/* ══════════════════════════════════════════════════════════════════════
   base.css ─ Resets, design tokens, layout grid, header, editor, controls.
   Defines all CSS custom properties (--cream, --ink, --accent, etc.) for
   the LIGHT theme. Theme overrides live in themes.css.
   ══════════════════════════════════════════════════════════════════════ */

/* ── Design tokens (light theme defaults) ─────────────────────────── */
:root {
  --cream:  #f3f1ed;
  --white:  #ffffff;
  --black:  #0e0e0e;
  --ink:    #1c1c1c;       /* borders / shadows */
  --accent: #00c9a7;       /* teal — primary accent */
  --yellow: #f59e0b;       /* amber — warnings only */
  --pink:   #f0166e;       /* pointers / changed-state */
  --blue:   #3b82f6;
  --green:  #10b981;
  --red:    #ef4444;
  --purple: #8b5cf6;
  --gray:   #9ca3af;
  --text:   #111111;
  --muted:  #6b7280;
  --sh:  2px 2px 0 var(--ink);
  --shL: 3px 3px 0 var(--ink);
  --mono: "JetBrains Mono", ui-monospace, "Cascadia Code", Menlo, monospace;
  --ui:   "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; overflow: hidden; }
body {
  font-family: var(--ui);
  font-size: 14px;
  color: var(--text);
  background: var(--cream);
  display: flex;
  flex-direction: column;
}

/* ── Header (always dark for brand consistency) ───────────────────── */
header {
  height: 48px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 18px;
  gap: 16px;
  background: #080808;
  border-bottom: 1px solid #1f1f1f;
  position: relative;
  z-index: 20;
  overflow-x: auto;
  overflow-y: hidden;
  min-width: 0;
}
.logo { display: flex; align-items: center; gap: 9px; flex-shrink: 0; }
.logo-mark {
  width: 28px; height: 28px;
  background: var(--accent);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--mono);
  font-size: 11px; font-weight: 900;
  color: #000;
  letter-spacing: -1px;
  flex-shrink: 0;
}
.logo-name {
  font-family: var(--mono);
  font-size: 13px; font-weight: 900;
  letter-spacing: 5px;
  color: rgba(255,255,255,.85);
  text-transform: uppercase;
}
.logo-name span { color: var(--accent); }

.hm { display: flex; align-items: center; gap: 10px; flex: 0 1 auto; justify-content: center; min-width: 0; }
.hm label {
  font-family: var(--mono); font-size: 9px; letter-spacing: 2px;
  text-transform: uppercase; color: rgba(255,255,255,.4); font-weight: 700;
  white-space: nowrap;
}
#tmpl {
  background: #161616;
  color: rgba(255,255,255,.7);
  border: 1px solid #2a2a2a;
  padding: 5px 10px;
  font-family: var(--mono); font-size: 11px;
  cursor: pointer; outline: none;
  min-width: 200px;
  flex-shrink: 1;
  -webkit-appearance: none; appearance: none;
  transition: border-color .15s;
  overflow: hidden;
  text-overflow: ellipsis;
}
#tmpl:focus { border-color: var(--accent); outline: none; }
#tmpl:hover { border-color: #444; }

/* ── Status indicator (dot + label) ───────────────────────────────── */
#status {
  display: flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: 10px; letter-spacing: 1px;
  color: rgba(255,255,255,.5); text-transform: uppercase;
  flex-shrink: 0;
}
.sdot {
  width: 10px; height: 10px;
  border: 2px solid rgba(255,255,255,.3);
  background: transparent;
  flex-shrink: 0;
  transition: all .3s;
}
#status.loading .sdot { background: var(--accent); border-color: var(--accent); animation: pulse .8s ease infinite alternate; }
#status.ready   .sdot { background: var(--green);  border-color: var(--green); }
#status.err     .sdot { background: var(--red);    border-color: var(--red); }
@keyframes pulse { from { opacity:.3; } to { opacity:1; } }

/* ── Top progress stripe ──────────────────────────────────────────── */
#topstripe { height: 3px; background: #222; flex-shrink: 0; }
#topstripe-fill { height: 100%; width: 0%; background: var(--accent); transition: width .12s linear; }

/* ── Main split layout ────────────────────────────────────────────── */
#main { flex: 1; display: flex; min-height: 0; overflow: hidden; }
#left {
  display: flex; flex-direction: column;
  width: 46%; min-width: 200px; max-width: 78%;
  border-right: 1.5px solid var(--ink);
  background: var(--cream);
}

/* ── Live mode — animated electricity border on the left panel ───────
   @property lets us animate the conic-gradient angle directly.
   Two bright sparks rotate around all four edges continuously.
   pointer-events:none keeps every click / drag working normally.
   ─────────────────────────────────────────────────────────────────── */
/* ── Live mode — all three section bars breathe with teal energy ─────
   body.live-active targets 01, 02, AND 03 simultaneously.
   The whole bar background pulses + the number label glows.
   ─────────────────────────────────────────────────────────────────── */
@keyframes live-bar-breathe {
  0%, 100% {
    background: #0d0d0d;
    box-shadow: none;
  }
  50% {
    background: oklch(from var(--accent) l c h / .10);
    box-shadow: 0 1px 8px oklch(from var(--accent) l c h / .28),
                inset 0 0 24px oklch(from var(--accent) l c h / .06);
  }
}
@keyframes live-num-glow {
  0%, 100% { opacity: .7;  text-shadow: none; }
  50%       { opacity: 1;   text-shadow: 0 0 10px oklch(from var(--accent) l c h / .9),
                                         0 0 20px oklch(from var(--accent) l c h / .4); }
}
body.live-active .ch-head {
  animation: live-bar-breathe 2.4s ease-in-out infinite;
}
body.live-active .ch-num {
  animation: live-num-glow 2.4s ease-in-out infinite;
}
/* ── Live mode — visualization card titles breathe with accent energy ── */
@keyframes live-vb-header-breathe {
  0%, 100% {
    color: var(--text);
    text-shadow: none;
    opacity: .75;
  }
  50% {
    color: oklch(from var(--accent) l c h);
    text-shadow: 0 0 10px oklch(from var(--accent) l c h / .45),
                 0 0 20px oklch(from var(--accent) l c h / .18);
    opacity: 1;
  }
}
@keyframes live-vb-line-breathe {
  0%, 100% { background: var(--ink); opacity: .35; }
  50%       { background: oklch(from var(--accent) l c h); opacity: .55; }
}
body.live-active .vb h3 {
  animation: live-vb-header-breathe 2.4s ease-in-out infinite;
}
body.live-active .vb h3::after {
  animation: live-vb-line-breathe 2.4s ease-in-out infinite;
}
#right {
  flex: 1; display: flex; flex-direction: column;
  min-width: 0; background: var(--cream);
}

/* ── Resizers (between code/input and code/visualizer) ────────────── */
.hres {
  width: 5px; flex-shrink: 0; cursor: col-resize;
  background: var(--ink);
  transition: background .2s;
  position: relative; z-index: 10;
}
.hres:hover, .hres.act { background: var(--accent); }
.vres {
  height: 3px; flex-shrink: 0; cursor: row-resize;
  background: var(--ink);
  transition: background .2s;
}
.vres:hover, .vres.act { background: var(--accent); }
body.dh { user-select: none; cursor: col-resize; }
body.dv { user-select: none; cursor: row-resize; }

/* ── Panel section headers ("01 SOLUTION CODE", etc.) ─────────────── */
.ch-head {
  display: flex; align-items: center; gap: 10px;
  padding: 0 14px; height: 32px;
  background: #0d0d0d;
  border-bottom: 1px solid #1f1f1f;
  flex-shrink: 0;
}
.ch-num {
  font-family: var(--mono); font-size: 8px; font-weight: 900;
  letter-spacing: 1px; text-transform: uppercase;
  color: var(--accent);
  padding: 0;
  opacity: .7;
}
.ch-label {
  font-family: var(--mono); font-size: 10px; letter-spacing: 2px;
  text-transform: uppercase; color: rgba(255,255,255,.7); font-weight: 700;
}
.ch-sep { flex: 1; }
.ch-info {
  font-family: var(--mono); font-size: 9px; letter-spacing: .5px;
  color: rgba(255,255,255,.28); text-transform: uppercase;
}

/* ── Code editor (CodeMirror) ─────────────────────────────────────── */
#left-top { flex: 1; min-height: 80px; display: flex; flex-direction: column; overflow: hidden; }
.edflex { flex: 1; display: flex; flex-direction: column; min-height: 0; overflow: hidden; }
.CodeMirror {
  font-family: var(--mono) !important;
  font-size: 13px !important;
  height: 100% !important;
  background: #fdfcf8 !important;
  color: #111 !important;
}
.CodeMirror-gutters { background: #ede9e0 !important; border-right: 1.5px solid var(--ink) !important; }
.CodeMirror-linenumber { color: #aaa !important; }
.CodeMirror-cursor { border-left: 2.5px solid var(--pink) !important; }
.CodeMirror-selected { background: rgba(0,201,167,.22) !important; }
.CodeMirror-linebackground.hl { background: rgba(0,201,167,.14) !important; }
/* Indent guide spans — background color set directly by JS overlay */
.cm-indent-guide { display: inline-block; }
.cm-keyword  { color: var(--blue)   !important; font-weight: 700; }
.cm-def      { color: #111          !important; font-weight: 700; }
.cm-string   { color: var(--pink)   !important; }
.cm-number   { color: #0a8a5e       !important; font-weight: 700; }
.cm-comment  { color: #aaa          !important; font-style: italic; }
.cm-operator { color: #444          !important; }
.cm-variable { color: #111          !important; }
.cm-builtin  { color: var(--purple) !important; }
.cm-atom     { color: var(--blue)   !important; }

/* ── Test input panel (lower-left) ────────────────────────────────── */
#left-bot { display: flex; flex-direction: column; height: 185px; min-height: 60px; overflow: hidden; }
#tinput {
  flex: 1; resize: none; border: none; outline: none;
  background: #fdfcf8; color: var(--text);
  font-family: var(--mono); font-size: 12.5px; line-height: 1.65;
  padding: 10px 12px; min-height: 0;
}
#tinput::placeholder { color: #bbb; font-size: 11.5px; line-height: 1.8; }
#badgerow { display: flex; align-items: center; gap: 6px; }
#pbadge {
  font-family: var(--mono); font-size: 9px; letter-spacing: 1px;
  text-transform: uppercase;
  padding: 2px 7px; font-weight: 900;
  border: 1.5px solid var(--ink);
  background: var(--white); color: var(--muted);
}
#pbadge.ok   { background: var(--green); color: var(--black); border-color: var(--ink); }
#pbadge.warn { background: var(--accent); color: var(--black); border-color: var(--ink); }
#tgl {
  font-family: var(--mono); font-size: 9px; letter-spacing: 1px;
  text-transform: uppercase; cursor: pointer; color: var(--muted);
  padding: 2px 6px; border: 2px solid transparent;
  transition: all .12s; user-select: none; font-weight: 700;
  background: transparent;
}
#tgl:hover { border-color: var(--ink); color: var(--text); background: var(--accent); }
#genprev {
  background: var(--cream); border-top: 1px solid var(--ink);
  padding: 5px 12px; font-family: var(--mono); font-size: 10.5px;
  color: var(--muted); line-height: 1.6; white-space: pre; overflow-x: auto;
  max-height: 50px; overflow-y: auto; flex-shrink: 0;
}
#genprev.hidden { display: none; }

/* ── Visualizer container (right pane) ────────────────────────────── */
#viz { flex: 1; overflow: auto; padding: 14px; display: flex; flex-direction: column; gap: 12px; }
#errbanner {
  display: none;
  background: rgba(239,68,68,.06);
  border: 1.5px solid var(--red);
  border-left: 3px solid var(--red);
  color: var(--red); padding: 10px 14px;
  font-family: var(--mono); font-size: 11px; white-space: pre-wrap;
  font-weight: 700;
}
#errbanner.show { display: block; }
#errbanner::before { content: 'ERROR  '; font-weight: 900; font-size: 12px; }
.empty { color: var(--gray); font-family: var(--mono); font-size: 11px; letter-spacing: 1px; text-align: center; padding: 36px 0; line-height: 2; }

/* ── Bottom transport bar (RUN, step, play, speed) ───────────────── */
#bottom {
  height: 54px; flex-shrink: 0;
  background: #080808;
  border-top: 1px solid #1f1f1f;
  display: flex; align-items: center;
  padding: 0 18px; gap: 0;
  position: relative; z-index: 20;
}
.bdiv { width: 1px; height: 22px; background: #242424; margin: 0 14px; flex-shrink: 0; }

#run {
  background: var(--accent);
  color: #000;
  border: none;
  padding: 0 20px;
  height: 34px;
  font-family: var(--mono); font-size: 11px; font-weight: 900;
  letter-spacing: 2.5px; text-transform: uppercase;
  cursor: pointer;
  transition: opacity .12s, transform .08s;
  flex-shrink: 0;
  display: inline-flex; align-items: center; gap: 9px;
}
/* CSS-drawn play triangle (renders identically on every device — no emoji) */
.ico-run {
  width: 0; height: 0;
  border-style: solid;
  border-width: 5px 0 5px 8px;
  border-color: transparent transparent transparent currentColor;
  flex-shrink: 0;
}
/* CSS-drawn lightning bolt for LIVE */
.ico-bolt {
  width: 9px; height: 13px;
  background: currentColor;
  clip-path: polygon(52% 0, 0 60%, 40% 60%, 32% 100%, 100% 38%, 56% 38%);
  flex-shrink: 0;
}
#run:hover:not(:disabled) { opacity: .88; transform: translateY(-1px); }
#run:active:not(:disabled) { opacity: 1; transform: translateY(0); }
#run:disabled { opacity: .25; cursor: not-allowed; }

/* ── Live-mode toggle button ──────────────────────────────────────── */
#live-btn {
  background: transparent;
  color: #555;
  border: 1.5px solid #333;
  padding: 0 14px;
  height: 34px;
  margin-left: 8px;
  font-family: var(--mono); font-size: 11px; font-weight: 900;
  letter-spacing: 2px; text-transform: uppercase;
  cursor: pointer; flex-shrink: 0;
  transition: all .15s;
  position: relative;
  display: inline-flex; align-items: center; gap: 7px;
}
#live-btn:hover { border-color: var(--accent); color: var(--accent); }
#live-btn.on {
  border-color: var(--accent);
  color: #000;
  background: var(--accent);
}
/* Pulsing dot shown while a live re-run is pending (debounce countdown) */
#live-btn.on.pending::after {
  content: '';
  position: absolute;
  top: 5px; right: 5px;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: #000;
  animation: live-pulse 0.7s ease-in-out infinite alternate;
}
@keyframes live-pulse {
  from { opacity: 0.3; transform: scale(0.8); }
  to   { opacity: 1;   transform: scale(1.2); }
}

.tbtn {
  width: 32px; height: 32px;
  background: transparent;
  border: 1px solid #2a2a2a;
  color: #666; font-size: 12px;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: all .1s; flex-shrink: 0;
  font-weight: 700;
}
.tbtn:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); background: rgba(0,201,167,.07); }
.tbtn:active:not(:disabled) { opacity: .7; }
.tbtn:disabled { opacity: .2; cursor: not-allowed; }
.tbtn.play {
  background: var(--accent); color: #000;
  border-color: var(--accent); font-size: 12px;
  width: 34px; height: 34px;
}
.tbtn.play:hover:not(:disabled) { opacity: .88; background: var(--accent); }
.tbtn.play.on { background: var(--pink); color: #fff; border-color: var(--pink); }
.tbtn.play.on:hover:not(:disabled) { background: var(--pink); border-color: var(--pink); }
#tgrp { display: flex; gap: 3px; }

/* ── CSS-drawn transport icons (no Unicode glyphs / emoji) ──────────── */
.tbtn.icon-prev::before {
  content: ''; width: 0; height: 0; border-style: solid;
  border-width: 6px 9px 6px 0;
  border-color: transparent currentColor transparent transparent;
}
.tbtn.icon-next::before {
  content: ''; width: 0; height: 0; border-style: solid;
  border-width: 6px 0 6px 9px;
  border-color: transparent transparent transparent currentColor;
}
/* Play state: right-pointing triangle */
.tbtn.play::before {
  content: ''; width: 0; height: 0; border-style: solid;
  border-width: 6px 0 6px 10px;
  border-color: transparent transparent transparent currentColor;
  margin-left: 2px;
}
/* Playing state: two pause bars (overrides the triangle) */
.tbtn.play.on::before {
  content: ''; width: 9px; height: 12px;
  border: none; margin-left: 0;
  border-left: 3px solid currentColor;
  border-right: 3px solid currentColor;
  background: transparent;
}

/* Progress block */
#pblock { display: flex; flex-direction: column; align-items: flex-start; gap: 4px; min-width: 90px; }
#pnum { font-family: var(--mono); font-size: 11px; color: var(--accent); letter-spacing: 1px; font-weight: 900; }
#ptrack { width: 80px; height: 4px; background: #333; position: relative; }
#pfill { height: 100%; width: 0%; background: var(--accent); transition: width .12s linear; }

/* Speed slider */
#sblock { display: flex; align-items: center; gap: 8px; margin-left: auto; }
#slabel { font-family: var(--mono); font-size: 9px; letter-spacing: 2px; text-transform: uppercase; color: #555; font-weight: 900; }
input[type=range] {
  -webkit-appearance: none; width: 80px; height: 3px;
  background: #333; cursor: pointer; outline: none;
}
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none; width: 14px; height: 14px;
  background: var(--accent); cursor: pointer;
  border: 2px solid var(--ink);
}
#sval { font-family: var(--mono); font-size: 10px; color: var(--accent); min-width: 28px; font-weight: 900; }

/* ── Initial loading screen (covers everything until Pyodide ready) ─ */
#loading {
  position: fixed; inset: 0;
  background: #080808;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  z-index: 9999; gap: 32px;
}
#loading.hidden { display: none; }
.spin-ring {
  width: 40px; height: 40px;
  border: 2px solid #1f1f1f;
  border-top-color: var(--accent);
  animation: spin .65s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.load-label {
  font-family: var(--mono); font-size: 10px; letter-spacing: 3px;
  text-transform: uppercase; color: #444;
  text-align: center; line-height: 2.4;
}
.load-label strong { display: block; color: var(--accent); font-size: 20px; letter-spacing: 8px; margin-bottom: 12px; font-weight: 900; }