/* Optimized for Render Performance */
:root {
  /* Consolidated Color Variables */
  --color-white: #ffffff;
  --color-black: #000000;
  --color-gray-200: #f5f5f5;
  --color-gray-300: #a7a9a9;
  --color-gray-400: #777c7c;
  --color-slate-500: #626c71;
  --color-brown-600: #5e5240;
  --color-charcoal-700: #1f2121;
  --color-charcoal-800: #262828;
  --color-slate-900: #13343b;
  --color-teal-300: #32b8c6;
  --color-teal-400: #2da6b2;
  --color-teal-500: #21808d;
  --color-teal-600: #1d7480;
  --color-teal-700: #1a6873;
  --color-teal-800: #2996a1;
  --color-red-400: #ff5459;
  --color-red-500: #c0152f;
  --color-orange-400: #e68161;
  --color-orange-500: #a84b2f;
  
  /* Simplified RGB variables */
  --color-brown-600-rgb: 94, 82, 64;
  --color-teal-500-rgb: 33, 128, 141;
  --color-slate-900-rgb: 19, 52, 59;
  
  /* Unified Theme Variables */
  --color-background: var(--color-white);
  --color-surface: #fcfcf9;
  --color-text: var(--color-slate-900);
  --color-text-secondary: var(--color-slate-500);
  --color-primary: #14b8a6;
  --color-primary-hover: #0f9488;
  --color-primary-active: #0d7377;
  --color-accent: #fbbf24;
  --color-accent-hover: #f59e0b;
  --color-accent-active: #d97706;
  --color-border: rgba(94, 82, 64, 0.2);
  --color-error: var(--color-red-500);
  --color-success: var(--color-teal-500);
  
  /* Optimized Typography */
  --font-family-base: "Poppins", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-family-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --line-height-normal: 1.5;
  
  /* Simplified Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-4: 1rem;
  --space-8: 2rem;
  
  /* Optimized Border Radius */
  --radius-sm: 0.375rem;
  --radius-base: 0.5rem;
  --radius-lg: 0.75rem;
  
  /* Performance-friendly Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.04);
  
  /* Animation Optimization */
  --duration-normal: 0.25s;
  
  /* Layout */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
}

/* Media Query Consolidation */
@media (prefers-color-scheme: dark) {
  :root {
    --color-background: #1f2121;
    --color-surface: #262828;
    --color-text: #f5f5f5;
    --color-text-secondary: rgba(167, 169, 169, 0.7);
    --color-primary: #32b8c6;
    --color-primary-hover: #2da6b2;
    --color-border: rgba(119, 124, 124, 0.3);
  }
}

/* Base Styles - Optimized */
html, body {
  margin: 0;
  padding: 0;
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
}

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

/* Optimized Typography */
h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--space-4) 0;
  font-weight: var(--font-weight-semibold);
  line-height: 1.2;
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }

p {
  margin: 0 0 var(--space-4) 0;
}

a {
  color: var(--color-primary);
  transition: color var(--duration-normal);
}
a:hover { color: var(--color-primary-hover); }

/* Performance-optimized Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-base);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: background-color var(--duration-normal);
  border: none;
  text-decoration: none;
}

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

.btn--secondary {
  background: rgba(251, 191, 36, 0.1);
  color: var(--color-text);
}
.btn--secondary:hover { background: rgba(251, 191, 36, 0.2); }

/* Optimized Form Elements */
.form-control {
  display: block;
  width: 100%;
  padding: 0.5rem 0.75rem;
  font-size: var(--font-size-base);
  color: var(--color-text);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-base);
  transition: border-color var(--duration-normal);
}

/* Card Component - Simplified */
.card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.card__body {
  padding: 1rem;
}

/* Performance-focused Layout */
.container {
  width: 100%;
  max-width: var(--container-lg);
  margin: 0 auto;
  padding: 0 1rem;
}

/* Utility Classes - Optimized */
.flex { display: flex; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.mt-4 { margin-top: var(--space-4); }
.p-4 { padding: var(--space-4); }
.text-center { text-align: center; }

/* Mobile Optimization */
@media (max-width: 768px) {
  :root {
    --font-size-4xl: 1.875rem;
    --font-size-3xl: 1.5rem;
    --space-8: 1.5rem;
  }
  
  .container {
    padding: 0 0.75rem;
  }
}

/* Animation Performance */
* {
  will-change: transform, opacity;
  backface-visibility: hidden;
}