/* ==========================================================================
   styles.css — shared stylesheet
   Loaded by every page, including nav-bar.html once it's injected.
   Edit the variables in :root to retheme the whole site.
   ========================================================================== */

:root {
  /* -- palette -- */
  --color-bg: #0f1114;
  --color-surface: #171a1f;
  --color-border: #2a2e35;
  --color-text: #e6e6e0;
  --color-text-dim: #9a9da3;
  --color-accent: #d98c2b;
  --color-accent-hover: #f0a23e;

  /* -- type -- */
  --font-body: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
  --font-size-base: 16px;
  --line-height-base: 1.6;

  /* -- layout -- */
  --max-width: 1100px;
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --nav-height: 64px;
  --radius: 4px;
}

/* -- reset -- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: var(--font-size-base);
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  line-height: var(--line-height-base);
  min-height: 100vh;
}

a {
  color: var(--color-accent);
  text-decoration: none;
}

a:hover,
a:focus-visible {
  color: var(--color-accent-hover);
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

img {
  max-width: 100%;
  display: block;
}

/* ==========================================================================
   Navbar
   ========================================================================== */

.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-height);
  background: rgba(15, 17, 20, 0.9);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--color-border);
}

.site-nav__inner {
  max-width: var(--max-width);
  height: 100%;
  margin: 0 auto;
  padding: 0 var(--space-3);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-nav__brand {
  color: var(--color-text);
  font-weight: 600;
  letter-spacing: 0.02em;
  font-size: 1.05rem;
}

.site-nav__brand:hover {
  color: var(--color-accent);
}

.site-nav__links {
  list-style: none;
  display: flex;
  gap: var(--space-3);
}

.site-nav__links a {
  color: var(--color-text-dim);
  font-size: 0.9rem;
  padding: var(--space-1) 0;
  border-bottom: 2px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}

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

.site-nav__links a.is-active {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

/* mobile toggle, hidden on desktop */
.site-nav__toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-1);
}

.site-nav__toggle span {
  width: 22px;
  height: 2px;
  background: var(--color-text);
  display: block;
}

@media (max-width: 640px) {
  .site-nav__toggle {
    display: flex;
  }

  .site-nav__links {
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    gap: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.2s ease;
  }

  .site-nav__links.is-open {
    max-height: 60vh;
  }

  .site-nav__links li {
    border-top: 1px solid var(--color-border);
  }

  .site-nav__links a {
    display: block;
    padding: var(--space-2) var(--space-3);
    border-bottom: none;
  }

  .site-nav__links a.is-active {
    background: var(--color-bg);
  }
}

/* ==========================================================================
   Page shell — generic scaffolding, replace with real content per page
   ========================================================================== */

.page-main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-4) var(--space-3);
  min-height: calc(100vh - var(--nav-height));
}

.page-header {
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-border);
}

.page-header h1 {
  font-size: 1.8rem;
  font-weight: 600;
}

.page-header p {
  color: var(--color-text-dim);
  margin-top: var(--space-1);
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-3);
}

.site-footer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-3);
  color: var(--color-text-dim);
  font-size: 0.85rem;
  border-top: 1px solid var(--color-border);
}