:root{
  --paper-deep:#DCD0AE;
  --paper:#F2EAD3;
  --paper-edge:#E7DBBC;
  --ink:#2A2722;
  --ink-soft:#6B6354;
  --stamp:#AE3326;
  --carbon:#38456B;
  --line:#C9BC95;
  --radius:14px;
  --wrap:1080px;
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  background-color:var(--paper-deep);
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix type='matrix' values='0 0 0 0 0  0 0 0 0 0  0 0 0 0 0  0 0 0 0.045 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
  color:var(--ink);
  font-family:'Noto Sans SC', sans-serif;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
.mono{ font-family:'JetBrains Mono', monospace; }
.wrap{ max-width:var(--wrap); margin:0 auto; padding:0 24px; }
a{ color:var(--carbon); text-decoration:none; }
a:hover{ text-decoration:underline; }
:focus-visible{ outline:2px solid var(--carbon); outline-offset:3px; border-radius:4px; }
h1,h2,h3{ font-family:'Noto Sans SC', sans-serif; font-weight:900; margin:0; color:var(--ink); }
p{ margin:0; }
::selection{ background:var(--stamp); color:var(--paper); }

.brand__name{ font-family:'JetBrains Mono', monospace; font-weight:700; font-size:1.15rem; letter-spacing:-.02em; }

.eyebrow{
  display:inline-flex; align-items:center; gap:8px;
  font-family:'JetBrains Mono', monospace;
  font-size:.72rem; letter-spacing:.12em; text-transform:uppercase;
  color:var(--ink-soft);
}
.eyebrow::before{ content:""; width:6px; height:6px; border-radius:50%; background:var(--stamp); display:inline-block; }

.btn{
  font-family:'JetBrains Mono', monospace; font-size:.84rem; font-weight:500;
  padding:9px 16px; border-radius:8px; border:1.5px solid var(--ink);
  display:inline-flex; align-items:center; gap:6px; white-space:nowrap;
  transition:transform .15s ease, box-shadow .15s ease;
}
.btn:hover{ transform:translateY(-1px); text-decoration:none; box-shadow:2px 3px 0 var(--ink); }
.btn--ghost{ border-color:var(--line); color:var(--ink); }
.btn--primary{ background:var(--ink); color:var(--paper); }
.btn--primary:hover{ box-shadow:2px 3px 0 var(--stamp); }

/* ---------- HERO ---------- */
.hero{ min-height:100vh; display:flex; align-items:center; padding:40px 0; }
.hero .wrap{ display:grid; grid-template-columns:1.1fr 1fr; gap:56px; align-items:center; }
.hero h1{ font-size:clamp(2.4rem, 4.8vw, 3.6rem); line-height:1.15; margin:10px 0 16px; letter-spacing:-.02em; }
.hero h1 .accent{ color:var(--stamp); }
.hero__sub{ font-size:1.02rem; color:var(--ink-soft); max-width:48ch; line-height:1.7; }

.hero-badge{
  display:inline-flex; align-items:center; gap:8px;
  background:var(--paper); border:1.5px solid var(--line); border-radius:999px;
  padding:4px 16px 4px 10px; font-size:.76rem; color:var(--ink-soft);
  font-family:'JetBrains Mono', monospace;
}
.hero-badge-dot{ width:7px; height:7px; border-radius:50%; background:var(--stamp); display:inline-block; }

.redis-line{
  font-size:1.08rem; font-weight:700; margin:18px 0 22px;
  color:var(--ink-soft);
}
.redis-line strong{ color:var(--ink); }
.redis-line span{
  background:linear-gradient(135deg, var(--stamp), #c084fc);
  -webkit-background-clip:text; -webkit-text-fill-color:transparent;
  background-clip:text;
}

.pull-quote{
  margin:22px 0; padding:4px 0 4px 16px; border-left:3px solid var(--stamp);
  font-family:'JetBrains Mono', monospace; font-size:.95rem; color:var(--ink);
}
.hero__cta{ display:flex; gap:14px; margin:26px 0 18px; flex-wrap:wrap; }
.hero__stats{ font-family:'JetBrains Mono', monospace; font-size:.78rem; color:var(--ink-soft); letter-spacing:.02em; }

/* ---------- TICKET ---------- */
.ticket{
  position:relative; display:flex;
  background:var(--paper); border-radius:var(--radius);
  box-shadow:0 1px 0 var(--paper-edge) inset, 6px 10px 0 rgba(42,39,34,.12);
  overflow:hidden;
}
.ticket::before, .ticket::after{
  content:""; position:absolute; left:64px; width:20px; height:20px;
  background:var(--paper-deep); border-radius:50%; transform:translateX(-50%); z-index:2;
}
.ticket::before{ top:-10px; }
.ticket::after{ bottom:-10px; }
.ticket__stub{
  width:64px; flex-shrink:0; border-right:2px dashed var(--line);
  display:flex; align-items:center; justify-content:center; padding:18px 0;
}
.ticket__stub span{
  writing-mode:vertical-rl; text-orientation:mixed;
  font-family:'JetBrains Mono', monospace; font-size:.72rem;
  letter-spacing:.18em; color:var(--ink-soft);
}
.ticket__main{ flex:1; padding:22px 22px 26px; min-width:0; }
.ticket__head{ display:flex; justify-content:space-between; align-items:baseline; margin-bottom:14px; }
.ticket__title{ font-family:'JetBrains Mono', monospace; font-size:.78rem; letter-spacing:.08em; color:var(--ink-soft); }
.ticket__serial{ font-family:'JetBrains Mono', monospace; font-weight:700; font-size:.86rem; }
.ticket__rule{ border-top:1px dotted var(--line); margin:0 0 16px; }
.ticket__fields{ display:grid; grid-template-columns:1fr 1fr; gap:14px 18px; }
.field{ opacity:0; transform:translateY(6px); animation:fieldIn .45s ease forwards; }
.field:nth-child(1){ animation-delay:.05s; }
.field:nth-child(2){ animation-delay:.12s; }
.field:nth-child(3){ animation-delay:.19s; }
.field:nth-child(4){ animation-delay:.26s; }
.field:nth-child(5){ animation-delay:.33s; }
.field:nth-child(6){ animation-delay:.4s; }
@keyframes fieldIn{ to{ opacity:1; transform:translateY(0); } }
.field__label{ display:block; font-family:'JetBrains Mono', monospace; font-size:.66rem; letter-spacing:.1em; color:var(--ink-soft); text-transform:uppercase; margin-bottom:3px; }
.field__value{ font-family:'JetBrains Mono', monospace; font-size:.86rem; font-weight:700; word-break:break-all; }
.ticket__bars{ display:flex; align-items:flex-end; gap:2px; margin-top:18px; height:22px; }
.ticket__bars span{ background:var(--ink); display:block; opacity:.78; }
.ticket__barcap{ margin-top:6px; font-family:'JetBrains Mono', monospace; font-size:.64rem; letter-spacing:.1em; color:var(--ink-soft); }
.stamp{
  position:absolute; right:14px; bottom:10px; width:78px; height:78px;
  border:2.5px solid var(--stamp); border-radius:50%;
  display:flex; flex-direction:column; align-items:center; justify-content:center;
  color:var(--stamp); transform:rotate(-13deg) scale(.6); opacity:0;
  animation:stampIn .35s cubic-bezier(.3,1.6,.5,1) .75s forwards;
  mix-blend-mode:multiply;
}
.stamp::before{ content:""; position:absolute; inset:6px; border:1px solid var(--stamp); border-radius:50%; opacity:.6; }
.stamp b{ font-family:'JetBrains Mono', monospace; font-size:.64rem; letter-spacing:.06em; }
.stamp span{ font-family:'JetBrains Mono', monospace; font-size:.58rem; letter-spacing:.04em; }
@keyframes stampIn{ to{ transform:rotate(-13deg) scale(1); opacity:.92; } }

/* ---------- SECTION SHELL ---------- */
section.block{ padding:64px 0; border-top:1px solid var(--line); }
.block__head{ max-width:640px; margin-bottom:38px; }
.block__head h2{ font-size:clamp(1.5rem,2.6vw,2rem); margin:10px 0 12px; }
.block__head p{ color:var(--ink-soft); font-size:.98rem; }
.reveal{ opacity:0; transform:translateY(14px); transition:opacity .5s ease, transform .5s ease; }
.reveal.is-visible{ opacity:1; transform:translateY(0); }

/* ---------- WHY CARDS ---------- */
.why-cards{
  display:grid; grid-template-columns:repeat(auto-fit,minmax(240px,1fr)); gap:18px;
}
.why-card{
  background:var(--paper); border:1.5px solid var(--line); border-radius:var(--radius);
  padding:24px 22px; position:relative;
}
.why-card__label{
  font-family:'JetBrains Mono', monospace; font-size:.7rem; letter-spacing:.12em; text-transform:uppercase;
  color:var(--stamp); font-weight:700; margin-bottom:6px;
}
.why-card h4{ font-size:1rem; margin:0 0 8px; font-weight:900; }
.why-card p{ margin:0; font-size:.85rem; color:var(--ink-soft); line-height:1.7; }

/* ---------- ARCHITECTURE ---------- */
.arch-flow{ display:flex; align-items:stretch; gap:0; flex-wrap:wrap; }
.arch-node{
  background:var(--paper); border:1.5px solid var(--ink); border-radius:10px;
  padding:16px 18px; min-width:150px; flex:1;
  display:flex; flex-direction:column; gap:4px;
}
.arch-node__label{ font-family:'JetBrains Mono', monospace; font-weight:700; font-size:.95rem; }
.arch-node__sub{ font-size:.78rem; color:var(--ink-soft); }
.arch-node--broker{ border-color:var(--stamp); box-shadow:3px 4px 0 var(--stamp); }
.arch-arrow{ display:flex; align-items:center; justify-content:center; width:46px; font-size:1.3rem; color:var(--ink-soft); flex-shrink:0; }
.arch-arrow--dashed{ color:var(--stamp); font-weight:700; }
.arch-caption{ margin-top:18px; font-size:.85rem; color:var(--ink-soft); max-width:62ch; }
.arch-caption b{ color:var(--ink); }
.arch-note{ margin-top:14px; font-size:.95rem; color:var(--ink-soft); max-width:68ch; }

@media (max-width:760px){
  .arch-flow{ flex-direction:column; }
  .arch-arrow{ width:100%; height:30px; transform:rotate(90deg); }
}

/* ---------- ANATOMY ---------- */
.anatomy-path{
  font-family:'JetBrains Mono', monospace; font-size:clamp(.78rem,2.4vw,1.05rem);
  background:var(--ink); color:var(--paper); border-radius:10px;
  padding:18px 16px; overflow-x:auto; white-space:nowrap;
}
.anatomy-path span{ padding:1px 2px; border-radius:3px; }
.anatomy-path .seg0{ background:var(--ink-soft); }
.anatomy-path .seg1{ background:#4a5a82; }
.anatomy-path .seg2{ background:#6b5a2f; }
.anatomy-path .seg3{ background:#3f6b52; }
.anatomy-path .seg4{ background:#8a3a3a; }
.anatomy-legend{ display:grid; grid-template-columns:repeat(auto-fit,minmax(220px,1fr)); gap:14px; margin-top:24px; }
.legend-item{ display:flex; gap:10px; align-items:flex-start; }
.legend-dot{ width:10px; height:10px; border-radius:3px; margin-top:5px; flex-shrink:0; }
.legend-item h4{ margin:0 0 2px; font-family:'JetBrains Mono', monospace; font-size:.86rem; }
.legend-item p{ font-size:.84rem; color:var(--ink-soft); margin:0; }

/* ---------- API ---------- */
.api-row{
  display:flex; align-items:baseline; gap:16px; padding:14px 0;
  border-bottom:1px dotted var(--line); flex-wrap:wrap;
}
.api-row:last-child{ border-bottom:none; }
.method{
  font-family:'JetBrains Mono', monospace; font-size:.74rem; font-weight:700;
  padding:3px 9px; border-radius:5px; flex-shrink:0; letter-spacing:.04em;
}
.method--post{ background:#3f6b52; color:#eef6ef; }
.method--get{ background:var(--carbon); color:#eef0f6; }
.api-path{ font-family:'JetBrains Mono', monospace; font-size:.92rem; font-weight:700; flex-shrink:0; }
.api-desc{ color:var(--ink-soft); font-size:.88rem; }

/* ---------- SECURITY ---------- */
.sec-list{ display:grid; grid-template-columns:repeat(auto-fit,minmax(280px,1fr)); gap:16px; }
.sec-item{ display:flex; gap:12px; align-items:flex-start; }
.sec-check{
  flex-shrink:0; width:26px; height:26px; border-radius:50%; border:2px solid var(--stamp);
  color:var(--stamp); display:flex; align-items:center; justify-content:center;
  font-size:.8rem; font-weight:700; margin-top:1px;
}
.sec-item:nth-child(odd) .sec-check{ transform:rotate(-6deg); }
.sec-item:nth-child(even) .sec-check{ transform:rotate(5deg); }
.sec-item h4{ margin:0 0 3px; font-size:.96rem; }
.sec-item p{ margin:0; font-size:.85rem; color:var(--ink-soft); }

/* ---------- STORAGE CHIPS ---------- */
.chips{ display:flex; flex-wrap:wrap; gap:12px; }
.chip{
  font-family:'JetBrains Mono', monospace; font-size:.82rem;
  background:var(--paper); border:1.5px solid var(--ink); border-radius:7px;
  padding:8px 14px 8px 22px; position:relative;
}
.chip::before{
  content:""; position:absolute; left:9px; top:50%; width:6px; height:6px;
  border-radius:50%; border:1.5px solid var(--ink); transform:translateY(-50%);
  background:var(--paper-deep);
}

/* ---------- FAQ ---------- */
.faq-tabs{
  display:flex; gap:0; border-bottom:2px solid var(--line); margin-bottom:0; flex-wrap:nowrap;
  overflow-x:auto; scrollbar-width:none;
}
.faq-tabs::-webkit-scrollbar{ display:none; }
.faq-tab{
  padding:10px 20px; font-size:.85rem; font-weight:700;
  color:var(--ink-soft); cursor:pointer; white-space:nowrap;
  border-bottom:2px solid transparent; margin-bottom:-2px; transition:.2s;
  font-family:'Noto Sans SC', sans-serif;
  background:none; border:none;
}
.faq-tab:hover{ color:var(--ink); }
.faq-tab.active{ color:var(--stamp); border-bottom-color:var(--stamp); }
.faq-content{
  background:var(--paper); border:1.5px solid var(--line); border-top:none;
  border-radius:0 0 var(--radius) var(--radius); padding:28px 30px; display:none;
}
.faq-content.active{ display:block; }
.faq-content h4{ font-size:.98rem; margin-bottom:8px; color:var(--ink); font-weight:900; }
.faq-content p{ font-size:.86rem; color:var(--ink-soft); line-height:1.8; margin-bottom:12px; }
.faq-content p:last-child{ margin-bottom:0; }
.faq-content strong{ color:var(--ink); }
.faq-content ul{ margin:8px 0 12px 18px; padding:0; }
.faq-content li{ font-size:.86rem; color:var(--ink-soft); line-height:1.8; margin-bottom:4px; }
.faq-summary{
  margin-top:16px; padding:12px 16px;
  background:var(--paper-edge); border-radius:8px; border-left:3px solid var(--stamp);
  font-size:.86rem;
}

/* ---------- QUICKSTART ---------- */
.term{
  background:var(--ink); color:var(--paper); border-radius:10px;
  padding:20px 22px; font-family:'JetBrains Mono', monospace; font-size:.88rem;
  line-height:2;
}
.term .p{ color:var(--stamp); }
.term .c{ color:#9aa6c4; }

/* ---------- QUICKSTART STEPS ---------- */
.qs-grid{ display:grid; grid-template-columns:1fr 50vw; gap:32px; align-items:start; }
.qs-left{ padding-left:calc((100vw - var(--wrap)) / 2 + 24px); }
@media(max-width:1080px){ .qs-left{ padding-left:24px; } }
@media(max-width:720px){ .qs-grid{ grid-template-columns:1fr; } .qs-left{ padding-left:0; } }
.step{ display:flex; gap:14px; margin-bottom:20px; align-items:flex-start; }
.step:last-child{ margin-bottom:0; }
.step-num{
  flex-shrink:0; width:28px; height:28px; border-radius:50%;
  background:var(--stamp); color:var(--paper); font-weight:800; font-size:.8rem;
  font-family:'JetBrains Mono', monospace;
  display:flex; align-items:center; justify-content:center;
}
.step p{ color:var(--ink-soft); font-size:.9rem; line-height:1.6; }
.step code{
  background:var(--paper-edge); padding:2px 8px; border-radius:4px;
  font-family:'JetBrains Mono', monospace; font-size:.82rem; color:var(--ink);
}

/* ---------- FOOTER ---------- */
footer{ padding:40px 0 60px; }
footer .wrap{ display:flex; justify-content:space-between; align-items:center; gap:16px; flex-wrap:wrap; }
.footer__license{
  font-family:'JetBrains Mono', monospace; font-size:.72rem; color:var(--stamp);
  border:1.5px solid var(--stamp); border-radius:6px; padding:4px 9px; transform:rotate(-3deg);
  display:inline-block;
}

@media (max-width:880px){
  .hero .wrap{ grid-template-columns:1fr; }
  .hero{ min-height:auto; padding:60px 0; }
}

/* ---------- AI SKILL TOOLTIP ---------- */
.ai-skill-btn{
  position:relative; display:inline-block;
}
.ai-tooltip{
  position:absolute; bottom:calc(100% + 14px); left:0;
  transform:translateY(4px);
  width:50vw; max-width:90vw;
  background:var(--ink); color:var(--paper);
  border-radius:10px; padding:18px 20px;
  font-size:.8rem; line-height:1.65;
  opacity:0; visibility:hidden;
  transition:opacity .2s ease, transform .2s ease, visibility .2s;
  pointer-events:none; z-index:20;
  box-shadow:0 8px 24px rgba(0,0,0,.3);
}
.ai-skill-btn:hover .ai-tooltip{
  opacity:1; visibility:visible;
  transform:translateY(0);
  pointer-events:auto;
}
.ai-tooltip__arrow{
  position:absolute; bottom:-6px; left:24px;
  transform:rotate(45deg);
  width:12px; height:12px;
  background:var(--ink);
}
.ai-tooltip__title{
  font-family:'JetBrains Mono', monospace;
  font-size:.75rem; letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--stamp); font-weight:700;
  margin-bottom:8px;
}
.ai-tooltip__content p{
  font-size:.82rem; color:#c8c4b8; margin:0 0 12px; line-height:1.7;
}
.ai-tooltip__steps{
  display:flex; flex-direction:column; gap:8px;
  margin-bottom:12px;
}
.ai-tooltip__step{
  font-size:.78rem; color:#b0ab9e; line-height:1.6;
  display:flex; gap:8px; align-items:flex-start;
}
.ai-step-num{
  flex-shrink:0; width:18px; height:18px; border-radius:50%;
  background:var(--stamp); color:var(--paper);
  font-size:.64rem; font-weight:700; font-family:'JetBrains Mono', monospace;
  display:inline-flex; align-items:center; justify-content:center; margin-top:2px;
}
.ai-tooltip__step .ai-code{
  display:inline-block; background:rgba(255,255,255,.08); color:#d4d0c4;
  padding:1px 6px; border-radius:4px;
  font-family:'JetBrains Mono', monospace; font-size:.74rem;
}
.ai-code{
  background:rgba(255,255,255,.08); color:#d4d0c4;
  padding:1px 6px; border-radius:4px;
  font-family:'JetBrains Mono', monospace; font-size:.76rem;
}
.ai-tooltip__link{
  display:inline-flex; align-items:center; gap:4px;
  font-family:'JetBrains Mono', monospace; font-size:.74rem;
  color:var(--stamp); font-weight:600;
  transition:gap .2s;
}
.ai-tooltip__link:hover{ gap:8px; text-decoration:none; color:#d64d3a; }

@media (max-width:640px){
  .ai-tooltip{ width:88vw; left:auto; right:0; transform:translateY(4px); }
  .ai-skill-btn:hover .ai-tooltip{ transform:translateY(0); }
  .ai-tooltip__arrow{ left:auto; right:24px; }
}

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{ animation:none !important; transition:none !important; }
  .field, .stamp{ opacity:1 !important; transform:none !important; }
  html{ scroll-behavior:auto; }
}