/* =============================================
   Signature Generator - style.css
   ============================================= */

@import url('https://fonts.googleapis.com/css2?family=Great+Vibes&family=Pacifico&family=Dancing+Script:wght@700&family=Allura&family=Satisfy&family=Sacramento&family=Alex+Brush&family=Pinyon+Script&family=Yellowtail&family=Kaushan+Script&family=Marck+Script&family=Clicker+Script&family=DM+Sans:wght@400;500;600&display=swap');

/* --- Root & Reset --- */
.sg-wrapper {
  --sg-primary: #2563eb;
  --sg-primary-dark: #1d4ed8;
  --sg-secondary: #1e293b;
  --sg-bg: #f8fafc;
  --sg-card: #ffffff;
  --sg-border: #e2e8f0;
  --sg-text: #1e293b;
  --sg-muted: #64748b;
  --sg-radius: 14px;
  --sg-shadow: 0 4px 6px -1px rgba(0,0,0,.07), 0 20px 60px -10px rgba(37,99,235,.12);
  --sg-canvas-bg: #fafbff;
  font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--sg-text);
  background: var(--sg-bg);
  padding: 32px 16px;
  min-height: 100%;
  box-sizing: border-box;
}

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

/* --- Card --- */
.sg-card {
  background: var(--sg-card);
  border-radius: 20px;
  box-shadow: var(--sg-shadow);
  max-width: 780px;
  margin: 0 auto;
  overflow: hidden;
  border: 1px solid var(--sg-border);
}

/* --- Header --- */
.sg-header {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 28px 32px 24px;
  border-bottom: 1px solid var(--sg-border);
  background: linear-gradient(135deg, #f0f5ff 0%, #fff 60%);
}

.sg-header-icon {
  width: 52px;
  height: 52px;
  background: linear-gradient(135deg, var(--sg-primary), #1d4ed8);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  flex-shrink: 0;
  box-shadow: 0 4px 14px rgba(37,99,235,.35);
}

.sg-title {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--sg-secondary);
}

.sg-subtitle {
  font-size: 0.85rem;
  color: var(--sg-muted);
  margin-top: 2px;
  font-weight: 400;
}

/* --- Tabs --- */
.sg-tabs {
  display: flex;
  gap: 4px;
  padding: 16px 32px 0;
  border-bottom: 1px solid var(--sg-border);
}

.sg-tab {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 10px 20px;
  border: none;
  background: transparent;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--sg-muted);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  border-radius: 8px 8px 0 0;
  transition: all 0.2s ease;
  outline: none;
}

.sg-tab:hover {
  color: var(--sg-primary);
  background: rgba(37,99,235,.05);
}

.sg-tab.active {
  color: var(--sg-primary);
  border-bottom-color: var(--sg-primary);
  background: rgba(37,99,235,.06);
}

/* --- Panels --- */
.sg-panels {
  padding: 24px 32px;
}

.sg-panel {
  display: none;
  animation: sg-fade-in 0.25s ease;
}

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

@keyframes sg-fade-in {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* --- Toolbar (Draw) --- */
.sg-toolbar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 14px;
}

.sg-tool-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.sg-tool-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--sg-muted);
  text-transform: uppercase;
  letter-spacing: .05em;
  white-space: nowrap;
}

/* Color swatches */
.sg-color-swatches {
  display: flex;
  align-items: center;
  gap: 6px;
}

.sg-swatch,
.sg-swatch-type {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
  outline: none;
}

.sg-swatch:hover,
.sg-swatch-type:hover {
  transform: scale(1.15);
  box-shadow: 0 0 0 3px rgba(37,99,235,.25);
}

.sg-swatch.active,
.sg-swatch-type.active {
  border-color: #fff;
  box-shadow: 0 0 0 3px var(--sg-primary);
}

.sg-color-input {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 2px solid var(--sg-border);
  cursor: pointer;
  padding: 0;
  overflow: hidden;
  outline: none;
  transition: transform 0.15s;
}

.sg-color-input:hover {
  transform: scale(1.15);
}

/* Thickness buttons */
.sg-thickness-btns {
  display: flex;
  align-items: center;
  gap: 6px;
}

.sg-thickness-btn {
  width: 36px;
  height: 28px;
  border: 1.5px solid var(--sg-border);
  border-radius: 6px;
  background: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 6px;
  transition: all 0.15s;
  outline: none;
}

.sg-thickness-btn span {
  display: block;
  width: 100%;
  border-radius: 99px;
  background: var(--sg-secondary);
}

.sg-thickness-btn:hover {
  border-color: var(--sg-primary);
  background: rgba(37,99,235,.05);
}

.sg-thickness-btn.active {
  border-color: var(--sg-primary);
  background: rgba(37,99,235,.08);
  box-shadow: 0 0 0 2px rgba(37,99,235,.2);
}

/* --- Canvas Wrap --- */
.sg-canvas-wrap {
  position: relative;
  border: 1.5px solid var(--sg-border);
  border-radius: var(--sg-radius);
  overflow: hidden;
  background: var(--sg-canvas-bg);
  background-image: 
    linear-gradient(rgba(0,0,0,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,0,0,0.02) 1px, transparent 1px);
  background-size: 24px 24px;
}

.sg-canvas-wrap canvas {
  display: block;
  width: 100%;
  cursor: crosshair;
  touch-action: none;
}

.sg-canvas-hint {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  color: #cbd5e1;
  pointer-events: none;
  transition: opacity 0.3s;
}

.sg-canvas-hint span {
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: .02em;
}

.sg-canvas-hint.hidden {
  opacity: 0;
}

/* --- Ghost Button --- */
.sg-btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border: 1.5px solid var(--sg-border);
  border-radius: 8px;
  background: #fff;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--sg-muted);
  transition: all 0.2s;
  margin-left: auto;
  outline: none;
}

.sg-btn-ghost:hover {
  border-color: #f87171;
  color: #ef4444;
  background: #fff5f5;
}

/* --- Type Tab --- */
.sg-type-controls {
  margin-bottom: 14px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.sg-input-wrap {
  position: relative;
}

.sg-type-input {
  width: 100%;
  padding: 13px 18px;
  border: 1.5px solid var(--sg-border);
  border-radius: 10px;
  font-family: inherit;
  font-size: 1rem;
  color: var(--sg-text);
  outline: none;
  background: #fff;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.sg-type-input:focus {
  border-color: var(--sg-primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,.12);
}

.sg-type-input::placeholder {
  color: #cbd5e1;
}

/* Font Grid */
.sg-font-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 8px;
}

.sg-font-btn {
  padding: 10px 12px;
  border: 1.5px solid var(--sg-border);
  border-radius: 8px;
  background: #fff;
  cursor: pointer;
  font-size: 1.2rem;
  color: var(--sg-text);
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: all 0.2s;
  outline: none;
  line-height: 1.2;
}

.sg-font-btn:hover {
  border-color: var(--sg-primary);
  background: rgba(37,99,235,.04);
  transform: translateY(-1px);
  box-shadow: 0 3px 10px rgba(0,0,0,.07);
}

.sg-font-btn.active {
  border-color: var(--sg-primary);
  background: rgba(37,99,235,.07);
  box-shadow: 0 0 0 3px rgba(37,99,235,.15);
  color: var(--sg-primary);
}

/* Type color row */
.sg-type-color-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* --- Upload Tab --- */
.sg-upload-zone {
  border: 2px dashed var(--sg-border);
  border-radius: var(--sg-radius);
  padding: 48px 24px;
  text-align: center;
  cursor: pointer;
  transition: all 0.25s;
  background: var(--sg-canvas-bg);
  margin-bottom: 4px;
}

.sg-upload-zone:hover,
.sg-upload-zone.drag-over {
  border-color: var(--sg-primary);
  background: rgba(37,99,235,.04);
}

.sg-upload-zone.drag-over {
  transform: scale(1.01);
}

.sg-upload-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.sg-upload-icon {
  width: 72px;
  height: 72px;
  background: linear-gradient(135deg, rgba(37,99,235,.1), rgba(37,99,235,.05));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--sg-primary);
  margin-bottom: 6px;
}

.sg-upload-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--sg-secondary);
}

.sg-upload-sub {
  font-size: 0.875rem;
  color: var(--sg-muted);
}

.sg-upload-link {
  background: none;
  border: none;
  color: var(--sg-primary);
  cursor: pointer;
  font-weight: 600;
  font-size: inherit;
  text-decoration: underline;
  font-family: inherit;
  outline: none;
}

.sg-upload-formats {
  font-size: 0.78rem;
  color: #94a3b8;
  margin-top: 2px;
}

.sg-upload-reset {
  position: absolute;
  top: 10px;
  right: 10px;
  margin-left: 0;
}

/* --- Footer --- */
.sg-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding: 20px 32px 24px;
  border-top: 1px solid var(--sg-border);
  background: linear-gradient(180deg, #fff 0%, #f8fafc 100%);
}

.sg-footer-info {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  color: var(--sg-muted);
  font-weight: 400;
}

.sg-btn-download {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 26px;
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: #fff;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.925rem;
  font-weight: 600;
  box-shadow: 0 4px 14px rgba(37,99,235,.35);
  transition: all 0.2s;
  outline: none;
  letter-spacing: .01em;
}

.sg-btn-download:hover {
  background: linear-gradient(135deg, #1d4ed8, #1e40af);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(37,99,235,.45);
}

.sg-btn-download:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(37,99,235,.3);
}

/* Download flash animation */
@keyframes sg-dl-flash {
  0%,100% { opacity:1; }
  50% { opacity:0.6; }
}

.sg-btn-download.downloading {
  animation: sg-dl-flash .4s ease;
}

/* --- Responsive --- */
@media (max-width: 600px) {
  .sg-wrapper { padding: 12px 8px; }
  .sg-header { padding: 20px 18px 16px; }
  .sg-tabs { padding: 12px 18px 0; gap: 2px; }
  .sg-tab { padding: 9px 12px; font-size: .8rem; }
  .sg-panels { padding: 18px 18px; }
  .sg-toolbar { gap: 10px; }
  .sg-font-grid { grid-template-columns: repeat(2, 1fr); }
  .sg-footer { padding: 16px 18px 20px; }
  .sg-btn-download { width: 100%; justify-content: center; }
  .sg-title { font-size: 1.2rem; }
}