:root {
  color-scheme: light;
  --bg: #f6f7fb;
  --bg-strong: #eef2ff;
  --ink: #14213d;
  --muted: #51607a;
  --panel: #ffffff;
  --panel-border: #dbe3ef;
  --panel-shadow: rgba(20, 33, 61, 0.08);
  --accent: #cc3300;
  --accent2: #f59e0b;
  --parallel: #009900;
  --sequential: #47476b;
  --reset: #e60000;
  --button-text: #ffffff;
  --status-bg: rgba(255, 255, 255, 0.88);
  --status-text: #0f172a;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --bg: #000000;
    --bg-strong: #0f172a;
    --ink: #e2e8f0;
    --muted: #94a3b8;
    --panel: #0e1625;
    --panel-border: rgba(148, 163, 184, 0.18);
    --panel-shadow: rgba(0, 0, 0, 0.36);
    --status-bg: rgba(15, 23, 42, 0.78);
    --status-text: #e2e8f0;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100svh;
  color: var(--ink);
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  background: radial-gradient(circle at 20% 0%, var(--bg-strong) 0, var(--bg) 55%);
}

.page {
  max-width: 1020px;
  margin: 32px auto;
  padding: 20px;
  display: grid;
  gap: 14px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 16px;
  box-shadow: 0 8px 24px var(--panel-shadow);
  overflow: hidden;
}

.panel-head {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px 8px;
}

.panel-logo {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--panel-border);
  display: block;
}

.panel-head-copy {
  min-width: 0;
}

.panel-head h1 {
  margin: 0 0 8px;
  font-size: 1.6rem;
  letter-spacing: 0.01em;
}

.panel-head p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.5;
}

.framework-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  padding: 14px;
  border-top: 1px solid var(--panel-border);
}

.framework-card {
  --framework-accent: var(--accent);
  border: 1px solid var(--panel-border);
  border-radius: 14px;
  padding: 14px;
  box-shadow: 0 8px 20px var(--panel-shadow);
  background: color-mix(in srgb, var(--panel) 94%, var(--bg) 6%);
  border-color: var(--framework-accent);
}

.framework-card[data-framework="vanilla"] {
  --framework-accent: color-mix(in srgb, #6666ff 46%, var(--panel-border) 54%);
}

.framework-card[data-framework="react"] {
  --framework-accent: color-mix(in srgb, #00bfff 46%, var(--panel-border) 54%);
}

.framework-card[data-framework="yew"] {
  --framework-accent: color-mix(in srgb, #cc3399 46%, var(--panel-border) 54%);
}

.framework-card[data-framework="leptos"] {
  --framework-accent: color-mix(in srgb, #ff3300 46%, var(--panel-border) 54%);
}

.framework-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.framework-logo {
  width: 22px;
  height: 22px;
  display: block;
}

.framework-card h2 {
  margin: 0;
  font-size: 1.1rem;
}

.framework-card p {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.45;
}

.card-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.framework-card .card-actions button {
  border: 1px solid rgba(15, 118, 110, 0.25);
  border-radius: 11px;
  padding: 10px 12px;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.015em;
  color: var(--button-text);
  background: var(--accent);
  cursor: pointer;
  transition: transform 120ms ease, box-shadow 120ms ease, filter 120ms ease;
}

.framework-card .card-actions button[data-action="demo"] {
  background: var(--framework-accent);
  border-color: var(--framework-accent);
}

.card-actions button[data-action="readme"] {
  background: transparent;
  color: var(--ink);
  border-color: var(--framework-accent);
}

.card-actions button:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 20px var(--panel-shadow);
  filter: saturate(1.05);
}

.card-actions button:focus-visible {
  outline: 2px solid rgba(15, 118, 110, 0.45);
  outline-offset: 2px;
}

.status {
  margin: 0;
  padding: 12px 14px 14px;
  color: var(--status-text);
  font-size: 0.92rem;
  background: var(--status-bg);
}

.hint {
  margin: 0;
  padding: 0 14px 16px;
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.4;
}

@media (max-width: 820px) {
  .panel-head {
    align-items: flex-start;
  }

  .panel-logo {
    width: 56px;
    height: 56px;
  }

  .framework-cards {
    grid-template-columns: 1fr;
  }

  .card-actions {
    grid-template-columns: 1fr;
  }
}