proof-in { grid-template-columns: 1fr; } }

/* ---------------- steps ---------------- */
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3,1fr); gap: clamp(20px,3vw,40px); }
.step { border-top: 2px solid var(--line); padding-top: 22px; }
.step-n { font-family: var(--mono); font-size: .84rem; color: var(--mint); letter-spacing: .1em; }
.step h3 { margin: 14px 0 8px; }
.step p { color: var(--fg-dim); font-size: .98rem; margin: 0; }
.step code { font-family: var(--mono); font-size: .82em; background: rgba(95,208,196,.1); color: var(--mint); padding: 1px 6px; border-radius: 5px; }
.ilink { color: var(--mint); text-decoration: underline; text-underline-offset: 3px; text-decoration-color: rgba(95,208,196,.4); }
.how-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: clamp(40px,5vw,60px); }
@media (max-width: 760px) { .steps { grid-template-columns: 1fr; gap: 8px; } .step { border-top: none; border-left: 2px solid var(--line); padding: 4px 0 4px 20px; } }

/* ---------------- faq ---------------- */
.faq { border-top: 1px solid var(--line-2); }
.faq-in { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(30px,5vw,64px); align-items: start; }
.faq-list details { border-bottom: 1px solid var(--line-2); padding: 4px 0; }
.faq-list summary { list-style: none; cursor: pointer; padding: 18px 34px 18px 0; position: relative; font-family: var(--serif); font-size: 1.2rem; color: var(--fg); transition: color .15s; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; right: 2px; top: 15px; font-family: var(--sans); font-size: 1.5rem; color: var(--muted); transition: transform .2s var(--ease), color .15s; line-height: 1; }
.faq-list details[open] summary { color: var(--mint); }
.faq-list details[open] summary::after { transform: rotate(45deg); color: var(--mint); }
.faq-list summary:hover { color: var(--mint); }
.faq-list p { color: var(--fg-dim); margin: 0 0 18px; padding-right: 34px; font-size: 1rem; }
.faq-list em { color: var(--fg); font-style: italic; }
@media (max-width: 800px) { .faq-in { grid-template-columns: 1fr; } }

/* ---------------- end cta ---------------- */
.end { text-align: center; border-top: 1px solid var(--line-2); }
.end-in { max-width: 620px; margin: 0 auto; }
.end h2 { font-size: clamp(2.2rem, 5vw, 3.4rem); }
.end p { color: var(--fg-dim); margin: 16px 0 0; }
.end .cta-row { justify-content: center; margin-top: 30px; }
.join { display: flex; gap: 10px; justify-content: center; margin: 34px auto 0; max-width: 480px; flex-wrap: wrap; }
.field { flex: 1 1 240px; background: var(--ink-2); border: 1px solid var(--line); border-radius: 11px; padding: 13px 16px; color: var(--fg); font-family: var(--sans); font-size: .98rem; outline: none; transition: border-color .15s, box-shadow .15s; }
.field::placeholder { color: var(--muted); }
.field:focus { border-color: var(--mint); box-shadow: 0 0 0 3px rgba(95,208,196,.14); }
.form-status { min-height: 1.2em; margin: 14px 0 0; font-size: .9rem; color: var(--muted); text-align: center; }
.form-status.error { color: var(--danger); }
.form-status.success { color: var(--mint); }
.end-note { font-size: .88rem; color: var(--muted); margin-top: 10px; }
.end-note a, .form-status a { color: var(--mint); text-decoration: underline; text-underline-offset: 2px; }

/* ---------------- footer ---------------- */
.ft { border-top: 1px solid var(--line-2); padding: clamp(48px,6vw,72px) 0 32px; position: relative; z-index: 1; }
.ft-in { display: grid; grid-template-columns: 1.4fr 1fr; gap: 40px; }
.ft-brand p { color: var(--muted); max-width: 30em; margin: 16px 0 0; font-size: .96rem; }
.ft-links { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; }
.ft-links h4 { font-family: var(--mono); font-size: .72rem; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); margin: 0 0 14px; font-weight: 500; }
.ft-links a { display: block; color: var(--fg-dim); padding: 5px 0; font-size: .95rem; transition: color .15s; }
.ft-links a:hover { color: var(--mint); }
.ft-btm { display: flex; justify-content: space-between; gap: 14px; margin-top: 44px; padding-top: 24px; border-top: 1px solid var(--line-2); flex-wrap: wrap; }
.ft-btm p { color: var(--muted); font-size: .86rem; margin: 0; }
.maker { color: var(--fg-dim); text-decoration: underline; text-underline-offset: 2px; }
.maker:hover { color: var(--mint); }
.cred a { color: var(--fg-dim); text-decoration: underline; text-underline-offset: 2px; }
@media (max-width: 720px) { .ft-in { grid-template-columns: 1fr; gap: 28px; } }

/* ---------------- sprite (faces LEFT → flip to face right) ---------------- */
.sprite { display: block; width: calc(80px * var(--scale, 1)); height: calc(64px * var(--scale, 1)); background-repeat: no-repeat; image-rendering: pixelated; transform: scaleX(-1); }
.sprite-walk { background-image: url(assets/cat/walk.png); background-size: calc(960px * var(--scale,1)) calc(64px * var(--scale,1)); animation: sp-walk .9s steps(12) infinite; }
@keyframes sp-walk { to { background-position-x: calc(-960px * var(--scale,1)); } }
.dv-cat .sprite { --scale: .58; }

/* ---------------- reveal on scroll ---------------- */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
.reveal[data-d="1"] { transition-delay: .08s; }
.reveal[data-d="2"] { transition-delay: .16s; }
.reveal[data-d="3"] { transition-delay: .24s; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .device { transform: none; }
  .sprite { animation: none; }
  .dv-live i { animation: none; }
}
@media (max-width: 900px) {
  .hero-in { grid-template-columns: 1fr; }
  .hero-stage { max-width: 460px; }
  .device { transform: none; }
}