/* ASPnix Design System — matches www.aspnix.com */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

:root {
  /* Fonts */
  --font-sans: 'Inter', 'Inter Fallback', system-ui, -apple-system, sans-serif;
  --font-mono: ui-monospace, 'SF Mono', monospace;

  /* Font sizes */
  --font-size-xs: 0.8125rem;
  --font-size-sm: 0.9375rem;
  --font-size-base: 1.0625rem;
  --font-size-lg: 1.1875rem;
  --font-size-xl: 1.3125rem;
  --font-size-2xl: 1.625rem;
  --font-size-3xl: 2.125rem;
  --font-size-4xl: 2.625rem;
  --font-size-5xl: 3.625rem;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  --spacing-4xl: 6rem;
  --spacing-5xl: 8rem;

  /* Layout */
  --max-width: 720px;
  --wide-width: 1200px;

  /* Border radius */
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;

  /* Light mode colors (default) */
  --color-bg: #fdfbf7;
  --color-text: #1a1a2e;
  --color-muted: #6b7280;
  --color-border: #e5e1d8;
  --color-surface: #f5f2ec;
  --color-primary: #0ea5e9;
  --color-primary-dark: #0284c7;
  --color-primary-light: #38bdf8;
  --color-accent: #06b6d4;
  --color-accent-light: #67e8f9;
  --color-success: #22c55e;
  --color-warning: #f59e0b;
  --color-danger: #ef4444;
}

html.dark {
  --color-bg: #09090b;
  --color-text: #fafafa;
  --color-muted: #a1a1aa;
  --color-border: #1a1a1e;
  --color-surface: #111113;
  --color-primary: #38bdf8;
  --color-primary-dark: #0ea5e9;
  --color-primary-light: #7dd3fc;
}

/* Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  font-size: var(--font-size-base);
}

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

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

/* Logo theme switching */
.logo-light { display: block; }
.logo-dark { display: none; }
html.dark .logo-light { display: none; }
html.dark .logo-dark { display: block; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  font-family: inherit;
  font-size: var(--font-size-sm);
  font-weight: 600;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
  border: none;
}

.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  color: white;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  box-shadow: 0 2px 8px color-mix(in srgb, var(--color-primary) 30%, transparent);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
  box-shadow: 0 4px 16px color-mix(in srgb, var(--color-primary) 40%, transparent);
}

.btn-secondary {
  color: var(--color-text);
  background: transparent;
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background: var(--color-surface);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

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

.btn-danger:hover {
  background: #dc2626;
}

.btn-sm {
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: var(--font-size-xs);
}

.btn-lg {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: var(--font-size-base);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 { font-size: var(--font-size-5xl); font-weight: 800; }
h2 { font-size: var(--font-size-3xl); font-weight: 700; }
h3 { font-size: var(--font-size-2xl); font-weight: 700; }
h4 { font-size: var(--font-size-xl); font-weight: 700; }