/* Case-study shared styles — mirrors index.html design system */
:root {
  --bg: #07070f; --bg2: #0b0b18; --card: #10101f; --card-hi: #151527;
  --accent: #4f8ef7; --accent2: #8b7cf6; --gold: #f0b429; --mint: #34d399;
  --text: #e8ecf4; --bright: #ffffff; --muted: #8b93a7; --faint: #5b6274;
  --border: #1c1e33; --border-hi: #2a2d4a; --tag-bg: #171930;
  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}
html[data-theme="light"] {
  --bg: #f6f7fb; --bg2: #edeff7; --card: #ffffff; --card-hi: #f4f6fc;
  --accent: #2f6be0; --accent2: #7452e8; --gold: #a97300; --mint: #0d9268;
  --text: #262b3d; --bright: #0e1322; --muted: #5b6378; --faint: #8d94a8;
  --border: #e2e5f0; --border-hi: #ccd3e8; --tag-bg: #eef1f9;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { background: var(--bg); color: var(--text); font-family: var(--font-body); line-height: 1.7; -webkit-font-smoothing: antialiased; }
::selection { background: rgba(79,142,247,0.35); color: #fff; }
nav { position: fixed; top: 0; width: 100%; background: rgba(7,7,15,0.75); backdrop-filter: blur(16px); border-bottom: 1px solid var(--border); z-index: 100; padding: 0 2rem; }
html[data-theme="light"] nav { background: rgba(246,247,251,0.82); }
nav .inner { max-width: 880px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; padding: 0.95rem 0; }
nav a { color: var(--muted); text-decoration: none; font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase; transition: color 0.2s; }
nav a:hover { color: var(--accent); }
.theme-toggle { background: transparent; border: 1px solid var(--border-hi); color: var(--muted); width: 32px; height: 32px; border-radius: 999px; cursor: pointer; font-size: 0.95rem; display: flex; align-items: center; justify-content: center; transition: color 0.2s, border-color 0.2s, transform 0.3s var(--ease-out); }
.theme-toggle:hover { color: var(--accent); border-color: var(--accent); transform: rotate(40deg); }
main { max-width: 880px; margin: 0 auto; padding: 8rem 2rem 5rem; }
.crumb { font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--accent); margin-bottom: 1.2rem; display: flex; align-items: center; gap: 0.7rem; }
.crumb::before { content: ''; width: 30px; height: 1px; background: var(--accent); }
h1 { font-family: var(--font-display); font-size: clamp(2rem, 4.6vw, 3.2rem); font-weight: 700; line-height: 1.1; letter-spacing: -0.025em; color: var(--bright); margin-bottom: 1rem; }
.lede { font-size: 1.08rem; color: var(--muted); max-width: 640px; margin-bottom: 1.8rem; }
.lede strong { color: var(--text); }
.meta-row { display: flex; flex-wrap: wrap; gap: 0.55rem; margin-bottom: 2.6rem; }
.chip { background: var(--tag-bg); border: 1px solid var(--border-hi); border-radius: 999px; padding: 0.3rem 0.85rem; font-family: var(--font-mono); font-size: 0.72rem; color: var(--accent); }
.chip.gold { color: var(--gold); border-color: rgba(240,180,41,0.35); }
.actions { display: flex; gap: 0.9rem; flex-wrap: wrap; margin-bottom: 3.5rem; }
.btn { padding: 0.7rem 1.5rem; border-radius: 10px; text-decoration: none; font-size: 0.87rem; font-weight: 600; font-family: var(--font-display); transition: transform 0.2s var(--ease-out), box-shadow 0.2s; }
.btn-primary { background: var(--accent); color: #050508; }
html[data-theme="light"] .btn-primary { color: #fff; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 30px rgba(79,142,247,0.35); }
.btn-outline { border: 1px solid var(--border-hi); color: var(--text); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }
h2 { font-family: var(--font-display); font-size: 1.45rem; font-weight: 700; letter-spacing: -0.015em; color: var(--bright); margin: 3rem 0 1.1rem; display: flex; align-items: baseline; gap: 0.8rem; }
h2 .num { font-family: var(--font-mono); font-size: 0.78rem; color: var(--accent); font-weight: 500; }
p.body { color: var(--muted); margin-bottom: 1rem; max-width: 680px; }
p.body strong { color: var(--text); }
.stat-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 0.9rem; margin: 1.4rem 0; }
.stat { background: linear-gradient(160deg, var(--card-hi), var(--card)); border: 1px solid var(--border); border-radius: 14px; padding: 1.2rem 1.1rem; }
html[data-theme="light"] .stat { background: #fff; }
.stat b { display: block; font-family: var(--font-display); font-size: 1.6rem; font-weight: 700; letter-spacing: -0.02em; color: var(--bright); }
.stat span { font-size: 0.68rem; color: var(--faint); font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.07em; }
ol.steps { list-style: none; counter-reset: step; margin: 1.2rem 0; }
ol.steps li { counter-increment: step; position: relative; padding: 0 0 1.4rem 3.2rem; }
ol.steps li::before { content: counter(step, decimal-leading-zero); position: absolute; left: 0; top: 0.1rem; font-family: var(--font-mono); font-size: 0.78rem; color: var(--accent); border: 1px solid var(--border-hi); border-radius: 9px; width: 2.2rem; height: 2.2rem; display: flex; align-items: center; justify-content: center; background: var(--card); }
ol.steps li:not(:last-child)::after { content: ''; position: absolute; left: 1.1rem; top: 2.6rem; bottom: 0.2rem; width: 1px; background: var(--border); }
ol.steps b { color: var(--bright); font-family: var(--font-display); display: block; margin-bottom: 0.15rem; }
ol.steps li, ol.steps li p { color: var(--muted); font-size: 0.92rem; }
ul.wins { list-style: none; margin: 1.2rem 0; }
ul.wins li { position: relative; padding: 0.3rem 0 0.3rem 1.4rem; color: var(--muted); font-size: 0.94rem; }
ul.wins li::before { content: '▸'; position: absolute; left: 0; color: var(--mint); }
ul.wins strong { color: var(--text); }
.stack { display: flex; flex-wrap: wrap; gap: 0.45rem; margin: 1.2rem 0 2rem; }
.stack span { background: rgba(79,142,247,0.07); border: 1px solid rgba(79,142,247,0.2); color: #9dbdf7; font-size: 0.74rem; font-family: var(--font-mono); padding: 0.22rem 0.6rem; border-radius: 6px; }
html[data-theme="light"] .stack span { background: rgba(47,107,224,0.06); border-color: rgba(47,107,224,0.25); color: #2f5cc0; }
.next { border-top: 1px solid var(--border); margin-top: 3.5rem; padding-top: 1.8rem; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 1rem; }
.next a { color: var(--muted); text-decoration: none; font-family: var(--font-mono); font-size: 0.78rem; transition: color 0.2s; }
.next a:hover { color: var(--accent); }
footer { text-align: center; padding: 2.2rem; border-top: 1px solid var(--border); color: var(--faint); font-size: 0.75rem; font-family: var(--font-mono); }
@media (max-width: 640px) { main { padding: 7rem 1.25rem 3.5rem; } }