:root {
  /* Light Theme */
  --bg-primary: #fafafa;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f5f5f5;
  --text-primary: #1a1a1a;
  --text-secondary: #666666;
  --text-muted: #999999;
  --border-color: #e0e0e0;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.12);

  /* Accent Colors */
  --accent-primary: #6366f1;
  --accent-secondary: #8b5cf6;
  --accent-success: #10b981;
  --accent-warning: #f59e0b;
  --accent-error: #ef4444;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  --gradient-secondary: linear-gradient(135deg, #10b981 0%, #059669 100%);
  --gradient-bg: linear-gradient(135deg, #fafafa 0%, #f0f0f0 100%);

  /* Glass Effect */
  --glass-bg: rgba(255, 255, 255, 0.25);
  --glass-border: rgba(255, 255, 255, 0.18);
  --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);

  /* Transitions */
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: all 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

[data-theme="dark"] {
  --bg-primary: #0f0f0f;
  --bg-secondary: #1a1a1a;
  --bg-tertiary: #262626;
  --text-primary: #ffffff;
  --text-secondary: #cccccc;
  --text-muted: #888888;
  --border-color: #333333;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.4);

  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.5);

  --gradient-bg: linear-gradient(135deg, #0f0f0f 0%, #1a1a1a 100%);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--gradient-bg);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  transition: var(--transition);
}

.app {
  min-height: 100vh;
  position: relative;
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  padding: 1rem 0;
}

.header-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.logo-icon {
  width: 48px;
  height: 48px;
  background: var(--gradient-primary);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.5rem;
  box-shadow: var(--shadow);
}

.logo h1 {
  font-size: 1.75rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header-controls {
  display: flex;
  gap: 1rem;
  align-items: center;
}

/* Buttons */
.btn-primary,
.btn-secondary,
.btn-outline {
  padding: 0.75rem 1.5rem;
  border-radius: 12px;
  border: none;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.95rem;
  text-decoration: none;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: var(--shadow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow);
}

.btn-secondary:hover {
  background: var(--bg-tertiary);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.btn-outline:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border-color: var(--accent-primary);
  transform: translateY(-2px);
}

/* Main Content */
.main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 3rem 2rem;
}

/* Palette Section */
.palette-section {
  margin-bottom: 4rem;
}

.palette-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.color-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: 0;
  overflow: hidden;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: var(--glass-shadow);
  position: relative;
}

.color-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.15);
}

.color-preview {
  height: 160px;
  position: relative;
  overflow: hidden;
}

.color-preview::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(45deg, transparent 30%, rgba(255, 255, 255, 0.1) 50%, transparent 70%);
  transform: translateX(-100%);
  transition: transform 0.6s ease;
}

.color-card:hover .color-preview::before {
  transform: translateX(100%);
}

.color-info {
  padding: 1.5rem;
  text-align: center;
}

.color-name {
  font-weight: 600;
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.color-values {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.color-value {
  font-family: "Monaco", "Menlo", monospace;
  font-size: 0.85rem;
  color: var(--text-secondary);
  padding: 0.25rem 0.5rem;
  background: var(--bg-tertiary);
  border-radius: 6px;
  cursor: pointer;
  transition: var(--transition);
}

.color-value:hover {
  background: var(--accent-primary);
  color: white;
  transform: scale(1.05);
}

.palette-info {
  text-align: center;
  margin-top: 2rem;
}

.palette-info h2 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.palette-info p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* Controls Section */
.controls-section {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: 2rem;
  margin-bottom: 3rem;
  box-shadow: var(--glass-shadow);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.control-group label {
  font-weight: 500;
  color: var(--text-primary);
  font-size: 0.95rem;
}

.select-input,
.text-input {
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 0.95rem;
  transition: var(--transition);
}

.select-input:focus,
.text-input:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.color-input-wrapper {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

.color-input {
  width: 60px;
  height: 45px;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.color-input::-webkit-color-swatch-wrapper {
  padding: 0;
}

.color-input::-webkit-color-swatch {
  border: none;
  border-radius: 12px;
}

.range-input-wrapper {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.range-input {
  flex: 1;
  height: 6px;
  border-radius: 3px;
  background: var(--bg-tertiary);
  outline: none;
  -webkit-appearance: none;
}

.range-input::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--gradient-primary);
  cursor: pointer;
  box-shadow: var(--shadow);
}

.range-input::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--gradient-primary);
  cursor: pointer;
  border: none;
  box-shadow: var(--shadow);
}

/* Actions Section */
.actions-section {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 4rem;
}

/* Saved Section */
.saved-section {
  margin-bottom: 3rem;
}

.saved-section h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

.saved-palettes {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.saved-palette {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 1rem;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: var(--glass-shadow);
}

.saved-palette:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.saved-palette-colors {
  display: flex;
  height: 60px;
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 1rem;
}

.saved-color {
  flex: 1;
  transition: var(--transition);
}

.saved-color:hover {
  flex: 1.5;
}

.saved-palette-name {
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.saved-palette-date {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Modal */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(10px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal.active {
  display: flex;
}

.modal-content {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 2rem;
  width: 90%;
  max-width: 500px;
  box-shadow: var(--shadow-lg);
  animation: modalSlideIn 0.3s ease;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
}

.close-btn {
  background: none;
  border: none;
  font-size: 1.25rem;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 8px;
  transition: var(--transition);
}

.close-btn:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.export-format {
  margin-bottom: 1.5rem;
}

.export-format label {
  display: block;
  margin-bottom: 0.75rem;
  font-weight: 500;
  color: var(--text-primary);
}

.format-buttons {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.format-btn {
  padding: 0.5rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
  font-size: 0.85rem;
}

.format-btn.active,
.format-btn:hover {
  background: var(--accent-primary);
  color: white;
  border-color: var(--accent-primary);
}

.export-content {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

#exportText {
  width: 100%;
  height: 200px;
  padding: 1rem;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-family: "Monaco", "Menlo", monospace;
  font-size: 0.85rem;
  resize: vertical;
}

/* Notifications */
.notifications {
  position: fixed;
  top: 100px;
  right: 20px;
  z-index: 1001;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.notification {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  padding: 1rem 1.5rem;
  color: var(--text-primary);
  box-shadow: var(--glass-shadow);
  animation: notificationSlideIn 0.3s ease;
  max-width: 300px;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.notification.success {
  border-left: 4px solid var(--accent-success);
}

.notification.error {
  border-left: 4px solid var(--accent-error);
}

.notification.warning {
  border-left: 4px solid var(--accent-warning);
}

/* Background Animation */
.bg-animation {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
  overflow: hidden;
}

.floating-shape {
  position: absolute;
  border-radius: 50%;
  background: var(--gradient-primary);
  opacity: 0.1;
  animation: float 20s infinite linear;
}

.shape-1 {
  width: 80px;
  height: 80px;
  top: 20%;
  left: 10%;
  animation-delay: 0s;
}

.shape-2 {
  width: 120px;
  height: 120px;
  top: 60%;
  right: 15%;
  animation-delay: -5s;
}

.shape-3 {
  width: 60px;
  height: 60px;
  top: 80%;
  left: 20%;
  animation-delay: -10s;
}

.shape-4 {
  width: 100px;
  height: 100px;
  top: 30%;
  right: 30%;
  animation-delay: -15s;
}

.shape-5 {
  width: 140px;
  height: 140px;
  top: 70%;
  left: 60%;
  animation-delay: -8s;
}

/* Animations */
@keyframes float {
  0% {
    transform: translateY(0px) rotate(0deg);
  }
  33% {
    transform: translateY(-30px) rotate(120deg);
  }
  66% {
    transform: translateY(30px) rotate(240deg);
  }
  100% {
    transform: translateY(0px) rotate(360deg);
  }
}

@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: translateY(-50px) scale(0.9);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes notificationSlideIn {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes pulse {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

/* Responsive Design */
@media (max-width: 768px) {
  .header-content {
    padding: 0 1rem;
  }

  .main {
    padding: 2rem 1rem;
  }

  .palette-container {
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
  }

  .controls-section {
    grid-template-columns: 1fr;
    padding: 1.5rem;
  }

  .actions-section {
    gap: 0.75rem;
  }

  .btn-primary,
  .btn-secondary,
  .btn-outline {
    padding: 0.6rem 1.2rem;
    font-size: 0.9rem;
  }

  .logo h1 {
    font-size: 1.5rem;
  }

  .palette-info h2 {
    font-size: 2rem;
  }

  .saved-palettes {
    grid-template-columns: 1fr;
  }

  .modal-content {
    margin: 1rem;
    padding: 1.5rem;
  }

  .format-buttons {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .header-controls {
    gap: 0.5rem;
  }

  .logo {
    gap: 0.75rem;
  }

  .logo-icon {
    width: 40px;
    height: 40px;
    font-size: 1.25rem;
  }

  .color-input-wrapper {
    flex-direction: column;
    align-items: stretch;
  }

  .range-input-wrapper {
    flex-direction: column;
    align-items: stretch;
    gap: 0.5rem;
  }

  .palette-container {
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  }

  .color-preview {
    height: 120px;
  }

  .color-info {
    padding: 1rem;
  }
}

/* Copy feedback animation */
.copied {
  animation: pulse 0.3s ease;
}

/* Loading state */
.loading {
  opacity: 0.7;
  pointer-events: none;
}

.loading::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  margin: -10px 0 0 -10px;
  border: 2px solid var(--accent-primary);
  border-top: 2px solid transparent;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}
