/* Day (default) */
:root {
  --bg: #9a9282;
  --bg-mud: #7d7668;
  --bg-dust: #b0a894;
  --text: #0d0c0a;
  --text-light: #ebe4d6;
  --muted: #2a2722;
  --rust: #6b2d0f;
  --rust-hot: #c45a18;
  --rust-mid: #8f3f12;
  --steel-dark: #1a1814;
  --steel: #3d3a34;
  --hazard: #d4a017;
  --html-bg: #1a1814;
  --max: 720px;
  --topbar-h: 64px;

  --floor-line: rgba(13, 12, 10, 0.14);
  --floor-scratch: rgba(13, 12, 10, 0.04);
  --floor-rust-glow: rgba(196, 90, 24, 0.12);
  --floor-shadow: rgba(13, 12, 10, 0.28);
  --floor-grit: rgba(13, 12, 10, 0.1);

  --corrugated-base: #3a3832;
  --corrugated-1: #4e4a42;
  --corrugated-2: #2e2c28;
  --corrugated-3: #1a1814;
  --corrugated-4: #3f3c36;
  --corrugated-5: #2a2824;
  --corrugated-shine: rgba(255, 255, 255, 0.1);
  --corrugated-shade: rgba(0, 0, 0, 0.35);
  --corrugated-border: #0d0c0a;
  --corrugated-drop: rgba(13, 12, 10, 0.4);

  --plate-top: #8a8374;
  --plate-bot: #6e685c;
  --plate-inset-hi: rgba(255, 255, 255, 0.12);
  --plate-inset-lo: rgba(0, 0, 0, 0.25);
  --plate-glow: transparent;
  --rivet-hi: #c4bdae;
  --rivet-mid: #5a564c;

  --nav-link: #d6cfc0;
  --nav-btn-bg: rgba(13, 12, 10, 0.25);
  --nav-btn-hover: rgba(13, 12, 10, 0.45);
  --nav-active-text: var(--text);

  --page-bg-a: rgba(232, 224, 208, 0.55);
  --page-bg-b: rgba(168, 159, 140, 0.9);
  --page-inset: rgba(255, 255, 255, 0.15);
  --page-drop: rgba(13, 12, 10, 0.35);
  --page-glow: transparent;

  --empty-stripe-a: rgba(212, 160, 23, 0.2);
  --empty-stripe-b: rgba(13, 12, 10, 0.06);
  --empty-drop: rgba(13, 12, 10, 0.2);
  --btn-shine: rgba(255, 220, 160, 0.25);
  --knob-night: linear-gradient(180deg, #e8e0d2 0%, #9a9488 100%);
}

/* Night */
html[data-theme="night"] {
  --bg: #141311;
  --bg-mud: #0c0b0a;
  --bg-dust: #1c1a17;
  --text: #e8e0d2;
  --text-light: #f3ecdf;
  --muted: #a89f8e;
  --rust: #4a1f0a;
  --rust-hot: #e07028;
  --rust-mid: #b85018;
  --steel-dark: #050504;
  --steel: #2a2620;
  --hazard: #e0a820;
  --html-bg: #050504;

  --floor-line: rgba(224, 168, 32, 0.06);
  --floor-scratch: rgba(255, 255, 255, 0.02);
  --floor-rust-glow: rgba(224, 112, 40, 0.1);
  --floor-shadow: rgba(0, 0, 0, 0.55);
  --floor-grit: rgba(224, 168, 32, 0.04);

  --corrugated-base: #12100e;
  --corrugated-1: #2a2622;
  --corrugated-2: #0e0c0a;
  --corrugated-3: #050403;
  --corrugated-4: #1c1916;
  --corrugated-5: #0a0908;
  --corrugated-shine: rgba(224, 168, 32, 0.08);
  --corrugated-shade: rgba(0, 0, 0, 0.55);
  --corrugated-border: #000;
  --corrugated-drop: rgba(0, 0, 0, 0.65);

  --plate-top: #2c2924;
  --plate-bot: #1a1814;
  --plate-inset-hi: rgba(224, 168, 32, 0.1);
  --plate-inset-lo: rgba(0, 0, 0, 0.45);
  --plate-glow: rgba(224, 168, 32, 0.06);
  --rivet-hi: #6a6458;
  --rivet-mid: #2a2620;

  --nav-link: #b8b09e;
  --nav-btn-bg: rgba(0, 0, 0, 0.45);
  --nav-btn-hover: rgba(0, 0, 0, 0.65);
  --nav-active-text: #0d0c0a;

  --page-bg-a: rgba(36, 32, 28, 0.95);
  --page-bg-b: rgba(22, 20, 17, 0.98);
  --page-inset: rgba(224, 168, 32, 0.08);
  --page-drop: rgba(0, 0, 0, 0.55);
  --page-glow: rgba(224, 112, 40, 0.06);

  --empty-stripe-a: rgba(224, 168, 32, 0.12);
  --empty-stripe-b: rgba(0, 0, 0, 0.25);
  --empty-drop: rgba(0, 0, 0, 0.35);
  --btn-shine: rgba(255, 200, 120, 0.2);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Arial Narrow", "Franklin Gothic Medium", "Segoe UI", system-ui, sans-serif;
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  background-color: var(--bg);
  background-image:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 47px,
      var(--floor-line) 47px,
      var(--floor-line) 48px
    ),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 47px,
      var(--floor-line) 47px,
      var(--floor-line) 48px
    ),
    repeating-linear-gradient(
      125deg,
      transparent 0 2px,
      var(--floor-scratch) 2px 3px
    ),
    radial-gradient(ellipse 50% 40% at 15% 20%, var(--floor-rust-glow), transparent 55%),
    radial-gradient(ellipse 60% 45% at 85% 75%, var(--floor-shadow), transparent 50%),
    radial-gradient(circle at 40% 60%, var(--floor-grit) 0 1px, transparent 2px),
    linear-gradient(160deg, var(--bg-dust) 0%, var(--bg) 40%, var(--bg-mud) 100%);
  background-size: auto, auto, auto, auto, auto, 6px 6px, auto;
}

/* Night floor: warmer lamp pools (same look as before) */
html[data-theme="night"] body {
  background-image:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 47px,
      var(--floor-line) 47px,
      var(--floor-line) 48px
    ),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 47px,
      var(--floor-line) 47px,
      var(--floor-line) 48px
    ),
    radial-gradient(ellipse 70% 55% at 50% 0%, rgba(224, 168, 32, 0.09), transparent 55%),
    radial-gradient(ellipse 45% 35% at 20% 80%, rgba(224, 112, 40, 0.07), transparent 50%),
    radial-gradient(ellipse 60% 45% at 85% 75%, var(--floor-shadow), transparent 50%),
    linear-gradient(160deg, var(--bg-dust) 0%, var(--bg) 40%, var(--bg-mud) 100%);
  background-size: auto;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
  color: inherit;
  cursor: pointer;
  border: none;
  background: none;
  padding: 0;
}

/* Top bar — corrugated iron */
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  height: var(--topbar-h);
  background-color: var(--corrugated-base);
  background-image:
    linear-gradient(
      180deg,
      var(--corrugated-shine) 0%,
      transparent 35%,
      var(--corrugated-shade) 100%
    ),
    repeating-linear-gradient(
      180deg,
      var(--corrugated-1) 0px,
      var(--corrugated-2) 3px,
      var(--corrugated-3) 6px,
      var(--corrugated-4) 9px,
      var(--corrugated-5) 12px
    );
  border-bottom: 4px solid var(--corrugated-border);
  box-shadow:
    inset 0 2px 0 var(--corrugated-shine),
    0 10px 0 var(--corrugated-drop);
}

.topbar-inner {
  position: relative;
  max-width: var(--max);
  height: calc(100% - 10px);
  margin: 5px auto 0;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  background: linear-gradient(180deg, var(--plate-top) 0%, var(--plate-bot) 100%);
  border: 3px solid var(--steel-dark);
  box-shadow:
    inset 0 2px 0 var(--plate-inset-hi),
    inset 0 -2px 0 var(--plate-inset-lo),
    0 0 20px var(--plate-glow);
}

.topbar-inner::before,
.topbar-inner::after {
  content: "";
  position: absolute;
  top: 50%;
  width: 12px;
  height: 12px;
  margin-top: -6px;
  border-radius: 50%;
  border: 2px solid var(--steel-dark);
  background: radial-gradient(circle at 30% 30%, var(--rivet-hi), var(--rivet-mid) 45%, #1a1814 78%);
  box-shadow: 1px 1px 0 rgba(0, 0, 0, 0.45);
}

.topbar-inner::before {
  left: 0.55rem;
}

.topbar-inner::after {
  right: 0.55rem;
}

.logo {
  flex-shrink: 0;
  font-weight: 900;
  font-size: 1.05rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  white-space: nowrap;
  color: var(--text-light);
  text-shadow: 0 1px 0 #000, 2px 2px 0 rgba(0, 0, 0, 0.45);
}

.topbar-tools {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  min-width: 0;
}

.nav {
  display: flex;
  gap: 0.35rem;
}

.nav a {
  padding: 0.45rem 0.7rem;
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--nav-link);
  border: 2px solid transparent;
  background: var(--nav-btn-bg);
}

.nav a:hover {
  color: var(--text-light);
  border-color: var(--steel-dark);
  background: var(--nav-btn-hover);
}

.nav a.is-active {
  color: var(--nav-active-text);
  background: var(--hazard);
  border-color: var(--steel-dark);
  box-shadow: 3px 3px 0 var(--steel-dark);
}

/* Theme switch */
.theme-switch {
  position: relative;
  flex-shrink: 0;
  width: 3.55rem;
  height: 1.7rem;
  border: 2px solid var(--steel-dark);
  background: var(--nav-btn-bg);
  box-shadow: 2px 2px 0 rgba(0, 0, 0, 0.35);
}

.theme-switch:hover {
  background: var(--nav-btn-hover);
}

.theme-switch:focus-visible {
  outline: 2px solid var(--hazard);
  outline-offset: 2px;
}

.theme-switch-icon {
  position: absolute;
  top: 50%;
  z-index: 2;
  width: 0.8rem;
  height: 0.8rem;
  margin-top: -0.4rem;
  color: var(--nav-link);
  opacity: 0.5;
  pointer-events: none;
  transition: opacity 0.15s ease, color 0.15s ease;
}

.theme-switch-icon svg {
  display: block;
  width: 100%;
  height: 100%;
  fill: currentColor;
}

.theme-switch-sun {
  left: 0.22rem;
}

.theme-switch-moon {
  right: 0.22rem;
}

.theme-switch-knob {
  position: absolute;
  top: 50%;
  left: 0.16rem;
  z-index: 1;
  width: 1.2rem;
  height: 1.2rem;
  margin-top: -0.6rem;
  border: 2px solid var(--steel-dark);
  background: linear-gradient(180deg, var(--hazard) 0%, #b8860b 100%);
  box-shadow: 1px 1px 0 rgba(0, 0, 0, 0.35);
  transition: left 0.18s ease, background 0.18s ease;
}

html:not([data-theme="night"]) .theme-switch-sun {
  color: #1a1814;
  opacity: 1;
}

html[data-theme="night"] .theme-switch-knob {
  left: calc(100% - 1.2rem - 0.16rem);
  background: var(--knob-night);
}

html[data-theme="night"] .theme-switch-moon {
  color: #1a1814;
  opacity: 1;
}

/* Page plate */
.page {
  max-width: var(--max);
  margin: 1.75rem auto 3rem;
  padding: 1.75rem 1.35rem 2.25rem;
  background: linear-gradient(165deg, var(--page-bg-a) 0%, var(--page-bg-b) 100%);
  border: 4px solid var(--steel-dark);
  box-shadow:
    inset 0 0 0 1px var(--page-inset),
    8px 8px 0 var(--page-drop),
    0 0 0 1px var(--steel),
    0 0 40px var(--page-glow);
}

.page h1 {
  margin: 0 0 1.1rem;
  padding: 0.55rem 0.75rem;
  font-size: clamp(1.65rem, 4.5vw, 2.15rem);
  font-weight: 900;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  line-height: 1.2;
  color: var(--text-light);
  background: var(--steel-dark);
  border-left: 10px solid var(--rust-hot);
  box-shadow: 4px 4px 0 var(--rust);
}

.page p {
  margin: 0 0 1.25rem;
  max-width: 36rem;
  color: var(--muted);
  font-size: 1.08rem;
  font-weight: 600;
  line-height: 1.7;
  letter-spacing: 0.01em;
}

.page p:last-child {
  margin-bottom: 0;
}

.empty-note {
  margin: 0;
  padding: 1rem 1.1rem;
  max-width: 24rem;
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: 3px dashed var(--steel-dark);
  background: repeating-linear-gradient(
    -45deg,
    var(--empty-stripe-a),
    var(--empty-stripe-a) 8px,
    var(--empty-stripe-b) 8px,
    var(--empty-stripe-b) 16px
  );
  box-shadow: 4px 4px 0 var(--empty-drop);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.75rem 1.35rem;
  border: 3px solid var(--steel-dark);
  border-radius: 0;
  background: linear-gradient(180deg, var(--rust-hot) 0%, var(--rust-mid) 48%, var(--rust) 100%);
  color: var(--text-light);
  font-size: 0.95rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  box-shadow:
    inset 0 2px 0 var(--btn-shine),
    5px 5px 0 var(--steel-dark);
}

.btn:hover {
  filter: brightness(1.08);
  transform: translate(-1px, -1px);
  box-shadow:
    inset 0 2px 0 var(--btn-shine),
    6px 6px 0 var(--steel-dark);
}

@media (max-width: 560px) {
  .logo {
    font-size: 0.85rem;
    letter-spacing: 0.08em;
  }

  .nav a {
    padding: 0.4rem 0.45rem;
    font-size: 0.68rem;
    letter-spacing: 0.06em;
  }

  .theme-switch {
    width: 3.1rem;
    height: 1.55rem;
  }
}