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

:root {
  --color-bg: #1c1c1c;
  --color-surface: #2a2a2a;
  --color-text: #e0e0e0;
  --color-primary: #569cd6;
  --color-accent: #d7ba7d;
  --color-danger: #d16969;
  --color-success: #4ec9b0;

  --font-sans: "Inter", "IBM Plex Sans", system-ui, sans-serif;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 3rem;
  --radius: 2px;
}

html {
  font-size: 100%;
}

body {
  font-family: var(--font-sans);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
}

/* ------------------------------------------
   Layout Containers
------------------------------------------- */
.container {
  width: 90%;
  max-width: 960px;
  margin: 0 auto;
  padding: var(--space-md) 0;
}

/* ------------------------------------------
   Header & Nav
------------------------------------------- */
.site-header {
  background-color: var(--color-surface);
  border-bottom: 1px solid #3f3f3f;
}

.site-header .container {
  display: flex;
  justify-content: center;
  align-items: center;
}

.logo a {
  color: var(--color-primary);
  text-decoration: none;
  font-size: 1.5rem;
  font-weight: bold;
}

.main-nav ul {
  list-style: none;
  display: flex;
}

.main-nav li + li {
  margin-left: var(--space-md);
}

.main-nav a {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
}

.main-nav a:hover,
.main-nav a:focus {
  color: var(--color-primary);
}

/* ------------------------------------------
   Hero Section
------------------------------------------- */
.hero {
  background-color: var(--color-surface);
  text-align: center;
  padding: var(--space-lg) 0;
}

.hero h2 {
  font-size: 2.25rem;
  margin-bottom: var(--space-sm);
}

.hero p {
  font-size: 1.125rem;
  color: #b0b0b0;
}

/* ------------------------------------------
   Footer
------------------------------------------- */
.site-footer {
  background-color: var(--color-surface);
  border-top: 1px solid #3f3f3f;
  color: #aaa;
  text-align: center;
  padding: var(--space-sm) 0;
  font-size: 0.875rem;
}

.site-footer a {
  color: var(--color-accent);
  text-decoration: none;
}

.site-footer a:hover {
  text-decoration: underline;
}

/* ------------------------------------------
   Responsive
------------------------------------------- */
@media (max-width: 768px) {
  .main-nav ul {
    flex-direction: column;
    align-items: flex-start;
  }

  .main-nav li + li {
    margin-left: 0;
    margin-top: var(--space-xs);
  }
}