/* ===== Shared Case Study Page Styles ===== */
:root{
  --bg:#ffffff;--card:#f8fafc;--ink:#0f172a;--sub:#334155;--muted:#64748b;
  --border:#e2e8f0;--accent:#2563eb;--accent-ink:#0b2a6f;
  --shadow:rgba(15,23,42,.08);
}
:root[data-theme="dark"]{
  --bg:#0f172a;--card:#1e293b;--ink:#e2e8f0;--sub:#94a3b8;--muted:#64748b;
  --border:#334155;--accent:#60a5fa;--accent-ink:#bfdbfe;
  --shadow:rgba(0,0,0,.3);
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:"Inter",system-ui,-apple-system,sans-serif;color:var(--ink);background:var(--bg);line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-decoration:none} a:hover{text-decoration:underline}
img{max-width:100%;height:auto;display:block}

/* Layout */
.wrap{max-width:860px;margin:0 auto;padding:0 clamp(16px,4vw,32px)}
.back{display:inline-block;padding:1.5rem 0;font-size:.875rem;font-weight:600;color:var(--muted)}
.back:hover{color:var(--ink);text-decoration:none}

/* Hero */
.project-hero{padding:2rem 0 1.5rem;border-bottom:1px solid var(--border)}
.project-hero h1{font-size:clamp(1.75rem,4vw,2.5rem);font-variation-settings:"wght" 750;line-height:1.15;margin:0}
.project-hero p{color:var(--sub);margin:.5rem 0 0;max-width:68ch;font-size:1.05rem}
.project-hero .meta{display:flex;flex-wrap:wrap;gap:.4rem .8rem;margin:.75rem 0 0;font-size:.85rem;color:var(--muted)}
.project-hero .meta span{padding:.2rem .5rem;background:var(--card);border:1px solid var(--border);border-radius:6px;font-weight:600}

/* Cover image */
.cover-img{width:100%;border-radius:12px;margin-bottom:1.5rem}

/* Version bar */
.version-bar{display:flex;flex-wrap:wrap;gap:.5rem;align-items:center;padding:1.25rem 0;border-bottom:1px solid var(--border)}
.version-bar label{font-weight:700;font-size:.875rem}
.version-bar select{padding:.45rem .65rem;border:1px solid var(--border);border-radius:8px;font-weight:600;font-size:.875rem;background:var(--bg);color:var(--ink)}
.version-bar .btn{display:inline-block;padding:.45rem .85rem;border-radius:8px;background:var(--accent);color:var(--bg);font-weight:700;font-size:.875rem}
.version-bar .btn:hover{filter:brightness(.92);text-decoration:none}
.version-bar .btn-alt{background:var(--sub)}

/* Content */
.content{padding:2rem 0 3rem}
.content h2{font-size:1.35rem;font-variation-settings:"wght" 700;margin:2rem 0 .6rem;padding-top:1rem;border-top:1px solid var(--border)}
.content h2:first-child{border-top:0;padding-top:0;margin-top:0}
.content p{margin:0 0 .75rem;max-width:68ch}
.content ul{padding-left:1.25rem;margin:0 0 1rem}
.content li{margin:.25rem 0;max-width:68ch}
.content dl{display:grid;grid-template-columns:auto 1fr;gap:.3rem .75rem;margin:.75rem 0 1rem;font-size:.95rem}
.content dt{font-weight:700}
.content dd{margin:0;color:var(--sub)}

/* TL;DR card */
.tldr{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:clamp(14px,2vw,20px);margin:1.5rem 0}
.tldr h2{border:0;padding:0;margin:0 0 .5rem}

/* Preview embed */
.preview{border:1px solid var(--border);border-radius:12px;overflow:hidden;margin:1rem 0}
.preview iframe{width:100%;height:400px;border:0;display:block}
.preview-label{font-size:.8rem;color:var(--muted);padding:.5rem .75rem;border-top:1px solid var(--border);font-weight:600}

/* Taller preview for full-app demos */
.preview-tall iframe{height:480px}

/* Back nav */
.nav-back{padding:2rem 0;border-top:1px solid var(--border);text-align:center}
.nav-back a{font-weight:600;color:var(--muted);font-size:.9rem}
.nav-back a:hover{color:var(--ink)}

/* Doc link button */
.doc-link{display:inline-block;margin:1rem 0;padding:.5rem 1rem;border-radius:8px;background:var(--accent);color:var(--bg);font-weight:700;font-size:.9rem}
.doc-link:hover{filter:brightness(.92);text-decoration:none}

/* Links row (MoodPeek) */
.links{display:flex;flex-wrap:wrap;gap:.5rem;margin:.75rem 0}
.links a{display:inline-block;padding:.45rem .85rem;border-radius:8px;background:var(--accent);color:var(--bg);font-weight:700;font-size:.875rem}
.links a:hover{filter:brightness(.92);text-decoration:none}

/* ===== Site Tools ===== */
.site-tools{display:flex;align-items:center;gap:.5rem}
.site-tools select{padding:.3rem .4rem;border:1px solid var(--border);border-radius:6px;background:var(--card);color:var(--ink);font-size:.78rem;font-weight:600;cursor:pointer}
.theme-toggle{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border:1px solid var(--border);border-radius:8px;background:var(--card);color:var(--ink);font-size:1.1rem;cursor:pointer;transition:background .15s,color .15s;line-height:1;padding:0}
.theme-toggle:hover{background:var(--accent);color:var(--bg)}

/* ===== Focus & Accessibility ===== */
:focus-visible{outline:3px solid #94a3b8;outline-offset:2px}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}