/* ============================================================
   WalkColor — Mobile-first CSS
   ============================================================ */

@font-face {
  font-family: 'Playfair Display';
  src: url('../assets/fonts/playfair-display.woff2') format('woff2');
  font-display: swap;
}
@font-face {
  font-family: 'Space Mono';
  src: url('../assets/fonts/space-mono.woff2') format('woff2');
  font-display: swap;
}

:root {
  --accent: #4A90D9;
  --accent-light: rgba(74, 144, 217, 0.1);
}

/* ── Reset & Base ── */
*, *::before, *::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: #F5F5F5;
  font-family: -apple-system, system-ui, sans-serif;
  -webkit-tap-highlight-color: transparent;
  overscroll-behavior: none;
}

/* ── App Shell ── */
#app {
  display: flex;
  flex-direction: column;
  height: 100dvh;
  overflow: hidden;
}

/* ── Tab Bar ── */
#tab-bar {
  display: flex;
  height: 48px;
  background: white;
  border-bottom: 1px solid #E0E0E0;
  flex-shrink: 0;
}

.tab {
  flex: 1;
  border: none;
  background: none;
  font-size: 14px;
  color: #666;
  padding: 0;
  cursor: pointer;
  min-height: 44px;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}

.tab.active {
  color: var(--accent);
  font-weight: 600;
  border-bottom: 2px solid var(--accent);
}

/* ── Preview Area ── */
#preview-area {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px;
  overflow: hidden;
  background: #EAEAEA;
  position: relative;
}

#canvas-container {
  aspect-ratio: 3 / 4;
  height: 100%;
  max-width: 100%;
  background: white;
  border-radius: 4px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  position: relative;
}

/* ── Welcome Overlay ── */
#welcome-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 10;
  pointer-events: none;
}

#welcome-overlay.hidden {
  display: none;
}

.welcome-title {
  font-size: 32px;
  font-weight: 700;
  color: #333;
  letter-spacing: 2px;
}

.welcome-sub {
  font-size: 14px;
  color: #999;
  margin-top: 8px;
}

.welcome-watermark {
  font-size: 12px;
  color: #BBB;
  margin-top: 12px;
}

/* ── Upload Area Collapsed ── */
.upload-controls.collapsed .upload-btn {
  height: 40px;
  font-size: 13px;
  border-style: solid;
  border-width: 1px;
}

/* ── Control Panel ── */
#control-panel {
  height: 38vh;
  min-height: 200px;
  overflow-y: auto;
  padding: 8px 24px;
  background: white;
  border-top: 1px solid #E0E0E0;
  flex-shrink: 0;
}

.panel {
  display: none;
}

/* ── Layout Section (inside upload panel) ── */
#layout-section {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid #E0E0E0;
}

/* ── Toast ── */
.toast {
  position: fixed;
  bottom: 80px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.8);
  color: white;
  padding: 12px 24px;
  border-radius: 24px;
  font-size: 14px;
  z-index: 1000;
  transition: opacity 0.3s;
  white-space: nowrap;
}

.toast.hidden {
  opacity: 0;
  pointer-events: none;
}

/* ── Typography Helpers ── */
.section-label {
  font-size: 12px;
  color: #999;
  margin: 6px 0 2px;
}

/* ── Horizontal Scroll Strip ── */
.h-scroll {
  display: flex;
  overflow-x: auto;
  gap: 8px;
  padding: 4px 0;
  -webkit-overflow-scrolling: touch;
}

.h-scroll::-webkit-scrollbar {
  display: none;
}

/* ── Buttons ── */
.action-btn {
  width: 100%;
  height: 36px;
  border: none;
  border-radius: 18px;
  background: var(--accent);
  color: white;
  font-size: 14px;
  cursor: pointer;
  min-height: 36px;
  transition: opacity 0.2s;
}

.action-btn:active {
  opacity: 0.8;
}

.action-btn.large {
  height: 56px;
  font-size: 18px;
}

.small-btn {
  padding: 6px 12px;
  border: 1px solid #E0E0E0;
  border-radius: 16px;
  background: white;
  font-size: 12px;
  color: #666;
  cursor: pointer;
  min-height: 32px;
  transition: border-color 0.2s;
}

.small-btn:active {
  border-color: var(--accent);
  color: var(--accent);
}

/* ── Mode / Type Toggle ── */
.mode-toggle {
  display: flex;
  gap: 8px;
  margin-bottom: 6px;
}

.mode-btn,
.export-type-btn,
.anim-btn,
.style-btn {
  flex: 1;
  height: 34px;
  border: 2px solid #E0E0E0;
  border-radius: 10px;
  background: white;
  font-size: 13px;
  cursor: pointer;
  min-height: 34px;
  transition: border-color 0.2s, background 0.2s, color 0.2s;
}

.mode-btn.active,
.export-type-btn.active,
.anim-btn.active,
.style-btn.active {
  border-color: var(--accent);
  background: var(--accent-light);
  color: var(--accent);
  font-weight: 600;
}

/* ── Zoom Row ── */
.zoom-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin: 4px 0;
}

.zoom-label {
  font-size: 12px;
  color: #666;
  white-space: nowrap;
  flex-shrink: 0;
}

.zoom-row .slider-zoom {
  flex: 1;
  max-width: 60%;
}

/* Enlarged zoom row */
.zoom-row-large {
  margin: 10px 0;
  gap: 10px;
}

.zoom-row-large .zoom-label {
  font-size: 15px;
  font-weight: 500;
  color: #333;
}

.zoom-row-large .slider-zoom {
  max-width: 100%;
  height: 10px;
}

/* ── Button Row ── */
.btn-row {
  display: flex;
  gap: 8px;
  margin-top: 12px;
}

.btn-row .action-btn {
  flex: 1;
}

/* ── Upload Button ── */
.upload-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 80px;
  border: 2px dashed #CCC;
  border-radius: 16px;
  background: white;
  font-size: 16px;
  color: #666;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s;
}

.upload-btn:active {
  border-color: var(--accent);
  color: var(--accent);
}

/* ── Color Swatches ── */
.swatches {
  display: flex;
  gap: 12px;
  margin-top: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.swatch {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  border: 3px solid transparent;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.swatch.selected {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent);
}

/* ── Shape / Dist / Phrase / Corner / Font Buttons ── */
.shape-btn,
.dist-btn,
.phrase-btn,
.corner-btn {
  min-width: 44px;
  min-height: 44px;
  padding: 8px 12px;
  border: 2px solid #E0E0E0;
  border-radius: 12px;
  background: white;
  font-size: 14px;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  transition: border-color 0.2s, background 0.2s, color 0.2s;
}

.shape-btn.active,
.dist-btn.active,
.phrase-btn.active,
.corner-btn.active,
.font-btn.active {
  border-color: var(--accent);
  background: var(--accent-light);
  color: var(--accent);
}

.font-btn {
  min-width: 48px;
  min-height: 44px;
  padding: 8px 12px;
  border: 2px solid #E0E0E0;
  border-radius: 12px;
  background: white;
  font-size: 18px;
  cursor: pointer;
  flex-shrink: 0;
  transition: border-color 0.2s, background 0.2s;
}

/* ── Slider ── */
.slider-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 2px 0;
}

.slider-label {
  font-size: 13px;
  color: #999;
  min-width: 16px;
  text-align: center;
}

.slider {
  width: 100%;
  margin: 4px 0;
  accent-color: var(--accent);
}

.slider-zoom {
  accent-color: #4A90D9;
  height: 6px;
}

/* ── Progress Bar ── */
.progress {
  margin-top: 12px;
  position: relative;
  height: 24px;
  background: #E0E0E0;
  border-radius: 12px;
  overflow: hidden;
}

.progress.hidden {
  display: none;
}

.progress-bar {
  height: 100%;
  background: var(--accent);
  border-radius: 12px;
  transition: width 0.3s;
  width: 0;
}

.progress-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 12px;
  color: white;
  font-weight: 600;
}

/* ── Misc Utility ── */
.hidden {
  display: none !important;
}

.text-muted {
  color: #999;
  font-size: 13px;
}

.mt-8 {
  margin-top: 8px;
}

.mt-12 {
  margin-top: 12px;
}

/* ── Scrollbar (desktop) ── */
#control-panel::-webkit-scrollbar {
  width: 4px;
}

#control-panel::-webkit-scrollbar-thumb {
  background: #E0E0E0;
  border-radius: 2px;
}

/* Stripe options */
#stripe-options {
  margin: 4px 0;
}

.stripe-bg-row,
.stripe-dir-row {
  display: flex;
  gap: 6px;
  margin: 4px 0;
  align-items: center;
}

.stripe-bg-row .section-label,
.stripe-dir-row .section-label {
  margin: 0;
  min-width: 32px;
}

.stripe-bg-btn {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 2px solid #E0E0E0;
  cursor: pointer;
  transition: border-color 0.2s;
}

.stripe-bg-btn.active {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent);
}

.stripe-dir-btn {
  flex: 1;
  height: 30px;
  border: 2px solid #E0E0E0;
  border-radius: 8px;
  background: white;
  font-size: 12px;
  cursor: pointer;
  min-height: 30px;
}

.stripe-dir-btn.active {
  border-color: var(--accent);
  background: var(--accent-light);
  color: var(--accent);
}

/* Color picker input — rainbow wheel */
.color-picker-input {
  width: 80px;
  height: 80px;
  border: 3px solid #E0E0E0;
  border-radius: 50%;
  padding: 0;
  cursor: pointer;
  background: conic-gradient(
    hsl(0, 100%, 50%),
    hsl(60, 100%, 50%),
    hsl(120, 100%, 50%),
    hsl(180, 100%, 50%),
    hsl(240, 100%, 50%),
    hsl(300, 100%, 50%),
    hsl(360, 100%, 50%)
  );
  -webkit-appearance: none;
  appearance: none;
  flex-shrink: 0;
}

.color-picker-input::-webkit-color-swatch-wrapper {
  padding: 0;
}

.color-picker-input::-webkit-color-swatch {
  border: none;
  border-radius: 50%;
  opacity: 0;
}

/* Change photo button at bottom */
.change-photo-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  background: white !important;
  color: #666 !important;
  border: 2px solid #E0E0E0;
  cursor: pointer;
}

/* Stripe density row */
.stripe-density-row {
  display: flex;
  gap: 6px;
  margin: 4px 0;
  align-items: center;
}

.stripe-density-row .section-label {
  margin: 0;
  min-width: 32px;
}

.stripe-density-row .slider {
  flex: 1;
}

.mt-16 {
  margin-top: 16px;
}