/* Shared typography, navigation, controls, and layout primitives for all pages. */
@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600&family=Space+Grotesk:wght@400;500;600;700&display=swap');

:root {
  color-scheme: light;
  --ink: #14212a;
  --muted: #64727b;
  --paper: #eef2f3;
  --panel: #ffffff;
  --accent: #087f8c;
  --accent-dark: #075c67;
  --line: #cdd8dc;
  --radius-sm: 4px;
  --radius: 8px;
  font-family: "Space Grotesk", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; background: var(--paper); color: var(--ink); }
.page-shell { width: min(1040px, calc(100% - 40px)); min-height: 100vh; margin: 0 auto; }
.site-nav, .site-footer { display: flex; align-items: center; justify-content: space-between; padding: 18px 0; font-family: "IBM Plex Mono", monospace; }
.brand { color: var(--ink); font-size: 1rem; font-weight: 700; text-decoration: none; }
.nav-actions, .hero-actions { display: flex; align-items: center; gap: 14px; }
.session-actions { display: flex; align-items: center; gap: 16px; }
.session-countdown, .account-email { color: var(--muted); font-family: "IBM Plex Mono", monospace; font-size: 0.75rem; }
.nav-link, .nav-button, .secondary-link { color: var(--muted); font-size: 0.82rem; text-decoration: none; }
.nav-button, .secondary-link { padding: 9px 12px; border: 1px solid var(--line); border-radius: var(--radius-sm); color: var(--ink); }
.nav-logout { background: transparent; cursor: pointer; font: inherit; }
.nav-link:hover, .nav-link:focus-visible, .nav-button:hover, .nav-button:focus-visible, .secondary-link:hover, .secondary-link:focus-visible { border-color: var(--accent); color: var(--accent-dark); }
h1, h2, p { margin-top: 0; }
h1 { max-width: 700px; margin-bottom: 18px; font-size: clamp(2.8rem, 6vw, 5.8rem); font-weight: 600; line-height: 0.98; }
.primary-link { justify-self: start; padding: 12px 16px; border: 1px solid var(--accent); border-radius: var(--radius-sm); background: var(--accent); color: white; font-family: "IBM Plex Mono", monospace; font-size: 0.82rem; font-weight: 600; text-decoration: none; }
.primary-link:hover, .primary-link:focus-visible { background: var(--accent-dark); border-color: var(--accent-dark); }
.auth-message { min-height: 1.3em; margin: 16px 0 0; color: var(--accent-dark); font-family: "IBM Plex Mono", monospace; font-size: 0.78rem; }
.auth-message.is-error { color: #b42318; }
.is-hidden { display: none; }
.site-footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 0.75rem; }

@keyframes rise-in { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

@media (max-width: 700px) {
  .page-shell { width: min(100% - 24px, 560px); }
  .site-nav { padding: 14px 0; }
  .nav-button { font-size: 0.75rem; }
}