/* ============================================================
   CIEL · THE TECH HANDYMAN — BASE & GLOBAL THEME
   File: base.css
   ============================================================ */

/* ---------- 1. Color & Theme Tokens ---------- */
:root {
  /* Default: Dark Workbench Theme */
  --bg: #081120;
  --bg2: #0A1526;
  --panel: #0E1B36;
  --panel2: #122244;
  --line: rgba(151, 183, 255, 0.16);
  --line-soft: rgba(151, 183, 255, 0.09);

  --paper: #F2EEE3;
  --fog: #C7D4F1;
  --dim: #8FA3C9;

  --amber: #FFB020;
  --ambersoft: #FFD27A;
  --mint: #3DDC97;
  --alarm: #FF5D5D;
  --sky: #57A8FF;
  --blurple: #5865F2;
  --fb-blue: #1877F2;

  --display: 'Big Shoulders Display', 'Arial Narrow', Impact, sans-serif;
  --body: 'Atkinson Hyperlegible', 'Trebuchet MS', Verdana, sans-serif;
  --mono: ui-monospace, 'Cascadia Mono', Consolas, 'Courier New', monospace;

  /* Font size controlled by dropdown */
  --base-font-size: 17px;
  --base-line-height: 1.55;

  /* Accessible Focus Ring */
  --focus-ring-color: var(--amber);
  --focus-ring-width: 3px;
  --focus-ring-offset: 3px;
}

/* ---------- 2. Light Drafting-Paper Theme ---------- */
[data-theme="light"] {
  --bg: #F4F6FB;
  --bg2: #E9EDF5;
  --panel: #FFFFFF;
  --panel2: #F0F3F9;
  --line: rgba(20, 35, 60, 0.14);
  --line-soft: rgba(20, 35, 60, 0.06);

  --paper: #121A26;
  --fog: #3B4B66;
  --dim: #60718D;

  --amber: #C67600; /* Darker amber for WCAG 4.5:1 on light */
  --ambersoft: #8F5500;
  --mint: #0E8F58;
  --alarm: #D92D20;
  --sky: #0969DA;

  --focus-ring-color: #C67600;
}

[data-theme="light"] .orb { opacity: 0.25; }
[data-theme="light"] header.site {
  background: linear-gradient(to bottom, rgba(244, 246, 251, 0.94) 60%, rgba(244, 246, 251, 0));
}

/* ---------- 3. Reset & Global Typography ---------- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  background: var(--bg);
  color: var(--paper);
  font-family: var(--body);
  line-height: var(--base-line-height);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.3s ease, color 0.3s ease;
}

::selection {
  background: var(--amber);
  color: #241a02;
}

a { color: inherit; }
img, svg { display: block; }
button, select { font-family: inherit; }

:focus-visible {
  outline: var(--focus-ring-width) solid var(--focus-ring-color);
  outline-offset: var(--focus-ring-offset);
}

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border-width: 0;
}

.skip {
  position: fixed; left: -999px; top: 10px; z-index: 200;
  background: var(--amber); color: #241a02; padding: .7em 1.2em; font-weight: 700; text-decoration: none;
}
.skip:focus { left: 10px; }

/* ---------- 4. Ambient Layers ---------- */
.bg-grid {
  position: fixed; inset: 0; z-index: -3;
  background-image:
    linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: radial-gradient(120% 90% at 50% 40%, #000 55%, transparent 100%);
  -webkit-mask-image: radial-gradient(120% 90% at 50% 40%, #000 55%, transparent 100%);
}
.bg-vignette {
  position: fixed; inset: 0; z-index: -2; pointer-events: none;
  background: radial-gradient(120% 100% at 50% 0%, transparent 40%, rgba(4,8,16,.45) 100%);
}
.orb { position: fixed; border-radius: 50%; z-index: -2; pointer-events: none; filter: blur(2px); transition: opacity 0.3s; }
.orb-a {
  width: 72vmax; height: 72vmax; right: -24vmax; top: -26vmax;
  background: radial-gradient(circle, rgba(255,93,93,.09) 0%, transparent 62%);
}
.orb-b {
  width: 70vmax; height: 70vmax; left: -26vmax; bottom: -28vmax;
  background: radial-gradient(circle, rgba(87,168,255,.10) 0%, transparent 62%);
}
.noise {
  position: fixed; inset: 0; z-index: 60; pointer-events: none; opacity: .04; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='0.6'/%3E%3C/svg%3E");
}
.ruler {
  position: fixed; left: 0; top: 0; bottom: 0; width: 16px; z-index: 40; pointer-events: none;
  background: repeating-linear-gradient(to bottom, var(--line) 0 1px, transparent 1px 12px);
  mask-image: linear-gradient(to right, #000 0 6px, transparent 6px);
  -webkit-mask-image: linear-gradient(to right, #000 0 6px, transparent 6px); opacity: .55;
}
@media (max-width:900px){ .ruler { display: none; } }

.progress {
  position: fixed; top: 0; left: 0; height: 3px; width: 0; background: var(--amber); z-index: 110;
  box-shadow: 0 0 12px rgba(255,176,32,.7);
}

/* ---------- 5. Header & Accessibility Bar ---------- */
header.site {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between; gap: 14px;
  padding: 12px 22px; padding-top: calc(12px + env(safe-area-inset-top));
  background: linear-gradient(to bottom, rgba(8,17,32,.92) 55%, rgba(8,17,32,0));
  transition: background 0.3s;
}
.brand { display: flex; align-items: center; gap: 11px; text-decoration: none; flex: none; }
.brand svg { width: 32px; height: 32px; flex: none; }
.brand b { font-family: var(--display); font-weight: 800; font-size: 1.55rem; letter-spacing: .05em; line-height: 1; }
.brand small { display: block; font-family: var(--mono); font-size: .58rem; letter-spacing: .3em; text-transform: uppercase; color: var(--dim); margin-top: 2px; }

.head-right { display: flex; align-items: center; gap: 10px; }

/* Accessibility Controls */
.a11y-toolbar {
  display: flex; align-items: center; gap: 8px;
  background: var(--panel); border: 1px solid var(--line);
  padding: 4px 8px;
}

/* Theme Toggle Button */
.theme-toggle-btn {
  background: none; border: 0; color: var(--dim); cursor: pointer;
  display: grid; place-items: center; padding: 4px; border-radius: 2px;
  transition: color .2s, transform .2s;
}
.theme-toggle-btn:hover { color: var(--amber); transform: scale(1.1); }
.theme-toggle-btn svg { width: 17px; height: 17px; }
.theme-toggle-btn .sun-icon { display: none; }
.theme-toggle-btn .moon-icon { display: block; }
[data-theme="light"] .theme-toggle-btn .sun-icon { display: block; }
[data-theme="light"] .theme-toggle-btn .moon-icon { display: none; }

/* Font Size Dropdown */
.font-select-wrap {
  display: flex; align-items: center; gap: 5px;
  border-left: 1px solid var(--line); padding-left: 8px;
}
.font-select-wrap .label-icon {
  font-family: var(--mono); font-weight: 700; font-size: .72rem; color: var(--dim);
}
.font-select {
  background: var(--bg2); border: 1px solid var(--line); color: var(--paper);
  font-family: var(--mono); font-size: .68rem; font-weight: 700;
  padding: 4px 6px; border-radius: 2px; cursor: pointer; outline: none;
  transition: border-color .2s;
}
.font-select:hover, .font-select:focus {
  border-color: var(--amber);
}

.status-chip {
  display: flex; align-items: center; gap: 8px; border: 1px solid var(--line); background: var(--panel);
  padding: 7px 12px; font-family: var(--mono); font-size: .68rem; letter-spacing: .2em; text-transform: uppercase; color: var(--fog);
}
.pulse { width: 8px; height: 8px; border-radius: 50%; background: var(--mint); position: relative; }
.pulse::after {
  content: ''; position: absolute; inset: -3px; border-radius: 50%; border: 2px solid var(--mint);
  animation: pulse 2s ease-out infinite;
}
@keyframes pulse { 0% { transform: scale(.5); opacity: .9; } 80% { transform: scale(1.5); opacity: 0; } 100% { opacity: 0; } }

.chat-btn {
  display: flex; align-items: center; gap: 8px; background: var(--amber); color: #241a02; text-decoration: none;
  font-weight: 700; font-size: .92rem; padding: 8px 15px; border: 0;
  box-shadow: 0 6px 20px -8px rgba(255,176,32,.65); transition: transform .25s, box-shadow .25s;
}
.chat-btn:hover { transform: translateY(-2px); box-shadow: 0 10px 24px -8px rgba(255,176,32,.8); }
.chat-btn svg { width: 16px; height: 16px; }

@media (max-width: 820px) {
  .status-chip { display: none; }
  .chat-btn span { display: none; }
  .chat-btn { padding: 8px 11px; }
}
@media (max-width: 540px) {
  .brand small { display: none; }
  .font-select-wrap .label-icon { display: none; }
}

/* Rail: Minimalist diamonds without flyout text */
.rail { position: fixed; right: 24px; top: 50%; transform: translateY(-50%); z-index: 100; list-style: none; }
.rail li { position: relative; margin: 18px 0; display: flex; justify-content: flex-end; }
.rail a {
  display: block; width: 10px; height: 10px; border: 2px solid rgba(143,163,201,.7); transform: rotate(45deg);
  transition: all .3s; text-decoration: none;
}
.rail a:hover { border-color: var(--amber); transform: rotate(45deg) scale(1.2); }
.rail a.active {
  background: var(--amber); border-color: var(--amber); transform: rotate(45deg) scale(1.3);
  box-shadow: 0 0 12px rgba(255,176,32,.6);
}
@media (max-width:760px) { .rail { display: none; } }

/* Scene Shells */
.scene { position: relative; padding: 60px 24px 54px; scroll-margin-top: 76px; }
#mess { padding-top: 104px; }
@media (max-width:760px) {
  .scene { padding: 38px 18px 34px; scroll-margin-top: 60px; }
  #mess { padding-top: 82px; }
}
.wrap { width: 100%; max-width: 1080px; margin: 0 auto; position: relative; }
.actbreak { display: flex; align-items: center; justify-content: center; gap: 16px; max-width: 580px; margin: 0 auto; padding: 0 32px; }
.actbreak::before, .actbreak::after {
  content: ''; height: 1px; flex: 1;
  background: linear-gradient(90deg, transparent, var(--line) 35%, var(--line) 65%, transparent);
}
.actbreak i { width: 8px; height: 8px; border: 2px solid var(--amber); transform: rotate(45deg); flex: none; }

.kicker {
  display: flex; align-items: center; gap: 14px; font-family: var(--mono); font-size: .68rem; font-weight: 700;
  letter-spacing: .32em; text-transform: uppercase; color: var(--amber);
}
.kicker::before { content: ''; width: 34px; height: 3px; background: var(--amber); flex: none; }

h1.display {
  font-family: var(--display); font-weight: 800; text-transform: uppercase;
  font-size: clamp(2.3rem,5.6vw,4.6rem); line-height: .96; margin-top: 14px;
}
h2.display {
  font-family: var(--display); font-weight: 800; text-transform: uppercase;
  font-size: clamp(2rem,4.4vw,3.4rem); line-height: .97; margin-top: 12px;
}
.lede { font-size: clamp(1rem,1.45vw,1.18rem); color: var(--fog); max-width: 600px; margin-top: 14px; }
.mono { font-family: var(--mono); }
.t-amber { color: var(--amber); }

/* Reveals */
[data-rev] {
  opacity: 0;
  transition: opacity .8s ease var(--d,0ms), transform .8s cubic-bezier(.22,.9,.28,1) var(--d,0ms);
  transform: var(--from, translateY(32px));
  will-change: opacity, transform;
}
[data-rev="left"] { --from: translateX(-48px); }
[data-rev="right"] { --from: translateX(48px); }
[data-rev="up"] { --from: translateY(32px); }
[data-rev].is-in { opacity: 1; transform: none; }

/* Footer */
footer { border-top: 1px solid var(--line); padding: 24px 20px 70px; text-align: center; position: relative; z-index: 5; }
footer p { font-family: var(--mono); font-size: .66rem; letter-spacing: .2em; text-transform: uppercase; color: var(--dim); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  [data-rev] { opacity: 1 !important; transform: none !important; }
}