:root {
  --bg-color: #0f172a;
  --bg-secondary: #1e293b;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --accent-color: #38bdf8;
  --accent-hover: #0ea5e9;
  --border-color: #334155;
  --font-main: "Inter", sans-serif;
  --container-width: 1200px;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
}

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

body {
  font-family: var(--font-main);
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.3s ease;
}

ul {
  list-style: none;
}

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */
.header {
  padding: 1.5rem 0;
  position: fixed;
  width: 100%;
  top: 0;
  background-color: rgba(15, 23, 42, 0.9);
  backdrop-filter: blur(10px);
  z-index: 1000;
  border-bottom: 1px solid var(--border-color);
}

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

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-img {
  height: 40px;
  width: 40px;
  border-radius: 50%;
  object-fit: cover;
  background-color: white; /* Ensure logo is visible on dark background */
  padding: 2px; /* Optional: adds a small white border/spacing */
}
.logo .highlight {
  color: var(--accent-color);
}

.nav ul {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
}

.nav a:hover {
  color: var(--text-primary);
}

.btn-nav {
  background-color: var(--bg-secondary);
  padding: 0.5rem 1rem;
  border-radius: 6px;
  border: 1px solid var(--border-color);
}

.btn-nav:hover {
  border-color: var(--accent-color);
  color: var(--accent-color) !important;
}

/* Hero Section */
.hero {
  padding: 10rem 0 6rem;
  text-align: center;
}

.hero-title {
  font-size: 3.5rem;
  line-height: 1.1;
  font-weight: 800;
  margin-bottom: 1.5rem;
  background: linear-gradient(to right, #fff, #94a3b8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 2.5rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: 6px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
}

.btn-primary {
  background-color: var(--accent-color);
  color: #0f172a;
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  transform: translateY(-2px);
}

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

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

/* Sections */
.section {
  padding: 6rem 0;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 3rem;
  text-align: center;
}

/* Expertise Grid */
.grid-4 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.card {
  background-color: var(--bg-secondary);
  padding: 2rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  transition: transform 0.3s ease;
}

.card:hover {
  transform: translateY(-5px);
  border-color: var(--accent-color);
}

.card .icon {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.card h3 {
  margin-bottom: 0.5rem;
  font-size: 1.25rem;
}

.card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Projects Grid */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.project-card {
  background-color: var(--bg-secondary);
  padding: 2rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.project-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--accent-color);
}

.project-card p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.link-arrow {
  color: var(--text-primary);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
}

.link-arrow:hover {
  color: var(--accent-color);
  gap: 5px;
}

/* Tech Stack */
.tech-stack {
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  background-color: rgba(30, 41, 59, 0.5);
}

.tech-logos {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 3rem;
  align-items: center;
}

.tech-item {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-secondary);
  opacity: 0.7;
  transition: opacity 0.3s ease;
}

.tech-item:hover {
  opacity: 1;
  color: var(--text-primary);
}

/* Contact Section */
.contact-form {
  max-width: 600px;
  margin: 0 auto;
  background-color: var(--bg-secondary);
  padding: 2.5rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
  font-weight: 500;
  font-size: 0.95rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  background-color: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-primary);
  font-family: var(--font-main);
  font-size: 1rem;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.2);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-secondary);
  opacity: 0.5;
}

.contact-form button {
  width: 100%;
  border: none;
  font-size: 1rem;
  margin-top: 0.5rem;
}

/* Honeypot - Hidden from real users */
.honeypot {
  opacity: 0;
  position: absolute;
  top: 0;
  left: 0;
  height: 0;
  width: 0;
  z-index: -1;
}

/* Footer */
.footer {
  padding: 4rem 0 2rem;
  background-color: var(--bg-color);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 3rem;
}

.footer-brand h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-links a {
  color: var(--text-secondary);
}

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

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 768px) {
  .hero-title {
    font-size: 2.5rem;
  }

  .nav {
    display: none; /* Simple hide for now, script can toggle */
  }

  .grid-4,
  .grid-3 {
    grid-template-columns: 1fr;
  }

  .footer-content {
    flex-direction: column;
    text-align: center;
    gap: 2rem;
  }
}