/* IconForge theme system aligned with i18n-layout-template. */
:root {
  --primary-color: #4a90e2;
  --primary-color-hover: #357abd;
  --secondary-color: #8e8e93;
  --secondary-color-hover: #747479;
  --accent-color: #64d2ff;
  --success-color: #34c759;
  --error-color: #ff3b30;

  --bg-primary: #fbfbfb;
  --bg-secondary: #f5f5f5;
  --bg-tertiary: #f0f0f0;
  --text-primary: #333333;
  --text-secondary: #666666;
  --text-tertiary: #999999;
  --text-inverse: #fbfbfb;
  --border-primary: #e0e0e0;
  --border-secondary: #d0d0d0;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 8px 24px rgba(74, 144, 226, 0.12);
  --shadow-lg: 0 18px 46px rgba(74, 144, 226, 0.16);
  --glass-bg: rgba(251, 251, 251, 0.76);
  --glass-border: rgba(224, 224, 224, 0.82);
  --glass-shadow: var(--shadow-md);
  --glass-shadow-hover: 0 14px 36px rgba(74, 144, 226, 0.22);
  --glass-shadow-focus: 0 0 0 3px rgba(74, 144, 226, 0.3);
  --backdrop-blur: blur(14px);

  --gradient-primary: linear-gradient(135deg, #c6e7ff, #ffddae);
  --gradient-secondary: radial-gradient(
    circle at 0% 0%,
    rgba(198, 231, 255, 0.58) 0%,
    rgba(251, 251, 251, 0.94) 72%
  );
  --header-gradient: linear-gradient(135deg, rgba(198, 231, 255, 0.86), rgba(255, 221, 174, 0.6));
  --selection-bg: rgba(74, 144, 226, 0.24);
  --scrollbar-track: #f5f5f5;
  --scrollbar-thumb: #d0d0d0;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 999px;
  --transition-fast: 150ms ease;
  --transition-normal: 300ms ease;
}

[data-theme='dark'] {
  --primary-color: #90caf9;
  --primary-color-hover: #64b5f6;
  --secondary-color: #ce93d8;
  --secondary-color-hover: #ba68c8;
  --accent-color: #ce93d8;
  --success-color: #81c995;
  --error-color: #ff8a80;

  --bg-primary: #121212;
  --bg-secondary: #1e1e1e;
  --bg-tertiary: #282828;
  --text-primary: #e0e0e0;
  --text-secondary: #b0b0b0;
  --text-tertiary: #8f8f8f;
  --text-inverse: #121212;
  --border-primary: #333333;
  --border-secondary: #404040;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.24);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.28);
  --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.34);
  --glass-bg: rgba(18, 18, 18, 0.84);
  --glass-border: #333333;
  --glass-shadow: var(--shadow-md);
  --glass-shadow-hover: 0 14px 36px rgba(0, 0, 0, 0.38);
  --glass-shadow-focus: 0 0 0 3px rgba(144, 202, 249, 0.28);

  --gradient-primary: linear-gradient(292deg, hsl(210 68% 26%), hsla(0 0% 0% / 0.95));
  --gradient-secondary: radial-gradient(
    circle at 0% 0%,
    hsla(210 100% 23% / 0.2) 0%,
    var(--bg-primary) 72%
  );
  --header-gradient: linear-gradient(135deg, rgba(18, 18, 18, 0.7), rgba(30, 30, 30, 0.92));
  --selection-bg: rgba(144, 202, 249, 0.28);
  --scrollbar-track: #1e1e1e;
  --scrollbar-thumb: #404040;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  background: var(--gradient-primary);
  background-attachment: fixed;
  color-scheme: light;
  scrollbar-gutter: stable;
}

html[data-theme='dark'] {
  color-scheme: dark;
}

body {
  min-height: 100vh;
  padding: 2rem;
  background: var(--gradient-primary);
  background-attachment: fixed;
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  accent-color: var(--primary-color);
  transition: color var(--transition-normal), background var(--transition-normal);
}

::selection {
  background: var(--selection-bg);
  color: var(--text-primary);
}

:where(a, button, input, textarea, select, summary, [tabindex]):focus-visible {
  outline: 3px solid var(--primary-color);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 10000;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  background: var(--bg-primary);
  color: var(--text-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-180%);
  transition: transform var(--transition-fast);
}

.skip-link:focus {
  transform: translateY(0);
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 1rem auto 0;
  overflow: hidden;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  background: var(--glass-bg);
  box-shadow: var(--shadow-lg);
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
}

.header {
  position: sticky;
  top: 0.75rem;
  z-index: 100;
  width: min(100%, 1200px);
  margin: 0 auto;
  padding: 0.65rem clamp(0.65rem, 2vw, 1rem);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  background: var(--glass-bg);
  color: var(--text-primary);
  box-shadow: var(--shadow-md);
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
}

.header-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.header-brand {
  display: inline-flex;
  flex: 1 1 55%;
  min-width: 0;
  align-items: center;
  gap: 0.7rem;
  color: var(--text-primary);
  text-decoration: none;
}

.header-brand img {
  flex: 0 0 auto;
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  box-shadow: var(--shadow-sm);
}

.header-brand h1 {
  min-width: 0;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  font-size: clamp(1.05rem, 3vw, 1.35rem);
  letter-spacing: -0.02em;
}

.header-copy {
  padding: clamp(1.75rem, 5vw, 3rem) clamp(1rem, 3vw, 2rem);
  border-bottom: 1px solid var(--glass-border);
  background: var(--header-gradient);
  text-align: center;
}

.header-copy h2 {
  margin-bottom: 0.5rem;
  font-size: clamp(2rem, 5vw, 2.7rem);
  line-height: 1.15;
}

.header-copy p {
  max-width: 760px;
  margin: 0 auto;
  color: var(--text-secondary);
  font-size: 1.1rem;
  line-height: 1.6;
}

.header-actions {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 0.6rem;
}

.language-menu {
  position: relative;
}

.language-select {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

.language-menu__trigger,
.theme-toggle {
  display: inline-flex;
  height: 44px;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-full);
  background: linear-gradient(145deg, var(--bg-secondary), var(--bg-tertiary));
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
  font: inherit;
  font-weight: 700;
  transition: transform var(--transition-fast), border-color var(--transition-fast),
    box-shadow var(--transition-fast), background var(--transition-fast);
}

.language-menu__trigger {
  min-width: 132px;
  padding: 0 0.85rem;
}

.language-menu__flag {
  font-size: 1.05rem;
}

.language-menu__label {
  flex: 1;
  text-align: left;
}

.language-menu__chevron {
  width: 1rem;
  height: 1rem;
  color: var(--text-secondary);
  transform: rotate(180deg);
  transform-origin: center;
  transition: transform 240ms cubic-bezier(0.34, 1.56, 0.64, 1), color var(--transition-fast);
}

.language-menu__trigger[aria-expanded='true'] .language-menu__chevron {
  color: var(--primary-color);
  transform: rotate(0deg);
}

.language-menu__panel {
  position: absolute;
  z-index: 100;
  top: calc(100% + 0.55rem);
  right: 0;
  display: grid;
  width: min(210px, calc(100vw - 2rem));
  gap: 0.25rem;
  padding: 0.45rem;
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  background: color-mix(in srgb, var(--bg-primary) 94%, transparent);
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  animation: language-menu-in var(--transition-fast) both;
}

.language-menu__panel[hidden] {
  display: none;
}

.language-menu__option {
  display: grid;
  grid-template-columns: 1.5rem 1fr 1rem;
  align-items: center;
  gap: 0.6rem;
  width: 100%;
  padding: 0.7rem 0.75rem;
  border: 0;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--text-primary);
  cursor: pointer;
  font: inherit;
  text-align: left;
}

.language-menu__option:hover,
.language-menu__option:focus-visible {
  background: color-mix(in srgb, var(--primary-color) 14%, transparent);
}

.language-menu__option[aria-checked='true'] {
  background: color-mix(in srgb, var(--primary-color) 20%, var(--bg-secondary));
  color: var(--primary-color);
  font-weight: 800;
}

.language-menu__check {
  visibility: hidden;
}

.language-menu__option[aria-checked='true'] .language-menu__check {
  visibility: visible;
}

.theme-toggle {
  min-width: 118px;
  padding: 0.25rem 0.8rem 0.25rem 0.3rem;
}

.theme-toggle__icon {
  display: inline-grid;
  width: 34px;
  height: 34px;
  flex: 0 0 34px;
  place-items: center;
  border: 1px solid var(--border-primary);
  border-radius: 50%;
  background: var(--bg-primary);
  color: var(--primary-color);
  box-shadow: inset 0 1px 0 color-mix(in srgb, var(--text-primary) 12%, transparent);
  font-size: 1rem;
  line-height: 1;
}

.theme-toggle[data-theme-value='system'] .theme-toggle__icon {
  color: var(--accent-color);
}

.theme-toggle__label {
  min-width: 4.4rem;
  text-align: left;
}

@keyframes language-menu-in {
  from { opacity: 0; transform: translateY(-6px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.app-footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--glass-border);
  color: var(--text-secondary);
}

.app-footer a { color: var(--primary-color); font-weight: 700; }

.language-menu__trigger:hover,
.theme-toggle:hover {
  border-color: var(--primary-color);
  background: linear-gradient(145deg, var(--bg-tertiary), var(--bg-secondary));
  box-shadow: var(--glass-shadow-hover);
  transform: translateY(-2px);
}

.main-content {
  padding: clamp(1.25rem, 4vw, 2.5rem);
}

.upload-section {
  margin-bottom: 2rem;
  padding: clamp(2rem, 6vw, 3.5rem);
  border: 2px dashed var(--border-secondary);
  border-radius: var(--radius-lg);
  background: var(--gradient-secondary);
  color: var(--text-primary);
  text-align: center;
  cursor: pointer;
  transition: transform var(--transition-normal), border-color var(--transition-normal),
    box-shadow var(--transition-normal), background var(--transition-normal);
}

.upload-section:hover,
.upload-section.dragover {
  border-color: var(--primary-color);
  background: var(--glass-bg);
  box-shadow: var(--glass-shadow-hover);
  transform: translateY(-2px);
}

.upload-section.dragover {
  transform: scale(1.01);
}

.upload-icon {
  margin-bottom: 1rem;
  font-size: 4rem;
  opacity: 0.78;
}

.upload-text {
  margin-bottom: 1rem;
  color: var(--text-secondary);
  font-size: 1.15rem;
  line-height: 1.55;
}

.file-input {
  display: none;
}

.btn {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  margin: 0.5rem;
  padding: 0.75rem 1.5rem;
  border: 1px solid var(--primary-color);
  border-radius: var(--radius-md);
  background: var(--primary-color);
  color: var(--text-inverse);
  box-shadow: var(--shadow-sm);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--transition-fast), background-color var(--transition-fast),
    border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.btn:hover {
  border-color: var(--primary-color-hover);
  background: var(--primary-color-hover);
  box-shadow: var(--glass-shadow-hover);
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0);
}

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

.btn-secondary:hover {
  border-color: var(--secondary-color);
  background: var(--bg-tertiary);
}

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

.btn-danger {
  border-color: var(--error-color);
  background: var(--error-color);
  color: var(--text-inverse);
}

.preview-section {
  display: none;
  margin-top: 2rem;
}

.original-preview,
.control-group,
.icon-item,
.download-actions,
.manifest-preview {
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  background: var(--gradient-secondary);
  box-shadow: var(--glass-shadow);
}

.original-preview {
  margin-bottom: 2rem;
  padding: 1.5rem;
  text-align: center;
}

.original-preview h3,
.download-actions h3 {
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.image-container {
  position: relative;
  display: flex;
  min-height: 200px;
  align-items: center;
  justify-content: center;
}

.original-image {
  display: none;
  max-width: 200px;
  max-height: 200px;
  border: 2px dashed var(--border-secondary);
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  box-shadow: var(--shadow-sm);
  object-fit: contain;
}

.original-image.loaded {
  display: block;
  border: none;
}

.image-placeholder {
  display: flex;
  width: 200px;
  height: 200px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border: 2px dashed var(--border-secondary);
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  color: var(--text-secondary);
}

.image-placeholder.hidden {
  display: none;
}

.placeholder-icon {
  margin-bottom: 0.5rem;
  font-size: 3rem;
  opacity: 0.62;
}

.placeholder-text {
  padding: 0 0.75rem;
  font-size: 0.9rem;
  line-height: 1.4;
  text-align: center;
}

#imageInfo {
  margin-top: 0.9rem;
  color: var(--text-secondary);
}

.controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.control-group {
  padding: 1rem;
}

.control-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
  font-weight: 600;
}

.control-group input,
.control-group select {
  width: 100%;
  min-height: 42px;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-sm);
  background: var(--bg-primary);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
  font: inherit;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast),
    background-color var(--transition-fast);
}

.control-group input:focus,
.control-group select:focus {
  border-color: var(--primary-color);
  box-shadow: var(--glass-shadow-focus);
  outline: none;
}

.control-group input[type='range'] {
  min-height: 28px;
  padding: 0;
  border: 0;
  background: transparent;
  box-shadow: none;
}

.color-input-wrapper {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.3rem;
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  background: var(--bg-primary);
}

.control-group input[type='color'] {
  width: 50px;
  height: 40px;
  min-height: 40px;
  padding: 0;
  border: 0;
  border-radius: var(--radius-sm);
  background: transparent;
  box-shadow: none;
  cursor: pointer;
}

.control-group input[type='color']::-webkit-color-swatch-wrapper {
  padding: 0;
  border: 0;
}

.control-group input[type='color']::-webkit-color-swatch {
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-sm);
}

.color-preview {
  flex: 1;
  border: 0 !important;
  background: var(--bg-secondary) !important;
  color: var(--text-secondary) !important;
  box-shadow: none !important;
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', monospace !important;
  text-align: center;
}

.toggle-container {
  min-height: 44px;
}

.icons-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.icon-item {
  padding: 1rem;
  text-align: center;
  transition: transform var(--transition-normal), border-color var(--transition-normal),
    box-shadow var(--transition-normal);
}

.icon-item:hover {
  border-color: var(--primary-color);
  box-shadow: var(--glass-shadow-hover);
  transform: translateY(-2px);
}

.icon-canvas {
  width: 100%;
  max-width: 80px;
  height: auto;
  margin-bottom: 0.5rem;
  border-radius: var(--radius-sm);
}

.icon-size {
  margin-bottom: 0.5rem;
  color: var(--text-primary);
  font-weight: 600;
}

.icon-item .btn {
  width: 100%;
  margin: 0.5rem 0;
  padding-inline: 0.5rem;
}

.download-actions {
  margin-top: 2rem;
  padding: 2rem;
  text-align: center;
}

.progress-bar {
  width: 100%;
  height: 8px;
  margin: 1rem 0;
  overflow: hidden;
  border-radius: var(--radius-full);
  background: var(--bg-tertiary);
}

.progress-fill {
  width: 0%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--primary-color), var(--success-color));
  transition: width var(--transition-normal);
}

.manifest-preview {
  max-height: 300px;
  margin-top: 1rem;
  padding: 1rem;
  overflow: auto;
  color: var(--text-primary);
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', monospace;
  font-size: 0.9rem;
  line-height: 1.5;
  text-align: left;
  white-space: pre-wrap;
}

.status-message {
  margin: 1rem 0;
  padding: 1rem;
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  text-align: center;
}

.status-success {
  border-color: var(--success-color);
  background: color-mix(in srgb, var(--success-color) 14%, var(--bg-primary));
  color: var(--text-primary);
}

.status-error {
  border-color: var(--error-color);
  background: color-mix(in srgb, var(--error-color) 14%, var(--bg-primary));
  color: var(--text-primary);
}

.settings-status {
  margin-top: 0.5rem;
  color: var(--success-color);
  font-weight: 500;
  text-align: center;
  animation: fadeInOut 2s ease-in-out;
}

@keyframes fadeInOut {
  0%,
  100% {
    opacity: 0;
  }

  20%,
  80% {
    opacity: 1;
  }
}

* {
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
}

*::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

*::-webkit-scrollbar-track,
*::-webkit-scrollbar-corner {
  background: var(--scrollbar-track);
}

*::-webkit-scrollbar-thumb {
  min-width: 32px;
  min-height: 32px;
  border: 2px solid var(--scrollbar-track);
  border-radius: var(--radius-full);
  background: var(--scrollbar-thumb);
  background-clip: padding-box;
}

*::-webkit-scrollbar-thumb:hover {
  background: var(--primary-color);
  background-clip: padding-box;
}

@media (max-width: 768px) {
  body {
    padding: 1rem;
  }

  .header {
    padding: 0.85rem 1rem 1.8rem;
  }

  .header-copy h2 {
    font-size: 2rem;
  }

  .controls {
    grid-template-columns: 1fr;
  }

  .icons-grid {
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  }

  .download-actions {
    padding: 1.25rem;
  }

  .download-actions .btn {
    width: 100%;
    margin: 0.4rem 0;
  }
}

@media (max-width: 480px) {
  body {
    padding: 0.5rem;
  }

  .container {
    margin-top: 0.65rem;
    border-radius: var(--radius-lg);
  }

  .header {
    top: 0.5rem;
    padding: 0.45rem;
    border-radius: var(--radius-lg);
  }

  .main-content {
    padding: 1rem;
  }

  .header-toolbar {
    gap: 0.55rem;
  }

  .header-brand {
    flex-basis: 55%;
    gap: 0.45rem;
  }

  .header-brand img {
    width: 28px;
    height: 28px;
  }

  .header-brand h1 {
    font-size: 1rem;
  }

  .header-actions {
    gap: 0.4rem;
  }

  .language-menu__trigger,
  .theme-toggle {
    height: 40px;
  }

  .language-menu__trigger {
    width: 50px;
    min-width: 50px;
    padding: 0.2rem;
    gap: 0.15rem;
  }

  .language-menu__label {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
  }

  .theme-toggle {
    min-width: 40px;
    padding: 0.2rem;
  }

  .theme-toggle__icon {
    width: 32px;
    height: 32px;
    flex-basis: 32px;
  }

  .theme-toggle__label {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
  }

  .upload-section {
    padding: 2rem 1rem;
  }

  .upload-icon {
    font-size: 3rem;
  }

  .btn {
    width: 100%;
    margin: 0.4rem 0;
  }

  .app-footer { flex-direction: column; }
}

@media (prefers-contrast: high) {
  .container,
  .upload-section,
  .control-group,
  .original-preview,
  .icon-item,
  .download-actions,
  .theme-toggle,
  .language-menu__trigger,
  .language-menu__panel {
    border-width: 2px;
    border-color: var(--text-primary);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .upload-section:hover,
  .upload-section.dragover,
  .btn:hover,
  .icon-item:hover,
  .language-menu__trigger:hover,
  .theme-toggle:hover {
    transform: none;
  }
}