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

[hidden] { display: none !important; }

:root {
  --bg:          #f0f2f5;
  --surface:     #ffffff;
  --border:      #e0e4ea;
  --accent:      #4f6ef7;
  --accent-dark: #3a55d4;
  --text:        #1a1d23;
  --text-muted:  #6b7280;
  --radius:      10px;
  --shadow:      0 2px 8px rgba(0,0,0,.08);
  --font:        -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
}

html, body {
  height: 100%;
  font-family: var(--font);
  font-size: 14px;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

/* ── App shell ─────────────────────────────────────────────────────────────── */
.app {
  max-width: 1080px;
  margin: 0 auto;
  padding: 24px 20px 48px;
}

/* ── Header ────────────────────────────────────────────────────────────────── */
.header {
  margin-bottom: 28px;
}

.header h1 {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: var(--text);
}

.header h1 span {
  color: var(--accent);
}

.header p {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 3px;
}

/* ── Card ──────────────────────────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  padding: 20px 24px;
  margin-bottom: 20px;
}

.card h2 {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--text-muted);
  margin-bottom: 14px;
}

/* ── Guided workflow ───────────────────────────────────────────────────────── */
.workflow-card {
  padding: 14px 18px;
}

.workflow-steps {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 8px;
}

.workflow-step {
  border: 1px solid var(--border);
  background: #f8f9fb;
  color: var(--text-muted);
  border-radius: 999px;
  padding: 6px 10px;
  text-align: center;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.workflow-step-toggle {
  all: unset;
  display: block;
  width: 100%;
  cursor: pointer;
}

.workflow-step-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 999px;
}

.workflow-step.is-active {
  border-color: var(--accent);
  color: var(--accent);
  background: #eef1fe;
}

.workflow-step.is-complete {
  border-color: #34a853;
  color: #1f7a3a;
  background: #eaf7ee;
}

.workflow-step.is-locked {
  opacity: 0.7;
}

.workflow-status {
  margin-bottom: 12px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  padding: 0;
  font-size: 12px;
}

.workflow-status.is-warn {
  border-color: #e5c45d;
  background: #fff8df;
  color: #7a5a00;
}

.workflow-status.is-error {
  border-color: #e7b0b7;
  background: #fff0f2;
  color: #9e2f3e;
}

.workflow-panel-body {
  margin-bottom: 14px;
}

.workflow-panel-body:last-child {
  margin-bottom: 0;
}

.workflow-panel-body.is-collapsed {
  display: none;
}

.workflow-hint {
  font-size: 12px;
  color: var(--text-muted);
}

/* ── Drop zone ─────────────────────────────────────────────────────────────── */
.drop-zone {
  border: 2px dashed var(--border);
  border-radius: 8px;
  padding: 30px 20px;
  text-align: center;
  cursor: pointer;
  transition: border-color .15s, background .15s;
  background: #f8f9fb;
  user-select: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.drop-zone:hover,
.drop-zone.drag-over {
  border-color: var(--accent);
  background: #eef1fe;
}

.drop-zone .icon {
  font-size: 36px;
  margin-bottom: 10px;
  display: block;
}

.drop-zone p {
  font-size: 13px;
  color: var(--text-muted);
}

.drop-zone p strong {
  color: var(--accent);
}

.drop-zone.has-file {
  padding: 16px 16px;
  text-align: left;
  flex-direction: row;
  align-items: center;
  justify-content: flex-start;
}

.drop-zone.has-file .icon {
  margin-bottom: 0;
  margin-right: 8px;
}

.drop-zone.has-file p {
  margin: 0;
}

/* ── Controls ──────────────────────────────────────────────────────────────── */
.controls {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 16px;
}

.control-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: opacity .15s;
}

.control-row:has(input:disabled),
.control-row:has(select:disabled) {
  opacity: 0.45;
  pointer-events: none;
}

.control-row label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .05em;
}

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

.slider-wrap input[type=range] {
  flex: 1;
  accent-color: var(--accent);
  height: 4px;
  cursor: pointer;
}

.slider-wrap input[type=range]:disabled {
  cursor: not-allowed;
  accent-color: var(--text-muted);
}

select {
  padding: 6px 8px;
  border-radius: 6px;
  border: 1px solid var(--border);
  font-size: 13px;
  font-family: var(--font);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
}

select:disabled {
  cursor: not-allowed;
  background: #f0f2f5;
  color: var(--text-muted);
}

.slider-val {
  min-width: 32px;
  text-align: right;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

/* ── Buttons ───────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: 7px;
  border: none;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: background .12s, opacity .12s, transform .08s;
}

.btn:active:not(:disabled) { transform: scale(0.97); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }

.btn-primary {
  background: var(--accent);
  color: #fff;
}

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

.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 1.5px solid var(--accent);
}

.btn-outline:hover:not(:disabled) { background: #eef1fe; }

.btn-accent {
  background: var(--accent);
  color: #fff;
}

.btn-accent:hover:not(:disabled) { background: var(--accent-dark); }

.convert-wrap {
  margin-top: 18px;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
}

.conversion-counter {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

.conversion-counter.nearing-limit {
  color: #f97316;
  font-weight: 600;
}

.conversion-counter.at-limit {
  color: #ef4444;
  font-weight: 600;
}

/* ── Progress ──────────────────────────────────────────────────────────────── */
.progress-wrap {
  margin-top: 12px;
}

.progress-track {
  height: 5px;
  background: var(--border);
  border-radius: 9px;
  overflow: hidden;
}

.progress-bar {
  appearance: none;
  -webkit-appearance: none;
  width: 100%;
  height: 5px;
  background: var(--accent);
  border-radius: 9px;
  overflow: hidden;
}

.progress-bar::-webkit-progress-bar {
  background: var(--border);
  border-radius: 9px;
}

.progress-bar::-webkit-progress-value {
  background: var(--accent);
  border-radius: 9px;
  transition: width .2s ease;
}

.progress-bar::-moz-progress-bar {
  background: var(--accent);
  border-radius: 9px;
  transition: width .2s ease;
}

.progress-label {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 5px;
}

/* ── Preview section ───────────────────────────────────────────────────────── */
.preview-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 16px;
  margin-bottom: 20px;
}

.preview-grid--two {
  grid-template-columns: 1fr 1fr;
}

.preview-pane {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.preview-pane img,
.preview-pane .svg-inner {
  width: 100%;
}

#stitch-canvas {
  width:100%;
  height:100%;
}

.preview-pane canvas:not(#stitch-canvas) {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.preview-pane .svg-inner svg {
  width: 100%;
  height: 100%;
}

.preview-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .06em;
  margin-bottom: 8px;
}

.preview-col {
  display: flex;
  flex-direction: column;
}

/* ── Stats bar ─────────────────────────────────────────────────────────────── */
.stats {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.stats strong {
  color: var(--text);
}

/* ── Palette ───────────────────────────────────────────────────────────────── */
.palette {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.swatch-item {
  display: flex;
  align-items: center;
  gap: 5px;
}

.swatch {
  display: inline-block;
  width: 20px;
  height: 20px;
  border-radius: 4px;
  border: 1px solid rgba(0,0,0,.1);
  flex-shrink: 0;
}

.swatch svg {
  display: block;
  border-radius: 4px;
}

.swatch-label {
  font-size: 11px;
  font-family: monospace;
  color: var(--text-muted);
}

/* ── Download row ──────────────────────────────────────────────────────────── */
.download-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.download-login-prompt {
  background: linear-gradient(135deg, #f0f7ff 0%, #e8f1ff 100%);
  border: 2px solid var(--accent);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
  text-align: center;
}

.download-login-prompt p {
  margin: 0 0 12px 0;
  color: var(--text);
}

.download-login-prompt p:first-child {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 8px;
}

.download-login-prompt p:last-of-type {
  margin-bottom: 16px;
  color: var(--text-muted);
  font-size: 13px;
}

.download-login-prompt .btn {
  padding: 10px 24px;
  font-size: 14px;
}

/* ── Editor ────────────────────────────────────────────────────────────────── */
.editor-toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

.editor-toolbar-spacer {
  flex: 1;
}

.btn-sm {
  padding: 5px 12px;
  font-size: 12px;
}

.editor-nudge-group {
  display: inline-flex;
  gap: 3px;
  align-items: center;
}

.btn-xs {
  padding: 3px 8px;
  font-size: 11px;
  line-height: 1;
  min-width: 28px;
}

.editor-color-group {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--text-muted);
}

.editor-color-label {
  text-transform: uppercase;
  letter-spacing: .06em;
}

.editor-color-input {
  width: 28px;
  height: 28px;
  padding: 0;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: transparent;
  cursor: pointer;
}

.editor-color-input:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

.editor-layout {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 16px;
  min-height: 500px;
}

.editor-sidebar {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #f8f9fb;
  padding: 8px;
  overflow-y: auto;
  max-height: 500px;
}

.editor-layer {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  border-radius: 6px;
  cursor: pointer;
  transition: background .1s;
  margin-bottom: 2px;
}

.editor-layer:hover {
  background: #eef1fe;
}

.editor-layer--hidden {
  opacity: 0.4;
}

.editor-layer--dragover {
  border-top: 2px solid var(--accent);
}

.editor-layer-swatch {
  width: 18px;
  height: 18px;
  border-radius: 4px;
  border: 1px solid rgba(0,0,0,.1);
  flex-shrink: 0;
}

.editor-layer-swatch svg {
  display: block;
  border-radius: 4px;
}

.editor-layer-info {
  display: flex;
  flex-direction: column;
  gap: 1px;
  min-width: 0;
  flex: 1;
}

.editor-layer-hex {
  font-size: 12px;
  font-weight: 600;
  font-family: monospace;
  color: var(--text);
}

.editor-layer-count {
  font-size: 10px;
  color: var(--text-muted);
}

.editor-layer-vis {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 14px;
  padding: 2px;
  opacity: 0.6;
}

.editor-layer-vis:hover {
  opacity: 1;
}

.editor-canvas-wrap {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #ffffff;
  overflow: hidden;
  position: relative;
}

.editor-canvas-wrap svg {
  display: block;
  width: 100%;
  height: 100%;
}

.editor-svg {
  user-select: none;
}

.preview-mode-select {
  margin-left: 8px;
  font-size: 11px;
  padding: 2px 6px;
}

/* ── Authentication ────────────────────────────────────────────────────────── */
.header-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 20px;
  margin-bottom: 12px;
}

.auth-section {
  display: flex;
  align-items: center;
  gap: 12px;
}

.auth-mode-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid #d7b64a;
  background: #fff7dc;
  color: #7a5a00;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.btn {
  padding: 8px 16px;
  border: none;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: white;
}

.btn-primary:hover {
  background: var(--accent-dark);
}

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

.btn-secondary:hover {
  background: #d0d4db;
}

.btn-google {
  background: #ffffff;
  border: 1px solid var(--border);
  color: var(--text);
  width: 100%;
  padding: 12px;
  margin-bottom: 10px;
}

.btn-google:hover {
  background: #f8f9fa;
}

/* Loading state for Google button when an auth request is in-flight */
.btn-google[aria-busy="true"] {
  cursor: progress;
  opacity: 0.8;
}

.btn-facebook {
  background: #1877f2;
  color: white;
  width: 100%;
  padding: 12px;
  margin-bottom: 10px;
}

.btn-facebook:hover {
  background: #0a66c2;
}

.btn-linkedin {
  background: #0a66c2;
  color: white;
  width: 100%;
  padding: 12px;
}

.btn-linkedin:hover {
  background: #084399;
}

.provider-icon {
  font-weight: 700;
  margin-right: 8px;
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 12px;
  background: var(--surface);
  border-radius: 6px;
  border: 1px solid var(--border);
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
}

.user-name {
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
  min-width: 80px;
}

/* ── Modal ──────────────────────────────────────────────────────────────────── */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 1000;
}

.modal.modal--open {
  display: flex;
}

.modal-content {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  padding: 32px;
  width: 90%;
  max-width: 400px;
  position: relative;
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  font-size: 24px;
  cursor: pointer;
  color: var(--text-muted);
}

.modal-close:hover {
  color: var(--text);
}

.modal-content h2 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}

.modal-content p {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.login-buttons {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.login-status {
  margin-top: 8px;
  font-size: 12px;
  color: var(--text-muted);
  min-height: 16px;
}

.login-status.is-error {
  color: #9e2f3e;
}

/* ── Conversions (History) ─────────────────────────────────────────────────── */
.conversions-card {
  margin-top: 0;
}

.conversions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.conversion-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #f8f9fb;
  transition: all 0.2s ease;
}

.conversion-card:hover {
  border-color: var(--accent);
  background: #ffffff;
  box-shadow: var(--shadow);
}

.conversion-thumbnail {
  width: 100%;
  height: 140px;
  background: #e0e4ea;
  border-radius: 6px;
  object-fit: cover;
  display: block;
}

.conversion-thumbnail.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 12px;
}

.conversion-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.conversion-filename {
  font-size: 12px;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.conversion-meta {
  display: flex;
  flex-direction: column;
  gap: 2px;
  font-size: 11px;
  color: var(--text-muted);
}

.conversion-meta-item {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.conversion-status {
  display: inline-block;
  padding: 2px 6px;
  border-radius: 3px;
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.conversion-status.uploaded {
  background: #e3f2fd;
  color: #1976d2;
}

.conversion-status.converted {
  background: #e8f5e9;
  color: #388e3c;
}

.conversion-status.failed {
  background: #ffebee;
  color: #c62828;
}

.conversion-buttons {
  display: flex;
  gap: 6px;
  margin-top: 8px;
}

.conversion-buttons .btn {
  flex: 1;
  padding: 6px 10px;
  font-size: 11px;
}

.conversions-empty {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-muted);
  font-size: 13px;
}

.conversions-loading {
  text-align: center;
  padding: 20px;
  color: var(--text-muted);
  font-size: 13px;
}

/* ── Responsive ────────────────────────────────────────────────────────────── */
@media (max-width: 720px) {
  .preview-grid { grid-template-columns: 1fr; }
  .controls { grid-template-columns: 1fr; }
  .workflow-steps { grid-template-columns: 1fr 1fr; }
  .conversions-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }

  .header-top {
    flex-direction: column;
    align-items: stretch;
  }

  .auth-section {
    width: 100%;
  }

  .btn {
    width: 100%;
  }
}