/* ==========================================================================
   YungsAPI Mod — Main Stylesheet
   Design seed: S01 Clean SaaS — accent palette from the YungsAPI icon
   Edit the tokens in :root to restyle the whole website.
   ========================================================================== */

/* ---------- Fonts (bundled locally, work offline) ---------- */
@font-face { font-family: "Poppins"; src: url("../fonts/poppins-regular.woff2") format("woff2"); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: "Poppins"; src: url("../fonts/poppins-medium.woff2") format("woff2"); font-weight: 500; font-style: normal; font-display: swap; }
@font-face { font-family: "Poppins"; src: url("../fonts/poppins-bold.woff2") format("woff2"); font-weight: 700; font-style: normal; font-display: swap; }

/* ---------- Design tokens ---------- */
:root {
  --ink: #1B1A1F;
  --ink-2: #4E4A4F;
  --ink-3: #726C70;
  --paper: #FFFFFF;
  --mist: #FBF6EE;
  --line: #EFE4D6;
  --moss: #BC3F05;
  --moss-dark: #8E2A04;
  --moss-soft: #FFEEDF;
  --lapis: #A8300F;
  --lapis-soft: #FDECE6;
  --gold: #F5BF3F;
  --gold-soft: #FFF6D6;
  --danger: #D1495B;
  --danger-soft: #FDECEF;

  --grad-soft: linear-gradient(135deg, #FFF8E0 0%, #FFF1E4 55%, #FDEAE3 100%);
  --grad-brand: linear-gradient(135deg, #D65623 0%, var(--moss) 45%, #5D190F 100%);

  --r-panel: 32px;
  --r-card: 20px;
  --r-small: 12px;
  --r-pill: 999px;

  --shadow-sm: 0 1px 2px rgba(27, 26, 31, .06), 0 2px 8px rgba(27, 26, 31, .05);
  --shadow-md: 0 10px 30px -12px rgba(27, 26, 31, .18);
  --shadow-lg: 0 30px 60px -24px rgba(27, 26, 31, .28);

  --container: 1180px;
  --header-h: 76px;
  --ease: cubic-bezier(.2, .7, .2, 1);
  --font: "Poppins", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 16px); -webkit-text-size-adjust: 100%; }
body { margin: 0; font-family: var(--font); font-size: 1rem; line-height: 1.7; color: var(--ink-2); background: var(--paper); overflow-x: hidden; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--lapis); text-decoration: none; transition: color .2s var(--ease); }
a:hover { color: var(--moss-dark); }
h1, h2, h3, h4 { color: var(--ink); line-height: 1.2; margin: 0 0 .6em; font-weight: 700; letter-spacing: -.015em; }
h1 { font-size: clamp(2.2rem, 4.6vw, 3.6rem); letter-spacing: -.03em; }
h2 { font-size: clamp(1.7rem, 3vw, 2.4rem); letter-spacing: -.025em; }
h3 { font-size: 1.18rem; font-weight: 600; }
p { margin: 0 0 1.1em; }
ul, ol { margin: 0 0 1.1em; padding-left: 1.3em; }
:focus-visible { outline: 3px solid var(--lapis); outline-offset: 3px; border-radius: 6px; }
::selection { background: var(--moss-soft); color: var(--ink); }

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.skip-link { position: absolute; left: -999px; top: 8px; z-index: 200; background: var(--ink); color: #fff; padding: 10px 16px; border-radius: var(--r-small); }
.skip-link:focus { left: 12px; color: #fff; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ---------- Buttons ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: .55em; font-family: inherit; font-weight: 600; font-size: .98rem; line-height: 1; padding: 15px 26px; border-radius: var(--r-pill); border: 1.5px solid transparent; cursor: pointer; transition: transform .25s var(--ease), box-shadow .25s var(--ease), background-color .25s var(--ease), color .25s var(--ease), border-color .25s var(--ease); white-space: nowrap; }
.btn svg { width: 18px; height: 18px; flex: none; }
.btn-primary { background: var(--moss); color: #fff; box-shadow: 0 10px 22px -10px rgba(188, 63, 5, .7); }
.btn-primary:hover { background: var(--moss-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 16px 28px -12px rgba(188, 63, 5, .75); }
.btn-outline { background: var(--paper); color: var(--ink); border-color: var(--line); }
.btn-outline:hover { border-color: var(--ink); color: var(--ink); transform: translateY(-2px); }
.btn-light { background: #fff; color: var(--ink); }
.btn-light:hover { color: var(--moss-dark); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn-lg { padding: 18px 32px; font-size: 1.05rem; }
.btn-sm { padding: 11px 18px; font-size: .9rem; }
.text-link { font-weight: 600; color: var(--lapis); display: inline-flex; gap: .4em; align-items: center; }
.text-link:hover { color: var(--moss-dark); }

/* ---------- Header ---------- */
.site-header { position: sticky; top: 0; z-index: 100; background: rgba(255, 255, 255, .86); backdrop-filter: saturate(1.4) blur(14px); -webkit-backdrop-filter: saturate(1.4) blur(14px); border-bottom: 1px solid transparent; transition: box-shadow .3s var(--ease), border-color .3s var(--ease); }
.site-header.is-scrolled { box-shadow: 0 8px 24px -16px rgba(27, 26, 31, .35); border-color: var(--line); }
.header-inner { height: var(--header-h); display: flex; align-items: center; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 12px; color: var(--ink); font-weight: 700; font-size: 1.12rem; letter-spacing: -.02em; }
.brand img { width: 40px; height: 40px; border-radius: 11px; }
.brand:hover { color: var(--ink); }
.main-nav { margin-left: auto; }
.nav-list { display: flex; align-items: center; gap: 4px; list-style: none; margin: 0; padding: 0; }
.nav-list a { display: block; padding: 9px 13px; border-radius: var(--r-pill); font-size: .93rem; font-weight: 500; color: var(--ink-2); transition: background-color .2s var(--ease), color .2s var(--ease); }
.nav-list a:hover { color: var(--ink); background: var(--mist); }
.nav-list a.is-active { color: var(--moss-dark); background: var(--moss-soft); }
.header-cta { margin-left: 8px; }
.nav-toggle { display: none; margin-left: auto; width: 46px; height: 46px; border-radius: 14px; border: 1px solid var(--line); background: #fff; cursor: pointer; align-items: center; justify-content: center; }
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after { display: block; width: 20px; height: 2px; background: var(--ink); border-radius: 2px; position: relative; transition: transform .3s var(--ease), background-color .2s; }
.nav-toggle span::before, .nav-toggle span::after { content: ""; position: absolute; left: 0; }
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }
.nav-toggle[aria-expanded="true"] span { background: transparent; }
.nav-toggle[aria-expanded="true"] span::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span::after { transform: translateY(-6px) rotate(-45deg); }

/* ---------- Sections ---------- */
.section { padding: 104px 0; position: relative; }
.section-mist { background: var(--mist); }
.section-head { max-width: 680px; margin: 0 0 52px; }
.section-head.center { text-align: center; margin-left: auto; margin-right: auto; }
.section-head p { font-size: 1.06rem; }
.kicker { display: inline-flex; align-items: center; gap: 8px; font-size: .86rem; font-weight: 600; color: var(--moss-dark); background: var(--moss-soft); padding: 6px 14px; border-radius: var(--r-pill); margin-bottom: 18px; }
.kicker::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--moss); }

/* ---------- Hero (split) ---------- */
.hero { position: relative; padding: 72px 0 96px; overflow: hidden; background: var(--grad-soft); }
.hero::before, .hero::after { content: ""; position: absolute; border-radius: 50%; filter: blur(60px); opacity: .55; pointer-events: none; }
.hero::before { width: 460px; height: 460px; background: #FDE48A; top: -160px; left: -140px; animation: drift 16s ease-in-out infinite alternate; }
.hero::after { width: 520px; height: 520px; background: #FFD2BC; bottom: -220px; right: -120px; animation: drift 18s ease-in-out infinite alternate-reverse; }
.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: 1.02fr .98fr; gap: 48px; align-items: center; }
.hero-copy h1 { font-size: clamp(2.1rem, 4vw, 3.2rem); }
.hero-copy .lead { font-size: 1.14rem; max-width: 540px; color: var(--ink-2); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin: 30px 0 34px; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 10px; list-style: none; padding: 0; margin: 0; }
.hero-meta li { display: inline-flex; align-items: center; gap: 8px; background: rgba(255, 255, 255, .8); border: 1px solid var(--line); padding: 8px 14px; border-radius: var(--r-pill); font-size: .88rem; font-weight: 500; color: var(--ink); }
.hero-meta svg { width: 16px; height: 16px; color: var(--moss); }
.hero-visual { position: relative; }
.hero-visual .hero-img { width: 100%; animation: float 7s ease-in-out infinite; }
.hero-chip { position: absolute; display: flex; align-items: center; gap: 10px; background: #fff; border-radius: 16px; padding: 12px 16px; box-shadow: var(--shadow-md); font-size: .9rem; font-weight: 600; color: var(--ink); }
.hero-chip small { display: block; font-weight: 400; color: var(--ink-3); font-size: .78rem; }
.hero-chip i { width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center; font-style: normal; color: #fff; font-size: .82rem; }
.hero-chip.c1 { top: 10%; left: -2%; animation: float 6s ease-in-out infinite .4s; }
.hero-chip.c2 { top: 44%; right: -3%; animation: float 7s ease-in-out infinite 1.2s; }
.hero-chip.c3 { bottom: 8%; left: 10%; animation: float 6.5s ease-in-out infinite .8s; }
.bg-moss { background: var(--moss); }
.bg-lapis { background: var(--lapis); }
.bg-gold { background: var(--gold); }

/* ---------- About (image left, text right) ---------- */
.about-grid { display: grid; grid-template-columns: .95fr 1.05fr; gap: 64px; align-items: center; }
.about-media { position: relative; }
.about-media img { border-radius: var(--r-panel); box-shadow: var(--shadow-lg); }
.about-badge { position: absolute; right: -18px; bottom: 36px; background: var(--ink); color: #fff; border-radius: var(--r-card); padding: 18px 20px; max-width: 220px; box-shadow: var(--shadow-lg); font-size: .9rem; line-height: 1.45; }
.about-badge strong { display: block; font-size: 1.5rem; color: var(--gold); }
.check-list { list-style: none; padding: 0; margin: 24px 0 0; display: grid; gap: 14px; }
.check-list li { position: relative; padding-left: 36px; color: var(--ink-2); }
.check-list li::before { content: ""; position: absolute; left: 0; top: 3px; width: 24px; height: 24px; border-radius: 8px; background: var(--moss-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%232F9E6B' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12l5 5L20 7'/%3E%3C/svg%3E") center/14px no-repeat; }
.check-list strong { color: var(--ink); }

/* ---------- Features (3-col cards) ---------- */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.feature-card { background: #fff; border: 1px solid var(--line); border-radius: var(--r-card); padding: 30px 28px; transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease); }
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: transparent; }
.feature-card p { margin: 0; font-size: .96rem; }
.icon-tile { width: 52px; height: 52px; border-radius: 16px; display: grid; place-items: center; margin-bottom: 20px; }
.icon-tile svg { width: 26px; height: 26px; }
.tile-moss { background: var(--moss-soft); color: var(--moss-dark); }
.tile-lapis { background: var(--lapis-soft); color: var(--lapis); }
.tile-gold { background: var(--gold-soft); color: #A35A0A; }
.feature-card.is-wide { grid-column: span 2; display: grid; grid-template-columns: auto 1fr; gap: 22px; align-items: start; background: var(--grad-soft); border-color: transparent; }
.feature-card.is-wide .icon-tile { margin: 0; background: #fff; }

/* ---------- How it works (horizontal timeline) ---------- */
.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; position: relative; counter-reset: step; }
.steps::before { content: ""; position: absolute; top: 28px; left: 12%; right: 12%; height: 2px; background: repeating-linear-gradient(90deg, var(--line) 0 10px, transparent 10px 18px); }
.step { position: relative; text-align: center; padding: 0 12px; }
.step-num { width: 58px; height: 58px; margin: 0 auto 22px; border-radius: 50%; background: #fff; border: 2px solid var(--moss); color: var(--moss-dark); display: grid; place-items: center; font-weight: 700; font-size: 1.2rem; position: relative; z-index: 1; box-shadow: 0 0 0 8px var(--mist); }
.step p { max-width: 320px; margin: 0 auto; font-size: .96rem; }

/* ---------- Compatibility ---------- */
.compat-wrap { background: #fff; border: 1px solid var(--line); border-radius: var(--r-panel); overflow: hidden; box-shadow: var(--shadow-sm); }
.table-scroll { overflow-x: auto; }
.compat-table { width: 100%; border-collapse: collapse; min-width: 620px; font-size: .95rem; }
.compat-table th, .compat-table td { padding: 18px 22px; text-align: left; border-bottom: 1px solid var(--line); }
.compat-table thead th { background: var(--mist); color: var(--ink); font-weight: 600; font-size: .9rem; }
.compat-table tbody th { color: var(--ink); font-weight: 600; }
.compat-table tr:last-child td, .compat-table tr:last-child th { border-bottom: 0; }
.pill { display: inline-flex; align-items: center; gap: 6px; padding: 5px 12px; border-radius: var(--r-pill); font-size: .82rem; font-weight: 600; }
.pill-yes { background: var(--moss-soft); color: var(--moss-dark); }
.pill-check { background: var(--gold-soft); color: #8A4A0C; }
.pill-no { background: var(--mist); color: var(--ink-3); }
.compat-note { padding: 18px 22px; background: var(--lapis-soft); color: var(--ink); font-size: .92rem; margin: 0; }

/* ---------- Use cases ---------- */
.usecase-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.usecase { background: #fff; border-radius: var(--r-card); padding: 26px 24px; border: 1px solid var(--line); position: relative; overflow: hidden; transition: transform .3s var(--ease), box-shadow .3s var(--ease); }
.usecase::after { content: ""; position: absolute; left: 0; top: 0; height: 4px; width: 100%; background: var(--grad-brand); transform: scaleX(.18); transform-origin: left; transition: transform .45s var(--ease); }
.usecase:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.usecase:hover::after { transform: scaleX(1); }
.usecase p { margin: 0; font-size: .94rem; }

/* ---------- Installation ---------- */
.install-grid { display: grid; grid-template-columns: 1.3fr .7fr; gap: 40px; align-items: start; }
.install-steps { list-style: none; padding: 0; margin: 0; display: grid; gap: 16px; counter-reset: ins; }
.install-steps li { counter-increment: ins; display: grid; grid-template-columns: 48px 1fr; gap: 18px; background: #fff; border: 1px solid var(--line); border-radius: var(--r-card); padding: 22px 24px; }
.install-steps li::before { content: counter(ins); width: 48px; height: 48px; border-radius: 14px; background: var(--grad-brand); color: #fff; font-weight: 700; display: grid; place-items: center; }
.install-steps h3 { margin-bottom: .3em; font-size: 1.06rem; }
.install-steps p { margin: 0; font-size: .95rem; }
.tip-card { position: sticky; top: calc(var(--header-h) + 24px); background: var(--ink); color: #D9CFC6; border-radius: var(--r-panel); padding: 32px 30px; }
.tip-card h3 { color: #fff; }
.tip-card ul { padding-left: 1.1em; margin-bottom: 24px; }
.tip-card li { margin-bottom: 8px; }
.tip-card li::marker { color: var(--gold); }

/* ---------- Download panel ---------- */
.download-panel { display: grid; grid-template-columns: 1.1fr .9fr; gap: 40px; align-items: center; background: var(--grad-brand); border-radius: 40px; padding: 60px 64px; color: rgba(255, 255, 255, .88); position: relative; overflow: hidden; box-shadow: var(--shadow-lg); }
.download-panel::before { content: ""; position: absolute; width: 380px; height: 380px; border-radius: 50%; border: 60px solid rgba(255, 255, 255, .07); right: -120px; top: -140px; }
.download-panel h2 { color: #fff; }
.download-panel .lead { font-size: 1.08rem; }
.file-facts { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin: 28px 0 32px; }
.file-facts div { background: rgba(255, 255, 255, .12); border: 1px solid rgba(255, 255, 255, .18); border-radius: 16px; padding: 14px 16px; }
.file-facts dt { font-size: .8rem; opacity: .8; }
.file-facts dd { margin: 0; color: #fff; font-weight: 600; }
.download-actions { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.download-note { font-size: .86rem; margin: 18px 0 0; opacity: .85; }
.download-art img { width: 100%; max-width: 420px; margin: 0 auto; animation: float 7s ease-in-out infinite; }

/* ---------- Safety notice ---------- */
.notice { display: grid; grid-template-columns: auto 1fr; gap: 26px; background: var(--gold-soft); border: 1px solid #F6D77E; border-radius: var(--r-panel); padding: 36px 40px; }
.notice-icon { width: 64px; height: 64px; border-radius: 20px; background: #fff; display: grid; place-items: center; color: #A35A0A; box-shadow: var(--shadow-sm); }
.notice-icon svg { width: 32px; height: 32px; }
.notice h2 { font-size: 1.6rem; }
.notice ul { margin: 0; }
.notice li { margin-bottom: 6px; }

/* ---------- Pros & cons ---------- */
.pc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.pc-card { border-radius: var(--r-card); padding: 32px; background: #fff; border: 1px solid var(--line); }
.pc-card h3 { display: flex; align-items: center; gap: 12px; }
.pc-card h3 span { width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center; font-size: 1.1rem; }
.pc-pros h3 span { background: var(--moss-soft); color: var(--moss-dark); }
.pc-cons h3 span { background: var(--danger-soft); color: var(--danger); }
.pc-card ul { list-style: none; padding: 0; margin: 0; }
.pc-card li { padding: 12px 0; border-top: 1px dashed var(--line); font-size: .96rem; }
.pc-card li:first-child { border-top: 0; }

/* ---------- Release info ---------- */
.release-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin: 0; }
.release-grid div { background: #fff; border-radius: var(--r-card); padding: 22px; border: 1px solid var(--line); }
.release-grid dt { font-size: .84rem; color: var(--ink-3); margin-bottom: 4px; }
.release-grid dd { margin: 0; color: var(--ink); font-weight: 600; font-size: 1.02rem; line-height: 1.4; }
.release-foot { margin-top: 26px; font-size: .94rem; }

/* ---------- Troubleshooting ---------- */
.trouble-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.trouble { border-radius: var(--r-card); padding: 26px; background: #fff; border: 1px solid var(--line); }
.trouble h3 { font-size: 1.04rem; display: flex; gap: 10px; align-items: flex-start; }
.trouble h3::before { content: "!"; flex: none; width: 24px; height: 24px; border-radius: 8px; background: var(--danger-soft); color: var(--danger); display: grid; place-items: center; font-size: .85rem; margin-top: 1px; }
.trouble p { margin: 0; font-size: .94rem; }
.trouble-cta { margin-top: 36px; display: flex; flex-wrap: wrap; gap: 16px; align-items: center; justify-content: space-between; background: #fff; border: 1px solid var(--line); border-radius: var(--r-card); padding: 22px 26px; }
.trouble-cta p { margin: 0; color: var(--ink); font-weight: 500; }

/* ---------- Post cards (guides preview + blog) ---------- */
.post-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.post-card { background: #fff; border-radius: var(--r-card); overflow: hidden; border: 1px solid var(--line); display: flex; flex-direction: column; transition: transform .3s var(--ease), box-shadow .3s var(--ease); }
.post-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.post-card .thumb { aspect-ratio: 1200 / 630; overflow: hidden; background: var(--mist); }
.post-card .thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s var(--ease); }
.post-card:hover .thumb img { transform: scale(1.04); }
.post-card .body { padding: 22px 24px 26px; display: flex; flex-direction: column; flex: 1; }
.post-card .tag { align-self: flex-start; font-size: .78rem; font-weight: 600; color: var(--lapis); background: var(--lapis-soft); padding: 4px 11px; border-radius: var(--r-pill); margin-bottom: 12px; }
.post-card h3 { font-size: 1.1rem; margin-bottom: .5em; }
.post-card h3 a { color: var(--ink); }
.post-card h3 a:hover { color: var(--moss-dark); }
.post-card p { font-size: .93rem; margin-bottom: 18px; }
.post-card .text-link { margin-top: auto; font-size: .92rem; }
.post-card.is-featured { grid-column: span 3; display: grid; grid-template-columns: 1.15fr .85fr; }
.post-card.is-featured .thumb { aspect-ratio: auto; }
.post-card.is-featured .body { padding: 40px; justify-content: center; }
.post-card.is-featured h3 { font-size: 1.6rem; }
.center-row { text-align: center; margin-top: 44px; }

/* ---------- FAQ (sticky intro + tabbed accordion) ---------- */
.faq-grid { display: grid; grid-template-columns: 360px 1fr; gap: 56px; align-items: start; }
.faq-intro { position: sticky; top: calc(var(--header-h) + 28px); }
.faq-tabs { display: flex; flex-direction: column; gap: 10px; margin-top: 28px; }
.faq-tab { font-family: inherit; text-align: left; cursor: pointer; display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 16px 20px; border-radius: var(--r-card); border: 1.5px solid var(--line); background: #fff; color: var(--ink); font-weight: 600; font-size: .98rem; transition: border-color .25s var(--ease), background-color .25s var(--ease), color .25s var(--ease); }
.faq-tab span { font-size: .8rem; font-weight: 600; background: var(--mist); color: var(--ink-3); padding: 3px 10px; border-radius: var(--r-pill); }
.faq-tab:hover { border-color: var(--moss); }
.faq-tab[aria-selected="true"] { border-color: var(--moss); background: var(--moss-soft); color: var(--moss-dark); }
.faq-tab[aria-selected="true"] span { background: var(--moss); color: #fff; }
.faq-panel[hidden] { display: none; }
.faq-panel h3.faq-cat { font-size: 1.05rem; color: var(--ink-3); font-weight: 600; margin: 0 0 16px; }
.faq-item { background: #fff; border: 1px solid var(--line); border-radius: 18px; margin-bottom: 12px; transition: box-shadow .3s var(--ease), border-color .3s var(--ease); }
.faq-item.is-open { border-color: transparent; box-shadow: var(--shadow-md); }
.faq-q { margin: 0; font-size: 1rem; }
.faq-btn { width: 100%; font-family: inherit; font-size: 1rem; font-weight: 600; color: var(--ink); text-align: left; background: none; border: 0; cursor: pointer; padding: 20px 22px; display: flex; gap: 16px; justify-content: space-between; align-items: center; border-radius: 18px; }
.faq-icon { flex: none; width: 32px; height: 32px; border-radius: 50%; background: var(--mist); position: relative; transition: background-color .3s var(--ease), transform .35s var(--ease); }
.faq-icon::before, .faq-icon::after { content: ""; position: absolute; left: 50%; top: 50%; width: 12px; height: 2px; background: var(--ink); border-radius: 2px; transform: translate(-50%, -50%); transition: transform .35s var(--ease), background-color .3s; }
.faq-icon::after { transform: translate(-50%, -50%) rotate(90deg); }
.faq-item.is-open .faq-icon { background: var(--moss); transform: rotate(180deg); }
.faq-item.is-open .faq-icon::before, .faq-item.is-open .faq-icon::after { background: #fff; }
.faq-item.is-open .faq-icon::after { transform: translate(-50%, -50%) rotate(0deg); }
.faq-a { display: grid; grid-template-rows: 0fr; transition: grid-template-rows .4s var(--ease); }
.faq-a > div { overflow: hidden; }
.faq-a p { margin: 0; padding: 0 22px 22px; font-size: .96rem; }
.faq-item.is-open .faq-a { grid-template-rows: 1fr; }

/* ---------- Footer ---------- */
.site-footer { background: var(--mist); border-top: 1px solid var(--line); padding: 72px 0 0; font-size: .94rem; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1.2fr; gap: 48px; padding-bottom: 52px; }
.footer-brand p { max-width: 360px; margin: 18px 0; }
.footer-email { display: inline-flex; align-items: center; gap: 10px; background: #fff; border: 1px solid var(--line); border-radius: var(--r-pill); padding: 9px 16px; color: var(--ink); font-weight: 500; user-select: all; }
.footer-email svg { width: 17px; height: 17px; color: var(--moss); }
.site-footer h2 { font-size: 1rem; margin-bottom: 18px; }
.footer-links { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.footer-links a { color: var(--ink-2); text-decoration: none; }
.footer-links a:hover { color: var(--moss-dark); text-decoration: none; }
.footer-bottom { border-top: 1px solid var(--line); padding: 22px 0; text-align: center; font-size: .88rem; }
.footer-bottom a { color: var(--ink); font-weight: 600; text-decoration: none; }
.footer-bottom p { margin: 0; }
.footer-disclaimer { font-size: .82rem; color: var(--ink-3); margin-top: 6px !important; }

/* ---------- Page hero, breadcrumbs, prose ---------- */
.page-hero { background: var(--grad-soft); padding: 64px 0 56px; position: relative; overflow: hidden; }
.page-hero::after { content: ""; position: absolute; width: 360px; height: 360px; border-radius: 50%; background: #FFD2BC; filter: blur(70px); opacity: .6; right: -100px; top: -120px; }
.page-hero .container { position: relative; z-index: 1; }
.page-hero h1 { font-size: clamp(2rem, 4vw, 3rem); max-width: 820px; }
.page-hero p { max-width: 680px; font-size: 1.08rem; margin: 0; }
.breadcrumb { list-style: none; padding: 0; margin: 0 0 20px; display: flex; flex-wrap: wrap; gap: 8px; font-size: .88rem; }
.breadcrumb li { display: flex; align-items: center; gap: 8px; color: var(--ink-3); }
.breadcrumb li + li::before { content: "/"; color: var(--line); color: #C9B8A8; }
.breadcrumb a { color: var(--ink-2); }
.post-meta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.post-meta span { background: rgba(255, 255, 255, .8); border: 1px solid var(--line); padding: 5px 12px; border-radius: var(--r-pill); font-size: .84rem; color: var(--ink); }

.prose { color: var(--ink-2); font-size: 1.04rem; }
.prose h2 { font-size: 1.6rem; margin-top: 1.8em; }
.prose h3 { font-size: 1.2rem; margin-top: 1.5em; }
.prose a { text-decoration: underline; text-decoration-color: rgba(168, 48, 15, .3); text-underline-offset: 3px; }
.prose li { margin-bottom: .45em; }
.prose table { width: 100%; border-collapse: collapse; font-size: .95rem; margin: 0 0 1.4em; }
.prose th, .prose td { border: 1px solid var(--line); padding: 12px 14px; text-align: left; }
.prose th { background: var(--mist); color: var(--ink); }
.prose .callout { background: var(--lapis-soft); border-radius: var(--r-card); padding: 20px 24px; margin: 1.6em 0; color: var(--ink); }
.prose .callout p:last-child { margin: 0; }
.prose code { background: var(--mist); padding: 2px 7px; border-radius: 6px; font-size: .9em; color: var(--ink); }
.feature-img { border-radius: var(--r-card); margin-bottom: 36px; box-shadow: var(--shadow-md); width: 100%; }

.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 56px; padding-top: 64px; padding-bottom: 96px; }
.sidebar { display: grid; gap: 22px; align-content: start; position: sticky; top: calc(var(--header-h) + 24px); }
.side-card { background: #fff; border: 1px solid var(--line); border-radius: var(--r-card); padding: 24px; }
.side-card h2 { font-size: 1.02rem; margin-bottom: 14px; }
.side-card ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; font-size: .93rem; }
.side-card ul a { color: var(--ink-2); }
.side-card ul a:hover { color: var(--moss-dark); }
.side-card.dark { background: var(--grad-brand); border: 0; color: rgba(255, 255, 255, .9); }
.side-card.dark h2 { color: #fff; font-size: 1.15rem; }
.side-card.dark p { font-size: .92rem; }
.toc ol { padding-left: 1.2em; margin: 0; font-size: .92rem; display: grid; gap: 8px; }
.toc a { color: var(--ink-2); }
.related { border-top: 1px solid var(--line); margin-top: 56px; padding-top: 40px; }
.related .post-grid { grid-template-columns: repeat(3, 1fr); gap: 18px; }
.related .post-card .body { padding: 18px; }
.related .post-card h3 { font-size: .98rem; }

.page-body { padding: 64px 0 96px; }
.page-body .prose { max-width: 780px; }
.info-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin: 36px 0; }
.info-card { background: #fff; border: 1px solid var(--line); border-radius: var(--r-card); padding: 26px; }
.info-card h2, .info-card h3 { font-size: 1.05rem; margin-bottom: .4em; }
.info-card p { margin: 0; font-size: .95rem; }
.email-plain { display: inline-block; font-weight: 600; color: var(--ink); background: var(--moss-soft); padding: 6px 12px; border-radius: 10px; user-select: all; word-break: break-all; }

/* ---------- Scroll to top ---------- */
.to-top { position: fixed; right: 22px; bottom: 22px; width: 50px; height: 50px; border-radius: 16px; border: 0; background: var(--ink); color: #fff; cursor: pointer; display: grid; place-items: center; box-shadow: var(--shadow-lg); opacity: 0; visibility: hidden; transform: translateY(12px); transition: opacity .3s var(--ease), transform .3s var(--ease), visibility .3s, background-color .2s; z-index: 90; }
.to-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }
.to-top:hover { background: var(--moss); }
.to-top svg { width: 20px; height: 20px; }

/* ---------- Reveal & keyframes ---------- */
.js .reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.js .reveal.is-visible { opacity: 1; transform: none; }
.js .reveal-d1 { transition-delay: .08s; }
.js .reveal-d2 { transition-delay: .16s; }
.js .reveal-d3 { transition-delay: .24s; }
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-12px); } }
@keyframes drift { from { transform: translate(0, 0) scale(1); } to { transform: translate(60px, 40px) scale(1.12); } }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition-duration: .01ms !important; }
  .js .reveal { opacity: 1; transform: none; }
}

/* ---------- Responsive ---------- */
@media (max-width: 1100px) {
  .nav-list a { padding: 8px 9px; font-size: .88rem; }
  .usecase-grid, .release-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 980px) {
  :root { --header-h: 68px; }
  .site-header { backdrop-filter: none; -webkit-backdrop-filter: none; background: #fff; }
  .nav-toggle { display: inline-flex; }
  .main-nav { position: fixed; top: var(--header-h); left: 0; right: 0; bottom: 0; background: #fff; padding: 20px 24px 32px; opacity: 0; transform: translateY(-10px); visibility: hidden; pointer-events: none; transition: opacity .3s var(--ease), transform .3s var(--ease), visibility .3s; overflow-y: auto; margin: 0; }
  .main-nav.is-open { opacity: 1; transform: none; visibility: visible; pointer-events: auto; }
  .nav-list { flex-direction: column; align-items: stretch; gap: 4px; }
  .nav-list a { padding: 14px 16px; font-size: 1.02rem; border-radius: 14px; }
  .header-cta { margin: 14px 0 0; width: 100%; }
  .hero-grid, .about-grid, .install-grid, .download-panel, .faq-grid, .article-layout { grid-template-columns: 1fr; }
  .hero { padding: 48px 0 72px; }
  .hero-visual { max-width: 560px; margin: 0 auto; }
  .about-media { max-width: 580px; }
  .feature-grid, .trouble-grid, .post-grid, .info-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-card.is-wide { grid-column: span 2; }
  .post-card.is-featured { grid-column: span 2; grid-template-columns: 1fr; }
  .post-card.is-featured .body { padding: 26px; }
  .post-card.is-featured .thumb { aspect-ratio: 1200 / 630; }
  .tip-card, .faq-intro, .sidebar { position: static; }
  .download-panel { padding: 44px 32px; }
  .download-art { order: -1; }
  .download-art img { max-width: 280px; }
  .related .post-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: span 2; }
}
@media (max-width: 680px) {
  .section { padding: 72px 0; }
  .section-head { margin-bottom: 36px; }
  .container { padding: 0 18px; }
  .feature-grid, .trouble-grid, .post-grid, .info-grid, .usecase-grid, .release-grid, .pc-grid, .related .post-grid { grid-template-columns: 1fr; }
  .feature-card.is-wide, .post-card.is-featured { grid-column: auto; }
  .feature-card.is-wide { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; gap: 32px; }
  .steps::before { top: 0; bottom: 0; left: 28px; right: auto; width: 2px; height: auto; background: repeating-linear-gradient(180deg, var(--line) 0 10px, transparent 10px 18px); }
  .step { text-align: left; display: grid; grid-template-columns: 58px 1fr; gap: 18px; padding: 0; }
  .step-num { margin: 0; }
  .step p { margin: 0; }
  .hero-chip { font-size: .8rem; padding: 9px 12px; }
  .hero-chip i { width: 28px; height: 28px; }
  .hero-chip.c2 { right: 0; }
  .hero-chip.c1 { left: 0; }
  .about-badge { right: 12px; bottom: -24px; }
  .notice { grid-template-columns: 1fr; padding: 28px 24px; }
  .file-facts { grid-template-columns: 1fr; }
  .download-panel { padding: 36px 22px; border-radius: 28px; }
  .download-actions .btn { width: 100%; white-space: normal; }
  .hero-actions .btn { flex: 1 1 100%; }
  .install-steps li { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-brand { grid-column: auto; }
  .trouble-cta { flex-direction: column; align-items: flex-start; }
}

/* ---------- Post card heading variants & prose overrides ---------- */
.post-card h2 { font-size: 1.1rem; margin-bottom: .5em; letter-spacing: -.01em; }
.post-card h2 a { color: var(--ink); }
.post-card h2 a:hover { color: var(--moss-dark); }
.post-card.is-featured h2 { font-size: 1.6rem; }
.prose .post-card a { text-decoration: none; }
.prose .post-card h3 { margin-top: 0; }
.prose .post-card p { font-size: .9rem; }
.prose .related h2 { margin-top: 0; }