/* ═══════════════════════════════════════════════════════════
   TOOLKIT — components.css
   Navigation · Buttons · Cards · Forms · Toasts · Animations
   ═══════════════════════════════════════════════════════════ */

/* ── Layout Utilities ─────────────────────────────────────── */
.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 1.5rem;
  position: relative;
  z-index: 1;
}

.container--wide {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
  position: relative;
  z-index: 1;
}

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

/* ── Navigation ───────────────────────────────────────────── */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  transition: background var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.navbar.scrolled {
  background: rgba(5, 7, 15, 0.9);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 4px 32px rgba(0,0,0,0.3);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  padding: 0 2rem;
  max-width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  margin-left: auto;
}

.nav-license-link {
  align-items: center;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  display: inline-flex;
  justify-content: center;
  min-height: 2rem;
  min-width: 2rem;
  text-decoration: none;
  transition: border-color var(--transition), color var(--transition), background var(--transition);
}

.nav-license-link:hover,
.nav-license-link:focus-visible {
  background: var(--cyan-dim);
  border-color: var(--cyan);
  color: var(--cyan);
  outline: none;
}

.nav-license-link svg { display: block; }

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
}

.brand-icon {
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand-icon img {
  height: 44px;
  width: 44px;
}

.brand-name { display: flex; align-items: center; }
.brand-accent { color: var(--cyan); margin-left: 1px; }

/* ── Footer ───────────────────────────────────────────────── */
/* The footer is present on both the hub and tool pages, so its layout belongs
   in the shared component layer rather than the tool-page stylesheet. */
.footer {
  position: relative;
  z-index: 1;
  padding: 4rem 0 2rem;
  border-top: 1px solid var(--border);
  background: linear-gradient(to top, rgba(0,0,0,0.4), transparent);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 2.5rem;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}

.footer-brand .brand-name {
  display: block;
  margin-bottom: 0.5rem;
  font-size: 1.2rem;
  font-weight: 700;
}

.footer-tagline {
  max-width: 320px;
  color: var(--text-muted);
  font-size: 0.85rem;
  line-height: 1.65;
}

.footer-nav {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-link {
  color: var(--text-muted);
  font-size: 0.85rem;
  text-decoration: none;
  transition: color var(--transition);
}

.footer-link:hover { color: var(--cyan); }

.footer-nav--cols {
  display: grid;
  grid-template-columns: repeat(5, auto);
  gap: 0.5rem 2rem;
  align-items: start;
}

.footer-nav-col {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.footer-nav-cat {
  margin-bottom: 0.3rem;
  color: var(--text-muted);
  font-size: 0.67rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.footer-social {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.social-link {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.5rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  background: rgba(255,255,255,0.04);
  font-size: 0.85rem;
  font-weight: 500;
  text-decoration: none;
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.social-link:hover {
  border-color: rgba(255,255,255,0.15);
  color: var(--text-primary);
  background: rgba(255,255,255,0.08);
  transform: translateY(-1px);
}

.social-link--coffee {
  border-color: rgba(255, 186, 0, 0.25);
  color: #ffc940;
  background: rgba(255, 186, 0, 0.07);
}

.social-link--coffee:hover {
  border-color: rgba(255, 186, 0, 0.45);
  color: #ffdd00;
  background: rgba(255, 186, 0, 0.15);
  box-shadow: 0 4px 20px rgba(255, 186, 0, 0.2);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.78rem;
}

.footer-tech {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  opacity: 0.7;
}

/* ── Cards & Glass ────────────────────────────────────────── */
.card {
  border-radius: var(--radius-xl);
  padding: 2.2rem 2.4rem;
  position: relative;
  overflow: hidden;
}

.glass {
  background: var(--bg-card);
  backdrop-filter: blur(24px) saturate(200%);
  -webkit-backdrop-filter: blur(24px) saturate(200%);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.glass::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(135deg, rgba(255,255,255,0.04) 0%, transparent 50%);
  pointer-events: none;
}

.glass:hover {
  border-color: rgba(0,212,255,0.15);
  box-shadow: var(--shadow-card), 0 0 50px rgba(0,212,255,0.06);
}

/* ── Buttons ──────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.6rem;
  font-family: var(--font-sans);
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition:
    background var(--transition),
    box-shadow var(--transition),
    transform var(--transition),
    opacity var(--transition);
  text-decoration: none;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0);
  transition: background var(--transition);
}

.btn:hover::after { background: rgba(255,255,255,0.06); }
.btn:active { transform: scale(0.98); }
.btn:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; }

.btn--primary {
  background: linear-gradient(135deg, var(--cyan) 0%, var(--purple) 100%);
  color: #fff;
  box-shadow: 0 4px 20px rgba(0,212,255,0.28);
}

.btn--primary:hover {
  box-shadow: 0 6px 30px rgba(0,212,255,0.45);
  transform: translateY(-1px);
}

.btn--secondary {
  background: rgba(124,58,237,0.18);
  color: #a78bfa;
  border: 1px solid rgba(124,58,237,0.35);
}

.btn--secondary:hover {
  background: rgba(124,58,237,0.28);
  border-color: rgba(124,58,237,0.55);
}

.btn--ghost {
  background: rgba(255,255,255,0.05);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.btn--ghost:hover {
  background: rgba(255,255,255,0.1);
  color: var(--text-primary);
  border-color: rgba(255,255,255,0.15);
}

.btn--coffee {
  background: linear-gradient(135deg, #ffdd00 0%, #ffa500 100%);
  color: #1a1200;
  font-weight: 700;
  box-shadow: 0 4px 20px rgba(255, 186, 0, 0.3);
}

.btn--coffee:hover {
  box-shadow: 0 6px 30px rgba(255, 186, 0, 0.5);
  transform: translateY(-1px);
}

.btn--full { width: 100%; margin-top: 1.4rem; }
.btn--sm   { padding: 0.4rem 0.9rem; font-size: 0.8rem; }

/* Icon Button */
.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
  flex-shrink: 0;
}

.icon-btn:hover {
  background: var(--cyan-dim);
  color: var(--cyan);
  border-color: rgba(0,212,255,0.35);
}

.icon-btn:focus-visible { outline: 2px solid var(--cyan); outline-offset: 2px; }

/* Btn row */
.btn-row {
  display: flex;
  gap: 0.65rem;
  flex-wrap: wrap;
}

/* ── Form Controls ────────────────────────────────────────── */
.control-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 0.65rem;
}

.control-value {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--cyan);
  letter-spacing: 0;
  text-transform: none;
  background: var(--cyan-dim);
  padding: 0.1rem 0.55rem;
  border-radius: 6px;
}

.control-row { margin-bottom: 1.2rem; }

.form-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.form-grid--spacious { margin-bottom: 1.5rem; }
.form-grid--compact { margin-bottom: 1rem; }
.form-group--flush { margin: 0; }
.form-group--spacious { margin-bottom: 1.5rem; }

.control-cluster {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.control-cluster--end { align-items: flex-end; }
.control-cluster--start { align-items: flex-start; }
.control-cluster--spacious { gap: 1.5rem; margin-bottom: 1.5rem; }
.control-cluster--wide { gap: 2rem; }
.control-cluster__push { margin-left: auto; }

.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.action-row--top { margin-top: 1rem; }
.action-row--section { margin-top: 1.5rem; }
.card--spaced { margin-top: 1.5rem; }

/* Example starters */
.example-starter {
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  display: flex;
  gap: 0.8rem;
  margin: 0 0 1rem;
  padding: 0.75rem 0.9rem;
}

.example-starter__icon {
  color: var(--yellow);
  flex: 0 0 auto;
}

.example-starter__copy {
  color: var(--text-muted);
  flex: 1;
  font-size: 0.8rem;
  line-height: 1.4;
}

.example-starter__copy strong,
.example-starter__copy span {
  display: block;
}

.example-starter__copy strong {
  color: var(--text-primary);
  font-size: 0.84rem;
  margin-bottom: 0.08rem;
}

.example-starter__button {
  flex: 0 0 auto;
  white-space: nowrap;
}

@media (max-width: 480px) {
  .example-starter {
    align-items: flex-start;
    flex-wrap: wrap;
  }

  .example-starter__button { margin-left: 1.75rem; }
}

/* Slider */
.slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  border-radius: 4px;
  background: linear-gradient(to right, var(--cyan) 0%, var(--cyan) var(--val, 12.5%), rgba(255,255,255,0.1) var(--val, 12.5%));
  outline: none;
  cursor: pointer;
}

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--bg-base);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 12px var(--cyan-glow);
  cursor: pointer;
  transition: box-shadow var(--transition), transform var(--transition);
}

.slider::-moz-range-thumb {
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--bg-base);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 12px var(--cyan-glow);
  cursor: pointer;
}

.slider:hover::-webkit-slider-thumb,
.slider:focus::-webkit-slider-thumb {
  box-shadow: 0 0 20px var(--cyan-glow);
  transform: scale(1.15);
}

/* Textarea */
.textarea {
  width: 100%;
  padding: 0.9rem 1.1rem;
  background: rgba(0,0,0,0.35);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.87rem;
  line-height: 1.65;
  resize: vertical;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
  min-height: 120px;
}

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

.textarea:focus {
  border-color: rgba(0,212,255,0.4);
  box-shadow: 0 0 0 3px rgba(0,212,255,0.1);
}

.textarea--output {
  color: var(--text-code);
  background: rgba(0,212,255,0.03);
  border-color: rgba(0,212,255,0.12);
  cursor: default;
}

/* Input field */
.input-field {
  width: 100%;
  padding: 0.65rem 1rem;
  background: rgba(0,0,0,0.35);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.88rem;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.input-field::placeholder { color: var(--text-muted); }

.input-field:focus {
  border-color: rgba(0,212,255,0.4);
  box-shadow: 0 0 0 3px rgba(0,212,255,0.1);
}

/* File picker */
.file-picker-row {
  align-items: center;
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.file-picker {
  align-items: center;
  display: flex;
  flex: 1;
  gap: 0.7rem;
  min-width: 0;
}

.file-picker__trigger {
  flex-shrink: 0;
  gap: 0.45rem;
  white-space: nowrap;
}

.file-picker__input:focus-visible + .file-picker__trigger {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.file-picker__name {
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Color controls */
input[type="color"] {
  appearance: none;
  -webkit-appearance: none;
  overflow: hidden;
  padding: 3px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: transparent;
  cursor: pointer;
  transition: border-color var(--transition), box-shadow var(--transition);
}

input[type="color"]:hover { border-color: var(--border-hover); }

input[type="color"]:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

input[type="color"]::-webkit-color-swatch-wrapper { padding: 0; }
input[type="color"]::-webkit-color-swatch {
  border: 0;
  border-radius: calc(var(--radius-sm) - 3px);
}

input[type="color"]::-moz-color-swatch {
  border: 0;
  border-radius: calc(var(--radius-sm) - 3px);
}

.color-input {
  width: 42px;
  height: 32px;
}

.color-picker-input {
  width: 42px;
  height: 42px;
}

.color-input--large {
  width: 60px;
  height: 40px;
}

.color-input--field {
  width: 100%;
  height: 2.6rem;
  padding: 0.25rem;
}

/* Select field */
.select-field {
  width: 100%;
  padding: 0.65rem 1rem;
  background: rgba(0,0,0,0.35);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.88rem;
  outline: none;
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238892a4' stroke-width='2.5'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.9rem center;
  padding-right: 2.4rem;
  transition: border-color var(--transition);
}

.select-field:focus {
  border-color: rgba(0,212,255,0.4);
  box-shadow: 0 0 0 3px rgba(0,212,255,0.1);
}

/* Input with button */
.input-with-btn {
  display: flex;
  gap: 0.5rem;
}

.input-with-btn .input-field { flex: 1; }

/* ── Global Checkbox ───────────────────────────────────────── */
input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  min-width: 18px;
  border-radius: 5px;
  border: 2px solid var(--control-muted);
  background: transparent;
  cursor: pointer;
  position: relative;
  vertical-align: middle;
  transition: background var(--transition), border-color var(--transition);
}
input[type="checkbox"]:checked {
  background: linear-gradient(135deg, var(--cyan), var(--purple));
  border-color: transparent;
}
input[type="checkbox"]:checked::after {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  width: 5px; height: 9px;
  border-right: 2px solid #fff;
  border-bottom: 2px solid #fff;
  transform: translate(-50%, -65%) rotate(45deg);
}
input[type="checkbox"]:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* ── Global Radio ─────────────────────────────────────────── */
input[type="radio"] {
  appearance: none;
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  min-width: 18px;
  border: 2px solid var(--control-muted);
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
  position: relative;
  transition: border-color var(--transition), box-shadow var(--transition);
  vertical-align: middle;
}

input[type="radio"]:checked { border-color: var(--cyan); }

input[type="radio"]:checked::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  transform: translate(-50%, -50%);
}

input[type="radio"]:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* ── Choice groups ────────────────────────────────────────── */
.choice-options {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
}

.choice-options--spacious { gap: 1.5rem; }

.choice-options--stack {
  align-items: flex-start;
  flex-direction: column;
  gap: 0.4rem;
}

.choice-option {
  align-items: center;
  cursor: pointer;
  display: inline-flex;
  gap: 0.5rem;
  line-height: 1.35;
}

.choice-option:hover { color: var(--text-primary); }

.choice-fieldset {
  align-items: center;
  border: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 0;
  padding: 0;
}

.choice-fieldset .form-label {
  margin: 0 0.1rem 0 0;
  padding: 0;
}

/* ── Global Select ─────────────────────────────────────────── */
select {
  appearance: none;
  -webkit-appearance: none;
  background-color: var(--surface-2, #161b22);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%237d8590' stroke-width='1.8' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  border: 1px solid var(--border, #30363d);
  border-radius: var(--radius, 8px);
  color: var(--text-primary, #f0f6fc);
  cursor: pointer;
  font-family: inherit;
  font-size: 0.9rem;
  padding: 0.5rem 2.25rem 0.5rem 0.75rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}
select:hover { border-color: var(--border-hover, #484f58); }
select:focus {
  outline: none;
  border-color: var(--cyan, #00d4ff);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.15);
}
select option {
  background-color: var(--surface-2, #161b22);
  color: var(--text-primary, #f0f6fc);
}

/* ── Global Range Slider ───────────────────────────────────── */
input[type="range"] {
  appearance: none;
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: linear-gradient(
    to right,
    var(--cyan, #00d4ff) 0%,
    var(--cyan, #00d4ff) var(--val, 50%),
    var(--surface-3, #21262d) var(--val, 50%),
    var(--surface-3, #21262d) 100%
  );
  cursor: pointer;
  outline: none;
  border: none;
}
input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  -webkit-appearance: none;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--cyan, #00d4ff);
  border: 2px solid var(--bg, #0d1117);
  box-shadow: 0 0 0 2px var(--cyan, #00d4ff);
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
}
input[type="range"]::-moz-range-thumb {
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--cyan, #00d4ff);
  border: 2px solid var(--bg, #0d1117);
  box-shadow: 0 0 0 2px var(--cyan, #00d4ff);
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
}
input[type="range"]:hover::-webkit-slider-thumb,
input[type="range"]:focus::-webkit-slider-thumb {
  transform: scale(1.2);
  box-shadow: 0 0 0 4px rgba(0, 212, 255, 0.25);
}
input[type="range"]:hover::-moz-range-thumb,
input[type="range"]:focus::-moz-range-thumb {
  transform: scale(1.2);
  box-shadow: 0 0 0 4px rgba(0, 212, 255, 0.25);
}
input[type="range"]:focus { outline: none; }

/* Options Grid (checkboxes) */
.options-grid {
  border: none;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 0.65rem;
  margin: 1.4rem 0;
}

.checkbox-card {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.75rem 1rem;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition);
  user-select: none;
}

.checkbox-card:hover {
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.12);
}

.checkbox-card input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.checkbox-indicator {
  width: 18px; height: 18px;
  border-radius: 5px;
  border: 2px solid var(--control-muted);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), border-color var(--transition);
  position: relative;
}

.checkbox-card input:checked + .checkbox-indicator {
  background: linear-gradient(135deg, var(--cyan), var(--purple));
  border-color: transparent;
}

.checkbox-card input:checked + .checkbox-indicator::after {
  content: '';
  width: 5px; height: 9px;
  border-right: 2px solid #fff;
  border-bottom: 2px solid #fff;
  transform: rotate(45deg) translate(-1px, -1px);
}

.checkbox-card input:focus-visible + .checkbox-indicator {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.checkbox-card input:checked ~ .checkbox-text { color: var(--text-primary); }

.checkbox-text {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition);
}

.checkbox-text em {
  display: block;
  font-style: normal;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.1rem;
}

/* Radio cards */
.radio-card {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.55rem 1rem;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: background var(--transition), border-color var(--transition), color var(--transition);
  user-select: none;
}

.radio-card:hover { background: rgba(255,255,255,0.06); border-color: rgba(255,255,255,0.12); }

.radio-card input[type="radio"] { position: absolute; opacity: 0; pointer-events: none; }

.radio-indicator {
  width: 16px; height: 16px;
  border-radius: 50%;
  border: 2px solid var(--control-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: border-color var(--transition);
}

.radio-indicator::after {
  content: '';
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  opacity: 0;
  transition: opacity var(--transition);
}

.radio-card input:checked + .radio-indicator { border-color: var(--cyan); }
.radio-card input:checked + .radio-indicator::after { opacity: 1; }
.radio-card input:focus-visible + .radio-indicator { outline: 2px solid var(--cyan); outline-offset: 2px; }

/* ── Status Badges ────────────────────────────────────────── */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 0.2rem 0.65rem;
  border-radius: 20px;
  font-size: 0.73rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.status-badge--valid {
  background: rgba(16,217,126,0.1);
  border: 1px solid rgba(16,217,126,0.3);
  color: var(--green);
}

.status-badge--invalid {
  background: rgba(255,77,106,0.1);
  border: 1px solid rgba(255,77,106,0.3);
  color: var(--red);
}

/* ── Warning Banner ───────────────────────────────────────── */
.warning-banner {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  padding: 0.85rem 1.1rem;
  background: rgba(245, 197, 66, 0.07);
  border: 1px solid rgba(245, 197, 66, 0.25);
  border-radius: var(--radius-md);
  color: var(--yellow);
  font-size: 0.84rem;
  line-height: 1.55;
}

.warning-banner svg { flex-shrink: 0; margin-top: 1px; }
.warning-banner strong { font-weight: 700; }

/* ── Error Message ────────────────────────────────────────── */
.error-msg {
  margin-top: 0.6rem;
  font-size: 0.82rem;
  color: var(--red);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.error-msg[hidden] { display: none; }

.error-msg::before { content: '⚠'; }

/* ── Toast Notifications ──────────────────────────────────── */
#toast-container {
  position: fixed;
  bottom: 1.75rem;
  right: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  z-index: 500;
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.7rem 1.2rem;
  background: rgba(15, 20, 40, 0.92);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-primary);
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
  pointer-events: auto;
  animation: toastIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
  min-width: 220px;
  max-width: 340px;
}

.toast.toast--exit {
  animation: toastOut 0.25s ease forwards;
}

.toast--success {
  border-color: rgba(16, 217, 126, 0.35);
  background: rgba(16, 217, 126, 0.07);
}

.toast--success .toast-icon { color: var(--green); }

.toast--error {
  border-color: rgba(255, 77, 106, 0.35);
  background: rgba(255, 77, 106, 0.07);
}

.toast--error .toast-icon { color: var(--red); }
.toast-icon { font-size: 1rem; flex-shrink: 0; }

@keyframes toastIn {
  from { opacity: 0; transform: translateX(20px) scale(0.92); }
  to   { opacity: 1; transform: translateX(0) scale(1); }
}

@keyframes toastOut {
  to   { opacity: 0; transform: translateX(20px) scale(0.92); }
}

/* ── Reveal Animations ────────────────────────────────────── */
/*
 * Content must never depend on JavaScript to become visible.  The former
 * implementation started every `.reveal` item at opacity: 0, so a slow
 * script, a cached service worker update, or disabled JavaScript left whole
 * tool pages looking empty.  `nav.js` may still add `.visible`; it is now a
 * harmless enhancement instead of a visibility requirement.
 */
.reveal {
  opacity: 1;
  transform: none;
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

/* ── Misc Animations ──────────────────────────────────────── */
@keyframes fadeSlideUp {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Tool Split Layout ────────────────────────────────────── */
.tool-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.tool-divider { display: none; }

.tool-split--compact { gap: 0.8rem; }

.tool-col {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.tool-col-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.65rem;
}

.tool-col-header .control-label { margin-bottom: 0; }

/* ── Gradient Text ────────────────────────────────────────── */
.gradient-text {
  background: linear-gradient(135deg, var(--cyan) 0%, #a78bfa 50%, var(--purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  background-size: 200% 200%;
  animation: gradientShift 6s ease infinite;
}

@keyframes gradientShift {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 768px) {
  :root { --nav-h: 60px; }

  .tool-split { grid-template-columns: 1fr; }
  .card { padding: 1.5rem 1.4rem; }
  .options-grid { grid-template-columns: 1fr; }
  .footer-nav--cols { grid-template-columns: repeat(3, auto); gap: 1.5rem 1.2rem; }
  .footer-inner { flex-direction: column; gap: 1.8rem; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .footer-social { flex-direction: row; flex-wrap: wrap; }
  #toast-container { bottom: 1rem; right: 1rem; left: 1rem; }
  .toast { min-width: unset; max-width: unset; width: 100%; }
}

@media (max-width: 480px) {
  .nav-container { padding: 0 1rem; }
  .brand-icon img { height: 36px; width: 36px; }
  .form-grid { grid-template-columns: 1fr; }
  .control-cluster__push { margin-left: 0; }
  .file-picker-row { align-items: stretch; flex-direction: column; }
  .file-picker-row > .btn { justify-content: center; }
  .container { padding: 0 1rem; }
  .card { padding: 1.2rem 1rem; }
  .footer-nav--cols { grid-template-columns: repeat(2, auto); }
}

/* ── Global Command Palette ─────────────────────────────── */
html.command-palette-open { overflow: hidden; }

.command-palette {
  position: fixed;
  z-index: 1000;
  inset: 0;
  display: grid;
  place-items: start center;
  padding: min(12vh, 7rem) 1rem 1rem;
}

.command-palette[hidden] { display: none; }

.command-palette__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(3, 6, 16, 0.78);
  backdrop-filter: blur(10px);
}

.command-palette__dialog {
  position: relative;
  z-index: 1;
  width: min(100%, 680px);
  overflow: hidden;
  border: 1px solid rgba(0, 212, 255, 0.28);
  border-radius: var(--radius-lg);
  background: rgba(11, 15, 30, 0.98);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.55), 0 0 40px rgba(0, 212, 255, 0.12);
}

.command-palette__header {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 1.15rem 1.2rem 0.8rem;
}

.command-palette__icon {
  display: grid;
  width: 2.25rem;
  height: 2.25rem;
  place-items: center;
  border-radius: 0.65rem;
  color: var(--cyan);
  background: var(--cyan-dim);
  font-weight: 700;
}

.command-palette__header h2 { margin: 0; font-size: 1rem; }
.command-palette__header p { margin: 0.15rem 0 0; color: var(--text-muted); font-size: 0.78rem; }

.command-palette__header-actions {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  margin-left: auto;
}

.command-palette__close {
  margin-left: 0;
  padding: 0.25rem 0.45rem;
  border: 1px solid var(--border);
  border-radius: 0.35rem;
  color: var(--text-muted);
  background: transparent;
  cursor: pointer;
  font: inherit;
  font-size: 0.72rem;
}

.command-palette__clear {
  padding: 0.25rem 0.45rem;
  border: 0;
  color: var(--text-muted);
  background: transparent;
  cursor: pointer;
  font: inherit;
  font-size: 0.72rem;
}

.command-palette__clear:hover { color: var(--cyan); }

.command-palette__input {
  width: calc(100% - 2.4rem);
  margin: 0 1.2rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--border-hover);
  border-radius: var(--radius-sm);
  outline: none;
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
  font: inherit;
}

.command-palette__input:focus { border-color: var(--cyan); box-shadow: 0 0 0 3px var(--cyan-dim); }
.command-palette__status { min-height: 1.15rem; margin: 0.7rem 1.2rem 0.4rem; color: var(--text-muted); font-size: 0.75rem; }

.command-palette__results { max-height: min(48vh, 390px); overflow-y: auto; padding: 0 0.6rem 0.7rem; }

.command-palette__result {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 0.8rem;
  border: 0;
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  background: transparent;
  cursor: pointer;
  text-align: left;
  font: inherit;
}

.command-palette__result:hover,
.command-palette__result.is-active { background: rgba(0, 212, 255, 0.1); }

.command-palette__result-text { min-width: 0; }
.command-palette__result strong,
.command-palette__result small { display: block; }
.command-palette__result strong { font-size: 0.88rem; }
.command-palette__result small { overflow: hidden; margin-top: 0.15rem; color: var(--text-muted); font-size: 0.73rem; text-overflow: ellipsis; white-space: nowrap; }

.command-palette__category {
  flex: 0 0 auto;
  padding: 0.2rem 0.45rem;
  border: 1px solid rgba(124, 58, 237, 0.34);
  border-radius: 99px;
  color: #c4b5fd;
  font-size: 0.68rem;
}

.command-palette__empty { padding: 1.25rem; color: var(--text-muted); text-align: center; }

.command-palette__footer {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 0.75rem 1.2rem;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.7rem;
}

.command-palette kbd {
  display: inline-block;
  min-width: 1.25rem;
  margin-right: 0.15rem;
  padding: 0.08rem 0.25rem;
  border: 1px solid var(--border-hover);
  border-radius: 0.25rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  text-align: center;
}

@media (max-width: 480px) {
  .command-palette { padding-top: 1rem; }
  .command-palette__header { padding: 1rem 1rem 0.75rem; }
  .command-palette__input { width: calc(100% - 2rem); margin: 0 1rem; }
  .command-palette__status { margin-left: 1rem; }
  .command-palette__category { display: none; }
  .command-palette__footer { gap: 0.6rem; padding: 0.7rem 1rem; }
}

/* ── Persistent tool finder trigger ─────────────────────── */
.nav-command-trigger {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.38rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.03);
  cursor: pointer;
  font: inherit;
  font-size: 0.78rem;
  transition: border-color var(--transition), color var(--transition), background var(--transition);
}

.nav-command-trigger:hover,
.nav-command-trigger:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
  background: var(--cyan-dim);
  outline: none;
}

.nav-command-trigger kbd {
  padding: 0.05rem 0.22rem;
  border: 1px solid currentColor;
  border-radius: 0.25rem;
  color: inherit;
  font-family: var(--font-mono);
  font-size: 0.65rem;
}

@media (max-width: 480px) {
  .nav-command-trigger span { display: none; }
  .nav-command-trigger { padding: 0.38rem 0.48rem; }
  .nav-license-link { min-height: 1.95rem; min-width: 1.95rem; }
}

/* ── Persistent language preference ─────────────────────── */
.nav-language {
  position: relative;
  font-size: 0.75rem;
}

.nav-language__trigger {
  display: inline-flex;
  align-items: center;
  padding: 0.32rem 0.68rem;
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.018);
  cursor: pointer;
  font: inherit;
  transition: color var(--transition), background var(--transition), border-color var(--transition);
}

.nav-language__trigger:hover,
.nav-language__trigger:focus-visible,
.nav-language__trigger[aria-expanded="true"] {
  border-color: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.055);
  outline: none;
}

.nav-language__trigger::after {
  content: '⌄';
  margin-left: 0.32rem;
  color: var(--text-muted);
  font-size: 0.72rem;
  line-height: 1;
  pointer-events: none;
}

.nav-language__trigger[aria-expanded="true"]::after { transform: rotate(180deg); }

.nav-language__menu {
  position: absolute;
  z-index: 260;
  top: calc(100% + 0.45rem);
  right: 0;
  display: grid;
  min-width: 7rem;
  padding: 0.28rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 0.72rem;
  background: rgba(13, 17, 27, 0.96);
  box-shadow: 0 0.8rem 2.4rem rgba(0, 0, 0, 0.28);
  backdrop-filter: blur(18px);
}

.nav-language__menu[hidden] { display: none; }

.nav-language__option {
  width: 100%;
  padding: 0.44rem 0.52rem;
  border: 0;
  border-radius: 0.46rem;
  color: var(--text-secondary);
  background: transparent;
  cursor: pointer;
  font: inherit;
  text-align: left;
}

.nav-language__option:hover,
.nav-language__option:focus-visible,
.nav-language__option[aria-selected="true"] {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.07);
  outline: none;
}

@media (max-width: 480px) {
  .nav-language__trigger { padding: 0.38rem 0.52rem; }
}