:root {
  --primary: #222;
  --bg: #f9f9f9;
  --accent: #0077ff;
  --card-bg: #fff;
}

body.dark {
  --primary: #f1f1f1;
  --bg: #121212;
  --accent: #4ba3ff;
  --card-bg: #1f1f1f;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Segoe UI', Tahoma, sans-serif;
  background: var(--bg);
  color: var(--primary);
  line-height: 1.6;
  transition: background 0.3s, color 0.3s;
}

/* Logo layout */
.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  color: var(--primary);
}
.logo svg {
  width: 36px;
  height: 36px;
  flex: 0 0 auto;
}
.wordmark {
  display: inline-flex;
  align-items: baseline;
  gap: 0.15rem;
  font-weight: 700;
  letter-spacing: 0.3px;
  line-height: 1;
}
.wordmark .name { font-size: 1.15rem; }
.wordmark .dot  { color: var(--accent); }
.wordmark .role { font-size: 0.95rem; opacity: 0.8; }

/* Ensure header stays on top of cards */
header {
  position: sticky; /* or fixed/relative depending on your layout */
  top: 0;
  background: var(--card-bg);
  z-index: 1000;
}


header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background: var(--card-bg);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
  position: sticky;
  z-index: 1000;
  top: 0;
}

header h1 {
  margin: 0;
  font-size: 1.3rem;
}

nav a {
  margin-left: 1rem;
  text-decoration: none;
  color: var(--primary);
  font-weight: 500;
}

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

#themeToggle {
  margin-left: 1rem;
  padding: 0.4rem 0.6rem;
  font-size: 1rem;
  cursor: pointer;
  background: transparent;
  border: 1px solid var(--primary);
  border-radius: 5px;
  color: var(--primary);
  transition: background 0.3s, color 0.3s;
}

#themeToggle:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.hero {
  padding: 4rem 2rem;
  text-align: center;
}

.hero h2 {
  font-size: 2.2rem;
  margin-bottom: 0.5rem;
}

.hero p { color: #555; }

.projects {
  padding: 3rem 2rem;
  max-width: 1100px;
  margin: auto;
}

.projects h3 {
  text-align: center;
  margin-bottom: 2rem;
  font-size: 1.8rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr); /* fixed 3 columns on wide screens */
  gap: 1.5rem;
}

@media (max-width: 900px) {
  .grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .grid { grid-template-columns: 1fr; }
}

/* card anchor */
.card {
  text-decoration: none;
  color: inherit;
  display: block;
  background: var(--card-bg);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.08);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  position: relative;
}

.card:hover {
  transform: translateY(-6px) scale(1.02);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.12);
}

.card-image { position: relative; }

.card img {
  width: 100%;
  display: block;
  transition: filter 0.3s;
}

.overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  opacity: 0;
  transition: opacity 0.3s;
}

.card:hover img { filter: brightness(0.8); }
.card:hover .overlay { opacity: 1; }

.card-body {
  padding: 1rem;
}

.card-body h4 {
  margin: 0 0 0.5rem;
  font-size: 1.2rem;
}

.card-body p {
  margin: 0;
  color: #666;
}

.contact {
  padding: 3rem 2rem;
  text-align: center;
}

footer {
  text-align: center;
  padding: 1.5rem;
  font-size: 0.85rem;
  color: #777;
}

html { scroll-behavior: smooth; }

#projects {
  padding: 3rem 1rem;
}

#projects h2 {
  text-align: center;
  font-size: 1.8rem;
  margin-bottom: 2rem;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
}

.projects-grid a {
  display: block;
  text-align: center;
  padding: 1rem;
  border: 1px solid #ddd;
  border-radius: 6px;
  text-decoration: none;
  color: #333;
  background: #fafafa;
  transition: background 0.3s, transform 0.3s;
}

.projects-grid a:hover {
  background: #f0f0f0;
  transform: translateY(-3px);
}