/**
 * YouTube Tag Generator — mobile-first premium SaaS UI
 */

.ytg-root {
  --ytg-font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --ytg-radius: 14px;
  --ytg-radius-sm: 10px;
  --ytg-radius-lg: 20px;
  --ytg-shadow: 0 4px 24px rgba(15, 23, 42, 0.08);
  --ytg-shadow-lg: 0 12px 40px rgba(15, 23, 42, 0.12);
  --ytg-transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);

  /* Light theme */
  --ytg-bg: #f8fafc;
  --ytg-surface: #ffffff;
  --ytg-surface-2: #f1f5f9;
  --ytg-border: #e2e8f0;
  --ytg-text: #0f172a;
  --ytg-text-muted: #64748b;
  --ytg-accent: #ff0000;
  --ytg-accent-hover: #cc0000;
  --ytg-accent-soft: rgba(255, 0, 0, 0.08);
  --ytg-gradient: linear-gradient(135deg, #ff0000 0%, #cc0000 50%, #990000 100%);
  --ytg-gradient-soft: linear-gradient(135deg, rgba(255, 0, 0, 0.06) 0%, rgba(204, 0, 0, 0.04) 100%);
  --ytg-glass: rgba(255, 255, 255, 0.72);
  --ytg-tag-bg: #f1f5f9;
  --ytg-tag-hover: #e2e8f0;
  --ytg-success: #16a34a;
  --ytg-error: #dc2626;

  font-family: var(--ytg-font);
  font-size: 16px;
  line-height: 1.5;
  color: var(--ytg-text);
  background: var(--ytg-gradient-soft);
  border: 1px solid var(--ytg-border);
  border-radius: var(--ytg-radius-lg);
  padding: 1.25rem;
  margin: 1.5rem 0;
  box-shadow: var(--ytg-shadow);
  max-width: 720px;
  position: relative;
  overflow: hidden;
}

.ytg-root::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(255, 0, 0, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

/* Dark theme */
.ytg-root[data-ytg-active-theme="dark"] {
  --ytg-bg: #0f172a;
  --ytg-surface: #1e293b;
  --ytg-surface-2: #334155;
  --ytg-border: #334155;
  --ytg-text: #f1f5f9;
  --ytg-text-muted: #94a3b8;
  --ytg-accent-soft: rgba(255, 0, 0, 0.15);
  --ytg-gradient-soft: linear-gradient(135deg, rgba(255, 0, 0, 0.1) 0%, rgba(15, 23, 42, 0.5) 100%);
  --ytg-glass: rgba(30, 41, 59, 0.85);
  --ytg-tag-bg: #334155;
  --ytg-tag-hover: #475569;
  --ytg-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

@media (prefers-color-scheme: dark) {
  .ytg-root[data-ytg-theme="auto"]:not([data-ytg-active-theme="light"]) {
    --ytg-bg: #0f172a;
    --ytg-surface: #1e293b;
    --ytg-surface-2: #334155;
    --ytg-border: #334155;
    --ytg-text: #f1f5f9;
    --ytg-text-muted: #94a3b8;
    --ytg-accent-soft: rgba(255, 0, 0, 0.15);
    --ytg-gradient-soft: linear-gradient(135deg, rgba(255, 0, 0, 0.1) 0%, rgba(15, 23, 42, 0.5) 100%);
    --ytg-glass: rgba(30, 41, 59, 0.85);
    --ytg-tag-bg: #334155;
    --ytg-tag-hover: #475569;
  }
}

/* Header */
.ytg-header {
  margin-bottom: 1.5rem;
  position: relative;
}

.ytg-header__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ytg-accent);
  background: var(--ytg-accent-soft);
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  margin-bottom: 0.75rem;
}

.ytg-header__title {
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.2;
  margin: 0 0 0.5rem;
  letter-spacing: -0.02em;
}

.ytg-header__subtitle {
  font-size: 0.9375rem;
  color: var(--ytg-text-muted);
  margin: 0;
  max-width: 36ch;
}

/* Form */
.ytg-form {
  margin-bottom: 1rem;
}

.ytg-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.ytg-input-wrap {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.ytg-input {
  width: 100%;
  min-height: 52px;
  padding: 0.875rem 1rem;
  font-size: 1rem;
  font-family: inherit;
  color: var(--ytg-text);
  background: var(--ytg-surface);
  border: 2px solid var(--ytg-border);
  border-radius: var(--ytg-radius);
  transition: border-color var(--ytg-transition), box-shadow var(--ytg-transition);
  box-sizing: border-box;
}

.ytg-input:focus {
  outline: none;
  border-color: var(--ytg-accent);
  box-shadow: 0 0 0 3px var(--ytg-accent-soft);
}

.ytg-input::placeholder {
  color: var(--ytg-text-muted);
  opacity: 0.8;
}

.ytg-hint {
  font-size: 0.8125rem;
  color: var(--ytg-text-muted);
  margin: 0.5rem 0 0;
}

.ytg-error {
  font-size: 0.875rem;
  color: var(--ytg-error);
  margin: 0.5rem 0 0;
  padding: 0.5rem 0.75rem;
  background: rgba(220, 38, 38, 0.08);
  border-radius: var(--ytg-radius-sm);
}

/* Buttons */
.ytg-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 48px;
  padding: 0.75rem 1.25rem;
  font-size: 0.9375rem;
  font-weight: 600;
  font-family: inherit;
  border: none;
  border-radius: var(--ytg-radius);
  cursor: pointer;
  transition: transform var(--ytg-transition), box-shadow var(--ytg-transition), background var(--ytg-transition);
  -webkit-tap-highlight-color: transparent;
}

.ytg-btn:active {
  transform: scale(0.98);
}

.ytg-btn--primary {
  color: #fff;
  background: var(--ytg-gradient);
  box-shadow: 0 4px 14px rgba(255, 0, 0, 0.35);
}

.ytg-btn--primary:hover {
  box-shadow: 0 6px 20px rgba(255, 0, 0, 0.45);
}

.ytg-btn--secondary {
  color: var(--ytg-text);
  background: var(--ytg-surface);
  border: 2px solid var(--ytg-border);
}

.ytg-btn--secondary:hover {
  border-color: var(--ytg-accent);
  color: var(--ytg-accent);
}

.ytg-btn--ghost {
  background: transparent;
  color: var(--ytg-text-muted);
  min-width: 44px;
  min-height: 44px;
  padding: 0.5rem;
}

.ytg-btn--ghost:hover {
  color: var(--ytg-text);
  background: var(--ytg-surface-2);
}

.ytg-btn--block {
  width: 100%;
}

.ytg-btn--generate {
  position: relative;
}

.ytg-btn--loading .ytg-btn__text {
  opacity: 0;
}

.ytg-btn--loading .ytg-btn__loader {
  display: block;
}

.ytg-btn__loader {
  display: none;
  position: absolute;
  width: 22px;
  height: 22px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: ytg-spin 0.7s linear infinite;
}

.ytg-btn--copied {
  background: var(--ytg-success) !important;
  box-shadow: none !important;
}

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

/* Theme toggle icons */
.ytg-root[data-ytg-active-theme="light"] .ytg-icon-moon,
.ytg-root[data-ytg-active-theme="dark"] .ytg-icon-sun {
  display: none;
}

/* Toolbar & stats */
.ytg-toolbar {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1rem;
  background: var(--ytg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--ytg-border);
  border-radius: var(--ytg-radius);
  margin-bottom: 1.25rem;
}

.ytg-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  text-align: center;
}

.ytg-stat__value {
  display: block;
  font-size: 1.375rem;
  font-weight: 700;
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
}

.ytg-stat__label {
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ytg-text-muted);
}

.ytg-score--excellent { color: #16a34a; }
.ytg-score--good { color: #2563eb; }
.ytg-score--fair { color: #d97706; }
.ytg-score--low { color: #dc2626; }

.ytg-toolbar__actions {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.ytg-toolbar__actions .ytg-btn--secondary {
  flex: 1;
}

/* Results sections */
.ytg-results {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.ytg-section {
  background: var(--ytg-surface);
  border: 1px solid var(--ytg-border);
  border-radius: var(--ytg-radius);
  padding: 1rem 1.125rem;
  animation: ytg-fade-in 0.35s ease backwards;
}

.ytg-section__title {
  font-size: 0.9375rem;
  font-weight: 700;
  margin: 0 0 0.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.ytg-section__title::before {
  content: "";
  width: 4px;
  height: 1em;
  background: var(--ytg-gradient);
  border-radius: 2px;
}

.ytg-section__desc {
  font-size: 0.8125rem;
  color: var(--ytg-text-muted);
  margin: 0 0 0.75rem;
}

/* Tag chips */
.ytg-tags {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.ytg-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--ytg-tag-bg);
  border-radius: 999px;
  padding: 0.4rem 0.5rem 0.4rem 0.875rem;
  font-size: 0.8125rem;
  font-weight: 500;
  animation: ytg-tag-in 0.3s ease backwards;
  transition: background var(--ytg-transition), transform var(--ytg-transition);
}

.ytg-tag:hover {
  background: var(--ytg-tag-hover);
}

.ytg-tag--copied {
  background: rgba(22, 163, 74, 0.2) !important;
  transform: scale(1.02);
}

.ytg-tag__text {
  max-width: 220px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ytg-tag__copy {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  min-width: 28px;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: transparent;
  color: var(--ytg-text-muted);
  cursor: pointer;
  transition: color var(--ytg-transition), background var(--ytg-transition);
}

.ytg-tag__copy:hover {
  color: var(--ytg-accent);
  background: var(--ytg-accent-soft);
}

/* Mobile sticky bar */
.ytg-mobile-bar {
  position: sticky;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 0.75rem 0 0;
  margin-top: 0.5rem;
  background: linear-gradient(to top, var(--ytg-bg) 60%, transparent);
  z-index: 10;
}

/* Animations */
@keyframes ytg-fade-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes ytg-tag-in {
  from { opacity: 0; transform: scale(0.92); }
  to { opacity: 1; transform: scale(1); }
}

/* Tablet+ */
@media (min-width: 540px) {
  .ytg-root {
    padding: 1.75rem 2rem;
  }

  .ytg-header__title {
    font-size: 1.75rem;
  }

  .ytg-input-wrap {
    flex-direction: row;
    align-items: stretch;
  }

  .ytg-input {
    flex: 1;
  }

  .ytg-btn--generate {
    min-width: 160px;
    flex-shrink: 0;
  }

  .ytg-toolbar {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }

  .ytg-stats {
    flex: 1;
    max-width: 280px;
  }

  .ytg-toolbar__actions {
    flex-shrink: 0;
  }

  .ytg-mobile-bar {
    display: none;
  }
}

@media (min-width: 720px) {
  .ytg-root {
    max-width: 800px;
  }

  .ytg-tag__text {
    max-width: 320px;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .ytg-tag,
  .ytg-section,
  .ytg-btn {
    animation: none !important;
    transition: none !important;
  }
}

/* Focus visible for a11y */
.ytg-btn:focus-visible,
.ytg-input:focus-visible,
.ytg-tag__copy:focus-visible {
  outline: 2px solid var(--ytg-accent);
  outline-offset: 2px;
}

/* WordPress theme overrides — prevent bleed */
.ytg-root *,
.ytg-root *::before,
.ytg-root *::after {
  box-sizing: border-box;
}

.ytg-root button {
  font-family: inherit;
}