/* Design tokens */
:root {
  color-scheme: light dark;
  --bg: #f8fafc;
  --fg: #0f172a;
  --muted: #64748b;
  --card: #ffffff;
  --border: #e2e8f0;
  --primary: #2563eb;
  --primary-contrast: #ffffff;
  --code-bg: #0d1117;
  --shadow: 0 10px 25px -10px rgba(2, 6, 23, 0.2);

  /* ANSI palette tuned for dark terminal background */
  --ansi-fg: #e5e7eb;
  /* default text inside terminal */
  --ansi-black: #a1a1aa;
  /* warm gray for borders */
  --ansi-red: #b91c1c;
  --ansi-green: #166534;
  --ansi-yellow: #a16207;
  --ansi-blue: #1d4ed8;
  --ansi-magenta: #7e22ce;
  --ansi-cyan: #0e7490;
  --ansi-white: #111827;
  --ansi-bright-black: #cbd5e1;
  --ansi-bright-red: #dc2626;
  --ansi-bright-green: #16a34a;
  --ansi-bright-yellow: #ca8a04;
  --ansi-bright-blue: #2563eb;
  --ansi-bright-magenta: #9333ea;
  --ansi-bright-cyan: #0891b2;
  --ansi-bright-white: #111827;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1020;
    --fg: #e5e7eb;
    --muted: #94a3b8;
    --card: #0f172a;
    --border: #1f2937;
    --primary: #60a5fa;
    --primary-contrast: #0b1020;
    --code-bg: #0b1220;
    --shadow: 0 10px 25px -14px rgba(148, 163, 184, 0.25);

    /* ANSI palette for readability on dark bg */
    --ansi-fg: #e5e7eb;
    --ansi-black: #cbd5e1;
    /* use slate-300 instead of pure black */
    --ansi-red: #f87171;
    /* red-400 */
    --ansi-green: #34d399;
    /* emerald-400 */
    --ansi-yellow: #facc15;
    /* yellow-400 */
    --ansi-blue: #93c5fd;
    /* blue-300 */
    --ansi-magenta: #f0abfc;
    /* fuchsia-300 */
    --ansi-cyan: #67e8f9;
    /* cyan-300 */
    --ansi-white: #ffffff;
    --ansi-bright-black: #94a3b8;
    /* slate-400 */
    --ansi-bright-red: #fb7185;
    /* rose-400 */
    --ansi-bright-green: #4ade80;
    /* green-400 */
    --ansi-bright-yellow: #fde047;
    /* yellow-300 */
    --ansi-bright-blue: #60a5fa;
    /* blue-400 */
    --ansi-bright-magenta: #e879f9;
    /* fuchsia-400 */
    --ansi-bright-cyan: #5eead4;
    /* teal-300 */
    --ansi-bright-white: #ffffff;
  }
}

/* Explicit theme overrides (toggle-able) */
body.theme-light {
  --bg: #f8fafc;
  --fg: #0f172a;
  --muted: #64748b;
  --card: #ffffff;
  --border: #e2e8f0;
  --primary: #2563eb;
  --primary-contrast: #ffffff;
  --code-bg: #0d1117;
  /* keep terminal dark in light theme */
  --shadow: 0 10px 25px -10px rgba(2, 6, 23, 0.2);
  --ansi-fg: #e5e7eb;
  --ansi-black: #a1a1aa;
  --ansi-red: #b91c1c;
  --ansi-green: #166534;
  --ansi-yellow: #a16207;
  --ansi-blue: #1d4ed8;
  --ansi-magenta: #7e22ce;
  --ansi-cyan: #0e7490;
  --ansi-white: #ffffff;
  --ansi-bright-black: #cbd5e1;
  --ansi-bright-red: #dc2626;
  --ansi-bright-green: #16a34a;
  --ansi-bright-yellow: #ca8a04;
  --ansi-bright-blue: #2563eb;
  --ansi-bright-magenta: #9333ea;
  --ansi-bright-cyan: #0891b2;
  --ansi-bright-white: #ffffff;
}

body.theme-dark {
  --bg: #0b1020;
  --fg: #e5e7eb;
  --muted: #94a3b8;
  --card: #0f172a;
  --border: #1f2937;
  --primary: #60a5fa;
  --primary-contrast: #0b1020;
  --code-bg: #0b1220;
  --shadow: 0 10px 25px -14px rgba(148, 163, 184, 0.25);
  --ansi-fg: #e5e7eb;
  --ansi-black: #cbd5e1;
  --ansi-red: #f87171;
  --ansi-green: #34d399;
  --ansi-yellow: #facc15;
  --ansi-blue: #93c5fd;
  --ansi-magenta: #f0abfc;
  --ansi-cyan: #67e8f9;
  --ansi-white: #ffffff;
  --ansi-bright-black: #94a3b8;
  --ansi-bright-red: #fb7185;
  --ansi-bright-green: #4ade80;
  --ansi-bright-yellow: #fde047;
  --ansi-bright-blue: #60a5fa;
  --ansi-bright-magenta: #e879f9;
  --ansi-bright-cyan: #5eead4;
  --ansi-bright-white: #ffffff;
}

/* Base */
* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  background: radial-gradient(1200px 800px at 15% -20%, rgba(37, 99, 235, .12), transparent),
    radial-gradient(1000px 700px at 110% 10%, rgba(99, 102, 241, .10), transparent),
    var(--bg);
  color: var(--fg);
  line-height: 1.5;
}

.container {
  max-width: 80%;
  margin: 0 auto;
  padding: 32px 20px 48px;
}

.page-header h1 {
  margin: 0 0 4px;
  font-size: 28px;
  letter-spacing: -0.01em;
}

.header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.subtitle {
  margin: 0 0 20px;
  color: var(--muted);
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px;
  box-shadow: var(--shadow);
}

/* Controls */
.controls-grid {
  display: grid;
  grid-template-columns: 1.2fr .8fr .8fr .6fr .6fr auto;
  gap: 12px 14px;
  /* Top-align items so fields with helper text don't push others down */
  align-items: start;
}

@media (max-width: 960px) {
  .controls-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 600px) {
  .controls-grid {
    grid-template-columns: 1fr;
  }
}

.field {
  display: grid;
  gap: 6px;
}

.field.compact input {
  padding-right: 8px;
}

label {
  font-size: 12px;
  color: var(--muted);
}

input[type="text"],
input[type="number"],
select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: transparent;
  color: var(--fg);
  outline: none;
  transition: border-color .15s ease, box-shadow .15s ease;
}

input::placeholder {
  color: color-mix(in oklab, var(--muted) 60%, transparent);
}

input:focus,
select:focus {
  border-color: color-mix(in oklab, var(--primary) 60%, var(--border));
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--primary) 20%, transparent);
}

.actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  /* Keep the Run button aligned with the bottom of the tallest field */
  align-self: end;
}

.btn {
  padding: 11px 16px;
  border: 1px solid color-mix(in oklab, var(--primary) 60%, var(--border));
  border-radius: 10px;
  color: var(--primary-contrast);
  background: linear-gradient(180deg, color-mix(in oklab, var(--primary) 92%, white) 0%, var(--primary) 100%);
  cursor: pointer;
  font-weight: 600;
  transition: transform .06s ease, filter .15s ease, box-shadow .15s ease;
  box-shadow: 0 6px 18px -8px color-mix(in oklab, var(--primary) 60%, transparent);
}

.btn:hover {
  filter: brightness(1.05);
}

.btn:active {
  transform: translateY(1px);
}

.theme-toggle {
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--fg);
  padding: 8px 12px;
  border-radius: 10px;
  cursor: pointer;
  transition: background .15s ease, border-color .15s ease;
}

.theme-toggle:hover {
  border-color: color-mix(in oklab, var(--primary) 50%, var(--border));
}

.help {
  margin: 10px 2px 0;
  font-size: 12px;
  color: var(--muted);
}

/* Output */
.output {
  margin-top: 18px;
  padding: 0;
  overflow: hidden;
}

.output-header {
  padding: 14px 16px 0;
}

.output-header h2 {
  margin: 0 0 10px;
  font-size: 16px;
  color: var(--muted);
}

pre.terminal {
  margin: 0;
  background: linear-gradient(180deg, color-mix(in oklab, var(--code-bg) 92%, transparent) 0%, var(--code-bg) 100%);
  color: var(--ansi-fg);
  padding: 16px;
  overflow: auto;
  border-top: 1px solid var(--border);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 13px;
  line-height: 1.45;
  border-radius: 0 0 14px 14px;
  /* Preserve alignment of ASCII tables; allow horizontal scroll instead of wrapping */
  white-space: pre;
}

/* Validation */
.input-error {
  border-color: var(--ansi-bright-red) !important;
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--ansi-bright-red) 20%, transparent) !important;
}

.error-msg {
  color: var(--ansi-bright-red);
  font-size: 12px;
  margin-top: 2px;
  min-height: 1em;
}

.help-inline {
  color: var(--muted);
  font-size: 12px;
  margin-top: 1px;
}