/* Dark & Light theme tokens adhering to theme-mode-standard */
:root,
.light,
[data-theme="light"] {
  --bg: #f4f5f8;
  --surface: #ffffff;
  --surface-muted: #f0f2f6;
  --surface-elevated: #ffffff;
  --border: #dde2eb;
  --border-strong: #c2cad8;
  --text: #0f172a;
  --text-muted: #526077;
  --primary: #1d4ed8;
  --primary-hover: #1e40af;
  --primary-soft: rgba(29, 78, 216, 0.1);
  --success: #15803d;
  --success-soft: rgba(21, 128, 61, 0.12);
  --warn: #b45309;
  --warn-soft: rgba(180, 83, 9, 0.12);
  --danger: #b91c1c;
  --danger-soft: rgba(185, 28, 28, 0.12);
  --canvas-bg: #e7ebf2;
  --shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
  color-scheme: only light;
}

.dark,
:root.dark,
[data-theme="dark"] {
  --bg: #0b0e14;
  --surface: #131822;
  --surface-muted: #1b2230;
  --surface-elevated: #181f2c;
  --border: rgba(255, 255, 255, 0.1);
  --border-strong: rgba(255, 255, 255, 0.22);
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --primary: #3b82f6;
  --primary-hover: #60a5fa;
  --primary-soft: rgba(59, 130, 246, 0.16);
  --success: #22c55e;
  --success-soft: rgba(34, 197, 94, 0.16);
  --warn: #f59e0b;
  --warn-soft: rgba(245, 158, 11, 0.16);
  --danger: #ef4444;
  --danger-soft: rgba(239, 68, 68, 0.16);
  --canvas-bg: #0f141d;
  --shadow: 0 14px 36px rgba(0, 0, 0, 0.4);
  color-scheme: dark;
}

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

html,
body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Pretendard", "Apple SD Gothic Neo",
    "Noto Sans KR", "Segoe UI", sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.app-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(10px);
}

.topbar-inner {
  max-width: 1240px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

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

.brand-badge {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: var(--primary);
  color: #ffffff;
  font-weight: 800;
  font-size: 0.9rem;
  display: grid;
  place-items: center;
  letter-spacing: -0.02em;
}

.brand-title {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-sub {
  margin: 0;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.topbar-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
}

.theme-select {
  display: inline-flex;
  background: var(--surface-muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 3px;
  gap: 2px;
}

.theme-btn {
  border: 0;
  background: transparent;
  color: var(--text-muted);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 5px 10px;
  border-radius: 999px;
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.theme-btn.active {
  background: var(--surface);
  color: var(--text);
  box-shadow: 0 1px 4px rgba(15, 23, 42, 0.12);
}

/* Stepper */
.stepper-wrap {
  max-width: 1240px;
  width: 100%;
  margin: 18px auto 0;
  padding: 0 20px;
}

.stepper {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 10px;
}

.step-item {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 8px 10px;
  border-radius: 10px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-muted);
  font-size: 0.84rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  transition: all 0.15s ease;
}

.step-item:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.step-item.active {
  background: var(--primary-soft);
  border-color: var(--primary);
  color: var(--primary);
}

.step-item.done {
  color: var(--success);
}

.step-num {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  border-radius: 999px;
  display: grid;
  place-items: center;
  font-size: 0.78rem;
  font-weight: 700;
  background: var(--surface-muted);
  color: inherit;
}

.step-item.active .step-num {
  background: var(--primary);
  color: #ffffff;
}

.step-item.done .step-num {
  background: var(--success-soft);
  color: var(--success);
}

/* Main Content */
.main-container {
  max-width: 1240px;
  width: 100%;
  margin: 18px auto 36px;
  padding: 0 20px;
  flex: 1;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 22px;
  box-shadow: var(--shadow);
}

.hidden {
  display: none !important;
}

.section-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.section-title {
  margin: 0;
  font-size: 1.2rem;
  font-weight: 700;
}

.section-desc {
  margin: 4px 0 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Step 1 Grid */
.step1-grid {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  gap: 22px;
}

.spec-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 10px;
}

.spec-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 13px 14px;
  border-radius: 12px;
  border: 1.5px solid var(--border);
  background: var(--surface-muted);
  color: var(--text);
  text-align: left;
  cursor: pointer;
  transition: all 0.15s ease;
}

.spec-card:hover {
  border-color: var(--border-strong);
}

.spec-card.selected {
  background: var(--primary-soft);
  border-color: var(--primary);
}

.spec-card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 6px;
}

.spec-name {
  font-weight: 700;
  font-size: 0.95rem;
}

.spec-tag {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-muted);
}

.spec-card.selected .spec-tag {
  background: var(--primary);
  border-color: var(--primary);
  color: #ffffff;
}

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

/* Upload Dropzone */
.dropzone {
  border: 2px dashed var(--border-strong);
  border-radius: 14px;
  background: var(--surface-muted);
  min-height: 260px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 12px;
  cursor: pointer;
  transition: border-color 0.15s ease, background-color 0.15s ease;
}

.dropzone.dragover {
  border-color: var(--primary);
  background: var(--primary-soft);
}

.upload-preview {
  max-height: 210px;
  max-width: 100%;
  border-radius: 10px;
  object-fit: contain;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
}

/* Buttons */
.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 10px 16px;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.15s ease;
}

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

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

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

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

.btn-sm {
  padding: 7px 12px;
  font-size: 0.82rem;
}

/* Step 2 Processing */
.processing-box {
  padding: 56px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 14px;
}

.spinner {
  width: 44px;
  height: 44px;
  border-radius: 999px;
  border: 4px solid var(--border);
  border-top-color: var(--primary);
  animation: spin 0.85s linear infinite;
}

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

/* Workspace Split (Step 3 & Step 4) */
.workspace-split {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(320px, 0.95fr);
  gap: 22px;
  align-items: start;
}

.canvas-stage {
  background: var(--canvas-bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.crop-canvas {
  max-width: 100%;
  max-height: 580px;
  border-radius: 8px;
  cursor: crosshair;
  touch-action: none;
  user-select: none;
  box-shadow: 0 6px 22px rgba(0, 0, 0, 0.18);
}

.control-card {
  background: var(--surface-muted);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.control-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.84rem;
  font-weight: 600;
}

.control-label span.val {
  color: var(--primary);
  font-variant-numeric: tabular-nums;
}

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

/* Metric Gauge & Badges */
.metric-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

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

.pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 9px;
  border-radius: 999px;
  font-size: 0.76rem;
  font-weight: 700;
}

.pill-pass {
  background: var(--success-soft);
  color: var(--success);
}

.pill-warn {
  background: var(--warn-soft);
  color: var(--warn);
}

.gauge-track {
  position: relative;
  height: 10px;
  border-radius: 999px;
  background: var(--surface-muted);
  border: 1px solid var(--border);
  overflow: hidden;
}

.gauge-safe-zone {
  position: absolute;
  top: 0;
  bottom: 0;
  background: var(--success-soft);
  border-left: 1px solid var(--success);
  border-right: 1px solid var(--success);
}

.gauge-marker {
  position: absolute;
  top: -1px;
  bottom: -1px;
  width: 4px;
  border-radius: 2px;
  background: var(--primary);
  transform: translateX(-50%);
}

/* Step 4 Preview & Presets */
.preview-frame-wrap {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 16px;
  background: repeating-conic-gradient(var(--surface-muted) 0% 25%, var(--surface) 0% 50%)
    50% / 20px 20px;
  border-radius: 12px;
  border: 1px solid var(--border);
  width: 100%;
}

.preview-img {
  max-width: 100%;
  max-height: 480px;
  border-radius: 6px;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.18);
  transition: filter 0.08s linear;
}

.preset-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

.preset-btn {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  border-radius: 10px;
  padding: 8px 10px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
}

.preset-btn.active {
  border-color: var(--primary);
  background: var(--primary-soft);
  color: var(--primary);
}

.bg-swatch-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.bg-swatch {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
}

.bg-swatch.active {
  border-color: var(--primary);
  background: var(--primary-soft);
}

.swatch-dot {
  width: 14px;
  height: 14px;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
}

/* Step 5 Result Cards */
.result-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.result-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.95fr;
  gap: 22px;
}

.result-preview-box {
  background: var(--canvas-bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 440px;
}

.result-preview-box img {
  max-width: 100%;
  max-height: 480px;
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.alert-box {
  padding: 11px 14px;
  border-radius: 10px;
  font-size: 0.84rem;
  border: 1px solid transparent;
}

.alert-info {
  background: var(--primary-soft);
  border-color: var(--primary);
  color: var(--text);
}

.alert-warn {
  background: var(--warn-soft);
  border-color: var(--warn);
  color: var(--text);
}

.alert-error {
  background: var(--danger-soft);
  border-color: var(--danger);
  color: var(--danger);
  margin-bottom: 14px;
}

.mini-thumb {
  width: 120px;
  height: auto;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #ffffff;
}

.audit-details {
  margin-top: 18px;
  padding: 14px 16px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface-muted);
  font-size: 0.84rem;
}

.audit-details summary {
  font-weight: 700;
  cursor: pointer;
}

.audit-list {
  margin: 10px 0 0;
  padding-left: 18px;
  color: var(--text-muted);
}

.audit-list li + li {
  margin-top: 6px;
}

/* PC Model Hub & Zero-Cost Client Execution Card */
.pc-engine-card {
  margin-bottom: 20px;
  padding: 16px 18px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--surface-muted);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.pc-engine-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.pc-engine-title {
  margin: 0 0 4px;
  font-size: 0.96rem;
  font-weight: 700;
}

.exec-mode-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.exec-mode-btn {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-muted);
  border-radius: 10px;
  padding: 7px 12px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}

.exec-mode-btn:hover {
  border-color: var(--border-strong);
  color: var(--text);
}

.exec-mode-btn.active {
  border-color: var(--primary);
  background: var(--primary-soft);
  color: var(--primary);
}

.model-hub-body {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.model-hub-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.model-select {
  flex: 1 1 320px;
  min-width: 220px;
  padding: 8px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 0.85rem;
  font-weight: 600;
}

.progress-wrap {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.progress-track {
  width: 100%;
  height: 8px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--primary);
  border-radius: 999px;
  transition: width 0.15s ease;
}

@media (max-width: 920px) {
  .step1-grid,
  .workspace-split,
  .result-grid {
    grid-template-columns: 1fr;
  }

  .stepper {
    grid-template-columns: repeat(2, 1fr);
  }
}