/* ==========================================================================
   THEME PALETTE: Cream White & Go Teal/Green (Warm Neutrals + True Black Dark Mode)
   No blue tints: replaced with Go Teal / Jade Green / Warm Carbon & Pitch Black
   ========================================================================== */
:root {
  /* Go Teal / Blue-Green Accent (Teal / Sage / Jade focused) */
  --go-cyan: #00a299;
  --go-teal: #00877f;
  --go-dark-teal: #005f59;
  --go-accent-soft: rgba(0, 162, 153, 0.12);

  /* Light Mode (Warm Cream White / Editorial) */
  --bg-primary: #fcfbf7;
  --bg-surface: #f4f0e6;
  --bg-card: #ffffff;
  --bg-input: #fdfdfb;
  --bg-gutter: #f0ebe0;
  --border-subtle: #e5ded0;
  --border-strong: #d3c9b6;
  
  --text-main: #212529;
  --text-muted: #6c757d;
  --text-dim: #9aa0a6;
  --placeholder: #b2aba0;
  --line-numbers: #a8a094;

  --accent: #00877f;
  --accent-hover: #006f68;
  --accent-light: #e6f6f5;
  --focus-ring: rgba(0, 135, 127, 0.28);

  --status-ready: #16a34a;
  --status-error: #dc2626;

  --shadow-sm: 0 1px 2px 0 rgba(40, 35, 28, 0.04);
  --shadow-md: 0 4px 12px -1px rgba(40, 35, 28, 0.06), 0 2px 4px -2px rgba(40, 35, 28, 0.04);
  --shadow-lg: 0 10px 25px -3px rgba(40, 35, 28, 0.08);

  --font-sans: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;

  /* IDE Syntax Colors - Light Mode (Warm, zero blue tint) */
  --syn-keyword: #86198f;     /* deep violet for keywords */
  --syn-type: #00877f;        /* go teal/jade for types */
  --syn-property: #1e293b;    /* neutral charcoal for identifiers/keys */
  --syn-string: #15803d;      /* forest green */
  --syn-tag: #b45309;         /* warm amber/brown */
  --syn-number: #c2410c;      /* warm orange */
  --syn-boolean: #d97706;     /* amber */
  --syn-null: #dc2626;        /* red */
  --syn-comment: #8c857b;     /* warm gray */
  --syn-punctuation: #6b7280; /* neutral slate */
  --syn-operator: #be123c;    /* crimson */
}

[data-theme="dark"] {
  /* True Deep Black / OLED Dark Mode (Neutral charcoal & pitch black, no blue) */
  --bg-primary: #0a0a0a;
  --bg-surface: #141414;
  --bg-card: #171717;
  --bg-input: #0f0f0f;
  --bg-gutter: #121212;
  --border-subtle: #262626;
  --border-strong: #383838;

  --text-main: #f5f5f5;
  --text-muted: #a3a3a3;
  --text-dim: #737373;
  --placeholder: #525252;
  --line-numbers: #525252;

  --accent: #2dd4bf;         /* vibrant teal green */
  --accent-hover: #5eead4;
  --accent-light: rgba(45, 212, 191, 0.12);
  --focus-ring: rgba(45, 212, 191, 0.3);

  --status-ready: #4ade80;
  --status-error: #f87171;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.8);
  --shadow-md: 0 4px 12px -1px rgba(0, 0, 0, 0.9);
  --shadow-lg: 0 10px 25px -3px rgba(0, 0, 0, 0.95);

  /* IDE Syntax Colors - Dark Mode (Warm, neon mint, jade, amber, no dark blues) */
  --syn-keyword: #e879f9;     /* bright magenta / violet */
  --syn-type: #2dd4bf;        /* neon teal / jade */
  --syn-property: #e5e5e5;    /* clean light gray for property names */
  --syn-string: #86efac;      /* spring mint green */
  --syn-tag: #fbbf24;         /* bright gold/amber */
  --syn-number: #fb923c;      /* warm orange */
  --syn-boolean: #f59e0b;     /* amber */
  --syn-null: #f87171;        /* coral red */
  --syn-comment: #737373;     /* neutral charcoal gray */
  --syn-punctuation: #a3a3a3; /* neutral light gray */
  --syn-operator: #fb7185;    /* coral rose */
}

/* ==========================================================================
   GLOBAL RESET & BASE STYLES
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.5;
  min-height: 100vh;
  transition: background-color 0.2s ease, color 0.2s ease;
  overflow-x: hidden;
}

.app-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
  width: 100%;
  max-width: 100%;
  margin: 0;
  padding: 10px 12px 12px;
  gap: 10px;
}

/* ==========================================================================
   HEADER
   ========================================================================== */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 14px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  box-shadow: var(--shadow-sm);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.brand-img {
  width: 26px;
  height: 26px;
  object-fit: contain;
  display: block;
}

.brand-text {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.brand-text h1 {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-main);
}

.badge {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 2px 8px;
  border-radius: 6px;
  background-color: var(--accent-light);
  color: var(--accent);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ==========================================================================
   BUTTONS
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 7px 14px;
  border-radius: 8px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.18s ease-in-out;
}

.btn-secondary {
  background-color: var(--bg-surface);
  border-color: var(--border-subtle);
  color: var(--text-main);
}

.btn-secondary:hover {
  background-color: var(--border-subtle);
  border-color: var(--border-strong);
  color: var(--text-main);
}

.btn-icon {
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: 8px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
}

.btn-icon:hover {
  background-color: var(--border-subtle);
  border-color: var(--border-strong);
}

.btn-icon-small {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  font-size: 0.72rem;
  border-radius: 6px;
  background-color: transparent;
  border: 1px solid transparent;
  color: var(--text-dim);
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-icon-small:hover {
  background-color: var(--border-subtle);
  color: var(--text-main);
  border-color: var(--border-strong);
}

/* Zoom Controls */
.zoom-controls {
  display: flex;
  align-items: center;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 2px;
}

.btn-zoom {
  width: 28px;
  height: 28px;
  border: none;
  background: transparent;
}

.btn-zoom:hover {
  background-color: var(--border-subtle);
}

.zoom-input-wrapper {
  display: flex;
  align-items: center;
}

.zoom-input {
  width: 50px;
  height: 26px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 4px;
  color: var(--text-main);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  text-align: center;
  padding: 0 2px;
  outline: none;
  transition: all 0.15s ease;
}

.zoom-input:hover {
  background-color: var(--border-subtle);
}

.zoom-input:focus {
  background-color: var(--bg-card);
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--focus-ring);
}

/* Panel Toggle Pills */
.panel-toggles {
  display: flex;
  align-items: center;
  gap: 4px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 2px 6px;
}

.toggles-label {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-right: 2px;
}

.toggle-pill {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 6px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-dim);
  cursor: pointer;
  transition: all 0.15s ease;
}

.toggle-pill:hover {
  color: var(--text-main);
  background-color: var(--border-subtle);
}

.toggle-pill.active {
  background-color: var(--bg-card);
  color: var(--accent);
  border-color: var(--border-subtle);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.toggle-pill.disabled-btn {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Top Bar Restore Pills for Hidden Panels */
.hidden-panels-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 2px 6px;
  background-color: var(--accent-light);
  border: 1px solid var(--accent);
  border-radius: 8px;
  transition: opacity 0.2s ease;
}

.dock-label {
  font-size: 0.70rem;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-left: 2px;
}

.dock-buttons {
  display: flex;
  align-items: center;
  gap: 4px;
}

.dock-restore-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-sans);
  font-size: 0.74rem;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 6px;
  border: 1px solid var(--border-subtle);
  background-color: var(--bg-card);
  color: var(--text-main);
  cursor: pointer;
  transition: all 0.15s ease;
}

.dock-restore-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background-color: var(--bg-surface);
}

.btn-small {
  font-size: 0.75rem;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: 6px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
}

.btn-small:hover {
  color: var(--text-main);
  border-color: var(--border-strong);
  background-color: var(--border-subtle);
}

.btn-small.copied {
  background-color: var(--status-ready);
  color: #ffffff;
  border-color: var(--status-ready);
}

/* ==========================================================================
   EDITORS FLEX CONTAINER & RESIZABLE PANELS
   ========================================================================== */
:root {
  --editor-font-size: 0.85rem;
}

.editors-container {
  display: flex;
  flex-direction: row;
  align-items: stretch;
  flex: 1;
  min-height: 0;
  width: 100%;
  overflow: hidden;
  gap: 0;
}

.editor-card {
  display: flex;
  flex-direction: column;
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease;
  flex: 1 1 0px;
  min-width: 220px;
  max-width: 100%;
}

.editor-card.panel-hidden {
  display: none !important;
}

/* Splitter Bar between expandable panels */
.gutter-splitter {
  width: 10px;
  margin: 0 -2px;
  cursor: col-resize;
  position: relative;
  z-index: 10;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.15s ease;
}

.gutter-splitter::after {
  content: "";
  width: 3px;
  height: 36px;
  border-radius: 3px;
  background-color: var(--border-strong);
  transition: height 0.15s ease, background-color 0.15s ease;
}

.gutter-splitter:hover::after,
.gutter-splitter.is-dragging::after {
  background-color: var(--accent);
  height: 52px;
}

body.resizing-panels {
  cursor: col-resize !important;
  user-select: none !important;
}

body.resizing-panels textarea,
body.resizing-panels .highlight-layer {
  pointer-events: none !important;
}

@media (max-width: 1024px) {
  .editors-container {
    flex-direction: column;
    height: auto;
    overflow-y: auto;
    gap: 16px;
  }
  .app-container {
    height: auto;
  }
  .editor-card {
    min-height: 320px;
  }
  .gutter-splitter {
    display: none !important;
  }
}

.editor-card:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--focus-ring);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
}

.card-title {
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-title h2 {
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.tag-support {
  font-size: 0.7rem;
  font-family: var(--font-mono);
  color: var(--text-dim);
  background: var(--bg-card);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--border-subtle);
}

/* TypeScript Interface vs Type Toggle */
.ts-mode-toggle {
  display: inline-flex;
  align-items: center;
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  padding: 1px;
}

.ts-mode-btn {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 4px;
  border: none;
  background: transparent;
  color: var(--text-dim);
  cursor: pointer;
  transition: all 0.15s ease;
}

.ts-mode-btn:hover {
  color: var(--text-main);
}

.ts-mode-btn.active {
  background-color: var(--accent-light);
  color: var(--accent);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.lang-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.go-dot { background-color: var(--accent); }
.json-dot { background-color: #f59e0b; }
.ts-dot { background-color: #10b981; }

.card-actions {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ==========================================================================
   IDE EDITOR AREA WITH LINE NUMBERS & SYNTAX HIGHLIGHT LAYER
   ========================================================================== */
.editor-wrapper {
  position: relative;
  flex: 1;
  display: flex;
  min-height: 250px;
  background-color: var(--bg-input);
  overflow: hidden;
}

/* Line Numbers Gutter */
.line-numbers {
  width: 44px;
  padding: 14px 8px 14px 4px;
  background-color: var(--bg-gutter);
  border-right: 1px solid var(--border-subtle);
  color: var(--line-numbers);
  font-family: var(--font-mono);
  font-size: var(--editor-font-size);
  line-height: 1.6;
  text-align: right;
  user-select: none;
  overflow: hidden;
  white-space: pre;
  flex-shrink: 0;
}

.code-area {
  position: relative;
  flex: 1;
  height: 100%;
  overflow: hidden;
}

/* Highlight pre and textarea are identical in size and typography */
.highlight-layer,
textarea {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 14px 16px;
  font-family: var(--font-mono);
  font-size: var(--editor-font-size);
  line-height: 1.6;
  tab-size: 4;
  white-space: pre;
  word-wrap: normal;
  overflow: auto;
  box-sizing: border-box;
}

/* Textarea is transparent in front for typing & selection cursor */
textarea {
  background: transparent;
  color: transparent;
  caret-color: var(--text-main);
  border: none;
  resize: none;
  outline: none;
  z-index: 2;
}

textarea::selection {
  background: rgba(45, 212, 191, 0.28);
  color: transparent;
}

textarea::placeholder {
  color: var(--placeholder);
  font-style: italic;
  opacity: 0.85;
}

/* Highlight layer behind textarea with colored tokens */
.highlight-layer {
  z-index: 1;
  pointer-events: none;
  background-color: var(--bg-input);
  color: var(--text-main);
}

.highlight-layer code {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
  white-space: inherit;
}

/* ==========================================================================
   SYNTAX HIGHLIGHT TOKENS
   ========================================================================== */
.hl-keyword {
  color: var(--syn-keyword);
  font-weight: 600;
}

.hl-type {
  color: var(--syn-type);
  font-weight: 600;
}

.hl-property {
  color: var(--syn-property);
  font-weight: 500;
}

.hl-string {
  color: var(--syn-string);
}

.hl-tag {
  color: var(--syn-tag);
}

.hl-number {
  color: var(--syn-number);
}

.hl-boolean {
  color: var(--syn-boolean);
  font-weight: 600;
}

.hl-null {
  color: var(--syn-null);
  font-weight: 600;
}

.hl-comment {
  color: var(--syn-comment);
  font-style: italic;
}

.hl-punct {
  color: var(--syn-punctuation);
}

.hl-operator {
  color: var(--syn-operator);
  font-weight: 600;
}

/* ==========================================================================
   CARD FOOTER & ERROR DISPLAY
   ========================================================================== */
.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 14px;
  font-size: 0.74rem;
  font-family: var(--font-mono);
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  min-height: 32px;
}

.status-indicator {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.status-indicator.ready {
  color: var(--status-ready);
}

.status-indicator.ready::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--status-ready);
}

.status-indicator.error {
  color: var(--status-error);
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}

.status-indicator.error::before {
  content: "⚠";
  margin-right: 4px;
}

.editor-card.has-error {
  border-color: var(--status-error);
}

/* ==========================================================================
   TOAST NOTIFICATION
   ========================================================================== */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background-color: var(--text-main);
  color: var(--bg-primary);
  padding: 9px 18px;
  border-radius: 8px;
  font-size: 0.82rem;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
  z-index: 100;
}

.toast.hidden {
  opacity: 0;
  transform: translateY(12px);
}

.hidden {
  display: none !important;
}