/* ==========================================================================
   Pulpie WebGPU - Modern Dark Sleek Vercel-Inspired Styling
   Palette: Dark charcoal surfaces, crisp white text, restrained accents.
   Strict rules: NO gradient text, NO glow accents, full mobile accessibility.
   ========================================================================== */

:root {
  --bg-canvas: #0c0d10;
  --bg-surface: #14161b;
  --bg-surface-elevated: #1a1c23;
  --bg-surface-hover: #222530;
  --bg-input: #101115;
  --border-subtle: #242732;
  --border-strong: #333847;
  --border-focus: #f97316;

  --text-primary: #f4f4f7;
  --text-secondary: #9da1b0;
  --text-muted: #676b7b;
  --text-inverse: #0c0d10;

  --accent-orange: #ea580c;
  --accent-orange-hover: #f97316;
  --accent-green: #10b981;
  --accent-red: #ef4444;
  --accent-amber: #f59e0b;

  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  --transition-fast: 150ms ease;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-sans);
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Layout */
.app-layout {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Header */
.app-header {
  border-bottom: 1px solid var(--border-subtle);
  background-color: var(--bg-canvas);
  position: sticky;
  top: 0;
  z-index: 40;
}

.header-content {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-logo {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-orange);
  flex-shrink: 0;
}

.brand-title-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.brand-name {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.badge {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.125rem 0.5rem;
  border-radius: 9999px;
  font-family: var(--font-mono);
}

.badge-model {
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

.badge-gpu {
  background-color: rgba(234, 88, 12, 0.15);
  border: 1px solid var(--accent-orange);
  color: var(--accent-orange-hover);
}

.brand-tagline {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.header-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

/* Device Status Pill */
.device-status {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 0.75rem;
  border-radius: 9999px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--text-muted);
  flex-shrink: 0;
}

.status-dot.status-ready { background-color: var(--accent-green); }
.status-dot.status-warning { background-color: var(--accent-amber); }
.status-dot.status-busy { background-color: var(--accent-amber); }
.status-dot.status-error { background-color: var(--accent-red); }

.badge-wasm {
  background-color: rgba(56, 189, 248, 0.15);
  border: 1px solid rgba(56, 189, 248, 0.4);
  color: #38bdf8;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: 1px solid transparent;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), opacity var(--transition-fast);
  text-decoration: none;
  touch-action: manipulation;
  white-space: nowrap;
}

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

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background-color: var(--accent-orange);
  color: #ffffff;
  border-color: var(--accent-orange);
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--accent-orange-hover);
  border-color: var(--accent-orange-hover);
}

.btn-secondary {
  background-color: var(--bg-surface-elevated);
  border-color: var(--border-subtle);
  color: var(--text-primary);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--bg-surface-hover);
  border-color: var(--border-strong);
}

.btn-danger {
  background-color: rgba(239, 68, 68, 0.15);
  border-color: var(--accent-red);
  color: var(--accent-red);
}

.btn-danger:hover:not(:disabled) {
  background-color: var(--accent-red);
  color: #ffffff;
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}

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

.btn-icon {
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: var(--radius-sm);
}

.btn-sm {
  padding: 0.3125rem 0.625rem;
  font-size: 0.8125rem;
}

.file-upload-btn {
  cursor: pointer;
}

/* Main Container */
.main-content {
  flex: 1;
  max-width: 1100px;
  width: 100%;
  margin: 0 auto;
  padding: 1.5rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.app-intro {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Cards */
.card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
}

/* Model Banner */
.model-banner {
  border-color: var(--border-strong);
  background-color: var(--bg-surface-elevated);
}

.banner-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.banner-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.banner-desc {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin-top: 0.25rem;
}

.banner-actions {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  flex-wrap: wrap;
}

/* Progress bar */
.progress-bar-container {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.progress-bar-track {
  height: 8px;
  background-color: var(--bg-canvas);
  border-radius: 9999px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background-color: var(--accent-orange);
  transition: width 100ms ease-out;
}

.progress-info {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

/* Input Card */
.input-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.mode-tabs {
  display: inline-flex;
  padding: 0.25rem;
  background-color: var(--bg-canvas);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  gap: 0.25rem;
}

.mode-tab {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.375rem 0.75rem;
  border-radius: calc(var(--radius-sm) - 2px);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.mode-tab.active {
  background-color: var(--bg-surface-elevated);
  color: var(--text-primary);
}

.sample-presets {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  flex-wrap: wrap;
}

.preset-label {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.preset-btn {
  background-color: var(--bg-canvas);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  cursor: pointer;
  transition: var(--transition-fast);
}

.preset-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-strong);
  background-color: var(--bg-surface-hover);
}

/* URL Input Form */
.url-input-form {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.input-group {
  flex: 1;
  min-width: 260px;
  display: flex;
  align-items: center;
  background-color: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0 0.75rem;
  transition: border-color var(--transition-fast);
}

.input-group:focus-within {
  border-color: var(--border-focus);
}

.input-prefix {
  color: var(--text-muted);
  display: flex;
  align-items: center;
  margin-right: 0.5rem;
}

.input-group input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 0.875rem;
  padding: 0.625rem 0;
  outline: none;
}

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

.input-actions {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.btn-input-icon {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 0.25rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-input-icon:hover {
  color: var(--text-primary);
}

.btn-submit {
  min-width: 110px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.kbd-hint {
  font-size: 0.6875rem;
  font-family: var(--font-mono);
  background-color: rgba(0, 0, 0, 0.25);
  padding: 0.125rem 0.3125rem;
  border-radius: 4px;
  color: rgba(255, 255, 255, 0.85);
}

/* Raw HTML View */
.html-input-area {
  position: relative;
  width: 100%;
}

.html-input-area textarea {
  width: 100%;
  height: 220px;
  background-color: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.875rem;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  resize: vertical;
  outline: none;
  line-height: 1.4;
}

.html-input-area textarea:focus {
  border-color: var(--border-focus);
}

.drop-overlay {
  position: absolute;
  inset: 0;
  background-color: rgba(20, 22, 27, 0.92);
  border: 2px dashed var(--accent-orange);
  border-radius: var(--radius-sm);
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  color: var(--text-primary);
  pointer-events: none;
}

.html-secondary-row {
  margin-top: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.base-url-wrapper {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex: 1;
  min-width: 260px;
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

.base-url-wrapper input {
  flex: 1;
  background-color: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.375rem 0.625rem;
  color: var(--text-primary);
  font-size: 0.8125rem;
  outline: none;
}

.base-url-wrapper input:focus {
  border-color: var(--border-focus);
}

.html-action-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Status Alert */
.status-alert {
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  gap: 0.625rem;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
}

.status-alert.error {
  border-color: var(--accent-red);
  color: #fca5a5;
  background-color: rgba(239, 68, 68, 0.1);
}

.status-alert.info {
  border-color: var(--accent-orange);
  color: #fdba74;
  background-color: rgba(234, 88, 12, 0.1);
}

/* Results Card */
.results-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1.5rem;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 1rem;
  flex-wrap: wrap;
}

.results-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
}

.results-source {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  word-break: break-all;
}

.stats-row {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-label {
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.stat-value {
  font-size: 0.9375rem;
  font-weight: 600;
  font-family: var(--font-mono);
  color: var(--text-primary);
}

.stat-highlight {
  color: var(--accent-green);
}

/* Output Toolbar */
.output-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin: 1rem 0;
  flex-wrap: wrap;
}

.output-tabs {
  display: inline-flex;
  padding: 0.25rem;
  background-color: var(--bg-canvas);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  gap: 0.25rem;
  overflow-x: auto;
}

.output-tab {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 0.8125rem;
  font-weight: 600;
  padding: 0.375rem 0.75rem;
  border-radius: calc(var(--radius-sm) - 2px);
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition-fast);
}

.output-tab.active {
  background-color: var(--bg-surface-elevated);
  color: var(--text-primary);
}

.output-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Output Views */
.output-content {
  background-color: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  min-height: 250px;
  overflow: hidden;
}

/* Reader View (Prose) */
.reader-view {
  padding: 1.5rem;
  max-width: 820px;
  margin: 0 auto;
  color: var(--text-primary);
}

.reader-view h1, .reader-view h2, .reader-view h3, .reader-view h4 {
  color: #ffffff;
  font-weight: 700;
  margin-top: 1.5em;
  margin-bottom: 0.5em;
  line-height: 1.3;
}

.reader-view h1:first-child { margin-top: 0; }
.reader-view p { margin-bottom: 1em; line-height: 1.7; }
.reader-view a { color: var(--accent-orange-hover); text-decoration: underline; }
.reader-view ul, .reader-view ol { margin-left: 1.5em; margin-bottom: 1em; }
.reader-view li { margin-bottom: 0.35em; line-height: 1.6; }
.reader-view blockquote {
  border-left: 3px solid var(--border-strong);
  padding-left: 1rem;
  margin: 1em 0;
  color: var(--text-secondary);
  font-style: italic;
}
.reader-view img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  margin: 1em 0;
  border: 1px solid var(--border-subtle);
}
.reader-view table {
  width: 100%;
  border-collapse: collapse;
  margin: 1em 0;
  font-size: 0.875rem;
}
.reader-view th, .reader-view td {
  border: 1px solid var(--border-subtle);
  padding: 0.5rem 0.75rem;
  text-align: left;
}
.reader-view th { background-color: var(--bg-surface-elevated); }

/* Monospace Code View */
.code-view {
  padding: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--text-primary);
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 600px;
  overflow-y: auto;
}

/* Block Inspector */
.block-inspector-list {
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-height: 600px;
  overflow-y: auto;
}

.inspector-item {
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.75rem;
  background-color: var(--bg-surface);
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.inspector-item.is-main {
  border-left: 3px solid var(--accent-green);
}

.inspector-item.is-other {
  border-left: 3px solid var(--text-muted);
  opacity: 0.75;
}

.inspector-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  font-size: 0.75rem;
  font-family: var(--font-mono);
}

.inspector-badge {
  font-weight: 600;
  padding: 0.125rem 0.375rem;
  border-radius: 4px;
}

.inspector-badge.badge-main {
  background-color: rgba(16, 185, 129, 0.15);
  color: var(--accent-green);
}

.inspector-badge.badge-other {
  background-color: var(--bg-surface-elevated);
  color: var(--text-muted);
}

.inspector-code {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
  background-color: var(--bg-canvas);
  padding: 0.5rem;
  border-radius: 4px;
  white-space: pre-wrap;
  word-break: break-all;
}

/* Modal */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.75);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 1rem;
}

.modal-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  max-width: 520px;
  width: 100%;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-header h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
}

.modal-body {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.cache-info-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.875rem;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 0.5rem;
}

.cache-label {
  color: var(--text-secondary);
}

.cache-val {
  font-family: var(--font-mono);
  color: var(--text-primary);
  font-weight: 500;
}

.modal-help-text {
  font-size: 0.8125rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-top: 0.5rem;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
}

/* Footer */
.app-footer {
  border-top: 1px solid var(--border-subtle);
  padding: 1.5rem 1.25rem;
  margin-top: auto;
  text-align: center;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.app-footer a {
  color: var(--text-secondary);
  text-decoration: underline;
}

.footer-sub {
  font-size: 0.75rem;
  margin-top: 0.25rem;
}

/* Responsive adjustments */
@media (max-width: 640px) {
  .header-content {
    flex-direction: column;
    align-items: flex-start;
  }
  .header-meta {
    width: 100%;
    justify-content: space-between;
  }
  .input-header-row {
    flex-direction: column;
    align-items: flex-start;
  }
  .sample-presets {
    width: 100%;
  }
  .url-input-form {
    flex-direction: column;
  }
  .btn-submit {
    width: 100%;
  }
  .results-header {
    flex-direction: column;
  }
  .stats-row {
    width: 100%;
    justify-content: space-between;
  }
  .output-toolbar {
    flex-direction: column;
    align-items: stretch;
  }
  .output-actions {
    justify-content: flex-end;
  }
}