/* =============================================================
   Global Styles
   ============================================================= */

:root {
  --clr-bg: #0D0D0F;         /* Dark background */
  --clr-surface: #151618;    /* Slightly lighter surface */
  --clr-text: #E0E0E0;       /* Main text color */
  --clr-accent: #3EE8B5;     /* Vibrant accent (green/cyan) */
  --clr-accent-alt: #1EA1FF; /* Secondary accent */

  --font-body: 'Inter', sans-serif;
  --font-heading: 'JetBrains Mono', monospace;

  --transition-fast: 0.2s ease-in-out;
}

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

html {
  scroll-behavior: smooth;
}

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

.container {
  width: min(90%, 1100px);
  margin-inline: auto;
}

.section {
  padding-block: 5rem;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 2rem;
  color: var(--clr-accent);
  margin-bottom: 2rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* =============================================================
   Navbar / Hero
   ============================================================= */

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 2rem;
  background: rgba(13, 13, 15, 0.8);
  backdrop-filter: blur(8px);
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 1000;
}

.logo {
  font-family: var(--font-heading);
  color: var(--clr-accent);
  font-size: 1.3rem;
  text-decoration: none;
  transition: transform var(--transition-fast);
}

.logo:hover {
  transform: scale(1.1);
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 1.5rem;
}

.nav-links li a {
  color: var(--clr-text);
  text-decoration: none;
  transition: color var(--transition-fast);
  font-weight: 500;
}

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

.hero {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  text-align: center;
  background: url('../assets/hero-bg.svg') center/cover, var(--clr-bg);
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 6vw, 4rem);
  margin-bottom: 1rem;
}

.hero-subtitle {
  font-size: 1.1rem;
  margin-bottom: 2rem;
  max-width: 35ch;
  margin-inline: auto;
}

.accent {
  color: var(--clr-accent);
}

.btn {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 4px;
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--transition-fast), background-color var(--transition-fast);
  text-decoration: none;
  display: inline-block;
}

.primary-btn {
  background-color: var(--clr-accent);
  color: #0D0D0F;
}

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

.secondary-btn {
  background-color: transparent;
  border: 2px solid var(--clr-accent);
  color: var(--clr-accent);
}

.secondary-btn:hover {
  background-color: var(--clr-accent);
  color: #0D0D0F;
}

.disabled-btn {
  opacity: 0.5;
  pointer-events: none;
  border: 2px dashed var(--clr-text);
}

/* =============================================================
   About
   ============================================================= */

.about p {
  max-width: 60ch;
}

/* =============================================================
   Skills
   ============================================================= */

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
}

.skill-item {
  background-color: var(--clr-surface);
  padding: 1rem;
  border-radius: 6px;
  text-align: center;
  font-family: var(--font-heading);
  transition: transform var(--transition-fast);
}

.skill-item:hover {
  transform: translateY(-3px);
}

/* =============================================================
   Projects
   ============================================================= */

.project-card {
  background-color: var(--clr-surface);
  padding: 2rem;
  border-radius: 8px;
  margin-bottom: 2rem;
  position: relative;
  transition: transform var(--transition-fast);
}

.project-card:hover {
  transform: translateY(-4px);
}

.project-title {
  font-family: var(--font-heading);
  margin-bottom: 0.5rem;
  color: var(--clr-accent);
}

.project-description {
  margin-bottom: 1rem;
}

/* =============================================================
   Experience (Timeline)
   ============================================================= */

.timeline-item {
  border-left: 3px solid var(--clr-accent);
  padding-left: 1.5rem;
  margin-bottom: 2rem;
}

.timeline-date {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  color: var(--clr-accent-alt);
}

/* =============================================================
   Contact
   ============================================================= */

.contact-links {
  display: flex;
  gap: 1rem;
}

.contact-link {
  color: var(--clr-accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-fast);
}

.contact-link:hover {
  border-color: var(--clr-accent);
}

/* =============================================================
   Footer
   ============================================================= */

.footer {
  text-align: center;
  padding: 1.5rem 0;
  background-color: #0B0B0D;
}

/* =============================================================
   Media Queries
   ============================================================= */

@media (max-width: 768px) {
  .nav-links {
    display: none; /* For simplicity; could add burger menu later */
  }
}