/*
Theme Name: Turbulence Realm
Theme URI: https://www.turbulencerealm.com/
Author: Fayaz Rasheed
Author URI: https://fayazrasheed.com/
Description: A software product theme for Turbulence Realm — a suite of desktop applications for video-based fluid-flow analysis. Features a hero with app mockup, product cards, bento feature grid, workflow steps, tutorials, and a download section.
Version: 1.0.0
License: MIT
License URI: https://opensource.org/licenses/MIT
Text Domain: turbulence-realm
Tags: software, product, fluid-dynamics, custom-colors, custom-menu, featured-images, threaded-comments, translation-ready
*/


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

:root{
  /* Palette (retained) */
  --bg:#f6f3ec;
  --bg-alt:#efeae0;
  --bg-deep:#e9e2d3;
  --surface:#ffffff;
  --surface-soft:rgba(255,255,255,0.7);
  --gold:#a67c2a;
  --gold-light:#c6993a;
  --gold-dim:#7a5a1d;
  --gold-soft:rgba(166,124,42,0.10);
  --slate:#4a4f5a;
  --slate-deep:#2c3038;
  --ink:#1a1d24;
  --text:#1a1d24;
  --text-dim:#5a606b;
  --border:rgba(166,124,42,0.18);
  --border-strong:rgba(166,124,42,0.34);
  --shadow-sm:0 1px 2px rgba(60,50,20,0.06);
  --shadow-md:0 8px 30px -12px rgba(122,90,29,0.22);
  --shadow-lg:0 24px 60px -20px rgba(122,90,29,0.30);
  --radius:14px;
  --radius-sm:8px;
  --radius-lg:22px;
  --ease:cubic-bezier(0.22,1,0.36,1);
  --maxw:1180px;
  --font-sans:'DM Sans',system-ui,-apple-system,sans-serif;
  --font-serif:'Cormorant Garamond',Georgia,serif;
}

html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font-sans);
  background:var(--bg);
  color:var(--text);
  line-height:1.65;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font:inherit;cursor:pointer;border:none;background:none;color:inherit}
ul{list-style:none}
::selection{background:var(--gold);color:#fff}

/* Subtle paper grain */
body::before{
  content:'';position:fixed;inset:0;z-index:0;pointer-events:none;opacity:0.5;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 0.65 0 0 0 0 0.49 0 0 0 0 0.16 0 0 0 0.04 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
/* Soft gold glow top-right */
body::after{
  content:'';position:fixed;top:-30vh;right:-20vw;width:70vw;height:70vw;border-radius:50%;
  background:radial-gradient(circle,rgba(166,124,42,0.10),transparent 60%);
  z-index:0;pointer-events:none;
}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px;position:relative;z-index:1}

/* ============ Top bar ============ */
.topbar{
  position:fixed;top:0;left:0;right:0;z-index:100;
  transition:background .35s var(--ease),box-shadow .35s var(--ease),border-color .35s;
  border-bottom:1px solid transparent;
}
.topbar.scrolled{
  background:rgba(246,243,236,0.85);
  backdrop-filter:blur(16px) saturate(1.2);
  -webkit-backdrop-filter:blur(16px) saturate(1.2);
  border-bottom-color:var(--border);
}
.topbar-inner{max-width:var(--maxw);margin:0 auto;padding:16px 24px;display:flex;align-items:center;gap:24px}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--font-serif);font-size:1.35rem;font-weight:600;color:var(--gold);letter-spacing:.5px}
.brand-mark{width:34px;height:34px;flex-shrink:0}
.nav{display:flex;gap:28px;margin-left:8px}
.nav a{font-size:.86rem;font-weight:500;letter-spacing:.3px;color:var(--text-dim);transition:color .25s;position:relative;padding:6px 0}
.nav a:hover,.nav a.active{color:var(--ink)}
.nav a.active::after{content:'';position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--gold);border-radius:2px}
.topbar-actions{margin-left:auto;display:flex;align-items:center;gap:14px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:600;font-size:.88rem;letter-spacing:.2px;border-radius:999px;padding:11px 20px;transition:transform .25s var(--ease),box-shadow .25s,background .25s,color .25s,border-color .25s;white-space:nowrap}
.btn-primary{background:linear-gradient(135deg,var(--gold-light),var(--gold-dim));color:#fff;box-shadow:0 6px 18px -8px rgba(122,90,29,0.6)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 28px -10px rgba(122,90,29,0.65)}
.btn-ghost{background:var(--surface-soft);border:1px solid var(--border);color:var(--ink);backdrop-filter:blur(6px)}
.btn-ghost:hover{border-color:var(--border-strong);background:#fff}
.btn-sm{padding:8px 16px;font-size:.82rem}
.btn svg{width:17px;height:17px;fill:currentColor;flex-shrink:0}
.btn-lg{padding:14px 26px;font-size:.95rem}

.burger{display:none;flex-direction:column;gap:5px;padding:8px;margin-left:auto}
.burger span{width:22px;height:2px;background:var(--ink);border-radius:2px;transition:.3s}
.mobile-nav{position:fixed;inset:0;z-index:99;background:rgba(246,243,236,0.97);backdrop-filter:blur(20px);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:24px;opacity:0;visibility:hidden;transition:.35s}
.mobile-nav.open{opacity:1;visibility:visible}
.mobile-nav a{font-family:var(--font-serif);font-size:1.6rem;color:var(--ink)}
.mobile-nav .btn{margin-top:12px}

/* ============ Hero ============ */
.hero{padding:140px 0 70px;position:relative}
.hero-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:56px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:.74rem;font-weight:600;letter-spacing:2.5px;text-transform:uppercase;color:var(--gold);background:var(--gold-soft);border:1px solid var(--border);padding:7px 14px;border-radius:999px;margin-bottom:22px}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--gold);box-shadow:0 0 0 4px rgba(166,124,42,0.18)}
.hero h1{font-family:var(--font-serif);font-weight:500;font-size:clamp(2.6rem,5.4vw,4.2rem);line-height:1.04;letter-spacing:-.5px;margin-bottom:20px}
.hero h1 em{font-style:italic;color:var(--gold)}
.hero .lede{font-size:1.12rem;color:var(--text-dim);max-width:520px;margin-bottom:30px;line-height:1.7}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:34px}
.hero-meta{display:flex;gap:28px;flex-wrap:wrap}
.hero-meta .hm{display:flex;flex-direction:column}
.hero-meta .hm b{font-family:var(--font-serif);font-size:1.6rem;font-weight:600;color:var(--ink);line-height:1}
.hero-meta .hm span{font-size:.74rem;letter-spacing:1px;text-transform:uppercase;color:var(--text-dim);margin-top:6px}

/* App window mockup */
.mockup{position:relative;perspective:1600px}
.window{
  background:var(--slate-deep);border-radius:14px;box-shadow:var(--shadow-lg);
  overflow:hidden;border:1px solid rgba(255,255,255,0.06);
  transform:rotateY(-9deg) rotateX(4deg) rotate(0.6deg);transition:transform .6s var(--ease);
}
.mockup:hover .window{transform:rotateY(-5deg) rotateX(2deg) rotate(0deg)}
.win-bar{display:flex;align-items:center;gap:8px;padding:11px 14px;background:#23272f;border-bottom:1px solid rgba(255,255,255,0.05)}
.win-dot{width:11px;height:11px;border-radius:50%;background:#3a3f48}
.win-dot:nth-child(1){background:#e06c5b}.win-dot:nth-child(2){background:#e3b341}.win-dot:nth-child(3){background:#6ec07a}
.win-title{margin-left:10px;font-size:.72rem;color:#8b94a3;letter-spacing:.5px}
.win-body{display:grid;grid-template-columns:54px 1fr;height:340px}
.win-rail{background:#1d2128;border-right:1px solid rgba(255,255,255,0.04);display:flex;flex-direction:column;align-items:center;gap:16px;padding:16px 0}
.rail-ic{width:26px;height:26px;border-radius:7px;background:rgba(255,255,255,0.05);display:flex;align-items:center;justify-content:center}
.rail-ic.on{background:linear-gradient(135deg,#22d3ee,#818cf8)}
.rail-ic svg{width:14px;height:14px;fill:#aab2c0}
.rail-ic.on svg{fill:#fff}
.win-canvas{position:relative;background:#171a20;overflow:hidden}
.flow-bg{position:absolute;inset:0;opacity:.9}
.quiver{position:absolute;inset:0}
.quiver svg{width:100%;height:100%}
.win-panel{position:absolute;right:10px;top:10px;width:120px;background:rgba(13,16,22,0.7);border:1px solid rgba(255,255,255,0.07);border-radius:8px;padding:10px;backdrop-filter:blur(6px)}
.win-panel .pl{font-size:.6rem;letter-spacing:1px;text-transform:uppercase;color:#22d3ee;margin-bottom:6px}
.win-panel .pv{font-family:var(--font-serif);font-size:1.1rem;color:#fff;line-height:1.2}
.win-panel .pv small{font-size:.6rem;color:#8b94a3;display:block}
.win-status{position:absolute;left:10px;bottom:10px;right:10px;display:flex;gap:10px;align-items:center;font-size:.62rem;color:#8b94a3}
.win-status .pill{background:rgba(34,211,238,0.15);color:#22d3ee;padding:3px 8px;border-radius:999px;font-weight:600}
.win-status .bar{flex:1;height:4px;background:rgba(255,255,255,0.08);border-radius:2px;overflow:hidden}
.win-status .bar i{display:block;height:100%;width:68%;background:linear-gradient(90deg,#22d3ee,#818cf8)}

/* floating equation chip */
.eq-chip{
  position:absolute;left:-26px;bottom:38px;background:#fff;border:1px solid var(--border);
  border-radius:12px;padding:14px 18px;box-shadow:var(--shadow-md);max-width:230px;
  font-family:var(--font-serif);font-style:italic;color:var(--slate);
}
.eq-chip .eq-label{font-family:var(--font-sans);font-style:normal;font-size:.62rem;letter-spacing:1.5px;text-transform:uppercase;color:var(--gold);margin-bottom:6px;font-weight:600}
.eq-chip .eq{font-size:1.05rem;line-height:1.4}
.eq-chip .eq sub{font-size:.6em}
.eq-chip::after{content:'';position:absolute;right:-7px;top:18px;width:12px;height:12px;background:#fff;border-right:1px solid var(--border);border-top:1px solid var(--border);transform:rotate(45deg)}

/* ============ Section primitives ============ */
.section{padding:88px 0;position:relative;z-index:1}
.section-head{max-width:640px;margin:0 auto 56px;text-align:center}
.section-head.l{margin-left:0;margin-right:auto;text-align:left}
.kicker{font-size:.72rem;font-weight:600;letter-spacing:2.5px;text-transform:uppercase;color:var(--gold);margin-bottom:12px;display:block}
.section-head h2{font-family:var(--font-serif);font-weight:500;font-size:clamp(2rem,3.6vw,2.9rem);line-height:1.1;letter-spacing:-.3px}
.section-head p{color:var(--text-dim);font-size:1.05rem;margin-top:14px}

/* ============ Tech strip ============ */
.techstrip{padding:30px 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border);background:var(--surface-soft)}
.techstrip-inner{display:flex;align-items:center;gap:14px;flex-wrap:wrap;justify-content:center;color:var(--text-dim)}
.techstrip span{font-size:.78rem;letter-spacing:1px;text-transform:uppercase;font-weight:600}
.techstrip .sep{width:4px;height:4px;border-radius:50%;background:var(--border-strong)}

/* ============ Products ============ */
.products{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.product{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:34px;box-shadow:var(--shadow-sm);transition:transform .4s var(--ease),box-shadow .4s,border-color .4s;
  display:flex;flex-direction:column;position:relative;overflow:hidden;
}
.product::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--gold-light),var(--gold-dim));transform:scaleX(0);transform-origin:left;transition:transform .5s var(--ease)}
.product:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:var(--border-strong)}
.product:hover::before{transform:scaleX(1)}
.product-head{display:flex;align-items:center;gap:14px;margin-bottom:18px}
.product-icon{width:52px;height:52px;border-radius:12px;background:linear-gradient(135deg,var(--gold-light),var(--gold-dim));display:flex;align-items:center;justify-content:center;flex-shrink:0}
.product-icon svg{width:26px;height:26px;fill:#fff}
.product-name{font-family:var(--font-serif);font-size:1.5rem;font-weight:600;line-height:1.1}
.product-ver{font-size:.7rem;letter-spacing:1.5px;text-transform:uppercase;color:var(--gold);font-weight:600;margin-top:4px}
.product p{color:var(--slate);font-size:.96rem;margin-bottom:18px}
.product-tags{display:flex;flex-wrap:wrap;gap:7px;margin-bottom:22px}
.product-tags span{font-size:.72rem;font-weight:500;padding:5px 11px;background:var(--gold-soft);color:var(--gold-dim);border-radius:6px;border:1px solid var(--border)}
.product-links{display:flex;gap:18px;margin-top:auto;flex-wrap:wrap}
.product-links a{font-size:.84rem;font-weight:600;color:var(--gold);display:inline-flex;align-items:center;gap:6px;transition:gap .25s,color .25s}
.product-links a:hover{color:var(--gold-dim);gap:10px}
.product-links a svg{width:15px;height:15px;fill:currentColor}

/* mini mockup inside product */
.product-mock{margin:6px 0 20px;height:120px;border-radius:10px;background:var(--slate-deep);position:relative;overflow:hidden;border:1px solid rgba(255,255,255,0.05)}
.product-mock .mb{position:absolute;inset:0}

/* ============ Bento features ============ */
.bento{display:grid;grid-template-columns:repeat(4,1fr);grid-auto-rows:minmax(150px,auto);gap:18px}
.bento-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:24px;box-shadow:var(--shadow-sm);transition:transform .35s var(--ease),box-shadow .35s,border-color .35s;
  display:flex;flex-direction:column;
}
.bento-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--border-strong)}
.bento-card.wide{grid-column:span 2}
.bento-card.tall{grid-row:span 2}
.bento-ic{width:40px;height:40px;border-radius:10px;background:var(--gold-soft);display:flex;align-items:center;justify-content:center;margin-bottom:14px;color:var(--gold-dim)}
.bento-ic svg{width:21px;height:21px;fill:currentColor}
.bento-card h3{font-family:var(--font-serif);font-size:1.3rem;font-weight:600;margin-bottom:8px}
.bento-card p{font-size:.9rem;color:var(--text-dim);margin-bottom:14px}
.chips{display:flex;flex-wrap:wrap;gap:6px;margin-top:auto}
.chips span{font-size:.72rem;padding:4px 9px;background:var(--bg-alt);border:1px solid var(--border);border-radius:6px;color:var(--slate)}

/* mini viz inside tall bento */
.miniviz{flex:1;margin:10px -4px 4px;border-radius:8px;background:var(--slate-deep);position:relative;overflow:hidden;min-height:90px}
.miniviz svg{width:100%;height:100%}

/* ============ Workflow ============ */
.workflow{background:var(--bg-alt);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;counter-reset:step;position:relative}
.steps::before{content:'';position:absolute;top:34px;left:8%;right:8%;height:2px;background:repeating-linear-gradient(90deg,var(--border-strong) 0 8px,transparent 8px 16px)}
.step{position:relative;padding:0 18px;text-align:center}
.step-num{
  width:68px;height:68px;margin:0 auto 18px;border-radius:50%;background:var(--surface);
  border:2px solid var(--gold);display:flex;align-items:center;justify-content:center;
  font-family:var(--font-serif);font-size:1.6rem;font-weight:600;color:var(--gold);position:relative;z-index:1;
  box-shadow:0 0 0 6px var(--bg-alt);
}
.step h4{font-family:var(--font-serif);font-size:1.2rem;font-weight:600;margin-bottom:8px}
.step p{font-size:.88rem;color:var(--text-dim)}

/* ============ Tutorials preview ============ */
.tut-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.tut-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:26px;
  box-shadow:var(--shadow-sm);transition:transform .35s var(--ease),box-shadow .35s,border-color .35s;
  display:flex;flex-direction:column;position:relative;overflow:hidden;
}
.tut-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-md);border-color:var(--border-strong)}
.tut-card::after{content:'';position:absolute;bottom:0;left:0;height:2px;width:0;background:var(--gold);transition:width .4s var(--ease)}
.tut-card:hover::after{width:100%}
.tut-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.tut-num{font-family:var(--font-serif);font-size:2rem;font-weight:300;color:var(--gold);opacity:.5;line-height:1}
.tut-pill{font-size:.62rem;letter-spacing:1px;text-transform:uppercase;font-weight:600;padding:4px 10px;border-radius:6px;background:var(--gold-soft);color:var(--gold-dim)}
.tut-card h3{font-family:var(--font-serif);font-size:1.25rem;font-weight:600;margin-bottom:10px;line-height:1.2}
.tut-card p{font-size:.88rem;color:var(--text-dim);margin-bottom:18px;flex:1}
.tut-link{font-size:.82rem;font-weight:600;color:var(--gold);display:inline-flex;align-items:center;gap:6px;transition:gap .25s}
.tut-link:hover{gap:10px}
.center-cta{text-align:center;margin-top:40px}

/* ============ Download ============ */
.download{background:linear-gradient(180deg,var(--bg) 0%,var(--bg-alt) 100%)}
.dl-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.dl-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:30px;
  box-shadow:var(--shadow-sm);transition:transform .35s var(--ease),box-shadow .35s,border-color .35s;
  display:flex;flex-direction:column;
}
.dl-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-md);border-color:var(--border-strong)}
.dl-ic{width:48px;height:48px;border-radius:12px;background:linear-gradient(135deg,var(--gold-light),var(--gold-dim));display:flex;align-items:center;justify-content:center;margin-bottom:18px}
.dl-ic svg{width:24px;height:24px;fill:#fff}
.dl-card h3{font-family:var(--font-serif);font-size:1.4rem;font-weight:600;margin-bottom:6px}
.dl-platform{font-size:.72rem;letter-spacing:1.5px;text-transform:uppercase;color:var(--gold);font-weight:600;margin-bottom:14px}
.dl-card p{font-size:.9rem;color:var(--text-dim);margin-bottom:16px}
.dl-code{background:var(--slate-deep);color:#e8e6e0;border-radius:10px;padding:14px 16px;font-size:.78rem;line-height:1.6;overflow-x:auto;margin-bottom:18px;font-family:ui-monospace,'SFMono-Regular',Menlo,monospace;white-space:pre}
.dl-code .c{color:#8b94a3}
.dl-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:auto}

/* ============ CTA band ============ */
.cta-band{padding:80px 0}
.cta-inner{
  background:linear-gradient(135deg,var(--slate-deep),#3a414c);border-radius:var(--radius-lg);
  padding:56px;text-align:center;color:#fff;position:relative;overflow:hidden;box-shadow:var(--shadow-lg);
}
.cta-inner::before{content:'';position:absolute;inset:0;background:radial-gradient(circle at 20% 20%,rgba(166,124,42,0.35),transparent 50%),radial-gradient(circle at 80% 80%,rgba(34,211,238,0.18),transparent 50%)}
.cta-inner>*{position:relative;z-index:1}
.cta-inner h2{font-family:var(--font-serif);font-size:clamp(1.9rem,3.4vw,2.7rem);font-weight:500;margin-bottom:14px}
.cta-inner p{color:rgba(255,255,255,0.78);max-width:480px;margin:0 auto 26px;font-size:1.05rem}
.cta-inner .btn-primary{box-shadow:0 10px 30px -10px rgba(166,124,42,0.8)}

/* ============ Footer ============ */
footer{border-top:1px solid var(--border);background:var(--surface-soft);padding:56px 0 32px;position:relative;z-index:1}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;margin-bottom:36px}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.foot-brand .brand-mark{width:30px;height:30px}
.foot-brand b{font-family:var(--font-serif);font-size:1.2rem;color:var(--gold)}
.foot-about{font-size:.86rem;color:var(--text-dim);max-width:280px}
.foot-col h5{font-size:.72rem;letter-spacing:1.5px;text-transform:uppercase;color:var(--ink);font-weight:700;margin-bottom:14px}
.foot-col a{display:block;font-size:.88rem;color:var(--text-dim);padding:5px 0;transition:color .25s}
.foot-col a:hover{color:var(--gold)}
.foot-bottom{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:16px;padding-top:24px;border-top:1px solid var(--border)}
.foot-bottom p{font-size:.8rem;color:var(--text-dim)}
.foot-social{display:flex;gap:10px}
.foot-social a{width:36px;height:36px;border:1px solid var(--border);border-radius:50%;display:flex;align-items:center;justify-content:center;transition:.25s;background:#fff}
.foot-social a:hover{border-color:var(--gold);background:var(--gold-soft)}
.foot-social svg{width:15px;height:15px;fill:var(--slate)}
.foot-social a:hover svg{fill:var(--gold)}

/* ============ Page hero (sub pages) ============ */
.page-hero{padding:130px 0 40px;text-align:center}
.page-hero .kicker{margin-bottom:10px}
.page-hero h1{font-family:var(--font-serif);font-weight:500;font-size:clamp(2.2rem,4.6vw,3.4rem);line-height:1.08;letter-spacing:-.3px}
.page-hero h1 em{font-style:italic;color:var(--gold)}
.page-hero p{color:var(--text-dim);font-size:1.08rem;max-width:580px;margin:16px auto 0}

/* ============ Tutorials page ============ */
.tut-layout{display:grid;grid-template-columns:240px 1fr;gap:40px;align-items:start;padding-bottom:80px}
.toc{position:sticky;top:96px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow-sm)}
.toc h4{font-size:.7rem;letter-spacing:2px;text-transform:uppercase;color:var(--gold);font-weight:700;margin-bottom:14px}
.toc-grp{margin-bottom:16px}
.toc-grp b{display:block;font-family:var(--font-serif);font-size:1rem;color:var(--ink);margin-bottom:8px;font-weight:600}
.toc a{display:block;font-size:.82rem;color:var(--text-dim);padding:5px 0 5px 12px;border-left:2px solid transparent;transition:.25s;margin-left:-12px}
.toc a:hover{color:var(--gold);border-left-color:var(--gold)}
.lesson{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:34px;
  margin-bottom:22px;box-shadow:var(--shadow-sm);scroll-margin-top:96px;
}
.lesson .pill{display:inline-block;font-size:.64rem;letter-spacing:1px;text-transform:uppercase;font-weight:600;padding:4px 10px;border-radius:6px;background:var(--gold-soft);color:var(--gold-dim);margin-bottom:12px}
.lesson h2{font-family:var(--font-serif);font-size:1.85rem;font-weight:600;line-height:1.15;margin-bottom:14px}
.lesson h3{font-family:var(--font-serif);font-size:1.3rem;font-weight:600;margin:24px 0 10px;color:var(--slate)}
.lesson p{color:var(--slate);margin-bottom:14px;font-size:.98rem}
.lesson ol,.lesson ul{color:var(--slate);margin:0 0 14px 22px;font-size:.98rem}
.lesson li{margin-bottom:7px}
.lesson code{font-family:ui-monospace,Menlo,monospace;font-size:.84rem;background:var(--gold-soft);border:1px solid var(--border);border-radius:4px;padding:.1em .4em;color:var(--gold-dim)}
.lesson pre{background:var(--slate-deep);color:#e8e6e0;border-radius:10px;padding:16px 18px;overflow-x:auto;margin-bottom:16px;font-size:.82rem;line-height:1.6;font-family:ui-monospace,Menlo,monospace}
.lesson pre code{background:none;border:none;color:inherit;padding:0;font-size:inherit}
.lesson .tip{background:var(--gold-soft);border-left:3px solid var(--gold);border-radius:0 8px 8px 0;padding:12px 16px;margin:16px 0;font-size:.9rem;color:var(--slate)}
.lesson .tip strong{color:var(--gold-dim)}
.kbd{display:inline-block;font-family:ui-monospace,Menlo,monospace;font-size:.74rem;background:var(--bg-alt);border:1px solid var(--border);border-bottom-width:2px;border-radius:4px;padding:.1em .45em;color:var(--ink)}

/* ============ Download page tabs ============ */
.dl-tabs{display:flex;gap:8px;justify-content:center;margin-bottom:32px;flex-wrap:wrap;background:var(--surface);border:1px solid var(--border);border-radius:999px;padding:6px;width:max-content;max-width:100%;margin-left:auto;margin-right:auto;box-shadow:var(--shadow-sm)}
.dl-tab{padding:10px 22px;border-radius:999px;font-size:.86rem;font-weight:600;letter-spacing:.2px;color:var(--text-dim);transition:.25s}
.dl-tab:hover{color:var(--ink)}
.dl-tab.active{background:linear-gradient(135deg,var(--gold-light),var(--gold-dim));color:#fff;box-shadow:0 4px 14px -6px rgba(122,90,29,0.6)}
.dl-panel{display:none}
.dl-panel.active{display:block;animation:fadeUp .5s var(--ease) both}
@keyframes fadeUp{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
.opt-table{width:100%;border-collapse:collapse;margin-bottom:16px;font-size:.9rem}
.opt-table th,.opt-table td{padding:11px 14px;text-align:left;border-bottom:1px solid var(--border)}
.opt-table th{font-size:.68rem;letter-spacing:1px;text-transform:uppercase;color:var(--gold);font-weight:700}
.opt-table td{color:var(--slate)}
.opt-table code{font-size:.82rem;background:var(--gold-soft);border:1px solid var(--border);border-radius:4px;padding:.1em .4em;color:var(--gold-dim)}

/* ============ Reveal ============ */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ============ Responsive ============ */
@media(max-width:980px){
  .hero-grid{grid-template-columns:1fr;gap:48px}
  .mockup{max-width:520px;margin:0 auto;width:100%}
  .products{grid-template-columns:1fr}
  .bento{grid-template-columns:repeat(2,1fr)}
  .bento-card.wide{grid-column:span 2}
  .steps{grid-template-columns:repeat(2,1fr);gap:36px 0}
  .steps::before{display:none}
  .tut-grid{grid-template-columns:1fr 1fr}
  .dl-grid{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px}
  .tut-layout{grid-template-columns:1fr;gap:24px}
  .toc{position:static}
}
@media(max-width:720px){
  .nav,.topbar-actions .btn-ghost{display:none}
  .burger{display:flex}
  .section{padding:64px 0}
  .hero{padding:120px 0 50px}
  .bento{grid-template-columns:1fr}
  .bento-card.wide{grid-column:span 1}
  .tut-grid{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .cta-inner{padding:36px 24px}
  .eq-chip{display:none}
}
@media(prefers-reduced-motion:reduce){
  *{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none}
}