/* ============================================================
   ALIENIZER — Signal Design
   Brutalist / monospace. White + Black + Electric Blue.
   Mobile-first: 375px → 1440px
   ============================================================ */

:root {
  --bg: #ffffff;
  --fg: #000000;
  --fg-muted: #555555;
  --border: #000000;
  --border-light: #cccccc;
  --accent: #0047ff;
  --accent-bg: #eef2ff;
  --surface: #ffffff;
  --surface-alt: #f4f4f4;
  --font-mono: 'Space Mono', monospace;
  --font-noto: 'Noto Sans', 'Noto Sans Armenian', 'Noto Sans Bengali',
    'Noto Sans Coptic', 'Noto Sans Devanagari', 'Noto Sans Ethiopic',
    'Noto Sans Georgian', 'Noto Sans Glagolitic', 'Noto Sans Gothic',
    'Noto Sans Hebrew', 'Noto Sans Javanese', 'Noto Sans Kannada',
    'Noto Sans Khmer', 'Noto Sans Lao', 'Noto Sans Lisu',
    'Noto Sans Malayalam', 'Noto Sans Math', 'Noto Sans Myanmar',
    'Noto Sans NKo', 'Noto Sans Old Italic', 'Noto Sans Osmanya',
    'Noto Sans Runic', 'Noto Sans Sinhala', 'Noto Sans Syriac',
    'Noto Sans Tamil', 'Noto Sans Telugu', 'Noto Sans Thaana',
    'Noto Sans Thai', 'Noto Sans Tibetan', 'Noto Sans Tifinagh',
    'Noto Sans Vai', sans-serif;
}

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.5;
}

/* ---- Main ---- */

main {
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
}

/* ---- Header ---- */

header {
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--fg);
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

header h1 {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  line-height: 1;
}

.subtitle {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--fg-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* ---- Sections ---- */

.section { margin-bottom: 1.5rem; }

.section-label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-muted);
  padding: 0.4rem 0.65rem;
  border-bottom: 1px solid var(--border-light);
  background: var(--surface-alt);
}

/* ---- I/O columns ---- */

.io-columns {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--fg);
  margin-bottom: 1.5rem;
}

.io-col { flex: 1; min-width: 0; }
.io-col + .io-col { border-top: 1px solid var(--fg); }

.io-col .section-label {
  border-bottom: 1px solid var(--border-light);
}

/* ---- Textarea ---- */

textarea {
  width: 100%;
  height: 160px;
  padding: 0.75rem;
  border: none;
  border-bottom: 1px solid var(--border-light);
  background: var(--surface);
  font-family: var(--font-noto);
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--fg);
  resize: none;
  display: block;
}

textarea:focus { outline: none; background: #fafff4; }
textarea::placeholder { color: var(--fg-muted); font-family: var(--font-mono); font-size: 0.75rem; }

/* ---- Output area ---- */

.output-area {
  height: 160px;
  padding: 0.75rem;
  border-bottom: 1px solid var(--border-light);
  background: var(--surface);
  font-family: var(--font-noto);
  font-size: 0.9rem;
  line-height: 1.65;
  overflow-y: auto;
  color: var(--fg);
  white-space: pre-wrap;
  word-break: break-word;
  user-select: all;
  cursor: text;
  display: block;
}

.output-area:empty::before {
  content: "Alienized text will appear here...";
  color: var(--fg-muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.output-area .char-span {
  cursor: pointer;
  position: relative;
  border-radius: 0;
  transition: background 0.08s;
}

.output-area .char-span.replaced:hover {
  background: var(--accent-bg);
}

/* ---- Action bars ---- */

.input-actions,
.output-actions {
  display: flex;
  gap: 0;
}

/* ---- Buttons ---- */

.btn-primary,
.btn-secondary {
  padding: 0.5rem 0.85rem;
  border: none;
  border-right: 1px solid var(--border-light);
  background: var(--surface-alt);
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--fg-muted);
  cursor: pointer;
  transition: none;
  border-radius: 0;
}

.btn-primary:last-child,
.btn-secondary:last-child { border-right: none; }

.btn-primary:hover,
.btn-secondary:hover { background: var(--fg); color: var(--bg); }

.btn-primary {
  color: var(--accent);
  font-weight: 700;
}

.btn-primary:hover { background: var(--accent); color: var(--bg); }

.btn-primary:disabled {
  opacity: 0.4;
  cursor: default;
  background: var(--surface-alt);
  color: var(--fg-muted);
}

.btn-secondary.active {
  background: var(--fg);
  color: var(--bg);
}

/* ---- Controls section ---- */

.section > .section-label {
  margin-bottom: 0;
}

.controls-section-inner {
  border: 1px solid var(--fg);
  border-top: none;
}

/* ---- Presets ---- */

.preset-row {
  display: flex;
  border-bottom: 1px solid var(--border-light);
}

.preset-btn {
  flex: 1;
  padding: 0.5rem 0.25rem;
  border: none;
  border-right: 1px solid var(--border-light);
  background: var(--surface);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-weight: 400;
  cursor: pointer;
  color: var(--fg-muted);
  text-align: center;
  transition: none;
  border-radius: 0;
}

.preset-btn:last-child { border-right: none; }
.preset-btn:hover { background: var(--surface-alt); color: var(--fg); }
.preset-btn.active { background: var(--accent); color: #fff; font-weight: 700; }

/* ---- Controls inner layout ---- */

.controls-row {
  display: flex;
  flex-direction: column;
  align-items: stretch;
}

.controls-sliders {
  flex: 1;
  padding: 0;
  border-bottom: 1px solid var(--border-light);
  display: flex;
  flex-direction: column;
}

.sliders-inner {
  flex: 1;
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

/* ---- Control groups & sliders ---- */

.control-group {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  margin-bottom: 0;
}

.controls-scripts {
  padding: 0;
}

.scripts-inner {
  padding: 0.75rem;
}

.control-label {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.58rem;
  color: var(--fg-muted);
  margin-bottom: 0.3rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.hint { font-size: 0.55rem; text-transform: none; letter-spacing: 0; }

.slider-row { display: flex; align-items: center; gap: 0.6rem; }

input[type="range"] {
  flex: 1;
  height: 2px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--border-light);
  border-radius: 0;
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 12px;
  height: 12px;
  border-radius: 0;
  background: var(--fg);
  cursor: pointer;
}

input[type="range"]::-moz-range-thumb {
  width: 12px;
  height: 12px;
  border-radius: 0;
  background: var(--fg);
  border: none;
  cursor: pointer;
}

.slider-value {
  min-width: 2.8rem;
  text-align: right;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-variant-numeric: tabular-nums;
  color: var(--fg-muted);
}

/* ---- Script options ---- */

.script-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.58rem;
  color: var(--fg-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}

.script-options {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
}

.script-option {
  background: transparent;
  border: 1px solid var(--border-light);
  padding: 0.25rem 0.5rem;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--fg-muted);
  transition: none;
  border-radius: 0;
  text-align: left;
}

.script-option:hover { color: var(--fg); border-color: var(--fg); }
.script-option.active { color: var(--accent); border-color: var(--accent); background: var(--accent-bg); font-weight: 700; }

.script-custom-wrapper {
  margin-top: 0.4rem;
  border-top: 1px solid var(--border-light);
  padding-top: 0.4rem;
}

.script-custom-wrapper select {
  background: var(--surface);
  border: 1px solid var(--border-light);
  padding: 0.3rem 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  text-transform: uppercase;
  color: var(--fg-muted);
  cursor: pointer;
  border-radius: 0;
  width: 100%;
}

.script-custom-wrapper select.active {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-bg);
}

/* ---- Script checkboxes ---- */

.script-checkboxes {
  display: flex;
  flex-wrap: wrap;
  gap: 0.2rem 0.75rem;
  padding: 0.5rem;
  border: 1px solid var(--border-light);
  border-top: none;
  background: var(--surface);
  max-height: 180px;
  overflow-y: auto;
  margin-top: 0;
}

.script-checkboxes label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  display: flex;
  align-items: center;
  gap: 0.25rem;
  cursor: pointer;
  white-space: nowrap;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--fg-muted);
}

.script-checkboxes .script-group-header {
  width: 100%;
  font-size: 0.55rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--fg-muted);
  margin-top: 0.35rem;
  padding-bottom: 0.15rem;
  border-bottom: 1px solid var(--border-light);
}

.script-checkboxes .script-group-header:first-child { margin-top: 0; }

/* ---- Stats ---- */

#stats-section {
  border: 1px solid var(--fg);
  border-top: none;
}

#stats-content {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  line-height: 1.8;
  color: var(--fg-muted);
  padding: 0.65rem 0.75rem;
}

#stats-content strong { color: var(--fg); }

.stats-scripts { margin-top: 0.25rem; }

.stats-scripts .script-tag {
  display: inline-block;
  padding: 0.05rem 0.4rem;
  background: var(--surface-alt);
  border: 1px solid var(--border-light);
  font-size: 0.58rem;
  margin: 0.1rem 0.15rem 0.1rem 0;
}

/* ---- About ---- */

.about-section {
  border: 1px solid var(--border-light);
  margin-top: 1.5rem;
}

.about-section .section-label {
  border-bottom: 1px solid var(--border-light);
  background: var(--surface-alt);
}

.about-content {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  line-height: 1.8;
  color: var(--fg-muted);
  padding: 0.75rem;
}

.about-content p { margin: 0 0 0.5rem; }
.about-content p:last-child { margin-bottom: 0; }

.about-meta {
  font-size: 0.62rem;
  border-top: 1px solid var(--border-light);
  padding-top: 0.5rem;
  margin-top: 0.5rem;
}

.about-license {
  font-size: 0.6rem;
  margin-top: 0.2rem;
}

.about-content a {
  color: var(--fg);
  text-decoration: underline;
  text-decoration-color: var(--border-light);
  text-underline-offset: 2px;
}

.about-content a:hover { text-decoration-color: var(--accent); color: var(--accent); }

.about-more-link {
  display: inline-block;
  font-size: 0.62rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent) !important;
  text-decoration: none !important;
  border-bottom: 1px solid var(--accent);
  padding-bottom: 1px;
}

.about-more-link:hover { opacity: 0.7; }

/* ---- Inspector tooltip ---- */

.inspector-tooltip {
  position: fixed;
  z-index: 100;
  padding: 0.5rem 0.75rem;
  background: var(--fg);
  color: var(--bg);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  line-height: 1.6;
  border-radius: 0;
  pointer-events: none;
  max-width: 300px;
  box-shadow: 4px 4px 0 rgba(0,0,0,0.15);
}

.inspector-tooltip .tt-char {
  font-size: 1.2rem;
  font-family: var(--font-noto);
  border-bottom: 1px solid #444;
  padding-bottom: 0.25rem;
  margin-bottom: 0.25rem;
}

.inspector-tooltip .tt-row { display: flex; gap: 0.4rem; }
.inspector-tooltip .tt-label { opacity: 0.5; min-width: 50px; }

/* ---- Loading ---- */

.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(255,255,255,0.95);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--fg-muted);
}

.loading-spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-light);
  border-top-color: var(--fg);
  border-radius: 0;
  animation: spin 0.6s linear infinite;
  margin-bottom: 0.75rem;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ---- Utility ---- */

.hidden { display: none !important; }

/* ============================================================
   Desktop: >= 768px
   ============================================================ */

@media (min-width: 768px) {
  main {
    max-width: 1200px;
    padding: 2rem 2.5rem 3rem;
  }

  header {
    flex-direction: row;
    align-items: baseline;
    gap: 1.5rem;
  }

  header h1 { font-size: 1.15rem; }

  .io-columns {
    flex-direction: row;
  }

  .io-col + .io-col {
    border-top: none;
    border-left: 1px solid var(--fg);
  }

  textarea { height: 220px; }
  .output-area { height: 220px; }

  .controls-row { flex-direction: row; align-items: stretch; }

  .controls-sliders {
    flex: 1;
    border-bottom: none;
    border-right: 1px solid var(--border-light);
  }

  .sliders-inner {
    justify-content: space-between;
    gap: 0;
  }

  .controls-scripts { flex: 0 0 180px; }

  .script-options { flex-direction: column; gap: 0.2rem; }
  .script-option { display: block; width: 100%; }

  input[type="range"]::-webkit-slider-thumb { width: 10px; height: 10px; }
  input[type="range"]::-moz-range-thumb { width: 10px; height: 10px; }

  .inspector-tooltip { max-width: 360px; }
}

/* ============================================================
   Large desktop: >= 1200px
   ============================================================ */

@media (min-width: 1200px) {
  main {
    max-width: 1440px;
    padding: 2.5rem 4rem 4rem;
  }

  textarea { height: 260px; }
  .output-area { height: 260px; }

  .controls-scripts { flex: 0 0 200px; }
}