/* Modern CSS Reset & Variables */
:root {
  --primary: #1a1a1a;
  --primary-foreground: #f5f5f5;
  --accent: #6366f1;
  --accent-light: #818cf8;
  --text-muted: #64748b;
  --background: #ffffff;
  --surface: #f8fafc;
  --border: #e2e8f0;
  --radius: 0.5rem;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  
  --font-sans: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-serif: 'Playfair Display', serif;
  
  --container-width: 1200px;
  --header-height: 70px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  color: var(--primary);
  background-color: var(--background);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
}

h2 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
}

p {
  margin-bottom: 1rem;
  color: var(--text-muted);
}

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.2s;
}

ul {
  list-style: none;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 0.95rem;
  border: 1px solid transparent;
}

.btn-primary {
  background-color: var(--primary);
  color: var(--primary-foreground);
}

.btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.btn-outline {
  background-color: transparent;
  border-color: var(--border);
  color: var(--primary);
}

.btn-outline:hover {
  background-color: var(--surface);
  border-color: var(--primary);
}

.btn-secondary {
  background-color: var(--background);
  color: var(--primary);
  box-shadow: var(--shadow-md);
}

.btn-secondary:hover {
  box-shadow: var(--shadow-lg);
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 500;
  background-color: var(--surface);
  border: 1px solid var(--border);
}

.section {
  padding: 6rem 0;
}

.text-center { text-align: center; }
.text-gradient {
  background: linear-gradient(to right, var(--primary), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  z-index: 1000;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-links {
  display: flex;
  gap: 2rem;
}

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

.nav-link:hover, .nav-link.active {
  color: var(--primary);
}

/* Hero Section */
.hero {
  padding-top: calc(var(--header-height) + 2rem);
  min-height: 70vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: -1;
  background-image: url('hero-bg.png');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}


.hero-content {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(34, 197, 94, 0.1);
  color: #15803d;
  border: 1px solid rgba(34, 197, 94, 0.2);
  padding: 0.35rem 1rem;
  border-radius: 999px;
  font-size: 0.875rem;
  font-weight: 600;
  background-color: rgba(255, 255, 255, 0.8); /* Added background for better readability */
  backdrop-filter: blur(4px);
}

.ping-dot {
  position: relative;
  width: 8px;
  height: 8px;
}

.ping-dot::before {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  background-color: #22c55e;
  border-radius: 50%;
  opacity: 0.75;
  animation: ping 1.5s cubic-bezier(0, 0, 0.2, 1) infinite;
}

.ping-dot::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  background-color: #15803d;
  border-radius: 50%;
}

@keyframes ping {
  75%, 100% {
    transform: scale(2);
    opacity: 0;
  }
}

/* About Section */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 4rem;
  align-items: start;
}

.timeline {
  border-left: 2px solid rgba(0,0,0,0.1);
  padding-left: 2rem;
  position: relative;
  margin-top: 2rem;
}

.timeline-item {
  position: relative;
  margin-bottom: 2.5rem;
}

.timeline-dot {
  position: absolute;
  left: -2.6rem;
  top: 0.25rem;
  width: 1rem;
  height: 1rem;
  background: var(--primary);
  border-radius: 50%;
  border: 3px solid var(--background);
}

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

.card {
  background: var(--background);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.card-image {
  height: 200px;
  background-color: var(--surface);
  overflow: hidden;
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.card:hover .card-image img {
  transform: scale(1.05);
}

.card-content {
  padding: 1.5rem;
  flex-grow: 1;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.tag {
  background: var(--surface);
  padding: 0.25rem 0.75rem;
  border-radius: 4px;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.card-footer {
  padding: 1.5rem;
  border-top: 1px solid var(--border);
}

/* Skills Grid */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}

.skill-card {
  background: rgba(255,255,255,0.5);
  backdrop-filter: blur(5px);
  padding: 1.5rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.skill-list li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
  color: var(--text-muted);
}

.skill-dot {
  width: 6px;
  height: 6px;
  background: var(--primary);
  border-radius: 50%;
}

/* Resume Section */
.resume-section {
  background-color: var(--primary);
  color: var(--primary-foreground);
  position: relative;
  overflow: hidden;
}

.resume-section p {
  color: rgba(255,255,255,0.8);
}

/* Contact Form */
.contact-wrapper {
  max-width: 800px;
  margin: 0 auto;
}

.contact-card {
  background: var(--background);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.5rem;
  box-shadow: var(--shadow-sm);
}

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

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.form-input, .form-textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 1rem;
  transition: border-color 0.2s;
}

.form-input:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--primary);
}

.contact-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-top: 2rem;
  color: var(--text-muted);
}

.contact-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.contact-link:hover {
  color: var(--primary);
}

/* Mobile Responsive */
@media (max-width: 768px) {
  h1 { font-size: 2.5rem; }
  .nav-links { display: none; } /* Simple hide for mobile, could add hamburger if needed */
  .about-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .contact-links { flex-direction: column; align-items: center; gap: 1rem; }
}

/* Icons (SVG Placeholders) */
.icon {
  width: 1.25rem;
  height: 1.25rem;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  fill: none;
}