/* ============================================
   QR-Code Generator — Style System
   ============================================ */

/* ===== Reset & Base ===== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

.hidden {
  display: none !important;
}

/* --- Design Tokens --- */
:root {
  /* Background */
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);

  --bg-primary: #0f172a;
  --bg-surface: #12121a;
  --bg-card: rgba(30, 41, 59, 0.7);
  --bg-card-hover: rgba(28, 28, 45, 0.8);
  --bg-input: rgba(255, 255, 255, 0.04);

  /* Borders */
  --border-subtle: rgba(255, 255, 255, 0.15);
  --border-accent: rgba(167, 139, 250, 0.3);
  --border-glow: rgba(167, 139, 250, 0.5);

  /* Text */
  --text-primary: #f8fafc;
  --text-secondary: #8888a0;
  --text-muted: #94a3b8;
  --text-accent: #a78bfa;

  /* Accents */
  --accent-red: #f43f5e;
  --accent-purple: #8b5cf6;
  --accent-cyan: #06b6d4;
  --accent-amber: #fbbf24;
  --accent-green: #34d399;

  /* Gradients */
  --grad-accent: linear-gradient(135deg, #a78bfa 0%, #06b6d4 100%);
  --grad-card: linear-gradient(145deg, rgba(167, 139, 250, 0.05) 0%, rgba(6, 182, 212, 0.03) 100%);
  --grad-glow: radial-gradient(ellipse at 50% 0%, rgba(167, 139, 250, 0.12) 0%, transparent 60%);

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;

  /* Radius */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-xl: 12px;

  /* Header Controls */
  --control-height: 2.4rem;
  --control-height-sm: 1.78rem;
  --control-height-xs: 1.64rem;

  /* Shadows */
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3), 0 1px 4px rgba(0, 0, 0, 0.2);
  --shadow-glow: 0 0 30px rgba(59, 130, 246, 0.08);

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Cascadia Code', 'Fira Code', monospace;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Light Theme Overrides ===== */
.light-theme {
  --bg-primary: #f1f5f9;
  --bg-card: rgba(255, 255, 255, 0.7);
  --bg-card-hover: rgba(245, 243, 255, 0.8);
  --border-subtle: rgba(148, 163, 184, 0.5);
  --text-primary: #111827;
  --text-muted: #60738f;

  --shadow-card: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-glow: 0 0 25px rgba(59, 130, 246, 0.1);

  background-image:
    radial-gradient(circle at 0% 0%, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 100% 100%, rgba(168, 85, 247, 0.1) 0%, transparent 50%);
}

body {
  background-color: var(--bg-primary);
  background-image:
    radial-gradient(circle at 0% 0%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 100% 100%, rgba(168, 85, 247, 0.15) 0%, transparent 50%);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0.5rem;
  overflow-x: hidden;
}

body::selection {
  background: var(--bg-secondary);
  color: var(--accent-purple);
}

/* ============================================
   HEADER
   ============================================ */
.header {
  width: 100%;
  max-width: 960px;
  margin-bottom: 0.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

.header-main {
  display: flex;
  align-items: center;
  gap: 16px;
}

.title {
  font-family: 'Outfit', sans-serif;
  font-size: 2.2rem;
  font-weight: 700;
  text-align: center;
  margin: 0 1rem 0.5rem;
  background: var(--gradient-primary);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.subtitle {
  font-size: 0.9rem;
  text-align: center;
  color: var(--text-muted);
  margin: 0 1rem 1rem;
}

.title-icon {
  height: 2rem;
  width: auto;
  vertical-align: middle;
  margin-right: 1rem;
  filter: drop-shadow(0 4px 12px rgba(99, 102, 241, 0.3));
  transition: transform 0.3s ease;
  animation: float 3s ease-in-out infinite;
}

.title:hover .title-icon {
  transform: scale(1.1) rotate(15deg);
}

@keyframes float {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-5px);
  }
}

/* ============================================
   THEME AND LANGUAGE SWITCHER
   ============================================ */
.theme-lang-switcher {
  position: absolute;
  top: 1.2rem;
  right: 1.2rem;
  display: flex;
  gap: 0.5rem;
  z-index: 100;
}

/* ===== THEME TOGGLE ===== */
.theme-toggle-group {
  background: var(--bg-card);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--border-subtle);
  border-radius: 999px;
  padding: 0.2rem;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.theme-toggle-btn {
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--gradient-primary);
  border: 1px solid var(--border-subtle);
  color: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  transform: translateY(0) scale(0.94);
  opacity: 0.50;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  outline: none;
}

.theme-toggle-btn svg {
  width: 16px;
  height: 16px;
  transition: transform 0.3s ease;
}

.theme-toggle-btn:hover {
  transform: translateY(-1px) scale(1.04);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
  opacity: 0.95;
}

.theme-toggle-btn:hover svg {
  transform: translateY(-1px);
}

.theme-toggle-btn:active {
  transform: scale(0.95);
}

.theme-toggle-btn:focus-visible {
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.35), 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

.theme-toggle-btn.is-active {
  opacity: 1;
  transform: translateY(-1px) scale(1);
}

.light-theme .theme-toggle-btn {
  box-shadow: 0 8px 22px rgba(59, 130, 246, 0.24);
}

.version-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  padding: 2px 10px;
  border-radius: 100px;
}

/* ===== LANGUAGE SELECTOR ===== */
.lang-select {
  box-sizing: border-box;
  background: transparent;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  height: var(--control-height);
  padding: 0 2.5rem 0 1rem;
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 500;
  transition: all 0.3s ease;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  background-size: 14px 14px;
  outline: none;
}

.lang-select:hover {
  border-color: var(--border-accent);
  color: var(--text-primary);
  transform_: translateY(-2px);
}

.lang-select:focus {
  box-shadow: 0 0 0 2px var(--shadow-glow);
}

.lang-select option {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  padding: 10px;
}

.light-theme .lang-select {
  box-shadow: 0 1px 1px rgba(59, 130, 246, 0.06);
}

/* ============================================
   MAIN
   ============================================ */
#app-main {
  flex: 1;
  position: relative;
  z-index: 1;
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
  padding: var(--space-xl);
}
/* --- Cards --- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  backdrop-filter: blur(12px);
  transition: all var(--transition-base);
  animation: fadeInUp 0.5s ease both;
}

.card:nth-child(1) { animation-delay: 0.05s; }
.card:nth-child(2) { animation-delay: 0.10s; }
.card:nth-child(3) { animation-delay: 0.15s; }
.card:nth-child(4) { animation-delay: 0.20s; }
.card:nth-child(5) { animation-delay: 0.25s; }
.card:nth-child(6) { animation-delay: 0.30s; }

.card:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--border-subtle);
  background: var(--grad-card);
}

.card-header h2 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: 0.01em;
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: 100px;
  border: 1px solid;
}

.tag-pdf {
  color: var(--accent-red);
  background: rgba(244, 63, 94, 0.1);
  border-color: rgba(244, 63, 94, 0.2);
}

.tag-pages {
  color: var(--accent-purple);
  background: rgba(139, 92, 246, 0.1);
  border-color: rgba(139, 92, 246, 0.2);
}

.tag-meta {
  color: var(--accent-cyan);
  background: rgba(6, 182, 212, 0.1);
  border-color: rgba(6, 182, 212, 0.2);
}

.card-body {
  padding: var(--space-md) var(--space-lg);
}
/* --- Empty State --- */
.empty-state {
  text-align: center;
  padding: var(--space-lg) 0;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-style: italic;
}
/* --- Animations --- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --- Scrollbar --- */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--border-subtle);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* --- Loading spinner --- */
.spinner {
  width: 48px;
  height: 48px;
  border: 3px solid var(--border-subtle);
  border-top-color: var(--accent-red);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}
/* ============================================
   FOOTER
   ============================================ */
.app-footer {
  width: 100%;
  max-width: 1100px;
  margin-top: auto;
  padding: 1.5rem 0;
  color: var(--text-muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  justify-content: center;
  position: relative;
}

.footer-content {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  width: 100%;
  padding: 0 1rem;
  color: var(--text-muted);
}

.footer-title {
  font-weight: 500;
  font-size: 0.85rem;
}

.footer-separator {
  color: var(--border-subtle);
  user-select: none;
}

.footer-content a {
  color: #a78bfa;
  text-decoration: none;
  font-size: 0.85rem;
  transition: all 0.2s ease;
}

.footer-content a:hover {
  color: #764ba2;
  filter: brightness(1.2);
}

/* ============================================
   SCROLL-TO-TOP BUTTON
   ============================================ */
.scroll-top-btn {
  position: fixed;
  right: 2rem;
  bottom: 2rem;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--gradient-primary);
  border: 1px solid var(--border-subtle);
  color: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 1000;
}

.scroll-top-btn.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.scroll-top-btn svg {
  transition: transform 0.3s ease;
}

.scroll-top-btn:hover {
  transform: translateY(-5px) scale(1.1);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
}

.scroll-top-btn:hover svg {
  transform: translateY(-2px);
}

.scroll-top-btn:active {
  transform: scale(0.95);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 960px) {
  .theme-lang-switcher {
    top: 0.55rem;
    left: 50%;
    right: auto;
    transform: translateX(-50%);
    gap: 0.4rem;
  }

  .header {
    padding-top: 3.1rem;
  }

  .title {
    font-size: 1.8rem;
    line-height: 1.2;
  }
}

@media (max-width: 800px) {
  .theme-lang-switcher {
    top: 0.5rem;
    left: 50%;
    right: auto;
    transform: translateX(-50%);
    gap: 0.35rem;
  }

  .theme-toggle-group {
    height: var(--control-height-sm);
    padding: 0 0.16rem;
    gap: 0.22rem;
  }

  .theme-toggle-btn {
    width: 1.72rem;
    height: 1.72rem;
  }

  .theme-toggle-btn svg {
    width: 13px;
    height: 13px;
  }

  .lang-select {
    height: var(--control-height-sm);
    font-size: 0.82rem;
    padding: 0 2.2rem 0 0.7rem;
    background-position: right 0.6rem center;
  }

  .header-inner {
    padding: var(--space-sm) var(--space-md);
  }

  .logo h1 {
    font-size: 1rem;
  }

  #drop-zone {
    padding: var(--space-xl) var(--space-md);
  }

  .drop-title {
    font-size: 1rem;
  }
}

@media (max-width: 380px) {
  .theme-lang-switcher {
    top: 0.45rem;
    left: 50%;
    right: auto;
    transform: translateX(-50%);
  }

  .theme-toggle-btn {
    width: 1.58rem;
    height: 1.58rem;
  }

  .lang-select {
    height: var(--control-height-xs);
    max-width: 7.9rem;
    font-size: 0.78rem;
  }

  .theme-toggle-group {
    height: var(--control-height-xs);
  }
}

/* ============================================
   GENERATOR LAYOUT
   ============================================ */
.light-theme {
  --bg-input: rgba(255, 255, 255, 0.75);
}

.generator-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  gap: var(--space-lg);
  align-items: start;
}

.settings-column,
.preview-column {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  min-width: 0;
}

.preview-column {
  position: sticky;
  top: var(--space-lg);
}

.card {
  animation: none;
}

.card-body > .field:last-child,
.card-body > .field-row:last-child {
  margin-bottom: 0;
}

/* ===== Form controls ===== */
.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: var(--space-md);
  min-width: 0;
}

.field > label,
.field-label {
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
  display: flex;
  justify-content: space-between;
  gap: var(--space-sm);
}

.field input[type="text"],
.field input[type="url"],
.field input[type="email"],
.field input[type="tel"],
.field input[type="number"],
.field input[type="datetime-local"],
.field textarea,
select.input {
  width: 100%;
  min-width: 0;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  padding: 9px 12px;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 500;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  color-scheme: dark;
}

.light-theme .field input,
.light-theme .field textarea,
.light-theme select.input {
  color-scheme: light;
}

.field input:focus,
.field textarea:focus,
select.input:focus {
  border-color: var(--border-glow);
  box-shadow: 0 0 0 3px rgba(167, 139, 250, 0.15);
}

.field textarea {
  min-height: 84px;
  resize: vertical;
  line-height: 1.5;
}

select.input {
  appearance: none;
  -webkit-appearance: none;
  padding-right: 2.2rem;
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.7rem center;
  background-size: 14px 14px;
}

select.input option {
  background-color: var(--bg-primary);
  color: var(--text-primary);
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 var(--space-md);
}

.field-row-3 {
  grid-template-columns: 1fr 1fr 1fr;
}

.fields {
  display: none;
}

.fields.active {
  display: block;
  animation: fadeInUp 0.3s ease both;
}

.check {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.84rem;
  color: var(--text-primary);
  cursor: pointer;
  user-select: none;
}

.check input {
  accent-color: var(--accent-purple);
  width: 16px;
  height: 16px;
  margin: 0;
  cursor: pointer;
}

.check-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm) var(--space-lg);
  margin-bottom: var(--space-md);
}

.range-field input[type="range"] {
  width: 100%;
  accent-color: var(--accent-purple);
  cursor: pointer;
  margin: 4px 0;
}

.range-value {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-muted);
  white-space: nowrap;
}

.color-field {
  display: flex;
  align-items: center;
  gap: 10px;
}

.color-field input[type="color"] {
  width: 44px;
  height: 34px;
  padding: 2px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  background: var(--bg-input);
  cursor: pointer;
}

.color-field input[type="color"]:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.color-hex {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-muted);
}

.mono {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
}

.hint {
  font-size: 0.76rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-top: var(--space-sm);
}

.hint-top {
  margin-top: 0;
  margin-bottom: var(--space-md);
}

/* ===== Type selection ===== */
.type-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
  margin-bottom: var(--space-md);
}

.type-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 4px;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  min-width: 0;
}

.type-btn span {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}

.type-btn svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.type-btn:hover {
  border-color: var(--border-accent);
  color: var(--text-primary);
  transform: translateY(-1px);
}

.type-btn[aria-checked="true"] {
  background: linear-gradient(135deg, rgba(167, 139, 250, 0.2) 0%, rgba(6, 182, 212, 0.12) 100%);
  border-color: var(--border-glow);
  color: var(--text-primary);
}

.tag-type,
.tag-info {
  color: var(--accent-cyan);
  background: rgba(6, 182, 212, 0.1);
  border-color: rgba(6, 182, 212, 0.2);
}

/* ===== Picker grids (shapes, eyes, icons) ===== */
.pick-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(54px, 1fr));
  gap: 8px;
}

.pick-grid-small {
  grid-template-columns: repeat(auto-fill, minmax(44px, 1fr));
}

.pick-btn {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 9px;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
  min-width: 0;
}

.pick-btn svg {
  width: 100%;
  height: 100%;
  display: block;
}

.pick-btn:hover {
  border-color: var(--border-accent);
  transform: translateY(-1px);
}

.pick-btn[aria-checked="true"] {
  border-color: var(--border-glow);
  box-shadow: 0 0 0 2px rgba(167, 139, 250, 0.3);
  color: var(--text-accent);
}

.pick-grid-brands,
.pick-grid-symbols {
  margin-top: var(--space-md);
}

.pick-grid-brands .pick-btn,
.pick-grid-symbols .pick-btn {
  padding: 7px;
}

.pick-grid-brands .pick-btn svg,
.pick-grid-symbols .pick-btn svg {
  border-radius: 8px;
}

/* ===== Segmented control ===== */
.segmented {
  display: flex;
  gap: 3px;
  padding: 3px;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: 999px;
}

.segmented button {
  flex: 1;
  border: 0;
  background: transparent;
  color: var(--text-secondary);
  padding: 7px 8px;
  border-radius: 999px;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
}

.segmented button:hover {
  color: var(--text-primary);
}

.segmented button[aria-checked="true"] {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(102, 126, 234, 0.35);
}

/* ===== Logo upload ===== */
.logo-panel {
  margin-top: var(--space-md);
}

.logo-drop {
  border: 2px dashed var(--border-accent);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  text-align: center;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all var(--transition-base);
  outline: none;
}

.logo-drop:hover,
.logo-drop:focus-visible {
  border-color: var(--border-glow);
  background: var(--bg-card-hover);
}

.logo-drop.drag-over {
  border-color: var(--accent-cyan);
  background: rgba(6, 182, 212, 0.08);
}

.logo-drop svg {
  color: var(--text-muted);
  margin-bottom: 6px;
}

.drop-title-small {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
}

.drop-formats {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 4px;
}

#logo-drop-preview {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
}

#logo-drop-preview.hidden {
  display: none;
}

.logo-thumb {
  width: 72px;
  height: 72px;
  object-fit: contain;
  border-radius: var(--radius-md);
  background: repeating-conic-gradient(rgba(128, 128, 128, 0.35) 0 25%, transparent 0 50%) 0 0 / 12px 12px;
}

.logo-options {
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--border-subtle);
}

/* ===== Payload details ===== */
.payload-details {
  margin-top: var(--space-sm);
}

.payload-details summary {
  cursor: pointer;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-secondary);
  display: flex;
  justify-content: space-between;
  gap: var(--space-sm);
  list-style: none;
  padding: 6px 0;
}

.payload-details summary::-webkit-details-marker {
  display: none;
}

.payload-details summary > span:first-child::before {
  content: '▸ ';
}

.payload-details[open] summary > span:first-child::before {
  content: '▾ ';
}

.payload-details pre {
  margin-top: 6px;
  padding: 10px 12px;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 150px;
  overflow: auto;
  color: var(--text-primary);
}

/* ===== Preview ===== */
.qr-preview {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: var(--space-md);
  background: var(--bg-card-hover);
  border-radius: var(--radius-md);
  min-height: 200px;
}

.qr-preview svg {
  width: 100%;
  max-width: 400px;
  height: auto;
  border-radius: var(--radius-sm);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.25);
}

.qr-preview.checker svg {
  background: repeating-conic-gradient(rgba(128, 128, 128, 0.25) 0 25%, transparent 0 50%) 0 0 / 18px 18px;
}

.readability {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: var(--space-md);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
}

.readability.hidden {
  display: none;
}

.readability .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 10px var(--accent-green);
  flex-shrink: 0;
}

.readability.warn .dot {
  background: var(--accent-amber);
  box-shadow: 0 0 10px var(--accent-amber);
}

.readability.bad .dot {
  background: var(--accent-red);
  box-shadow: 0 0 10px var(--accent-red);
}

.reasons {
  list-style: disc;
  margin: 6px 0 0;
  padding-left: 28px;
  font-size: 0.76rem;
  line-height: 1.5;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.reasons:empty {
  display: none;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: 999px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-input);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.84rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn:hover {
  border-color: var(--border-accent);
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-1px);
}

.light-theme .btn:hover {
  background: rgba(99, 102, 241, 0.08);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-primary {
  background: var(--gradient-primary);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 6px 20px rgba(102, 126, 234, 0.3);
}

.btn-primary:hover {
  background: var(--gradient-primary);
  filter: brightness(1.08);
}

.btn-small {
  padding: 6px 12px;
  font-size: 0.76rem;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.btn-row .btn-primary {
  flex: 1;
  min-width: 90px;
}

/* ===== Toast ===== */
.toast {
  position: fixed;
  left: 50%;
  bottom: 5rem;
  transform: translateX(-50%) translateY(20px);
  width: max-content;
  max-width: min(90vw, 480px);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(12px);
  color: var(--text-primary);
  padding: 10px 18px;
  border-radius: var(--radius-lg);
  font-size: 0.84rem;
  line-height: 1.4;
  text-align: center;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 1200;
  box-shadow: var(--shadow-card);
}

.toast.show {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.toast.error {
  border-color: rgba(244, 63, 94, 0.5);
}

/* ===== Responsive ===== */
@media (max-width: 960px) {
  .generator-layout {
    grid-template-columns: 1fr;
  }

  .preview-column {
    position: static;
    order: -1;
  }

  #app-main {
    padding: var(--space-md);
  }
}

@media (max-width: 640px) {
  .type-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .field-row,
  .field-row-3 {
    grid-template-columns: 1fr;
  }

  .segmented {
    flex-wrap: wrap;
    border-radius: var(--radius-lg);
  }

  .segmented button {
    flex: 1 1 45%;
  }

  .btn-row .btn {
    flex: 1 1 auto;
  }
}