/* Modern Cybersecurity Portfolio - Richard Hidayat */
:root {
  --primary-bg: #0a0e1a;
  --secondary-bg: #111827;
  --accent-bg: #1f2937;
  --surface: #374151;
  
  --primary-text: #f9fafb;
  --secondary-text: #d1d5db;
  --muted-text: #9ca3af;
  
  --accent-primary: #ffed00;
  --accent-secondary: #fff200;
  --accent-tertiary: #fff700;
  
  --border-subtle: #374151;
  --border-emphasis: #4b5563;
  
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  
  --shadow-soft: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-medium: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-strong: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

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

/* Grain Texture Overlay */
.grain-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0.03;
  z-index: -1;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
  pointer-events: none;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(10, 14, 26, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
  z-index: 1000;
  transition: var(--transition-smooth);
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
}

.nav-brand {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--accent-primary);
  text-decoration: none;
}

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

.nav-link {
  color: var(--secondary-text);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  transition: var(--transition-fast);
  position: relative;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -4px;
  left: 0;
  background: var(--accent-primary);
  transition: var(--transition-fast);
}

.nav-link:hover::after {
  width: 100%;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 6rem 0 4rem;
  background: linear-gradient(135deg, var(--primary-bg) 0%, var(--secondary-bg) 100%);
  position: relative;
  overflow: hidden;
}

.hero .container {
  display: flex;
  align-items: center;
  gap: 4rem;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 20% 20%, rgba(255, 237, 0, 0.1) 0%, transparent 50%),
              radial-gradient(circle at 80% 80%, rgba(255, 242, 0, 0.08) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  flex: 1;
  max-width: 700px;
  z-index: 2;
  position: relative;
}

.hero-badge {
  display: inline-block;
  background: rgba(255, 237, 0, 0.1);
  color: var(--accent-primary);
  padding: 0.5rem 1rem;
  border-radius: 2rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  border: 1px solid rgba(255, 237, 0, 0.2);
  margin-bottom: 2rem;
  animation: fadeInUp 0.8s ease-out;
}

.hero-title {
  margin-bottom: 2rem;
}

.hero-name {
  display: block;
  font-size: clamp(2rem, 6vw, 3.5rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--primary-text);
  margin-bottom: 1rem;
  animation: fadeInUp 0.8s ease-out 0.2s both;
  white-space: nowrap;
}

.hero-subtitle {
  display: block;
  font-size: clamp(1.1rem, 3vw, 1.25rem);
  font-weight: 400;
  color: var(--secondary-text);
  line-height: 1.4;
  animation: fadeInUp 0.8s ease-out 0.4s both;
}

.hero-location {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--muted-text);
  font-size: 0.95rem;
  animation: fadeInUp 0.8s ease-out 0.6s both;
}

.location-dot {
  width: 8px;
  height: 8px;
  background: var(--accent-primary);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

.hero-visual {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 2;
  position: relative;
}

.security-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  max-width: 400px;
  animation: fadeInUp 0.8s ease-out 0.8s both;
}

.grid-item {
  background: var(--accent-bg);
  border: 1px solid var(--border-subtle);
  border-radius: 0.75rem;
  padding: 1.5rem;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--secondary-text);
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.grid-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-primary), transparent);
  opacity: 0;
  transition: var(--transition-smooth);
}

.grid-item:hover {
  border-color: var(--accent-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-medium);
}

.grid-item:hover::before {
  opacity: 1;
}

/* Section Styles */
.section-title {
  font-size: clamp(2rem, 5vw, 2.5rem);
  font-weight: 700;
  color: var(--primary-text);
  margin-bottom: 1rem;
  position: relative;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -0.5rem;
  left: 50%;
  transform: translateX(-50%);
  width: 3rem;
  height: 3px;
  background: var(--accent-primary);
  border-radius: 2px;
}

.section-subtitle {
  color: var(--secondary-text);
  font-size: 1.1rem;
  margin-bottom: 3rem;
}

/* About Section */
.about {
  padding: 6rem 0;
  background: var(--secondary-bg);
  text-align: center;
}

.about .section-title {
  margin-bottom: 3rem;
}

.about-content {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 3rem;
  text-align: left;
}

.about-photo {
  flex-shrink: 0;
}

.profile-photo {
  width: 280px;
  height: 280px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--accent-primary);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  transition: var(--transition-smooth);
  user-select: none;
  -webkit-user-drag: none;
  -khtml-user-drag: none;
  -moz-user-drag: none;
  -o-user-drag: none;
  user-drag: none;
  pointer-events: auto;
}

.profile-photo:hover {
  transform: scale(1.05);
  box-shadow: 0 15px 40px rgba(255, 237, 0, 0.2);
}

.about-text {
  flex: 1;
}

.about-text p {
  font-size: 1.1rem;
  color: var(--secondary-text);
  margin-bottom: 2rem;
  line-height: 1.7;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}

.skill-item {
  background: var(--accent-bg);
  border: 1px solid var(--border-subtle);
  border-radius: 0.5rem;
  padding: 1rem;
  text-align: center;
  font-weight: 500;
  color: var(--primary-text);
  transition: var(--transition-smooth);
}

.skill-item:hover {
  border-color: var(--accent-primary);
  transform: translateY(-2px);
}

/* Projects Section */
.projects {
  padding: 6rem 0;
  background: var(--primary-bg);
}

.projects-header {
  text-align: center;
  margin-bottom: 4rem;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
}

.project-card {
  background: var(--accent-bg);
  border: 1px solid var(--border-subtle);
  border-radius: 1rem;
  overflow: hidden;
  transition: var(--transition-smooth);
  position: relative;
  group: hover;
}

.project-card:hover {
  border-color: var(--accent-primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-strong);
}

.project-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background: var(--surface);
  transition: var(--transition-smooth);
}

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

.project-content {
  padding: 1.5rem;
}

.project-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--primary-text);
  margin-bottom: 0.5rem;
  line-height: 1.3;
}

.project-description {
  color: var(--secondary-text);
  font-size: 0.95rem;
  margin-bottom: 1rem;
  line-height: 1.5;
}

.project-btn {
  background: var(--accent-primary);
  color: var(--primary-bg);
  border: none;
  border-radius: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition-fast);
  text-decoration: none;
  display: inline-block;
}

.project-btn:hover {
  background: var(--accent-secondary);
  transform: translateY(-1px);
}

/* Contact Section */
.contact {
  padding: 6rem 0;
  background: var(--secondary-bg);
  text-align: center;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  max-width: 800px;
  margin: 0 auto;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.5rem;
  background: var(--accent-bg);
  border: 1px solid var(--border-subtle);
  border-radius: 0.75rem;
  transition: var(--transition-smooth);
}

.contact-item:hover {
  border-color: var(--accent-primary);
  transform: translateY(-2px);
}

.contact-icon {
  font-size: 1.5rem;
}

.contact-info {
  display: flex;
  flex-direction: column;
}

.contact-label {
  font-size: 0.85rem;
  color: var(--muted-text);
  margin-bottom: 0.25rem;
}

.contact-info a {
  color: var(--primary-text);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition-fast);
}

.contact-info a:hover {
  color: var(--accent-primary);
}

/* Footer */
.footer {
  padding: 2rem 0;
  background: var(--primary-bg);
  border-top: 1px solid var(--border-subtle);
  text-align: center;
}

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

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.5;
    transform: scale(1.1);
  }
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav {
    padding: 1rem;
  }
  
  .nav-links {
    gap: 1rem;
  }
  
  .hero .container {
    flex-direction: column;
    text-align: center;
    gap: 2rem;
  }
  
  .hero {
    padding: 4rem 0 2rem;
  }
  
  .hero-visual {
    margin-top: 2rem;
  }
  
  .security-grid {
    grid-template-columns: 1fr 1fr;
    max-width: 300px;
    gap: 0.75rem;
  }
  
  .grid-item {
    padding: 1rem 0.75rem;
    font-size: 0.8rem;
  }
  
  .container {
    padding: 0 1rem;
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .about {
    padding: 4rem 0;
  }
  
  .about-content {
    flex-direction: column;
    text-align: center;
    gap: 2rem;
  }
  
  .profile-photo {
    width: 200px;
    height: 200px;
  }
  
  .projects {
    padding: 4rem 0;
  }
  
  .contact {
    padding: 4rem 0;
  }
}

@media (max-width: 480px) {
  .hero-badge {
    font-size: 0.8rem;
    padding: 0.4rem 0.8rem;
  }
  
  .hero-name {
    font-size: clamp(1.8rem, 8vw, 2.5rem);
  }
  
  .hero-subtitle {
    font-size: clamp(1rem, 4vw, 1.1rem);
  }
  
  .security-grid {
    grid-template-columns: 1fr;
    max-width: 250px;
  }
  
  .grid-item {
    padding: 1rem;
    font-size: 0.8rem;
  }
  
  .project-content {
    padding: 1rem;
  }
  
  .contact-item {
    padding: 1rem;
    flex-direction: column;
    text-align: center;
    gap: 0.75rem;
  }
  
  .contact-icon {
    font-size: 2rem;
  }
  
  .section-title {
    font-size: clamp(1.75rem, 6vw, 2rem);
  }
  
  .nav-links {
    gap: 0.75rem;
  }
  
  .nav-link {
    font-size: 0.85rem;
  }
}