/* ==========================================================================
   BeyondTheFirewall — site.css
   Shared design tokens, base layout and the responsive header/nav.
   Loaded on every page, after assets/css/main.css.
   ========================================================================== */

:root {
  /* Colour palette */
  --bg: #17171a;
  --surface: #212125;
  --surface-alt: #26262b;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.16);
  --text: #eceef0;
  --text-muted: #aaabb3;
  --text-faint: #7d7e86;
  --accent: #3d8bfd;
  --accent-strong: #63a4ff;
  --heading: #9bcdf0;
  --heading-strong: #5fb0e8;
  --danger: #ef5350;
  --success: #66bb6a;
  --warning: #ffd600;

  /* Shape + elevation */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.28);
  --shadow-md: 0 10px 28px rgba(0, 0, 0, 0.38);

  /* Spacing + sizing */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.25rem;
  --space-5: 3.5rem;
  --page-max: 1200px;
  --read-max: 920px;
  --gutter: clamp(1rem, 4vw, 2.5rem);
  --header-h: 4.25rem;

  --transition: 200ms ease;
}

/* --------------------------------------------------------------------
   Base
   -------------------------------------------------------------------- */
html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 1rem);
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: clamp(15.5px, 0.4vw + 14.5px, 17px);
}

img {
  max-width: 100%;
  height: auto;
}

a {
  color: var(--accent);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--accent-strong);
  outline-offset: 3px;
  border-radius: 3px;
}

::selection {
  background: var(--accent);
  color: #0b0b0d;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* --------------------------------------------------------------------
   Page shell
   -------------------------------------------------------------------- */
#wrapper {
  max-width: 100%;
  margin: 0 auto;
}

#main {
  width: 100%;
  max-width: var(--page-max);
  margin: 0 auto;
}

.inner {
  padding: 0 var(--gutter) var(--space-5);
}

/* --------------------------------------------------------------------
   Header / navigation
   -------------------------------------------------------------------- */
#header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  min-height: var(--header-h);
  padding: 0 var(--gutter);
  margin: 0 calc(var(--gutter) * -1) var(--space-3);
  border-bottom: 1px solid var(--border);
  background: rgba(23, 23, 26, 0.86);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  max-width: var(--page-max);
  margin: 0 auto;
  position: relative;
}

.header-links {
  display: flex;
  align-items: center;
  gap: clamp(1.1rem, 2.5vw, 2.5rem);
}

.header-links a {
  white-space: nowrap;
  font-size: 1.05em;
  color: var(--text);
  text-decoration: none;
  padding: 0.35rem 0.1rem;
  border-bottom: 2px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}

.header-links a:hover,
.header-links a:focus-visible {
  color: var(--accent-strong);
}

.header-links a[aria-current="page"] {
  color: var(--accent-strong);
  border-bottom-color: var(--accent);
}

.header-content > .icons {
  list-style-type: none;
  padding: 0;
  margin: 0;
  display: flex;
  gap: 1.1rem;
}

.header-content > .icons a {
  font-size: 1.5em;
  color: var(--text-muted);
  transition: color var(--transition);
}

/* Lets a plain inline <svg> brand icon (for logos Font Awesome doesn't
   have, e.g. Letterboxd) sit in the icon list and inherit color/hover
   exactly like the Font Awesome glyphs above. Just give the <svg> a
   fill="currentColor" path and drop it in — no extra class needed. */
.header-content > .icons a svg {
  width: 1em;
  height: 1em;
  vertical-align: -0.15em;
  fill: currentColor;
}

.header-content > .icons a:hover,
.header-content > .icons a:focus-visible {
  color: var(--accent-strong);
}

/* Hamburger toggle — hidden on wide viewports */
.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  margin-left: var(--space-2);
  padding: 0;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--surface);
  cursor: pointer;
  flex: 0 0 auto;
}

.nav-toggle .bar {
  position: relative;
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text);
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle .bar::before,
.nav-toggle .bar::after {
  content: '';
  position: absolute;
  left: 0;
  width: 20px;
  height: 2px;
  background: var(--text);
  transition: transform var(--transition), top var(--transition), opacity var(--transition);
}

.nav-toggle .bar::before {
  top: -6px;
}

.nav-toggle .bar::after {
  top: 6px;
}

#header.nav-open .nav-toggle .bar {
  background: transparent;
}

#header.nav-open .nav-toggle .bar::before {
  top: 0;
  transform: rotate(45deg);
}

#header.nav-open .nav-toggle .bar::after {
  top: 0;
  transform: rotate(-45deg);
}

@media screen and (max-width: 760px) {
  #header {
    align-items: stretch;
    flex-direction: column;
    padding: 0.85rem var(--gutter);
  }

  .header-content {
    flex-wrap: wrap;
    row-gap: 0.75rem;
  }

  .header-content > .icons {
    order: 2;
  }

  .nav-toggle {
    display: inline-flex;
    order: 3;
  }

  .header-links {
    order: 4;
    flex-basis: 100%;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition);
  }

  .header-links a {
    width: 100%;
    padding: 0.6rem 0.1rem;
    border-bottom: 1px solid var(--border);
  }

  #header.nav-open .header-links {
    max-height: 20rem;
  }
}

/* --------------------------------------------------------------------
   Small helpers reused across pages
   -------------------------------------------------------------------- */
.content {
  color: var(--text);
}

code {
  background-color: var(--surface-alt);
  border: 1px solid var(--border-strong);
  border-radius: 4px;
  padding: 2px 6px;
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  font-size: 0.92em;
  white-space: pre-wrap;
  word-break: break-word;
}

pre {
  background-color: #1c1c20;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: var(--space-2);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

pre code {
  background: none;
  border: none;
  padding: 0;
  white-space: pre;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-2) 0;
}

th,
td {
  border: 1px solid var(--border-strong);
  padding: 10px;
  text-align: left;
}

th {
  background-color: var(--surface-alt);
}