:root {
  --primary-color: #4a6bff;
  --primary-light: #6b8cff;
  --primary-dark: #2a4bdf;
  --text-color: #1a1a1a;
  --text-light: #4a5568;
  --bg-color: #f8fafc;
  --card-bg: #ffffff;
  --border-color: #e2e8f0;
  --border-radius: 12px;
  --border-radius-sm: 8px;
  --box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --box-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
}

[data-theme="dark"] {
  --primary-color: #5b7cff;
  --primary-light: #7d9dff;
  --primary-dark: #3a5bef;
  --text-color: #f8fafc;
  --text-light: #a0aec0;
  --bg-color: #1a202c;
  --card-bg: #2d3748;
  --border-color: #4a5568;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--bg-color);
  transition: var(--transition);
  min-height: 100vh;
}

h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.2;
}

h1 {
  font-size: 2.5rem;
  font-family: 'Playfair Display', serif;
}

h2 {
  font-size: 1.75rem;
}

h3 {
  font-size: 1.5rem;
}

h4 {
  font-size: 1.25rem;
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--primary-dark);
}

button {
  cursor: pointer;
  transition: var(--transition);
  border: none;
  background: none;
}

input {
  transition: var(--transition);
}

.app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  padding: var(--spacing-lg);
  max-width: 1400px;
  margin: 0 auto;
}

.app-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--spacing-xl);
}

.header-content {
  max-width: 600px;
}

.gradient-text {
  background: linear-gradient(90deg, #4a6bff, #8a2be2);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.beta-badge {
  display: inline-block;
  background-color: var(--primary-color);
  color: white;
  font-size: 0.8rem;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  margin-left: 0.5rem;
  vertical-align: super;
  font-family: 'Inter', sans-serif;
}

.subtitle {
  color: var(--text-light);
  font-size: 1.1rem;
  margin-top: var(--spacing-xs);
}

.theme-toggle {
  background-color: var(--card-bg);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--box-shadow);
  cursor: pointer;
}

.theme-toggle:hover {
  transform: scale(1.05);
}

.app-main {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
}

.color-controls {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
}

.color-input-card,
.palette-options-card,
.color-swatch-card,
.color-palette-card,
.content-card {
  background-color: var(--card-bg);
  border-radius: var(--border-radius);
  padding: var(--spacing-md);
  box-shadow: var(--box-shadow);
}

.palette-mode {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
}

.palette-mode label {
  font-weight: 500;
  color: var(--text-light);
}

.palette-mode select {
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  background-color: var(--card-bg);
  color: var(--text-color);
}

.section-title {
  color: var(--primary-color);
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.color-input-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.color-picker-wrapper {
  position: relative;
  width: 100%;
}

.color-picker-wrapper input[type="color"] {
  width: 100%;
  height: 60px;
  border-radius: var(--border-radius-sm);
  border: 1px solid var(--border-color);
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  padding: 0;
}

.color-picker-wrapper input[type="color"]::-webkit-color-swatch-wrapper {
  padding: 0;
}

.color-picker-wrapper input[type="color"]::-webkit-color-swatch {
  border: none;
  border-radius: var(--border-radius-sm);
}

.color-picker-wrapper label {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: white;
  font-weight: 500;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
  pointer-events: none;
}

.hex-input-group {
  display: flex;
  gap: var(--spacing-sm);
}

.input-wrapper {
  position: relative;
  flex: 1;
}

.hex-prefix {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-light);
  font-weight: 500;
}

input[type="text"] {
  width: 100%;
  padding: 0.75rem 1rem 0.75rem 2rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  font-size: 1rem;
  background-color: var(--card-bg);
  color: var(--text-color);
}

input[type="text"]:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(74, 107, 255, 0.2);
}

.primary-btn {
  background-color: var(--primary-color);
  color: white;
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius-sm);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.primary-btn:hover {
  background-color: var(--primary-dark);
  transform: translateY(-1px);
}

.primary-btn svg {
  width: 18px;
  height: 18px;
}

.palette-buttons {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: var(--spacing-sm);
}

.palette-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm);
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  color: var(--text-color);
}

.palette-btn:hover {
  background-color: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

.palette-icon {
  font-size: 1.8rem;
}

.palette-btn.active {
  border-color: var(--primary-color);
  color: var(--primary-color);
  box-shadow: 0 4px 12px rgba(74, 107, 255, 0.15);
}

.palette-btn.active .palette-icon {
  transform: scale(1.05);
}

.color-display {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
}

.color-swatch {
  height: 200px;
  border-radius: var(--border-radius-sm);
  position: relative;
  overflow: hidden;
  box-shadow: var(--box-shadow);
}

.color-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--spacing-xs);
  margin-top: var(--spacing-sm);
}

.ghost-btn {
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  padding: 0.4rem 0.9rem;
  font-size: 0.85rem;
  color: var(--text-color);
  background-color: transparent;
  transition: var(--transition);
}

.ghost-btn:hover,
.ghost-btn:focus-visible {
  border-color: var(--primary-color);
  color: var(--primary-color);
  outline: none;
  box-shadow: 0 0 0 2px rgba(74, 107, 255, 0.12);
}

.link-btn {
  border: none;
  background: none;
  color: var(--primary-color);
  font-weight: 600;
  cursor: pointer;
  padding: 0;
}

.link-btn:hover,
.link-btn:focus-visible {
  text-decoration: underline;
  outline: none;
}

.color-tip {
  font-size: 0.75rem;
  color: var(--text-light);
}

.color-info {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: rgba(0, 0, 0, 0.7);
  color: white;
  padding: var(--spacing-sm);
  display: flex;
  justify-content: space-between;
}

.color-palette {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--spacing-sm);
}

.palette-card-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
  margin-bottom: var(--spacing-sm);
}

.palette-meta {
  font-size: 0.85rem;
  color: var(--text-light);
}

.palette-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-sm);
}

.palette-color {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.color-box {
  height: 60px;
  border-radius: var(--border-radius-sm);
  box-shadow: var(--box-shadow);
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.color-box:hover {
  transform: translateY(-2px);
}

.color-box:focus-visible {
  outline: 2px solid var(--primary-color);
  outline-offset: 3px;
}

.color-code {
  font-size: 0.8rem;
  color: var(--text-light);
  text-align: center;
  font-family: monospace;
  user-select: none;
  cursor: pointer;
  padding: 0.35rem 0.5rem;
  border-radius: var(--border-radius-sm);
  background-color: var(--bg-color);
  transition: var(--transition);
  display: inline-block;
}

.color-code:hover,
.color-code:focus-visible {
  color: var(--primary-color);
  outline: none;
  box-shadow: 0 0 0 2px rgba(74, 107, 255, 0.12);
}

.saved-palettes-card {
  background-color: var(--card-bg);
  border-radius: var(--border-radius);
  padding: var(--spacing-md);
  box-shadow: var(--box-shadow);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

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

.saved-palettes {
  display: grid;
  gap: var(--spacing-sm);
}

.saved-palette {
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  padding: var(--spacing-sm);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  background-color: var(--bg-color);
}

.saved-palette-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.saved-name {
  font-weight: 600;
}

.saved-meta {
  font-size: 0.8rem;
  color: var(--text-light);
}

.saved-color {
  font-family: monospace;
  font-size: 0.85rem;
  color: var(--primary-dark);
}

.saved-palette-swatches {
  display: flex;
  gap: var(--spacing-xs);
  flex-wrap: wrap;
}

.saved-swatch {
  width: 32px;
  height: 32px;
  border-radius: var(--border-radius-sm);
  box-shadow: var(--box-shadow);
}

.saved-actions {
  display: flex;
  gap: var(--spacing-xs);
  flex-wrap: wrap;
}

.saved-actions button {
  border: 1px solid var(--border-color);
  background-color: transparent;
  border-radius: var(--border-radius-sm);
  padding: 0.3rem 0.7rem;
  font-size: 0.78rem;
  cursor: pointer;
  transition: var(--transition);
}

.saved-actions button:hover,
.saved-actions button:focus-visible {
  border-color: var(--primary-color);
  color: var(--primary-color);
  outline: none;
}

.empty-state {
  font-size: 0.85rem;
  color: var(--text-light);
}

.psychology-results {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.results-header {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.results-tabs {
  display: flex;
  border-bottom: 1px solid var(--border-color);
  overflow-x: auto;
}

.tab-btn {
  padding: var(--spacing-sm) var(--spacing-md);
  font-weight: 500;
  color: var(--text-light);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  border-bottom: 3px solid transparent;
  white-space: nowrap;
}

.tab-btn svg {
  width: 18px;
  height: 18px;
}

.tab-btn.active {
  color: var(--primary-color);
  border-bottom-color: var(--primary-color);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

.content-card {
  background-color: var(--card-bg);
  border-radius: var(--border-radius);
  padding: var(--spacing-md);
  box-shadow: var(--box-shadow);
}

.metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--spacing-xs) var(--spacing-sm);
  margin-top: var(--spacing-sm);
  background-color: var(--bg-color);
  padding: var(--spacing-sm);
  border-radius: var(--border-radius-sm);
  font-family: 'Fira Code', 'SFMono-Regular', Consolas, monospace;
  font-size: 0.85rem;
}

.metrics > div {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.metric-label {
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-light);
}

.chip-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  margin-top: var(--spacing-sm);
}

.chip {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 0.35rem 0.8rem;
  font-size: 0.75rem;
  font-weight: 600;
  background-color: rgba(74, 107, 255, 0.1);
  color: var(--primary-dark);
}

.chip-outline {
  border: 1px dashed var(--primary-color);
  background: transparent;
  color: var(--primary-color);
}

.harmony-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.harmony-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--spacing-sm);
  justify-content: space-between;
}

.harmony-label {
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.75rem;
  color: var(--text-light);
  min-width: 140px;
}

.harmony-swatches {
  display: flex;
  gap: var(--spacing-xs);
  flex-wrap: wrap;
}

.harmony-swatch {
  width: 34px;
  height: 34px;
  border-radius: var(--border-radius-sm);
  border: none;
  cursor: pointer;
  box-shadow: var(--box-shadow);
  transition: transform 0.2s ease;
}

.harmony-swatch:hover,
.harmony-swatch:focus-visible {
  transform: translateY(-2px);
  outline: 2px solid rgba(74, 107, 255, 0.4);
  outline-offset: 2px;
}

.strategy-header {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
}

.strategy-badge {
  align-self: flex-start;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  background-color: rgba(74, 107, 255, 0.1);
  color: var(--primary-dark);
}

.strategy-pill {
  width: 100%;
  height: 6px;
  border-radius: 999px;
  opacity: 0.85;
}

.strategy-grid {
  display: grid;
  gap: var(--spacing-sm);
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.strategy-card {
  background-color: var(--bg-color);
  border-radius: var(--border-radius-sm);
  padding: var(--spacing-sm);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.strategy-card h4 {
  font-size: 0.95rem;
}

.strategy-card ul {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--text-light);
}

.strategy-card li + li {
  margin-top: 0.35rem;
}

.emotion-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  margin-top: var(--spacing-md);
}

.tag {
  background-color: var(--primary-light);
  color: white;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-size: 0.8rem;
}

.example-palette {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

.example-swatch {
  width: 40px;
  height: 40px;
  border-radius: 4px;
  border: none;
  cursor: pointer;
  box-shadow: var(--box-shadow);
  transition: transform 0.2s ease;
}

.example-swatch:hover,
.example-swatch:focus-visible {
  transform: translateY(-2px);
  outline: 2px solid rgba(74, 107, 255, 0.3);
  outline-offset: 2px;
}

.accessibility-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
}

.accessibility-item {
  background-color: var(--bg-color);
  padding: var(--spacing-sm);
  border-radius: var(--border-radius-sm);
}

.readability-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.4rem 0.8rem;
  border-radius: var(--border-radius-sm);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.readability-pairings {
  display: flex;
  gap: var(--spacing-xs);
}

.readability-pairings span {
  width: 40px;
  height: 40px;
  border-radius: var(--border-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  box-shadow: var(--box-shadow);
}

.wcag-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  margin: var(--spacing-xs) 0 0;
  padding: 0;
}

.wcag-list li {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 0.85rem;
  color: var(--text-light);
}

.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 48px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  border-radius: 999px;
  padding: 0.2rem 0.5rem;
}

.badge-pass {
  background-color: rgba(34, 197, 94, 0.18);
  color: #15803d;
}

.badge-fail {
  background-color: rgba(248, 113, 113, 0.2);
  color: #b91c1c;
}

.app-footer {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-light);
  font-size: 0.9rem;
}

.footer-links {
  display: flex;
  gap: var(--spacing-md);
}

.footer-link {
  color: var(--text-light);
}

.footer-link:hover {
  color: var(--primary-color);
}

.toast {
  position: fixed;
  bottom: 32px;
  right: 32px;
  background-color: var(--card-bg);
  color: var(--text-color);
  padding: 0.75rem 1.1rem;
  border-radius: var(--border-radius-sm);
  box-shadow: var(--box-shadow-lg);
  opacity: 0;
  transform: translateY(20px);
  pointer-events: none;
  transition: all 0.3s ease;
  z-index: 50;
}

.toast.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 600px) {
  .toast {
    left: 16px;
    right: 16px;
    bottom: 16px;
  }
}

@media (min-width: 768px) {
  .app-main {
    grid-template-columns: 1fr 1fr;
  }

  .color-controls {
    grid-column: span 2;
    grid-template-columns: 1fr 1fr;
  }

  .color-display {
    grid-column: span 2;
    grid-template-columns: 1fr 1fr;
  }

  .saved-palettes-card {
    grid-column: span 2;
  }

  .psychology-results {
    grid-column: span 2;
  }
}

@media (min-width: 1024px) {
  .app-main {
    grid-template-columns: 1fr 1fr 1fr;
  }

  .color-controls {
    grid-column: span 3;
    grid-template-columns: 1fr 1fr;
  }

  .color-display {
    grid-column: span 3;
    grid-template-columns: 1fr 1fr;
  }

  .saved-palettes-card {
    grid-column: span 3;
  }

  .psychology-results {
    grid-column: span 3;
  }
}