/* ARHIP LAB - Neon Futurism Design System */
:root {
  --bg-dark: #090a0f;
  --bg-card: rgba(18, 19, 31, 0.75);
  --bg-card-hover: rgba(28, 30, 49, 0.85);
  --border-color: rgba(139, 92, 246, 0.25);
  --border-glow: rgba(168, 85, 247, 0.6);
  
  --primary: #8b5cf6;
  --primary-light: #a855f7;
  --primary-glow: rgba(168, 85, 247, 0.4);
  
  --cyan: #06b6d4;
  --cyan-light: #38bdf8;
  --cyan-glow: rgba(6, 182, 212, 0.4);
  
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --text-accent: #c084fc;
  
  --font-family: 'Inter', system-ui, -apple-system, sans-serif;
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: var(--font-family);
  user-select: none;
}

html {
  scroll-behavior: smooth;
  color-scheme: dark;
}

body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* Background Canvas */
#bg-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-dark);
}
::-webkit-scrollbar-thumb {
  background: var(--primary);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--primary-light);
}

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

/* Glassmorphism Panel Utility */
.glass-panel {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  transition: var(--transition-normal);
}

.glass-panel:hover {
  border-color: var(--border-glow);
  box-shadow: 0 10px 40px 0 var(--primary-glow);
  transform: translateY(-4px);
}

/* Navigation Bar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  padding: 1.25rem 0;
  background: rgba(9, 10, 15, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
}

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

.logo-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-main);
  font-weight: 800;
  font-size: 1.5rem;
  letter-spacing: 1px;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary), var(--cyan));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 15px var(--primary-glow);
}

.logo-text {
  background: linear-gradient(90deg, #ffffff, var(--text-accent), var(--cyan-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: var(--transition-fast);
  position: relative;
}

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

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

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

/* Hero Section */
.hero {
  padding-top: 180px;
  padding-bottom: 100px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 18px;
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid var(--cyan);
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--cyan-light);
  margin-bottom: 1.5rem;
  box-shadow: 0 0 20px var(--cyan-glow);
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background: #10b981;
  border-radius: 50%;
  box-shadow: 0 0 10px #10b981;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 10px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.hero-title {
  font-size: 4rem;
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  letter-spacing: -1px;
}

.hero-gradient-text {
  background: linear-gradient(135deg, #ffffff 0%, var(--primary-light) 50%, var(--cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-quote {
  font-size: 1.25rem;
  color: var(--text-muted);
  max-width: 750px;
  line-height: 1.6;
  margin-bottom: 2.5rem;
}

.hero-buttons {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
  justify-content: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition-normal);
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  box-shadow: 0 4px 25px var(--primary-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 35px var(--primary-glow);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--cyan);
  color: var(--cyan-light);
}

/* Stats Counter Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 4rem;
  width: 100%;
}

.stat-card {
  padding: 2rem;
  text-align: center;
}

.stat-number {
  font-size: 2.75rem;
  font-weight: 900;
  color: var(--cyan-light);
  margin-bottom: 0.5rem;
  text-shadow: 0 0 15px var(--cyan-glow);
}

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

/* Section Common Styling */
.section {
  padding: 100px 0;
}

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

.section-tag {
  color: var(--cyan);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 0.5rem;
  display: block;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text-main);
}

/* Tech Stack Grid */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.skill-card {
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.skill-header {
  display: flex;
  align-items: center;
  gap: 14px;
}

.skill-icon-box {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(139, 92, 246, 0.15);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-light);
}

.skill-title {
  font-size: 1.15rem;
  font-weight: 700;
}

.skill-level {
  font-size: 0.85rem;
  color: var(--cyan-light);
  font-weight: 600;
}

.skill-desc {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.5;
}

/* Project Cases Section */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 2rem;
}

.project-card {
  padding: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.project-tag {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(168, 85, 247, 0.15);
  border: 1px solid var(--primary);
  border-radius: 6px;
  font-size: 0.75rem;
  color: var(--primary-light);
  font-weight: 600;
  margin-bottom: 1rem;
  width: fit-content;
}

.project-title {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
}

.project-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.project-techs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.tech-badge {
  padding: 4px 10px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 6px;
  font-size: 0.8rem;
  color: var(--text-muted);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* About / Credentials Section */
.about-box {
  padding: 3rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.about-text p {
  color: var(--text-muted);
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

.credentials-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.credential-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 18px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.credential-icon {
  color: #10b981;
}

/* Contact Section */
.contact-section {
  text-align: center;
}

.contact-card {
  padding: 3.5rem 2rem;
  max-width: 800px;
  margin: 0 auto;
}

.contact-options {
  display: flex;
  gap: 1.25rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 2.5rem;
}

/* Easter Egg Modal & FX */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(10px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition-normal);
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: all;
}

.modal-content {
  background: var(--bg-dark);
  border: 1px solid var(--cyan);
  box-shadow: 0 0 50px var(--cyan-glow);
  padding: 2.5rem;
  border-radius: 20px;
  max-width: 500px;
  width: 90%;
  position: relative;
  text-align: center;
}

.close-modal {
  position: absolute;
  top: 15px;
  right: 20px;
  font-size: 1.5rem;
  color: var(--text-muted);
  cursor: pointer;
}

.close-modal:hover {
  color: var(--cyan);
}

/* Toast Notifications */
.toast {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: rgba(16, 185, 129, 0.95);
  color: #fff;
  padding: 14px 24px;
  border-radius: 12px;
  font-weight: 600;
  box-shadow: 0 5px 25px rgba(16, 185, 129, 0.4);
  transform: translateY(100px);
  opacity: 0;
  transition: var(--transition-normal);
  z-index: 2000;
  display: flex;
  align-items: center;
  gap: 10px;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

/* Back to top button */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-fast);
  opacity: 0;
  visibility: hidden;
  z-index: 90;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  border-color: var(--cyan);
  color: var(--cyan-light);
  box-shadow: 0 0 20px var(--cyan-glow);
  transform: translateY(-3px);
}

/* Footer */
footer {
  padding: 2.5rem 0;
  border-top: 1px solid var(--border-color);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Matrix Mode Class */
body.matrix-mode {
  --primary: #10b981;
  --primary-light: #34d399;
  --primary-glow: rgba(16, 185, 129, 0.5);
  --cyan: #059669;
  --cyan-light: #6ee7b7;
  --cyan-glow: rgba(5, 150, 105, 0.5);
  --border-color: rgba(16, 185, 129, 0.3);
}

/* Responsive adjustments */
@media (max-width: 900px) {
  .hero-title { font-size: 2.75rem; }
  .about-box { grid-template-columns: 1fr; gap: 2rem; }
  .stats-grid { grid-template-columns: 1fr; }
  .nav-links { display: none; }
}