/* TeslaBytes — "Precision Instrument" design system
   Editorial automotive dark: layered warm-blacks, grain + dim red glow,
   Bricolage Grotesque display / Hanken Grotesk body / Spline Sans Mono numerals. */

:root {
  --bg:        #0a0a0e;
  --bg-2:      #0d0d12;
  --surface:   #121218;
  --raised:    #17171f;
  --line:      rgba(255,255,255,.08);
  --line-soft: rgba(255,255,255,.05);

  --red:       #ff2d4d;       /* Tesla signal red, slightly hot for screens */
  --red-deep:  #e31937;
  --ice:       #6ea2ff;       /* gas / secondary, cool steel-blue */
  --green:     #2fd27a;       /* savings / positive */
  --amber:     #f5b13d;

  --text:      #f3f0ea;       /* warm off-white */
  --muted:     #9a9aab;
  --dim:       #6a6a7a;

  --display: 'Bricolage Grotesque', Georgia, serif;
  --body:    'Hanken Grotesk', system-ui, sans-serif;
  --mono:    'Spline Sans Mono', ui-monospace, monospace;

  --maxw: 1200px;
  --r-sm: 10px; --r: 16px; --r-lg: 22px;
  --shadow: 0 24px 60px -28px rgba(0,0,0,.85);
  --shadow-red: 0 20px 60px -24px rgba(227,25,55,.45);
  --ease: cubic-bezier(.2,.7,.2,1);
}

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

html { -webkit-text-size-adjust:100%; }
body {
  font-family: var(--body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  letter-spacing: .005em;
  -webkit-font-smoothing: antialiased;
  position: relative;
  overflow-x: hidden;
}
/* Atmosphere: dim red + cool glows, anchored top */
body::before {
  content:""; position:fixed; inset:0; z-index:-2; pointer-events:none;
  background:
    radial-gradient(60% 50% at 18% -8%, rgba(227,25,55,.16), transparent 60%),
    radial-gradient(50% 40% at 95% 0%, rgba(60,110,220,.10), transparent 55%),
    linear-gradient(180deg, var(--bg-2), var(--bg) 40%);
}
/* Fine grain for richness */
body::after {
  content:""; position:fixed; inset:0; z-index:-1; pointer-events:none; opacity:.04;
  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='.85' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

::selection { background: rgba(255,45,77,.28); color:#fff; }

a { color: var(--ice); text-decoration: none; }

h1,h2,h3 { font-family: var(--display); font-weight: 700; letter-spacing:-.02em; line-height:1.04; color:#fff; }

.num, .mono { font-family: var(--mono); font-variant-numeric: tabular-nums; letter-spacing:-.01em; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top:0; z-index:100;
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  backdrop-filter: blur(14px) saturate(1.3);
  -webkit-backdrop-filter: blur(14px) saturate(1.3);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  max-width: var(--maxw); margin:0 auto; padding: .9rem 1.5rem;
  display:flex; justify-content:space-between; align-items:center; gap:1rem;
}
.logo { font-family:var(--display); font-size:1.45rem; font-weight:800; letter-spacing:-.03em; display:flex; align-items:center; gap:.1rem; }
.logo-tesla { color: var(--red); }
.logo-bytes { color:#fff; }
nav { display:flex; gap:.25rem; flex-wrap:wrap; }
nav a {
  color: var(--muted); font-size:.82rem; font-weight:600; letter-spacing:.01em;
  padding:.4rem .7rem; border-radius:8px; position:relative; transition: color .2s var(--ease), background .2s var(--ease);
}
nav a:hover { color:#fff; background: rgba(255,255,255,.04); }
@media (max-width:760px){
  .header-inner { flex-wrap:wrap; gap:.5rem; }
  nav { width:100%; flex-wrap:nowrap; overflow-x:auto; scrollbar-width:none; -webkit-overflow-scrolling:touch; }
  nav::-webkit-scrollbar { display:none; }
  nav a { white-space:nowrap; padding:.35rem .55rem; }
}

/* Ticker — refined, quiet */
.ticker {
  border-bottom:1px solid var(--line-soft);
  background: linear-gradient(90deg, rgba(227,25,55,.08), transparent 60%);
  overflow:hidden; white-space:nowrap;
}
.ticker-text {
  display:inline-block; padding:.45rem 0; color: var(--dim);
  font-family:var(--mono); font-size:.66rem; letter-spacing:.28em; text-transform:uppercase;
  animation: marquee 32s linear infinite;
}
@keyframes marquee { from{transform:translateX(0)} to{transform:translateX(-50%)} }

main { display:block; }

/* ---------- Reveal motion ---------- */
@keyframes reveal { from { opacity:0; transform: translateY(16px); } to { opacity:1; transform:none; } }
.hero, .home-tool, .home-guides, .calc-hero, .products, .about-hero { animation: reveal .7s var(--ease) both; }
.home-tool { animation-delay:.06s; } .home-guides { animation-delay:.12s; }
@media (prefers-reduced-motion: reduce){ *{ animation:none!important; transition:none!important; } }

/* ---------- Hero ---------- */
.hero { max-width: var(--maxw); margin:0 auto; padding: 4.5rem 1.5rem 1.5rem; }
.hero h1 { font-size: clamp(2.6rem, 6vw, 4.6rem); font-weight:800; max-width: 16ch; }
.hero h1::after { content:"."; color: var(--red); }
.hero-sub { color: var(--muted); font-size: 1.12rem; max-width: 56ch; margin-top:1.1rem; }

/* ---------- Home featured tool ---------- */
.home-tool { max-width: var(--maxw); margin: 2rem auto 0; padding: 0 1.5rem; }
.home-tool-inner {
  position:relative; overflow:hidden;
  background:
    radial-gradient(80% 120% at 0% 0%, rgba(227,25,55,.16), transparent 55%),
    linear-gradient(180deg, var(--raised), var(--surface));
  border:1px solid var(--line); border-radius: var(--r-lg);
  padding: 2.4rem 2.4rem; box-shadow: var(--shadow);
}
.home-tool-inner::before { /* instrument hairline grid */
  content:""; position:absolute; inset:0; pointer-events:none; opacity:.5;
  background-image: linear-gradient(var(--line-soft) 1px, transparent 1px); background-size: 100% 38px;
  -webkit-mask-image: linear-gradient(180deg, transparent, #000 80%); mask-image: linear-gradient(180deg, transparent, #000 80%);
}
.home-tool-badge {
  display:inline-flex; align-items:center; gap:.4rem; font-family:var(--mono);
  font-size:.66rem; letter-spacing:.18em; text-transform:uppercase; color:var(--red);
  border:1px solid rgba(255,45,77,.35); background:rgba(227,25,55,.08); padding:.32rem .7rem; border-radius:50px;
}
.home-tool h2 { font-size: clamp(1.7rem, 3.6vw, 2.5rem); margin:.9rem 0 .6rem; }
.home-tool h2 span { color: var(--red); }
.home-tool p { color: var(--muted); max-width: 64ch; font-size:1.05rem; }
.home-tool-btn {
  display:inline-flex; align-items:center; gap:.5rem; margin-top:1.4rem;
  background: var(--red-deep); color:#fff; font-weight:700; font-size:.98rem;
  padding:.9rem 1.6rem; border-radius:12px; box-shadow: var(--shadow-red);
  transition: transform .18s var(--ease), box-shadow .18s var(--ease), background .18s;
}
.home-tool-btn:hover { transform: translateY(-2px); background:#f12340; box-shadow:0 26px 70px -22px rgba(227,25,55,.6); }
.home-tool-link { color: var(--muted); font-weight:600; font-size:.9rem; margin-left:1.2rem; border-bottom:1px solid transparent; }
.home-tool-link:hover { color:#fff; border-color: var(--line); }
@media (max-width:600px){ .home-tool-link{ display:block; margin:1rem 0 0; } }

/* ---------- Home guides ---------- */
.home-guides { max-width: var(--maxw); margin: 3rem auto 0; padding: 0 1.5rem; }
.section-head { margin: 0 0 1.2rem; display:flex; align-items:baseline; gap:1rem; flex-wrap:wrap; }
.section-head h2 { font-size: 1.7rem; }
.section-head p { color: var(--dim); font-size:.98rem; }

.news-grid {
  max-width: var(--maxw); margin:0 auto; padding: 0;
  display:grid; grid-template-columns: repeat(auto-fill, minmax(320px,1fr)); gap:1.1rem;
}
.news-card {
  position:relative; background: var(--surface); border:1px solid var(--line);
  border-radius: var(--r); padding:1.5rem 1.4rem; overflow:hidden;
  transition: transform .22s var(--ease), border-color .22s var(--ease), background .22s;
}
.news-card::before { content:""; position:absolute; left:0; top:0; height:2px; width:0; background: var(--red); transition: width .3s var(--ease); }
.news-card:hover { transform: translateY(-4px); border-color: rgba(255,255,255,.16); background: var(--raised); }
.news-card:hover::before { width:100%; }
.news-card h3 { font-size:1.12rem; color:#fff; margin-bottom:.45rem; transition: color .2s; }
.news-card:hover h3 { color: var(--text); }
.news-card p { color: var(--muted); font-size:.92rem; }

/* legacy news placeholder bits (kept minimal) */
.categories{ display:none; }
.card-tag{ display:inline-block; font-family:var(--mono); font-size:.62rem; letter-spacing:.16em; text-transform:uppercase; color:var(--red); margin-bottom:.5rem; }
.card-meta{ display:flex; gap:.8rem; margin-top:.8rem; color:var(--dim); font-size:.74rem; font-family:var(--mono); }

/* ---------- About ---------- */
.about-hero { max-width: 820px; margin:0 auto; padding: 4rem 1.5rem 1rem; }
.about-hero h1 { font-size: clamp(2.2rem,5vw,3.2rem); }
.about-hero .tagline { color: var(--muted); font-size:1.1rem; margin-top:.6rem; }
.about-body { max-width:820px; margin:0 auto; padding:1rem 1.5rem 4rem; color: var(--muted); }
.about-body h2 { color:#fff; font-size:1.4rem; margin:1.8rem 0 .5rem; }
.about-body ul { margin-left:1.1rem; } .about-body li { margin:.3rem 0; }
.about-body a { color: var(--ice); }

/* ---------- Editorial article (guides, methodology) ---------- */
.calc-seo { max-width: 720px; margin: 0 auto; padding: 2.6rem 1.5rem 4rem; color: var(--muted); font-size: 1.06rem; line-height: 1.75; }
.calc-seo h1 { font-size: clamp(2rem, 4.6vw, 2.9rem); color:#fff; margin-bottom: 1rem; letter-spacing:-.025em; }
.calc-seo h2 { font-family: var(--display); font-size: 1.55rem; color:#fff; margin: 2.3rem 0 .6rem; }
.calc-seo h3 { font-family: var(--display); font-size: 1.12rem; color: var(--red); margin: 1.7rem 0 .4rem; }
.calc-seo p, .calc-seo li { font-size: 1.06rem; }
.calc-seo ul { margin: .6rem 0 .6rem 1.2rem; } .calc-seo li { margin: .35rem 0; }
.calc-seo strong { color: var(--text); }
.calc-seo a { color: var(--ice); border-bottom: 1px solid rgba(110,162,255,.28); transition: border-color .2s; }
.calc-seo a:hover { border-color: var(--ice); }
.calc-seo em { color: var(--muted); }

/* Editorial data table */
.table-wrap { overflow-x:auto; border:1px solid var(--line); border-radius: var(--r); margin: 1rem 0; }
.data-table { width:100%; border-collapse:collapse; font-size:.92rem; min-width:520px; }
.data-table th { text-align:left; padding:.7rem .9rem; background: var(--raised); color: var(--muted); font-family:var(--body); font-size:.72rem; text-transform:uppercase; letter-spacing:.06em; position:sticky; top:0; }
.data-table td { padding:.6rem .9rem; border-top:1px solid var(--line-soft); color: var(--text); }
.data-table tr:hover td { background: rgba(255,255,255,.02); }
.data-table .num { font-family: var(--mono); font-variant-numeric: tabular-nums; text-align:right; color:#fff; }
.data-table td:last-child { color: var(--muted); font-size:.86rem; }

/* ---------- Footer ---------- */
footer { border-top:1px solid var(--line); margin-top:4rem; background: var(--bg-2); }
.footer-inner { max-width: var(--maxw); margin:0 auto; padding:2.5rem 1.5rem; display:flex; justify-content:space-between; gap:1.5rem; flex-wrap:wrap; }
.footer-inner p { color: var(--dim); font-size:.85rem; }
.footer-links { display:flex; gap:1.3rem; flex-wrap:wrap; }
.footer-links a { color: var(--muted); font-size:.85rem; font-weight:600; }
.footer-links a:hover { color:#fff; }