:root {
  --bg-base: #090d16;
  --bg-surface: #111827;
  --bg-card: #161f33;
  --bg-card-hover: #1d2942;
  --bg-input: #0b111e;
  --border-subtle: rgba(148, 163, 184, 0.16);
  --border-focus: #14b8a6;
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --accent-teal: #14b8a6;
  --accent-teal-hover: #0d9488;
  --accent-teal-glow: rgba(20, 184, 166, 0.18);
  --accent-indigo: #6366f1;
  --status-success: #10b981;
  --status-warn: #f59e0b;
  --status-danger: #ef4444;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', Consolas, monospace;
}

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

body {
  background-color: var(--bg-base);
  background-image:
    radial-gradient(circle at 12% 10%, rgba(20, 184, 166, 0.10), transparent 35%),
    radial-gradient(circle at 88% 15%, rgba(99, 102, 241, 0.10), transparent 35%);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.5;
  min-height: 100vh;
  padding-bottom: 64px;
}

.hidden {
  display: none !important;
}

/* Header */
.top-header {
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(17, 24, 39, 0.85);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 40;
}

.header-inner {
  max-width: 1440px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.brand-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent-teal), var(--accent-indigo));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 18px;
  color: #fff;
  box-shadow: 0 4px 14px rgba(20, 184, 166, 0.35);
}

.brand-title {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-subtitle {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

/* Main Container */
.main-container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 24px;
}

/* Step Pills Banner */
.workflow-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.workflow-step-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.step-num {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--accent-teal-glow);
  border: 1px solid var(--accent-teal);
  color: #5eead4;
  font-weight: 700;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.workflow-step-card h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 2px;
}

.workflow-step-card p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Dropzone & Queue Bar */
.ingest-section {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 20px;
  margin-bottom: 24px;
}

.drop-zone {
  background: linear-gradient(180deg, rgba(22, 31, 51, 0.75), rgba(17, 24, 39, 0.9));
  border: 2px dashed rgba(20, 184, 166, 0.45);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.drop-zone:hover,
.drop-zone.drag-over {
  border-color: var(--accent-teal);
  background: rgba(20, 184, 166, 0.08);
  transform: translateY(-1px);
}

.drop-icon {
  font-size: 2rem;
  color: #5eead4;
}

.drop-zone h2 {
  font-size: 1.1rem;
  font-weight: 600;
}

.drop-zone p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.drop-actions {
  display: flex;
  gap: 10px;
  margin-top: 6px;
  flex-wrap: wrap;
  justify-content: center;
}

.queue-panel {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 16px;
  display: flex;
  flex-direction: column;
  max-height: 210px;
}

.queue-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.queue-header h3 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.queue-list {
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}

.queue-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
}

.queue-item:hover {
  background: var(--bg-card-hover);
}

.queue-item.active {
  border-color: var(--accent-teal);
  background: rgba(20, 184, 166, 0.12);
}

.queue-thumb {
  width: 42px;
  height: 42px;
  border-radius: 6px;
  object-fit: cover;
  background: #000;
  flex-shrink: 0;
}

.queue-info {
  flex: 1;
  min-width: 0;
}

.queue-filename {
  font-size: 0.85rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.queue-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 2px;
}

.score-pill {
  padding: 1px 6px;
  border-radius: 99px;
  font-weight: 600;
  font-size: 0.7rem;
}

.score-pill-good {
  background: rgba(16, 185, 129, 0.18);
  color: #34d399;
}

.score-pill-warn {
  background: rgba(245, 158, 11, 0.18);
  color: #fbbf24;
}

.score-pill-bad {
  background: rgba(239, 68, 68, 0.18);
  color: #f87171;
}

.btn-icon-remove {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.2rem;
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 4px;
}

.btn-icon-remove:hover {
  color: var(--status-danger);
  background: rgba(239, 68, 68, 0.12);
}

/* Empty State */
.empty-workspace {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 40px 24px;
  text-align: center;
  margin-bottom: 28px;
}

.empty-workspace h3 {
  font-size: 1.2rem;
  margin-bottom: 8px;
}

.empty-workspace p {
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 auto 18px;
  font-size: 0.92rem;
}

/* 3-Column Studio Grid */
.workspace-grid {
  display: grid;
  grid-template-columns: 370px 1fr 400px;
  gap: 20px;
  align-items: start;
  margin-bottom: 32px;
}

.studio-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-card);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding-bottom: 14px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--border-subtle);
}

.card-header h2 {
  font-size: 1rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Score Ring */
.score-hero {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  border: 1px solid var(--border-subtle);
}

.score-ring-wrap {
  position: relative;
  width: 96px;
  height: 96px;
  flex-shrink: 0;
}

.score-ring-svg {
  transform: rotate(-90deg);
  width: 96px;
  height: 96px;
}

.score-ring-bg {
  fill: none;
  stroke: rgba(148, 163, 184, 0.15);
  stroke-width: 8;
}

.score-ring-fg {
  fill: none;
  stroke: var(--status-success);
  stroke-width: 8;
  stroke-linecap: round;
  transition: stroke-dashoffset 0.35s ease, stroke 0.35s ease;
}

.score-ring-Center {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.score-num {
  font-size: 1.5rem;
  font-weight: 800;
  line-height: 1;
}

.score-max {
  font-size: 0.7rem;
  color: var(--text-muted);
}

.score-summary h4 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.score-summary p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Checklist */
.checklist-stack {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 18px;
}

.check-row {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 9px 11px;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border-left: 3px solid transparent;
  font-size: 0.8rem;
}

.check-pass {
  border-left-color: var(--status-success);
}

.check-warn {
  border-left-color: var(--status-warn);
}

.check-fail {
  border-left-color: var(--status-danger);
}

.check-icon {
  font-weight: 800;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  flex-shrink: 0;
  margin-top: 2px;
}

.check-pass .check-icon {
  background: rgba(16, 185, 129, 0.2);
  color: #34d399;
}

.check-warn .check-icon {
  background: rgba(245, 158, 11, 0.2);
  color: #fbbf24;
}

.check-fail .check-icon {
  background: rgba(239, 68, 68, 0.2);
  color: #f87171;
}

.check-body strong {
  display: block;
  color: var(--text-primary);
  margin-bottom: 1px;
}

.check-body p {
  color: var(--text-muted);
  font-size: 0.75rem;
}

/* Raw Binary Tag Table */
.raw-inspector-box {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px;
}

.raw-inspector-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.raw-inspector-header h4 {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.raw-table-scroll {
  max-height: 220px;
  overflow-y: auto;
}

.raw-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.75rem;
}

.raw-table tr {
  border-bottom: 1px solid rgba(148, 163, 184, 0.1);
}

.raw-table td {
  padding: 6px 4px;
  vertical-align: top;
}

.raw-key {
  font-family: var(--font-mono);
  color: #5eead4;
  white-space: nowrap;
  padding-right: 10px !important;
}

.raw-val {
  color: var(--text-secondary);
  word-break: break-word;
}

.empty-table-cell {
  color: var(--text-muted);
  text-align: center;
  padding: 14px !important;
}

/* Step 2: Editor Tabs & Form */
.editor-toolbar {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.editor-tabs {
  display: flex;
  gap: 6px;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 16px;
  overflow-x: auto;
}

.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 9px 14px;
  font-size: 0.84rem;
  font-weight: 600;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  transition: all 0.15s ease;
}

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

.tab-btn.active {
  color: #5eead4;
  border-bottom-color: var(--accent-teal);
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.form-group {
  margin-bottom: 14px;
}

.form-group.full-width {
  grid-column: 1 / -1;
}

.form-label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 5px;
}

label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 5px;
}

.label-tag-hint {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  font-weight: 400;
}

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

.char-counter.good {
  color: #34d399;
}

input[type="text"],
input[type="url"],
input[type="date"],
input[type="number"],
select,
textarea {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 9px 12px;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.86rem;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--accent-teal-glow);
}

textarea {
  resize: vertical;
  min-height: 70px;
}

/* Keywords Pills */
.keywords-pills-box {
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 8px;
  min-height: 44px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 8px;
}

.empty-pills-hint {
  font-size: 0.78rem;
  color: var(--text-muted);
  padding: 4px;
}

.tag-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(20, 184, 166, 0.16);
  border: 1px solid rgba(20, 184, 166, 0.4);
  color: #5eead4;
  padding: 3px 9px;
  border-radius: 99px;
  font-size: 0.78rem;
  font-weight: 500;
}

.tag-pill button {
  background: none;
  border: none;
  color: #5eead4;
  cursor: pointer;
  font-size: 0.95rem;
  line-height: 1;
}

.keyword-add-row {
  display: flex;
  gap: 8px;
}

/* Step 3: Preview & Export Studio */
.preview-frame {
  background: #05080f;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 14px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
  max-height: 260px;
}

.preview-frame img {
  max-width: 100%;
  max-height: 250px;
  object-fit: contain;
  display: block;
}

.conversion-comparison {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 8px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px;
  margin-bottom: 12px;
}

.comp-col {
  text-align: center;
}

.comp-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  display: block;
}

.comp-size {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text-primary);
}

.comp-arrow {
  color: var(--accent-teal);
  font-weight: 800;
  font-size: 1.1rem;
}

/* Format Option Cards */
.format-options-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 14px;
}

.format-option-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 10px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 2px;
  transition: all 0.15s ease;
}

.format-option-card input[type="radio"] {
  display: none;
}

.format-option-card.selected {
  border-color: var(--accent-teal);
  background: rgba(20, 184, 166, 0.14);
}

.format-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 700;
  font-size: 0.86rem;
}

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

/* Quality Slider & Presets */
.slider-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--accent-teal);
  cursor: pointer;
}

.preset-chips {
  display: flex;
  gap: 6px;
  margin-top: 6px;
  flex-wrap: wrap;
}

.chip-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 3px 8px;
  border-radius: 6px;
  font-size: 0.72rem;
  cursor: pointer;
}

.chip-btn:hover {
  border-color: var(--accent-teal);
  color: #5eead4;
}

/* Round-Trip Verification Banner */
.verify-box {
  margin: 12px 0;
}

.verify-success {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.35);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  font-size: 0.76rem;
}

.verify-check {
  background: var(--status-success);
  color: #052e16;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  flex-shrink: 0;
}

.verify-success strong {
  color: #34d399;
  display: block;
  margin-bottom: 2px;
}

.verify-success p {
  color: var(--text-secondary);
}

/* Buttons & Badges */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 15px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s ease;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-teal), var(--accent-teal-hover));
  color: #042f2e;
  font-weight: 700;
  box-shadow: 0 4px 14px rgba(20, 184, 166, 0.3);
}

.btn-primary:hover {
  filter: brightness(1.08);
  transform: translateY(-1px);
}

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

.btn-secondary:hover {
  border-color: var(--accent-teal);
  background: var(--bg-card-hover);
}

.btn-sm {
  padding: 6px 11px;
  font-size: 0.78rem;
}

.btn-block {
  width: 100%;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 8px;
  border-radius: 99px;
  font-size: 0.72rem;
  font-weight: 600;
}

.badge-success {
  background: rgba(16, 185, 129, 0.18);
  color: #34d399;
}

.badge-info {
  background: rgba(20, 184, 166, 0.18);
  color: #5eead4;
}

.badge-warn {
  background: rgba(245, 158, 11, 0.18);
  color: #fbbf24;
}

.badge-neutral {
  background: rgba(148, 163, 184, 0.15);
  color: var(--text-muted);
}

/* Code Snippets & Format Guide Section */
.bottom-panels-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 24px;
}

.code-textarea {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  min-height: 150px;
  background: #070b12;
  color: #a7f3d0;
}

.format-guide-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
  margin-top: 10px;
}

.format-guide-table th,
.format-guide-table td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border-subtle);
}

.format-guide-table th {
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 100;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  background: #1e293b;
  border-left: 4px solid var(--accent-teal);
  color: #f8fafc;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
  font-size: 0.85rem;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.toast-success {
  border-left-color: var(--status-success);
}

.toast-warn {
  border-left-color: var(--status-warn);
}

.toast-hide {
  opacity: 0;
  transform: translateY(8px);
}

@media (max-width: 1180px) {
  .workspace-grid {
    grid-template-columns: 1fr;
  }
  .ingest-section,
  .bottom-panels-grid,
  .workflow-steps {
    grid-template-columns: 1fr;
  }
}