/* ---------------------------------------------------------------
 * WhiteLabelGym — baseline stylesheet
 * Swap the values in :root and [data-theme="dark"] to rebrand.
 * ------------------------------------------------------------- */

:root {
  --color-bg: #f5f5f4;
  --color-surface: #ffffff;
  --color-nav-bg: #ffffff;
  --color-text: #18181b;
  --color-text-muted: #71717a;
  --color-accent: #dc2626;
  --color-accent-hover: #b91c1c;
  --color-border: #e5e7eb;
  --color-hover: rgba(0, 0, 0, 0.05);
  --shadow-nav: 0 1px 0 rgba(0, 0, 0, 0.04);

  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --max-content: 1100px;
  --nav-height: 72px;
  --radius-card: 16px;
  --radius-button: 10px;
  --radius-control: 8px;
}

[data-theme="dark"] {
  --color-bg: #09090b;
  --color-surface: #18181b;
  --color-nav-bg: #18181b;
  --color-text: #fafafa;
  --color-text-muted: #a1a1aa;
  --color-accent: #ef4444;
  --color-accent-hover: #f87171;
  --color-border: #27272a;
  --color-hover: rgba(255, 255, 255, 0.07);
  --shadow-nav: 0 1px 0 rgba(255, 255, 255, 0.04);
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; }

/* ----- Navbar ----- */

.site-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 24px;
  height: var(--nav-height);
  padding: 0 32px;
  background: var(--color-nav-bg);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-nav);
}

.site-nav__logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  text-decoration: none;
}

.site-nav__logo img {
  display: block;
  max-height: 44px;
  width: auto;
}

.site-nav__links {
  display: flex;
  align-items: center;
  flex: 1;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav__links a {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border-radius: var(--radius-control);
  color: var(--color-text);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: -0.005em;
  transition: background 0.15s ease, color 0.15s ease;
}

.site-nav__links a:hover { background: var(--color-hover); }

.site-nav__links a[aria-current="page"] {
  color: var(--color-accent);
}

.site-nav__cta {
  display: inline-flex;
  align-items: center;
  padding: 10px 20px;
  border-radius: var(--radius-button);
  background: var(--color-accent);
  color: #ffffff;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: -0.005em;
  transition: background 0.15s ease, transform 0.05s ease;
}

.site-nav__cta:hover { background: var(--color-accent-hover); }
.site-nav__cta:active { transform: translateY(1px); }

.site-nav__theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-control);
  background: transparent;
  color: var(--color-text);
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.site-nav__theme-toggle:hover {
  background: var(--color-hover);
  border-color: var(--color-text-muted);
}

.site-nav__theme-toggle svg { display: block; }
.site-nav__theme-toggle .icon-light { display: none; }
[data-theme="dark"] .site-nav__theme-toggle .icon-dark { display: none; }
[data-theme="dark"] .site-nav__theme-toggle .icon-light { display: block; }

/* ----- Page content ----- */

#page {
  flex: 1;
  width: 100%;
  max-width: var(--max-content);
  margin: 0 auto;
  padding: 48px 32px;
}

.page__header {
  margin: 0 0 16px;
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.1;
}

/* ----- Responsive ----- */

@media (max-width: 900px) {
  .site-nav { padding: 0 20px; gap: 16px; }
  .site-nav__links { gap: 0; flex-wrap: wrap; }
  .site-nav__links a { padding: 6px 10px; font-size: 0.875rem; }
  .page { margin: 20px; padding: 32px; }
  .page__header { font-size: 2rem; }
}

@media (max-width: 600px) {
  /* TODO: replace with a hamburger menu */
  .site-nav__links { display: none; }
  .site-nav { gap: 12px; padding: 0 16px; }
  .page { padding: 24px; margin: 12px; }
}