/* ===== CSS Variables ===== */
:root {
  --color-bg: #fafafa;
  --color-text: #1a1a1a;
  --color-text-muted: #666;
  --color-accent: #2a2a2a;
  --color-border: #e0e0e0;
  --color-card-bg: #fff;
  --color-nav-bg: #fff;

  --font-main: system-ui, -apple-system, sans-serif;
  --font-mono: "SF Mono", Consolas, monospace;

  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;

  --card-width: 300px;
  --card-image-height: 200px;
  --border-radius: 8px;

  --transition: 0.2s ease;
}

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

/* ===== Base ===== */
html {
  font-size: 16px;
}

body {
  font-family: var(--font-main);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}

/* ===== Navigation ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-nav-bg);
  border-bottom: 1px solid var(--color-border);
  z-index: 100;
}

.nav-link {
  padding: var(--space-xs) var(--space-sm);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: opacity var(--transition);
}

.nav-link:hover {
  opacity: 0.6;
}

.nav-link.active {
  border-bottom: 2px solid var(--color-accent);
}

/* ===== Main Content ===== */
.main {
  padding-top: 60px; /* nav height */
  min-height: 100vh;
}

/* ===== Views ===== */
.view {
  display: none;
  padding: var(--space-lg) var(--space-md);
  max-width: 1200px;
  margin: 0 auto;
}

.view.active {
  display: block;
}

.view-title {
  font-size: 1.5rem;
  font-weight: 400;
  margin-bottom: var(--space-md);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* ===== About View ===== */
.about-content {
  max-width: 600px;
  margin: var(--space-lg) auto;
  text-align: center;
}

.about-content h1 {
  font-size: 2.5rem;
  font-weight: 300;
  margin-bottom: var(--space-xs);
}

.tagline {
  color: var(--color-text-muted);
  font-size: 1.1rem;
  margin-bottom: var(--space-md);
}

.bio {
  text-align: left;
}

.bio p {
  margin-bottom: var(--space-sm);
}

/* ===== Dashboard / Project Grid ===== */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(var(--card-width), 1fr));
  gap: var(--space-md);
}

/* ===== Project Card ===== */
.project-card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.project-card-image {
  width: 100%;
  height: var(--card-image-height);
  object-fit: cover;
  background: var(--color-border);
}

.project-card-content {
  padding: var(--space-sm);
}

.project-card-title {
  font-size: 1.1rem;
  font-weight: 500;
  margin-bottom: var(--space-xs);
}

.project-card-description {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.project-card-tag {
  display: inline-block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.25em 0.75em;
  background: var(--color-bg);
  border-radius: 100px;
  color: var(--color-text-muted);
}

/* ===== Contact View ===== */
.contact-content {
  max-width: 500px;
  margin: var(--space-md) auto;
  text-align: center;
}

.contact-link {
  display: inline-block;
  margin-top: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-accent);
  border-radius: var(--border-radius);
  transition: background var(--transition), color var(--transition);
}

.contact-link:hover {
  background: var(--color-accent);
  color: var(--color-bg);
}

/* ===== Empty State ===== */
.empty-state {
  text-align: center;
  padding: var(--space-lg);
  color: var(--color-text-muted);
}

/* ===== Responsive ===== */
@media (max-width: 600px) {
  .nav {
    gap: var(--space-sm);
  }

  .nav-link {
    font-size: 0.8rem;
  }

  .about-content h1 {
    font-size: 2rem;
  }

  .view {
    padding: var(--space-md) var(--space-sm);
  }
}