@import url("./tokens.css");

/* =========================
   RevLearning Tools — landing page
   Uses the shared slate design tokens (tokens.css).
   ========================= */

* { box-sizing: border-box; }

html, body { min-height: 100%; }

html {
  background: var(--bg);
}

body {
  margin: 0;
  min-height: 100vh;
  background: transparent;
  color: var(--text);
  font-family: var(--font);
  line-height: 1.45;
}

.app-shell {
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 24px;
}

/* Header */
.app-header {
  position: sticky;
  top: 0;
  z-index: 5;
  backdrop-filter: blur(14px);
  background: linear-gradient(to bottom, color-mix(in srgb, var(--bg) 86%, transparent), color-mix(in srgb, var(--bg) 55%, transparent));
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: var(--radius);
  background:
    radial-gradient(12px 12px at 30% 30%, rgba(255, 255, 255, 0.65), transparent 60%),
    var(--accent);
  box-shadow: var(--shadow);
  border: 1px solid var(--border-strong);
}

.brand-text h1 {
  font-size: 20px;
  margin: 0;
  letter-spacing: 0.2px;
}

.brand-text p {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 13px;
}

/* Intro */
.intro {
  padding-top: 26px;
}

.intro h2 {
  margin: 0 0 6px;
  font-size: 26px;
  letter-spacing: 0.2px;
}

.intro p {
  margin: 0;
  color: var(--muted);
  max-width: 60ch;
}

/* Grid of tool cards */
.tool-grid {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--gap);
}

.tool-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  text-decoration: none;
  color: inherit;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px;
  transition: transform 0.16s ease, border-color 0.16s ease, box-shadow 0.16s ease;
}

.tool-card:hover,
.tool-card:focus-visible {
  transform: translateY(-3px);
  border-color: var(--focus);
  box-shadow: none;
  outline: none;
}

.tool-card h3 {
  margin: 0;
  font-size: 16px;
  letter-spacing: 0.2px;
}

.tool-card p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.tool-card .go {
  margin-top: auto;
  padding-top: 10px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
}

/* Footer */
.app-footer {
  padding: 28px 0 8px;
  color: var(--muted);
  font-size: 13px;
}