/* Base reset */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
  background-color: var(--bg);
  transition: background-color 0.3s, color 0.3s;
}

/* Light / Dark theme vars */
:root {
  --bg: #f9fafc;
  --text: #111827;
  --accent: #2563eb;
  --card-bg: #ffffff;
  --card-border: #e5e7eb;
  --code-bg: #f3f4f6;
  --terminal-bg: #1f2937;
  --terminal-text: #f9fafc;
}

[data-theme="dark"] {
  --bg: #0f172a;
  --text: #f1f5f9;
  --accent: #60a5fa;
  --card-bg: #1e293b;
  --card-border: #334155;
  --code-bg: #334155;
  --terminal-bg: #0f172a;
  --terminal-text: #e2e8f0;
}

/* Layout */
.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 1.5rem 3rem 1.5rem;
}

/* Header & Nav */
.header {
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--card-border);
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--accent);
}

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

.nav-links li {
  margin-left: 1.5rem;
}

.nav-links a {
  color: var(--text);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--accent);
}

/* Hero section */
.hero {
  margin: 3rem 0 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--card-border);
}

.hero-title {
  font-size: 1.4rem;
  line-height: 1.3;
  margin-bottom: 0.5rem;
  color: var(--accent);
}

.hero-subtitle {
  font-size: 0.95rem;
  margin-bottom: 0.75rem;
  color: var(--text);
}

.hero-links {
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

.hero-links a {
  color: var(--accent);
  text-decoration: none;
}

.hero-links a:hover {
  text-decoration: underline;
}

.hero-btns {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 0.5rem 1rem;
  border-radius: 0.375rem;
  background-color: var(--accent);
  color: white;
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: opacity 0.2s;
}

.btn:hover {
  opacity: 0.9;
}

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

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

/* Sections */
.section {
  margin: 3rem 0;
}

.section-title {
  margin-bottom: 1rem;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--accent);
}

/* Card */
.card {
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 0.5rem;
  padding: 1rem;
}

.card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  color: var(--accent);
}

.card-meta {
  font-size: 0.9rem;
  color: var(--text);
  margin-bottom: 0.75rem;
}

.card ul {
  margin: 0.75rem 0;
}

.card li {
  margin-bottom: 0.4rem;
}

/* Contact / terminal */
.contact-terminal {
  margin-top: 1rem;
  border: 1px solid var(--card-border);
  border-radius: 0.5rem;
  overflow: hidden;
}

.terminal-header {
  padding: 0.5rem 1rem;
  background-color: var(--terminal-bg);
  color: var(--terminal-text);
  font-size: 0.9rem;
  font-weight: 500;
}

.terminal-body {
  padding: 0.75rem 1rem;
  background-color: var(--terminal-bg);
  color: var(--terminal-text);
  font-family: "Monaco", "Courier New", monospace;
  font-size: 0.9rem;
  line-height: 1.6;
}

.terminal-line {
  margin: 0.4rem 0;
}

/* Footer */
.footer {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--card-border);
  text-align: center;
  font-size: 0.9rem;
  color: var(--text);
}

/* Theme toggle button */
.theme-toggle {
  background: none;
  border: 1px solid var(--card-border);
  border-radius: 0.375rem;
  padding: 0.35rem 0.5rem;
  color: var(--text);
  font-size: 0.95rem;
  cursor: pointer;
  transition: background-color 0.2s, color 0.2s;
}

.theme-toggle:hover {
  background-color: var(--card-bg);
}

/* Responsive */
@media (max-width: 768px) {
  .nav {
    flex-direction: column;
    gap: 1rem;
  }

  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
    padding-top: 0.5rem;
  }

  .nav-links li {
    margin: 0 0.75rem 0.5rem 0;
  }

  .hero-title {
    font-size: 1.25rem;
  }

  .hero-btns {
    flex-direction: column;
  }
}