/* ============================================================
   Favicon Generator — CrafterTools
   ============================================================ */

/* ---------- CSS Variables ---------- */
:root {
  --color-bg: #f5f7fb;
  --color-surface: #ffffff;
  --color-surface-2: #f0f2f7;
  --color-border: #e2e6ee;
  --color-text: #1a2233;
  --color-text-muted: #6b7688;
  --color-primary: #4f46e5;
  --color-primary-hover: #4338ca;
  --color-primary-light: #eef0ff;
  --color-secondary: #e8eaf2;
  --color-secondary-hover: #d9dceb;
  --color-error-bg: #fef2f2;
  --color-error-text: #b91c1c;
  --color-error-border: #fecaca;
  --color-success: #16a34a;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 999px;

  --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.05);
  --shadow-md: 0 4px 14px rgba(16, 24, 40, 0.07);
  --shadow-lg: 0 12px 40px rgba(16, 24, 40, 0.10);

  --space-xs: 6px;
  --space-sm: 10px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 36px;
  --space-2xl: 56px;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --transition: 180ms cubic-bezier(0.4, 0, 0.2, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0d1117;
    --color-surface: #161b25;
    --color-surface-2: #1e2430;
    --color-border: #2a3140;
    --color-text: #e6eaf2;
    --color-text-muted: #8b95a7;
    --color-primary: #7c6cff;
    --color-primary-hover: #6a58f0;
    --color-primary-light: #221f3d;
    --color-secondary: #232a38;
    --color-secondary-hover: #2c3444;
    --color-error-bg: #2a1a1c;
    --color-error-text: #fca5a5;
    --color-error-border: #5b2a2e;
    --color-success: #4ade80;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.45);
  }
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  transition: background var(--transition), color var(--transition);
}

img, canvas, svg { display: block; max-width: 100%; }

button { font-family: inherit; }

/* ---------- Accessibility ---------- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  padding: 10px 16px;
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-sm);
  z-index: 1000;
}
.skip-link:focus { left: 12px; top: 12px; }

:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* ---------- Header ---------- */
.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-md) 0;
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: saturate(180%) blur(8px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.logo {
  font-size: 1.15rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.breadcrumb {
  display: flex;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}
.breadcrumb a {
  color: var(--color-text-muted);
  text-decoration: none;
}
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb li + li::before {
  content: "/";
  margin-right: 6px;
  color: var(--color-border);
}

/* ---------- Tool Section ---------- */
.tool-section {
  padding: var(--space-2xl) 0 var(--space-xl);
}

.tool-header {
  text-align: center;
  margin-bottom: var(--space-lg);
}

.tool-header h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin: 0 0 var(--space-xs);
  letter-spacing: -0.02em;
  font-weight: 800;
}

.subtitle {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 1.02rem;
  max-width: 640px;
  margin-inline: auto;
}

.privacy-badge {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  background: var(--color-primary-light);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  padding: 10px 18px;
  font-size: 0.88rem;
  margin: 0 auto var(--space-lg);
  max-width: 620px;
  justify-content: center;
  text-align: center;
  flex-wrap: wrap;
}
.privacy-badge strong { font-weight: 600; }

/* ---------- Tool Grid ---------- */
.tool-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

@media (min-width: 900px) {
  .tool-grid { grid-template-columns: 1fr 1fr; }
}

/* ---------- Cards ---------- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-md);
  transition: box-shadow var(--transition), border-color var(--transition);
}

.card-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0 0 var(--space-md);
  letter-spacing: -0.01em;
}

/* ---------- Drop Zone ---------- */
.drop-zone {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-xl) var(--space-md);
  text-align: center;
  background: var(--color-surface-2);
  transition: border-color var(--transition), background var(--transition), transform var(--transition);
  cursor: pointer;
  position: relative;
}

.drop-zone:hover,
.drop-zone:focus-visible {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}

.drop-zone.dragover {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
  transform: scale(1.01);
}

.drop-zone-content { pointer-events: none; }
.drop-zone-content .btn { pointer-events: auto; }

.drop-icon {
  font-size: 2.4rem;
  display: block;
  margin-bottom: var(--space-sm);
}

.drop-zone p {
  margin: 4px 0;
  font-size: 0.95rem;
}
.drop-zone p.muted {
  color: var(--color-text-muted);
  font-size: 0.85rem;
}
.drop-zone p.small { font-size: 0.78rem; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: none;
  border-radius: var(--radius-sm);
  padding: 10px 18px;
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  text-decoration: none;
  line-height: 1.3;
  user-select: none;
}

.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(79, 70, 229, 0.25);
}
.btn-primary:hover { background: var(--color-primary-hover); }

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

.btn-block {
  display: flex;
  width: 100%;
  margin-top: var(--space-md);
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

/* ---------- Error ---------- */
.error-msg {
  background: var(--color-error-bg);
  color: var(--color-error-text);
  border: 1px solid var(--color-error-border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  margin-top: var(--space-md);
  font-size: 0.9rem;
}

/* ---------- Editor ---------- */
.editor-area { margin-top: var(--space-lg); }

.crop-wrapper {
  position: relative;
  background: repeating-conic-gradient(#e2e6ee 0% 25%, #f0f2f7 0% 50%) 50% / 20px 20px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  display: flex;
  justify-content: center;
  align-items: center;
  padding: var(--space-md);
  touch-action: none;
}

@media (prefers-color-scheme: dark) {
  .crop-wrapper {
    background: repeating-conic-gradient(#2a3140 0% 25%, #1e2430 0% 50%) 50% / 20px 20px;
  }
}

#cropCanvas {
  width: 100%;
  max-width: 340px;
  height: auto;
  aspect-ratio: 1 / 1;
  border-radius: var(--radius-sm);
  cursor: grab;
  touch-action: none;
  background: transparent;
}
#cropCanvas:active { cursor: grabbing; }

/* ---------- Controls ---------- */
.controls {
  margin-top: var(--space-md);
  display: grid;
  gap: var(--space-md);
}

.control-group {
  display: grid;
  grid-template-columns: 80px 1fr auto;
  align-items: center;
  gap: var(--space-sm);
}

.control-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

.control-group input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  background: var(--color-secondary);
  border-radius: var(--radius-full);
  outline: none;
  cursor: pointer;
}

.control-group input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--color-primary);
  cursor: pointer;
  border: 2px solid var(--color-surface);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.25);
}
.control-group input[type="range"]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--color-primary);
  cursor: pointer;
  border: 2px solid var(--color-surface);
}

.control-group input[type="color"] {
  width: 44px;
  height: 34px;
  padding: 2px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  cursor: pointer;
}

.control-value {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  min-width: 46px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.checkbox-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--color-text-muted);
  cursor: pointer;
  white-space: nowrap;
}
.checkbox-label input { accent-color: var(--color-primary); }

.control-actions {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}
.control-actions .btn { flex: 1 1 auto; }

/* ---------- Preview ---------- */
.live-preview { margin-bottom: var(--space-lg); }

.live-preview h3 {
  font-size: 0.95rem;
  font-weight: 700;
  margin: 0 0 var(--space-sm);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.browser-mockup {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  overflow: hidden;
}

.browser-tab {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--color-surface);
  padding: 8px 16px;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  font-size: 0.85rem;
  font-weight: 500;
  border: 1px solid var(--color-border);
  border-bottom: none;
  margin: 8px 0 0 8px;
  max-width: 200px;
}

.browser-tab img {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  border-radius: 2px;
}

.browser-tab span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.browser-bar {
  height: 14px;
  background: var(--color-surface-2);
  border-top: 1px solid var(--color-border);
}

/* ---------- Results ---------- */
.results-area { margin-top: var(--space-md); }

.results-area h3 {
  font-size: 0.95rem;
  font-weight: 700;
  margin: 0 0 var(--space-sm);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.file-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-xs);
  max-height: 340px;
  overflow-y: auto;
  padding-right: 4px;
}

.file-list::-webkit-scrollbar { width: 8px; }
.file-list::-webkit-scrollbar-track { background: transparent; }
.file-list::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: var(--radius-full);
}

.file-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 8px 12px;
  background: var(--color-surface-2);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  transition: border-color var(--transition), background var(--transition);
}

.file-item:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}

.file-item img {
  width: 28px;
  height: 28px;
  object-fit: contain;
  border-radius: 4px;
  flex-shrink: 0;
  background: var(--color-bg);
  padding: 2px;
  border: 1px solid var(--color-border);
}

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

.file-name {
  font-size: 0.83rem;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

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

.file-item .btn {
  padding: 6px 12px;
  font-size: 0.78rem;
  flex-shrink: 0;
}

/* ---------- HTML Snippet ---------- */
.html-snippet { margin-top: var(--space-lg); }

.html-snippet h3 {
  font-size: 0.95rem;
  font-weight: 700;
  margin: 0 0 var(--space-sm);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.code-block {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-md);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.6;
  overflow-x: auto;
  white-space: pre;
  margin: 0 0 var(--space-sm);
  color: var(--color-text);
}

/* ---------- SEO Section ---------- */
.seo-section {
  padding: var(--space-2xl) 0;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
}

.seo-section article {
  max-width: 820px;
  margin: 0 auto;
}

.seo-section h2 {
  font-size: 1.4rem;
  font-weight: 800;
  margin: var(--space-xl) 0 var(--space-sm);
  letter-spacing: -0.01em;
}
.seo-section h2:first-child { margin-top: 0; }

.seo-section p,
.seo-section li {
  color: var(--color-text-muted);
  font-size: 0.96rem;
}

.seo-section ul,
.seo-section ol { padding-left: 1.3rem; }

.seo-section code {
  background: var(--color-surface-2);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.85em;
}

.seo-section details {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-md);
  margin-bottom: var(--space-sm);
  transition: border-color var(--transition);
}
.seo-section details[open] { border-color: var(--color-primary); }

.seo-section summary {
  cursor: pointer;
  font-weight: 600;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-text);
}
.seo-section summary::-webkit-details-marker { display: none; }
.seo-section summary::after {
  content: "＋";
  font-size: 1.1rem;
  color: var(--color-primary);
  transition: transform var(--transition);
  flex-shrink: 0;
}
.seo-section details[open] summary::after {
  content: "−";
}
.seo-section details p {
  margin: var(--space-sm) 0 0;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: var(--space-lg) 0;
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}
.site-footer p { margin: 0; }

/* ---------- Animations ---------- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.editor-area,
.results-area,
.html-snippet,
.error-msg {
  animation: fadeInUp 240ms ease-out;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---------- Mobile tweaks ---------- */
@media (max-width: 500px) {
  .control-group {
    grid-template-columns: 1fr;
    gap: 4px;
  }
  .control-value { text-align: left; }
  .card { padding: var(--space-md); }
  .tool-section { padding: var(--space-lg) 0; }
  .privacy-badge { font-size: 0.8rem; padding: 8px 14px; }
  .file-item .btn { padding: 6px 10px; }
}