/* Global visual refresh without changing functionality */

/* CSS Reset (minimal) */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; color-scheme: light dark; }
body { margin: 0; }

/* Theme */
:root {
  --bg: #f7f8fb;
  --surface: #ffffff;
  --text: #111827;
  --muted: #6b7280;
  --border: #e5e7eb;
  --accent: #0ea5e9;
  --accent-contrast: #ffffff;
  --radius: 12px;
  --shadow: 0 10px 20px rgba(2, 6, 23, 0.06);
  --maxw: 980px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1220;
    --surface: #0f172a;
    --text: #e5e7eb;
    --muted: #94a3b8;
    --border: #1f2937;
    --accent: #38bdf8;
    --accent-contrast: #061318;
    --shadow: 0 10px 25px rgba(0, 0, 0, 0.35);
  }
}

/* Base */
body {
  min-height: 100svh;
  background: radial-gradient(1200px 800px at 10% -10%, rgba(56, 189, 248, 0.08), transparent 60%),
              radial-gradient(900px 700px at 110% 10%, rgba(14, 165, 233, 0.08), transparent 60%),
              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";
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main.container {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: 24px;
  display: grid;
  gap: 24px;
  justify-items: center;
  text-align: center;
}

.site-header { text-align: center; }
.site-header h1 {
  margin: 0;
  font-size: clamp(28px, 2.4vw + 16px, 40px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  background: linear-gradient(90deg, var(--text), color-mix(in oklab, var(--text) 70%, var(--accent)));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.site-header p.muted {
  margin: 4px 0 0 0;
  color: var(--muted);
}

/* Cards and layout */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  width: min(100%, 780px);
  margin-inline: auto;
}

.stack > * + * { margin-top: 12px; }

section > h2 {
  margin-top: 0;
  font-size: 18px;
}

/* Links */
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Navigation */
.nav { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; }
.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--surface) 85%, var(--bg));
}
.nav-link:hover { border-color: color-mix(in oklab, var(--border) 40%, var(--accent)); }

/* Forms */
label { font-weight: 600; font-size: 14px; color: var(--muted); display: block; }
input[type="password"], input[type="search"] {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--surface) 92%, var(--bg));
  color: var(--text);
}
input::placeholder { color: color-mix(in oklab, var(--muted) 60%, transparent); }
input:focus { outline: 3px solid color-mix(in oklab, var(--accent) 25%, transparent); border-color: var(--accent); }

/* Buttons */
button, .btn {
  appearance: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--surface) 92%, var(--bg));
  color: var(--text);
  cursor: pointer;
  transition: transform 0.05s ease, background 0.2s ease, border-color 0.2s ease;
}
button:hover, .btn:hover { border-color: color-mix(in oklab, var(--border) 40%, var(--accent)); }
button:active, .btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--accent);
  color: var(--accent-contrast);
  border-color: color-mix(in oklab, var(--accent) 60%, var(--border));
}
.btn-primary:hover { filter: brightness(1.05); }

.btn-ghost { background: transparent; }

/* Lists */
ul { list-style: none; padding-left: 0; margin: 0; }
.list-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 10px;
}

.list-grid li a {
  display: block;
  padding: 10px 12px;
  background: color-mix(in oklab, var(--surface) 92%, var(--bg));
  border: 1px solid var(--border);
  border-radius: 10px;
  text-decoration: none;
}
.list-grid li a:hover { border-color: color-mix(in oklab, var(--border) 40%, var(--accent)); }

/* Helpers */
.muted { color: var(--muted); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

/* Accessibility */
:focus-visible {
  outline: 3px solid color-mix(in oklab, var(--accent) 40%, transparent);
  outline-offset: 2px;
}