@import url("https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600;700;800;900&family=Space+Grotesk:wght@500;700&display=swap");

:root {
  --bg: #ffffff;
  --surface: #ffffff;
  --text: #0a0a0a;
  --muted: #737373;
  --border: #e5e5e5;
  --primary: #171717;
  --on-primary: #fafafa;
  --danger: #dc2626;
  --danger-bg: #fef2f2;
  --danger-border: #fecaca;
  --danger-text: #b91c1c;
  --ok: #16a34a;
  --shadow: 0 16px 34px rgba(0, 0, 0, 0.08);
  --radius: 12px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0a0a0a;
    --surface: #141414;
    --text: #fafafa;
    --muted: #a3a3a3;
    --border: #262626;
    --primary: #fafafa;
    --on-primary: #0a0a0a;
    --danger: #ef4444;
    --danger-bg: #3a0d10;
    --danger-border: #7f1d1d;
    --danger-text: #fecaca;
    --ok: #22c55e;
    --shadow: 0 20px 44px rgba(0, 0, 0, 0.45);
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(circle at 10% 5%, rgba(127, 127, 127, 0.08), transparent 45%), var(--bg);
  color: var(--text);
  font-family: "Manrope", "Avenir Next", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 17px;
}

body.center-page {
  display: grid;
  place-items: center;
  padding: 24px;
}

main.page {
  width: min(900px, 100%);
  margin: 0 auto;
  padding: 26px 20px 56px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
  flex-wrap: wrap;
}

.brand {
  margin: 0;
  font-size: clamp(2.1rem, 5vw, 3.4rem);
  font-weight: 900;
  letter-spacing: -0.06em;
  line-height: 1;
  font-family: "Space Grotesk", "Manrope", sans-serif;
}

.card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  padding: 22px;
}

.nav {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 14px;
  font-size: 0.98rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--text);
  background: transparent;
  transition: transform 0.16s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn.primary {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--on-primary);
}

h1.page-title {
  margin: 0;
  font-size: clamp(1.5rem, 2.6vw, 2.15rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  font-family: "Space Grotesk", "Manrope", sans-serif;
}

h2.section-title {
  margin: 20px 0 8px;
  font-size: 1.12rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  font-family: "Space Grotesk", "Manrope", sans-serif;
}

p {
  margin: 0;
  line-height: 1.55;
  color: var(--muted);
}

ul {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 7px;
}

li {
  line-height: 1.6;
  color: var(--muted);
}

.stack {
  display: grid;
  gap: 12px;
}

.effective {
  margin-top: 8px;
}

.inline-link {
  color: inherit;
  text-decoration-thickness: 1px;
}

.warn {
  border: 1px solid var(--danger-border);
  background: var(--danger-bg);
  color: var(--danger-text);
  border-radius: 10px;
  padding: 12px;
  font-weight: 600;
}

.action {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}

button.primary-action {
  border: 1px solid var(--primary);
  border-radius: 10px;
  padding: 11px 16px;
  font-size: 1rem;
  font-weight: 700;
  background: var(--primary);
  color: var(--on-primary);
  cursor: pointer;
  font-family: inherit;
}

button.primary-action:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

#status.ok {
  color: var(--ok);
  font-weight: 600;
}

#status.err {
  color: var(--danger);
  font-weight: 600;
}

@keyframes wobbly-move {
  0% { transform: translate(0, 0) rotate(0deg); }
  33% { transform: translate(-0.8px, 0.5px) rotate(-0.005rad); }
  66% { transform: translate(0.5px, -0.8px) rotate(0.008rad); }
  100% { transform: translate(0, 0) rotate(0deg); }
}

.wobbly-letter {
  display: inline-block;
  animation: wobbly-move 12s ease-in-out infinite;
}