frontend/src/index.css

@import url("https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Plus+Jakarta+Sans:wght@600;700;800&display=swap");

:root {
  /* Typography */
  --body-font: "Inter", "Segoe UI", -apple-system, BlinkMacSystemFont, sans-serif;
  --display-font: "Plus Jakarta Sans", "Trebuchet MS", sans-serif;

  /* Color Palette */
  --text-primary: #0f172a;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;

  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-gradient: linear-gradient(135deg, #f0f4f8 0%, #f8f9fb 100%);

  --border-light: rgba(15, 23, 42, 0.08);
  --border-medium: rgba(15, 23, 42, 0.12);
  --border-dark: rgba(15, 23, 42, 0.2);

  --accent-primary: #3b82f6;
  --accent-secondary: #8b5cf6;
  --success: #10b981;
  --error: #ef4444;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.08);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.1);
  --shadow-lg: 0 10px 30px rgba(15, 23, 42, 0.15);
  --shadow-xl: 0 20px 60px rgba(15, 23, 42, 0.2);

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 12px;
  --space-lg: 16px;
  --space-xl: 24px;
  --space-2xl: 32px;
  --space-3xl: 48px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Borders */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 20px;
  --radius-full: 999px;

  font-family: var(--body-font);
  font-size: 15px;
  line-height: 1.6;
  font-weight: 400;
  font-feature-settings: "rlig" 1, "calt" 1;
  font-variant-numeric: tabular-nums;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  color: var(--text-primary);
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
  :root {
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;

    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-gradient: linear-gradient(135deg, #0f172a 0%, #1a1f36 100%);

    --border-light: rgba(248, 250, 252, 0.08);
    --border-medium: rgba(248, 250, 252, 0.12);
    --border-dark: rgba(248, 250, 252, 0.2);
  }
}

/* Reset & Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html,
body {
  width: 100%;
  height: 100%;
}

body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  background: var(--bg-gradient);
  color: var(--text-primary);
}

#root {
  width: 100%;
  min-height: 100vh;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--display-font);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

p {
  margin: 0;
  line-height: 1.6;
}

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

a:hover {
  color: var(--accent-secondary);
}

/* Buttons */
button {
  font-family: var(--body-font);
  font-size: inherit;
  font-weight: 600;
}

/* Form Elements */
input,
textarea,
select {
  font-family: var(--body-font);
  font-size: inherit;
}

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

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--border-medium);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--border-dark);
}

/* Selection */
::selection {
  background: var(--accent-primary);
  color: white;
}

::-moz-selection {
  background: var(--accent-primary);
  color: white;
}