:root {
  --color-primary: #2c5f7c;
  --color-primary-light: #3a7a99;
  --color-primary-dark: #1e4558;
  --color-accent: #5a9cb8;
  --color-accent-light: #7cb8cf;
  --color-bg: #f8fafc;
  --color-bg-soft: #f1f5f9;
  --color-bg-panel: #ffffff;
  --color-text: #1e293b;
  --color-text-muted: #64748b;
  --color-text-light: #94a3b8;
  --color-line: #e2e8f0;
  --color-line-strong: #cbd5e1;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.03);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.05);
  --font-xs: 0.875rem;
  --font-sm: 0.9375rem;
  --font-base: 1rem;
  --font-lg: 1.125rem;
  --font-xl: 1.375rem;
  --font-2xl: 1.75rem;
  --font-3xl: 2.25rem;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
}

[data-theme="dark"] {
  --color-primary: #4a90a4;
  --color-primary-light: #6ba8bc;
  --color-primary-dark: #3a7a92;
  --color-accent: #7cb8cf;
  --color-accent-light: #9dcfe0;
  --color-bg: #0f172a;
  --color-bg-soft: #1e293b;
  --color-bg-panel: #334155;
  --color-text: #f1f5f9;
  --color-text-muted: #94a3b8;
  --color-text-light: #64748b;
  --color-line: #334155;
  --color-line-strong: #475569;
  --color-success: #34d399;
  --color-warning: #fbbf24;
  --color-error: #f87171;
}

html {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  font-weight: 400;
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  min-height: 100vh;
}

* {
  box-sizing: border-box;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

h1, h2, h3 {
  margin: 0 0 var(--spacing-md) 0;
  font-weight: 600;
  line-height: 1.3;
}

h1 {
  font-size: var(--font-2xl);
}

h2 {
  font-size: var(--font-xl);
}

h3 {
  font-size: var(--font-lg);
}

p {
  margin: 0 0 var(--spacing-md) 0;
  font-size: var(--font-base);
  color: var(--color-text-muted);
}

.container {
  max-width: 1600px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 48px;
  min-height: 48px;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: var(--font-sm);
  font-weight: 500;
  text-align: center;
  border: none;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all 0.2s ease;
  background-color: var(--color-primary);
  color: #ffffff;
}

.btn:hover {
  background-color: var(--color-primary-light);
  box-shadow: var(--shadow-md);
}

.btn:active {
  transform: scale(0.98);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-outline:hover {
  background-color: rgba(44, 95, 124, 0.05);
}

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

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

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

.btn-success:hover {
  background-color: #059669;
}

.btn-warning {
  background-color: var(--color-warning);
}

.btn-warning:hover {
  background-color: #d97706;
}

.btn-error {
  background-color: var(--color-error);
}

.btn-error:hover {
  background-color: #dc2626;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.card {
  background-color: var(--color-bg-panel);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  padding: var(--spacing-lg);
  transition: all 0.2s ease;
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card-elevated {
  box-shadow: var(--shadow-md);
}

.card-elevated:hover {
  box-shadow: var(--shadow-lg);
}

.form-group {
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-size: var(--font-sm);
  font-weight: 500;
  color: var(--color-text);
}

.form-input {
  width: 100%;
  min-height: 48px;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-base);
  background-color: var(--color-bg-soft);
  border: 2px solid var(--color-line);
  border-radius: var(--radius-md);
  color: var(--color-text);
  transition: all 0.2s ease;
}

.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(44, 95, 124, 0.1);
}

.form-input::placeholder {
  color: var(--color-text-light);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-radio,
.form-checkbox {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
  padding: var(--spacing-sm);
  border-radius: var(--radius-md);
  transition: background-color 0.2s ease;
}

.form-radio:hover,
.form-checkbox:hover {
  background-color: var(--color-bg-soft);
}

.form-radio input[type="radio"],
.form-checkbox input[type="checkbox"] {
  width: 20px;
  height: 20px;
  accent-color: var(--color-primary);
}

.form-radio label,
.form-checkbox label {
  font-size: var(--font-sm);
  color: var(--color-text);
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 500;
  border-radius: 9999px;
}

.badge-primary {
  background-color: rgba(44, 95, 124, 0.1);
  color: var(--color-primary);
}

.badge-success {
  background-color: rgba(16, 185, 129, 0.1);
  color: var(--color-success);
}

.badge-warning {
  background-color: rgba(245, 158, 11, 0.1);
  color: var(--color-warning);
}

.badge-error {
  background-color: rgba(239, 68, 68, 0.1);
  color: var(--color-error);
}

.badge-muted {
  background-color: var(--color-bg-soft);
  color: var(--color-text-muted);
}

.grid {
  display: grid;
  gap: var(--spacing-md);
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.items-center {
  align-items: center;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.gap-xs {
  gap: var(--spacing-xs);
}

.gap-sm {
  gap: var(--spacing-sm);
}

.gap-md {
  gap: var(--spacing-md);
}

.gap-lg {
  gap: var(--spacing-lg);
}

.text-center {
  text-align: center;
}

.text-muted {
  color: var(--color-text-muted);
}

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

.text-primary {
  color: var(--color-primary);
}

.mb-xs {
  margin-bottom: var(--spacing-xs);
}

.mb-sm {
  margin-bottom: var(--spacing-sm);
}

.mb-md {
  margin-bottom: var(--spacing-md);
}

.mb-lg {
  margin-bottom: var(--spacing-lg);
}

.mt-xs {
  margin-top: var(--spacing-xs);
}

.mt-sm {
  margin-top: var(--spacing-sm);
}

.mt-md {
  margin-top: var(--spacing-md);
}

.mt-lg {
  margin-top: var(--spacing-lg);
}

.p-xs {
  padding: var(--spacing-xs);
}

.p-sm {
  padding: var(--spacing-sm);
}

.p-md {
  padding: var(--spacing-md);
}

.p-lg {
  padding: var(--spacing-lg);
}

.p-xl {
  padding: var(--spacing-xl);
}

@media (max-width: 768px) {
  :root {
    --font-xl: 1.25rem;
    --font-2xl: 1.5rem;
    --font-3xl: 2rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .container {
    padding: 0 var(--spacing-sm);
  }
}

@media (prefers-color-scheme: dark) {
  html {
    color-scheme: dark;
  }
}

.theme-toggle {
  position: fixed;
  bottom: var(--spacing-lg);
  right: var(--spacing-lg);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--color-bg-panel);
  box-shadow: var(--shadow-md);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  z-index: 100;
}

.theme-toggle:hover {
  box-shadow: var(--shadow-lg);
  transform: scale(1.05);
}

.theme-toggle:active {
  transform: scale(0.95);
}

.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  animation: fadeIn 0.2s ease;
}

.modal-content {
  background-color: var(--color-bg-panel);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  max-width: 480px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  animation: slideUp 0.2s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.close-btn {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  width: 36px;
  height: 36px;
  border: none;
  background-color: transparent;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
  color: var(--color-text-muted);
}

.close-btn:hover {
  background-color: var(--color-bg-soft);
  color: var(--color-text);
}