/* ============================================================
   chmod-calculator — Dark Emerald PCB Theme
   ============================================================ */

:root {
  --chmod-bg: #0a0d0b;
  --chmod-accent: #10b981;
  --chmod-accent-soft: #34d399;
  --chmod-border: rgba(16, 185, 129, 0.2);
  --chmod-border-strong: rgba(16, 185, 129, 0.45);
  --chmod-surface: rgba(10, 20, 15, 0.96);
  --chmod-surface-2: rgba(14, 26, 20, 0.94);
  --chmod-text: #d1fae5;
  --chmod-text-muted: rgba(209, 250, 229, 0.5);
  --chmod-toggle-off-bg: rgba(10, 20, 15, 0.8);
  --chmod-toggle-off-text: rgba(209, 250, 229, 0.35);
  --chmod-danger: rgba(245, 158, 11, 0.15);
  --chmod-danger-border: rgba(245, 158, 11, 0.5);
}

/* ============================================================
   Page-level overrides
   ============================================================ */

.chmod-calculator-page {
  background: var(--chmod-bg);
}

.chmod-calculator-page .tool-frame {
  max-width: 880px;
}

.chmod-calculator-page .tool-header-block {
  max-width: 640px;
}

.chmod-calculator-page .page-title {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  line-height: 1;
  color: var(--chmod-accent-soft);
}

.chmod-calculator-page .page-subtitle {
  max-width: 48ch;
  color: var(--chmod-text-muted);
}

/* ============================================================
   Tool shell wrapper
   ============================================================ */

.chmod-ui {
  width: 100%;
}

/* ============================================================
   Workbench — PCB background texture
   ============================================================ */

.chmod-workbench {
  position: relative;
  border: 1px solid var(--chmod-border-strong);
  border-radius: 20px;
  background-color: var(--chmod-bg);
  /* PCB: grid lines + solder pads at intersections */
  background-image:
    linear-gradient(rgba(16, 185, 129, 0.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 185, 129, 0.09) 1px, transparent 1px),
    radial-gradient(circle, rgba(16, 185, 129, 0.28) 1.5px, transparent 1.5px);
  background-size: 32px 32px, 32px 32px, 32px 32px;
  background-position: 0 0, 0 0, 0 0;
  overflow: hidden;
  transition: box-shadow 0.3s ease;
  box-shadow: 0 0 0 1px rgba(16, 185, 129, 0.08), 0 20px 60px rgba(0, 0, 0, 0.5);
}

/* PCB circuit trace — top edge glow bar */
.chmod-workbench::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--chmod-accent) 15%,
    var(--chmod-accent-soft) 50%,
    var(--chmod-accent) 85%,
    transparent 100%
  );
  opacity: 0.85;
  z-index: 1;
}

/* PCB circuit trace — corner L-shape decorations */
.chmod-workbench::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    /* top-left corner L */
    linear-gradient(var(--chmod-accent), var(--chmod-accent)) 18px 28px / 2px 44px no-repeat,
    linear-gradient(var(--chmod-accent), var(--chmod-accent)) 18px 28px / 44px 2px no-repeat,
    /* top-right corner L */
    linear-gradient(var(--chmod-accent), var(--chmod-accent)) calc(100% - 18px) 28px / 2px 44px no-repeat,
    linear-gradient(var(--chmod-accent), var(--chmod-accent)) calc(100% - 62px) 28px / 44px 2px no-repeat,
    /* bottom-left corner L */
    linear-gradient(var(--chmod-accent), var(--chmod-accent)) 18px calc(100% - 28px) / 2px 44px no-repeat,
    linear-gradient(var(--chmod-accent), var(--chmod-accent)) 18px calc(100% - 28px) / 44px 2px no-repeat,
    /* bottom-right corner L */
    linear-gradient(var(--chmod-accent), var(--chmod-accent)) calc(100% - 18px) calc(100% - 28px) / 2px 44px no-repeat,
    linear-gradient(var(--chmod-accent), var(--chmod-accent)) calc(100% - 62px) calc(100% - 28px) / 44px 2px no-repeat;
  opacity: 0.28;
  pointer-events: none;
  z-index: 1;
}

/* Danger glow: 777 */
.chmod-workbench--danger {
  animation: danger-pulse 2s ease-in-out infinite;
}

@keyframes danger-pulse {
  0%, 100% {
    box-shadow:
      0 0 0 1px var(--chmod-danger-border),
      0 0 24px var(--chmod-danger),
      inset 0 0 40px var(--chmod-danger);
  }
  50% {
    box-shadow:
      0 0 0 1px rgba(245, 158, 11, 0.7),
      0 0 48px rgba(245, 158, 11, 0.25),
      inset 0 0 60px rgba(245, 158, 11, 0.2);
  }
}

/* ============================================================
   Deckbar
   ============================================================ */

.chmod-deckbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  padding: 16px 28px 14px;
  border-bottom: 1px solid var(--chmod-border);
  background: var(--chmod-surface-2);
}

.chmod-deckbar__eyebrow {
  margin: 0;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--chmod-accent);
}

.chmod-deckbar__title {
  margin: 2px 0 0;
  font-size: 0.82rem;
  color: var(--chmod-text-muted);
}

.chmod-deckbar__meta {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

/* ============================================================
   Chips
   ============================================================ */

.chmod-chip {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border: 1px solid var(--chmod-border);
  border-radius: 999px;
  background: var(--chmod-surface);
  color: var(--chmod-text-muted);
  font-size: 0.72rem;
  font-family: inherit;
  letter-spacing: 0.04em;
  white-space: nowrap;
  cursor: default;
  user-select: none;
}

.chmod-chip--local {
  border-color: rgba(16, 185, 129, 0.3);
  color: var(--chmod-accent-soft);
}

.chmod-chip--btn {
  cursor: pointer;
  border-color: var(--chmod-border-strong);
  color: var(--chmod-accent-soft);
  background: var(--chmod-surface-2);
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.chmod-chip--btn:hover {
  background: rgba(16, 185, 129, 0.12);
  border-color: var(--chmod-accent);
  color: #fff;
}

.chmod-chip--btn:focus-visible {
  outline: 2px solid var(--chmod-accent);
  outline-offset: 2px;
}

/* ============================================================
   Body layout
   ============================================================ */

.chmod-body {
  display: flex;
  justify-content: center;
  gap: 32px;
  padding: 28px 28px 32px;
  align-items: flex-start;
}

.chmod-left {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.chmod-right {
  flex: 0 0 300px;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* ============================================================
   Permission Matrix
   ============================================================ */

.chmod-matrix {
  /* intentional wrapper for aria */
}

.chmod-matrix__grid {
  display: grid;
  grid-template-columns: auto repeat(3, 1fr);
  gap: 8px;
  align-items: center;
}

.chmod-matrix__cell {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--chmod-text-muted);
  padding: 4px 2px;
}

.chmod-matrix__cell--corner {
  /* empty top-left corner */
  min-width: 72px;
}

.chmod-matrix__cell--header {
  color: var(--chmod-accent);
  font-size: 0.72rem;
  min-width: 68px;
  justify-content: center;
}

.chmod-matrix__cell--row-label {
  justify-content: flex-start;
  padding-right: 10px;
  color: var(--chmod-text-muted);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

/* ============================================================
   Toggle buttons
   ============================================================ */

.chmod-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 48px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-family: 'Courier New', Courier, monospace;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition:
    background 0.12s ease,
    color 0.12s ease,
    box-shadow 0.12s ease,
    border-color 0.12s ease;
  /* off state */
  background: var(--chmod-toggle-off-bg);
  color: rgba(209, 250, 229, 0.55);
  border-color: rgba(16, 185, 129, 0.18);
  min-height: 0;
  user-select: none;
}

.chmod-toggle[aria-pressed="true"] {
  background: rgba(16, 185, 129, 0.18);
  color: var(--chmod-accent-soft);
  border-color: var(--chmod-accent);
  box-shadow:
    0 0 0 1px var(--chmod-accent),
    inset 0 0 8px rgba(16, 185, 129, 0.15),
    0 0 10px rgba(16, 185, 129, 0.12);
}

.chmod-toggle:focus-visible {
  outline: 2px solid var(--chmod-accent-soft);
  outline-offset: 2px;
}

.chmod-toggle:hover {
  border-color: var(--chmod-border-strong);
  color: var(--chmod-text);
}

.chmod-toggle[aria-pressed="true"]:hover {
  background: rgba(16, 185, 129, 0.28);
  color: #fff;
}

/* Snap animation on click */
.chmod-toggle--pressing {
  transform: scale(0.92);
  transition: transform 80ms ease;
}

/* ============================================================
   Preset chips
   ============================================================ */

.chmod-presets {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.chmod-preset {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 9px 18px;
  min-height: 0;
  border-radius: 999px;
  border: 1px solid var(--chmod-border-strong);
  background: var(--chmod-surface-2);
  color: var(--chmod-accent-soft);
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.13s, border-color 0.13s, color 0.13s;
  user-select: none;
}

.chmod-preset:hover {
  background: rgba(16, 185, 129, 0.14);
  border-color: var(--chmod-accent);
  color: #fff;
}

.chmod-preset:focus-visible {
  outline: 2px solid var(--chmod-accent);
  outline-offset: 2px;
}

/* ============================================================
   Reverse input
   ============================================================ */

.chmod-reverse {
  width: 100%;
}

.chmod-reverse__input {
  width: 100%;
  padding: 8px 12px;
  border-radius: 10px;
  border: 1px solid var(--chmod-border-strong);
  background: var(--chmod-surface);
  color: var(--chmod-text);
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
  box-sizing: border-box;
}

.chmod-reverse__input::placeholder {
  color: var(--chmod-text-muted);
}

.chmod-reverse__input:focus {
  border-color: var(--chmod-accent);
  box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.18);
}

.chmod-reverse__input[aria-invalid="true"] {
  border-color: #d97706;
  box-shadow: 0 0 0 2px rgba(217, 119, 6, 0.18);
}

.chmod-reverse__hint {
  margin: 6px 0 0;
  font-size: 0.78rem;
  line-height: 1.4;
  color: var(--chmod-text-muted);
}

.chmod-reverse__hint[data-tone="warn"] {
  color: #b45309;
}

/* ============================================================
   Output panels
   ============================================================ */

.chmod-output {
  padding: 18px 22px;
  border-radius: 14px;
  border: 1px solid var(--chmod-border);
  background: var(--chmod-surface-2);
}

.chmod-output--octal {
  border-color: rgba(16, 185, 129, 0.3);
}

.chmod-output__meta {
  margin-bottom: 6px;
}

.chmod-output__label {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--chmod-accent);
}

.chmod-output__value-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.chmod-output__number {
  font-family: 'Courier New', Courier, monospace;
  font-size: clamp(3rem, 8vw, 5rem);
  font-weight: 700;
  line-height: 1;
  color: var(--chmod-accent-soft);
  letter-spacing: 0.04em;
  text-shadow: 0 0 20px rgba(52, 211, 153, 0.3);
}

.chmod-output__symbolic {
  font-family: 'Courier New', Courier, monospace;
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--chmod-text);
  word-break: break-all;
}

/* ============================================================
   Copy button
   ============================================================ */

.chmod-copy-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 5px 14px;
  border-radius: 999px;
  border: 1px solid var(--chmod-border-strong);
  background: var(--chmod-surface);
  color: var(--chmod-text-muted);
  font-size: 0.75rem;
  font-family: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.13s, border-color 0.13s, color 0.13s;
  white-space: nowrap;
  min-height: 0;
  user-select: none;
  align-self: center;
}

.chmod-copy-btn:hover {
  background: rgba(16, 185, 129, 0.12);
  border-color: var(--chmod-accent);
  color: var(--chmod-accent-soft);
}

.chmod-copy-btn:focus-visible {
  outline: 2px solid var(--chmod-accent);
  outline-offset: 2px;
}

.chmod-copy-btn--copied {
  color: var(--chmod-accent-soft);
  border-color: var(--chmod-accent);
  background: rgba(16, 185, 129, 0.1);
}

/* ============================================================
   Context tooltip card
   ============================================================ */

.chmod-context-card {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid var(--chmod-border);
  background: var(--chmod-surface);
  min-height: 40px;
  transition: border-color 0.2s, background 0.2s;
}

.chmod-context-card--danger {
  border-color: rgba(245, 158, 11, 0.55);
  background: rgba(245, 158, 11, 0.08);
}

.chmod-context-card--danger .chmod-context__text {
  color: #fbbf24;
}

.chmod-context-card[hidden] {
  display: none;
}

.chmod-context__icon {
  font-size: 0.9rem;
  flex-shrink: 0;
  margin-top: 1px;
}

.chmod-context__text {
  font-size: 0.82rem;
  color: var(--chmod-text-muted);
  line-height: 1.5;
}

/* ============================================================
   Tool discovery section theming
   ============================================================ */

.chmod-calculator-page .tool-discovery {
  margin-top: 32px;
}

.chmod-calculator-page .tool-discovery__search-note {
  font-size: 0.8rem;
  color: var(--chmod-text-muted);
}

/* ============================================================
   Mobile layout (≤600px)
   ============================================================ */

@media (max-width: 600px) {
  /* Increase tap targets on mobile */
  .chmod-chip--btn {
    padding: 8px 14px;
    min-height: 36px;
  }

  .chmod-copy-btn {
    padding: 8px 14px;
    min-height: 36px;
    font-size: 0.8rem;
  }

  .chmod-preset {
    padding: 10px 18px;
    min-height: 36px;
  }

  .chmod-body {
    flex-direction: column;
    gap: 20px;
    padding: 16px 14px 20px;
  }

  .chmod-left {
    width: 100%;
  }

  .chmod-right {
    width: 100%;
  }

  .chmod-matrix__grid {
    gap: 5px;
  }

  .chmod-toggle {
    width: 46px;
    height: 38px;
    font-size: 0.85rem;
  }

  .chmod-matrix__cell--corner {
    min-width: 52px;
  }

  .chmod-matrix__cell--header {
    min-width: 46px;
    font-size: 0.65rem;
  }

  .chmod-output__number {
    font-size: clamp(2.6rem, 14vw, 4rem);
  }

  .chmod-output__symbolic {
    font-size: 1rem;
    letter-spacing: 0.04em;
  }

  .chmod-deckbar {
    padding: 12px 14px 10px;
  }
}

@media (max-width: 400px) {
  .chmod-toggle {
    width: 40px;
    height: 36px;
    font-size: 0.8rem;
  }

  .chmod-matrix__cell--corner {
    min-width: 44px;
  }

  .chmod-matrix__cell--header {
    min-width: 40px;
    font-size: 0.6rem;
  }
}