:root{
  --bg: #0d0f13;
  --panel: #141822;
  --muted: #9aa3af;
  --text: #e8eef6;
  --accent: #6ee7b7;
  --accent-2:#60a5fa;
  --danger:#f87171;
  --warn:#fbbf24;
  --ok:#34d399;
  --chip:#1f2431;
  --border:#1f2937;
  --shadow: 0 6px 24px rgba(0,0,0,0.25), 0 2px 8px rgba(0,0,0,0.2);

  /* New dynamic hues */
  --acc-h: 190; /* controlled by slider */
  --acc: hsl(var(--acc-h) 90% 64%);
  --acc-2: hsl(calc(var(--acc-h) + 60) 90% 66%);
  --ring: hsla(var(--acc-h), 90%, 64%, .35);
}

html[data-theme="light"]{
  --bg: #f7fafc;
  --panel: #ffffff;
  --muted: #475569;
  --text: #0f172a;
  --chip:#eef2ff;
  --border:#e2e8f0;
  --shadow: 0 10px 30px rgba(2,6,23,.08), 0 2px 10px rgba(2,6,23,.06);
}

*{box-sizing:border-box}
html,body{margin:0;padding:0;background:radial-gradient(1000px 400px at 20% -10%, rgba(96,165,250,.12), transparent), radial-gradient(800px 300px at 90% 10%, rgba(110,231,183,.1), transparent), var(--bg);color:var(--text);font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";scroll-behavior:smooth}

/* Header */
.app-header{
  position:sticky;top:0;z-index:20;
  display:grid;grid-template-columns:1fr auto;align-items:center;gap:12px;
  padding:12px 16px;background:linear-gradient(180deg, rgba(16,21,34,.9) 0%, rgba(13,15,19,.75) 100%);
  backdrop-filter: blur(6px);
  border-bottom:1px solid var(--border);
  box-shadow: var(--shadow);
}
.brand{display:flex;align-items:center;gap:10px}
.brand-emoji{font-size:22px}
.app-header h1{font-size:16px;margin:0;font-weight:700;letter-spacing:.2px}
.top-actions{display:flex;align-items:center;gap:10px}
.top-actions .gh-link{color:var(--muted);text-decoration:none;font-size:12px;opacity:.9}
.color-tuner{display:flex;align-items:center;gap:6px}
.color-tuner input[type="range"]{accent-color: var(--acc);width:120px}

#scrollProgress{grid-column:1/-1;height:3px;background:transparent;position:relative;overflow:hidden;border-radius:999px}
#scrollProgress span{position:absolute;left:0;top:0;height:100%;width:0;background:linear-gradient(90deg, var(--acc), var(--acc-2))}

/* Layout */
.app-shell{display:grid;grid-template-columns:260px 1fr;min-height:calc(100svh - 64px)}
.sidebar{
  border-right:1px solid var(--border);
  background:var(--panel);
  padding:12px 8px;
  position:sticky;top:64px;height:calc(100svh - 64px);overflow:auto;
}
.sidebar .collapse{
  display:none;
  background:transparent;border:1px solid var(--border);color:var(--muted);
  padding:6px 8px;border-radius:6px;margin-bottom:12px;cursor:pointer
}
.nav{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px}
.nav a{
  display:flex;align-items:center;justify-content:space-between;gap:8px;
  padding:10px 12px;border-radius:10px;color:var(--text);text-decoration:none;
  background:linear-gradient(180deg, transparent, transparent);
  border:1px solid transparent;transition: .2s ease;
}
.nav a:hover{background:var(--chip);border-color:var(--border)}
.nav a.active{
  border-color: color-mix(in srgb, var(--acc) 40%, var(--border));
  background: linear-gradient(180deg, color-mix(in srgb, var(--acc) 9%, transparent), transparent);
  box-shadow: 0 0 0 3px var(--ring);
}
.content{padding:20px;display:grid;gap:24px}
section.section{
  background:linear-gradient(180deg, color-mix(in srgb, var(--panel) 92%, black), var(--panel));
  border:1px solid var(--border);border-radius:16px;padding:18px;
  box-shadow: var(--shadow); position: relative; overflow: hidden;
}
section.section::after{
  content:"";position:absolute;inset:0;border-radius:16px;padding:1px;
  background: linear-gradient(120deg, transparent, color-mix(in srgb, var(--acc) 10%, transparent), transparent);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude; pointer-events:none
}
section h2{margin:0 0 10px;font-size:18px}
section p{color:var(--muted);margin:8px 0 0;line-height:1.65}

/* Section title with copy link */
.section-title{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
.section-title h2{font-size:20px;letter-spacing:.2px}
.icon-btn{border:1px solid var(--border);background:transparent;color:var(--muted);border-radius:8px;padding:6px 8px;cursor:pointer}
.icon-btn:hover{border-color:var(--acc);color:var(--text)}

/* Hero */
.hero{
  position:relative; border:1px solid var(--border); border-radius:18px; margin:16px 20px 0 20px;
  background: radial-gradient(1200px 400px at -10% 0%, color-mix(in srgb, var(--acc) 18%, transparent), transparent),
              radial-gradient(900px 300px at 120% -10%, color-mix(in srgb, var(--acc-2) 16%, transparent), transparent),
              linear-gradient(180deg, #101522, #0d0f13);
  box-shadow: var(--shadow); overflow: hidden;
}
.hero-main{padding:28px}
.hero-title{margin:0 0 6px 0;display:flex;flex-direction:column;gap:4px}
.hero-title .spark{
  font-size:28px;font-weight:800; letter-spacing:.3px;
  background:linear-gradient(90deg, var(--acc), var(--acc-2));
  -webkit-background-clip:text; background-clip:text; color:transparent; text-shadow: 0 0 30px color-mix(in srgb, var(--acc) 35%, transparent);
}
.hero-title small{font-size:14px;color:var(--muted);font-weight:600}
.hero-sub{color:var(--muted);margin:6px 0 14px 0}
.hero-cta{display:flex;gap:10px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--border);padding:10px 14px;border-radius:12px;text-decoration:none;color:var(--text);transition:.2s;cursor:pointer}
.btn:hover{transform:translateY(-1px)}
.btn.primary{background:linear-gradient(180deg, var(--acc), var(--acc-2));color:#0b1020;border-color:transparent;font-weight:700}
.btn.ghost{background:transparent}
.hero-stats{display:flex;gap:18px;flex-wrap:wrap;margin-top:12px}
.stat{background:rgba(255,255,255,.03);border:1px solid var(--border);padding:10px 12px;border-radius:12px;min-width:120px}
.stat-value{font-weight:800;font-size:18px}
.stat-label{font-size:12px;color:var(--muted)}
.hero-glow{position:absolute;inset:auto -20% -40% -20%;height:180px;background:radial-gradient(60% 100% at 50% 100%, color-mix(in srgb, var(--acc) 12%, transparent), transparent)}

/* Cards and grids */
.grid{display:grid;gap:12px}
.grid.cols-2{grid-template-columns:repeat(2, minmax(0,1fr))}
.grid.cols-3{grid-template-columns:repeat(3, minmax(0,1fr))}
.grid.responsive{grid-template-columns:repeat(auto-fit, minmax(240px,1fr))}
.grid.fancy .card{position:relative; overflow:hidden}
.grid.fancy .card::before{
  content:""; position:absolute; inset:-1px; border-radius:12px; pointer-events:none;
  background: linear-gradient(120deg, transparent, color-mix(in srgb, var(--acc) 12%, transparent), transparent);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
}

.card{
  background:linear-gradient(180deg, #151a26, #101621);
  border:1px solid var(--border);border-radius:12px;padding:14px;transition: transform .15s ease, border-color .2s ease, box-shadow .2s ease;
}
.hoverable:hover{transform: translateY(-3px); border-color: color-mix(in srgb, var(--acc) 30%, var(--border)); box-shadow: 0 10px 30px rgba(0,0,0,.25)}
.kpi{display:flex;align-items:center;justify-content:space-between;min-height:70px}
.kpi .value{font-size:20px;font-weight:800}
.kpi .label{font-size:12px;color:var(--muted)}
.kpi .chip{background:var(--chip);border:1px solid var(--border);padding:2px 8px;border-radius:999px;font-size:12px;color:var(--muted)}

.controls{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:8px;align-items:center}
.control{display:flex;flex-direction:column;gap:4px}
.input, select, button{
  background:#0f1420;color:var(--text);border:1px solid var(--border);
  border-radius:8px;padding:8px 10px;font-size:14px
}
html[data-theme="light"] .input, html[data-theme="light"] select, html[data-theme="light"] button{background:#f8fafc;color:#0f172a}
button{cursor:pointer}
button.primary{background:linear-gradient(180deg, #2563eb,#1d4ed8);border-color:#1e40af}
button.ghost{background:transparent}
button.badge{padding:4px 8px;font-size:12px;border-radius:999px}
.badge.ok{border-color:transparent;background:rgba(52,211,153,.12);color:var(--ok)}
.badge.warn{background:rgba(251,191,36,.12);color:var(--warn)}
.badge.danger{background:rgba(248,113,113,.12);color:var(--danger)}

.table{width:100%;border-collapse:collapse}
.table th,.table td{padding:10px;border-bottom:1px solid var(--border);text-align:left}
.table th{color:var(--muted);font-weight:700}
.table-card{overflow:auto}
.table tr:hover td{background:#121a27}
html[data-theme="light"] .table tr:hover td{background:#eef2ff}

.chips{display:flex;flex-wrap:wrap;gap:6px}
.chips .chip{
  background:var(--chip);border:1px solid var(--border);color:var(--muted);
  padding:4px 8px;border-radius:999px;font-size:12px
}
.chips.pill .chip{background:transparent}

.notice{
  border-left:3px solid var(--accent-2);padding:10px 12px;border-radius:8px;background:#0f1624;
  color:var(--muted)
}
html[data-theme="light"] .notice{background:#f1f5f9}

details.card summary{cursor:pointer;list-style:none}
details.card summary::-webkit-details-marker{display:none}
details.card[open] {box-shadow: 0 6px 20px rgba(0,0,0,.25)}

.segmented{display:flex;border:1px solid var(--border);border-radius:10px;overflow:hidden}
.segmented button{all:unset; padding:8px 10px; cursor:pointer; color:var(--muted)}
.segmented button:hover{background:var(--chip)}
.segmented button.active{color:var(--text); background: linear-gradient(180deg, color-mix(in srgb, var(--acc) 12%, transparent), transparent)}

mark{background: color-mix(in srgb, var(--acc) 35%, transparent); color: inherit; padding:0 .2em;border-radius:4px}

/* Toast */
#toast{
  position:fixed;left:50%;transform:translateX(-50%) translateY(20px);
  bottom:24px;background:linear-gradient(180deg, var(--acc), var(--acc-2));color:#0b1020;
  padding:10px 14px;border-radius:12px;box-shadow: var(--shadow);opacity:0;pointer-events:none;transition:.25s ease
}
#toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* Bullets */
.bullet-grid{display:grid;gap:8px;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));padding-left:16px}

/* Responsive */
@media (max-width: 980px){
  .app-shell{grid-template-columns:1fr}
  .sidebar{position:static;height:auto}
  .sidebar .collapse{display:inline-flex}
  .hero{margin:12px}
  .content{padding:12px}
}