/* =========================
   Theme Variables
   ========================= */
:root {
    --bg: #000000;
    --term: #02180a;
    --term-border: #0e2b18;
    --text: #d7ffe7;
    --muted: #7bb08f;
    --accent: #26ff8b;
    --emphasis: hsl(227, 95%, 64%);
    --path: #9affc9;
    --link: #63ffb1;
    --success: #79ffa6;
    --glow: 0 0 3px rgba(21, 255, 132, 0.35);
    --shadow: rgba(0, 0, 0, 0.55);
    --radius: 16px;
    --maxw: 880px;
}

body.nightlight {
    --bg: #f6fff9;
    --term: #ffffff;
    --term-border: #e0f4ea;
    --text: #062113;
    --muted: #3c7056;
    --shadow: rgba(6, 33, 19, 0.08);
    --accent: #008e4d;
    --path: #1da86d;
    --link: #0d8b5d;
    --success: #0ea96a;
    --glow: none;
    --shadow: rgba(0, 0, 0, 0.55);
    --radius: 16px;
    --maxw: 880px;
}

/* =========================
   Global Styles
   ========================= */
*{box-sizing: border-box}
body {
    margin: 0;
    font-family: 'Ubuntu Mono', monospace;
    background-color: var(--bg);
    color: var(--text);
    display: flex;
    justify-content: center;
    background-image:
    radial-gradient(1000px 700px at 15% -10%, rgba(21,255,132,.10), transparent 60%),
    radial-gradient(900px 600px at 110% 120%, rgba(21,255,132,.08), transparent 55%),
    repeating-linear-gradient(0deg, rgba(21,255,132,.05) 0 1px, transparent 1px 24px),
    repeating-linear-gradient(90deg, rgba(21,255,132,.035) 0 1px, transparent 1px 24px);
    background-attachment: fixed, fixed, fixed, fixed;
}

/* =========================
   Headings & Quotes
   ========================= */
h1 {
    font-size: 2.4em;
    font-weight: 700;
    color: var(--emphasis);
    text-shadow: 0 0px 2px var(--accent), var(--glow);
    margin: 36px 0 20px 0;
    letter-spacing: 0.03em;
    text-align: center;
    background: linear-gradient(90deg, var(--accent) 0%, var(--emphasis) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

h2 {
    font-size: 1.6em;
    font-weight: 700;
    color: var(--accent);
    text-shadow: 0 0px 0px var(--accent), var(--glow);
    margin: 30px 0 16px 0;
    letter-spacing: 0.02em;
    border-left: 4px solid var(--accent);
    padding-left: 12px;
    background: linear-gradient(90deg, var(--accent) 60%, var(--emphasis) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

h3 {
    font-size: 1.2em;
    font-weight: 700;
    color: var(--muted);
    text-shadow: 0 0px 0px var(--accent), var(--glow);
    margin: 24px 0 10px 0;
    letter-spacing: 0.01em;
    border-left: 3px solid var(--muted);
    padding-left: 10px;
}

.quote {
    display: block;
    font-size: 1.08em;
    color: var(--emphasis);
    background: rgba(21,255,132,0.13);
    border-left: 4px solid var(--accent);
    padding: 14px 22px;
    margin: 22px 0;
    border-radius: 10px;
    font-style: italic;
    box-shadow: 0 4px 16px rgba(21,255,132,0.10);
}

/* =========================
   Layout Containers
   ========================= */
.wrap {
    width: 100%;
    max-width: var(--maxw);
    padding: 28px 0px 80px;
    position: relative;
}

/* =========================
   Terminal Window
   ========================= */
.terminal {
    background: var(--term);
    border: 1px solid var(--term-border);
    border-radius: var(--radius);
    box-shadow: 0 14px 34px var(--shadow);
    position: fixed;
    width: min(100vw, var(--maxw));
    height: min(1000px, calc(100dvh - 24px));
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.terminal.closed {
    opacity: 0;
    transform: scale(0.8);
    pointer-events: none;
    transition: all 0.3s ease;
}
.terminal.minimized {
    height: 37px; /* only bar visible */
}
.terminal.maximized {
    width: 100% !important;
    height: 100% !important;
    top: 0 !important;
    left: 0 !important;
    border-radius: 0;
}

/* =========================
   Window Bar & Dots
   ========================= */
.window-bar {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px; 
    border-bottom: 1px solid var(--term-border);
    background: linear-gradient(0deg, rgba(21, 255, 132, .06), rgba(21,255,132,.12));
    cursor: grab;
    user-select: none;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius:50%;
    box-shadow:var(--glow);
    cursor: pointer;
    aspect-ratio: 1 / 1;
}

.red{background:#1aff7a}
.yellow{background:#0bd46a}
.green{background:#06a856}

.window-title {
    margin-left:4px;
    font-weight:700;
    letter-spacing: .03em;
    color:var(--muted)
}

/* =========================
   Window Screen
   ========================= */
.window-screen {
    flex: 1;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding: 0px 18px;
    line-height: 1.6;
    font-size: 18px;
    text-shadow: var(--glow);
}

.spawned .window-screen {
    max-width: 700px;
    margin: 0 auto;
    padding-left: 32px;
    padding-right: 32px;
}

/* =========================
   Responsive: Window Bar & Dots
   ========================= */
@media (max-width: 935px) {
  .window-bar {
    padding: 10px 10px;
    gap: 10px;
    min-height: 36px;
    border-radius: 0;
  }
  .dot {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    box-shadow: var(--glow);
    margin: 0;
    display: inline-block;
    vertical-align: middle;
  }
  .window-title {
    margin-left: 4px;
    font-size: 1em;
    letter-spacing: .03em;
  }
}

/* =========================
   Responsive: Window Screen
   ========================= */
@media (max-width: 935px) {
  .window-screen {
    font-size: 15px;
  }
  .spawned .window-screen {
    max-width: 100%;
    margin: 0;
    font-size: 15px;
  }
  .wrap {
    padding: 0;
  }
  .terminal{
    border-radius: 0;
    height: 100%;
  }
  .mjx-container{
    font-size: 15px;
  }
  .mjx-container[display="true"] {
    font-size: 15px;
  }
  .dot {
    width: 12px;
    height: 12px;
    border-radius:50%;
  }
}

/* =========================
   Scrollbar
   ========================= */
.window-screen::-webkit-scrollbar{
  width:0; height:0;
}

/* =========================
   Content Formatting
   ========================= */
.line{ white-space:pre-wrap; margin:12px 0; }
.prompt{ color:var(--accent); text-shadow:var(--glow); }
.path{ color:var(--path); opacity:.9; }
.name{ color:var(--success); font-weight:700; text-shadow:var(--glow); }
.highlight{ color:var(--emphasis) !important; font-weight:700; text-shadow:var(--glow); }
.em{ color:var(--muted); }
a{ color:var(--link); text-decoration:none; font-weight:700; padding:0 .25em; border-radius:6px; border:1px solid rgba(99,255,177,.28); background:rgba(21,255,132,.10); transition:background .15s ease, box-shadow .15s ease, border-color .15s ease; }
a:hover{ background:rgba(21,255,132,.18); border-color:rgba(99,255,177,.55); box-shadow:0 0 14px rgba(21,255,132,.55); }
.columns a::before{ content:'▸ '; color:var(--accent); margin-right:2px; text-shadow:var(--glow); }
.line a{ margin-right:10px; }

/* =========================
   Images
   ========================= */
.photo{ width:240px; border-radius:10px; border:1px solid var(--term-border); }
.figure{ width:500px; border-radius:10px; border:1px solid var(--term-border);}
.photo-display {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
}
.photo-caption {
    font-size: 1em;
    color: var(--muted);
    text-align: center;
    margin-top: 8px;
    max-width: 620px;
    display: block;
    margin-left: auto;
    margin-right: auto;
    font-weight: 700;
    letter-spacing: 0.02em;
}

/* =========================
   Columns
   ========================= */
.columns{ display:grid; grid-template-columns: 80px 60px 40px 1fr; gap:14px; margin:6px 0 2px;  align-items:center;}
.columns .muted{ color:var(--muted); }

/* =========================
   Footer
   ========================= */
.bg-footer{ position: fixed; bottom: 110px; left: 10px; right: 0; text-align:center; font-size:14px; color:var(--muted); z-index: -1; }

/* =========================
   MathJax
   ========================= */
mjx-container {
    color: var(--text);
    font-size: 1.1em;
    text-shadow: var    .dot {
      aspect-ratio: 1 / 1;
    }(--glow);
}
mjx-container[display="true"] {
    display: block;
    margin: 1em auto;
}

/* =========================
   Nightlight Toggle Button
   ========================= */
#nightlight-toggle {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 9999;
  background: var(--term);
  color: var(--accent);
  border: 2px solid var(--accent);
  border-radius: 50%;
  width: 38px;
  height: 38px;
  font-size: 1.3em;
  box-shadow: 0 2px 8px var(--shadow);
  cursor: pointer;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  touch-action: manipulation;
}

#nightlight-toggle.active {
  background: var(--accent);
  color: var(--term);
  border-color: var(--accent);
}

/* =========================
   Responsive: Nightlight Toggle & Tabs
   ========================= */
@media (max-width: 600px) {
  #nightlight-toggle {
    width: 44px;
    height: 44px;
    font-size: 1.5em;
    right: 12px;
    bottom: 12px;
  }
  .window-bar {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    height: 38px;
    min-height: 38px;
    border-radius: 0;
    box-sizing: border-box;
  }
  .dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    aspect-ratio: 1 / 1;
    box-shadow: var(--glow);
    margin: 0;
    display: inline-block;
    vertical-align: middle;
    background-clip: padding-box;
  }
  .window-title {
    margin-left: 4px;
    font-size: 1em;
    letter-spacing: .03em;
    line-height: 1;
  }
}

/* =========================
   Nightlight Mode Overrides
   ========================= */
body.nightlight {
  background: #fffbe6 !important;
  color: #2d2d2d !important;
}
body.nightlight .terminal,
body.nightlight .window-screen {
  background: #fffbe6 !important;
  color: #2d2d2d !important;
}
body.nightlight .window-bar {
  background: #ffe9b3 !important;
  border-bottom: 1px solid #ffd700 !important;
}
body.nightlight .dot {
  box-shadow: none !important;
}