/* ==========================================================================
   Tab1 CSS Style Sheet - Premium Glassmorphism & Structured 3D Portfolio
   ========================================================================== */

/* 1. Global Reset & Variables */
:root {
  --font-heading: 'Space Grotesk', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* Color Palette */
  --bg-primary: #050B14;
  --bg-secondary: #0A1424;
  --color-charcoal: #121824;
  --color-charcoal-light: #1A2333;
  --color-cyan: #00F2FE;
  --color-cyan-glow: rgba(0, 242, 254, 0.35);
  --color-cyan-dim: #00B4D8;
  --color-text-primary: #F3F4F6;
  --color-text-secondary: #9CA3AF;
  --color-text-dim: #6B7280;

  /* Glassmorphism settings */
  --glass-bg: rgba(10, 20, 36, 0.55);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-border-hover: rgba(0, 242, 254, 0.3);
  --glass-shadow: rgba(0, 0, 0, 0.4);
  --glass-blur: 16px;

  /* UI Spacing */
  --nav-height: 80px;
  --border-radius: 12px;
  --transition-speed: 0.3s;
}

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

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

/* 2. 3D Canvas Background & Backdrops */
#canvas-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 1;
  pointer-events: none; /* Passes clicks through to HTML elements */
}

/* Ambient Backdrops */
.bg-glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(140px);
  z-index: 0;
  pointer-events: none;
  opacity: 0.25;
  transition: all 1.5s ease-in-out;
}

.bg-glow-1 {
  top: -10%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--color-cyan) 0%, transparent 70%);
}

.bg-glow-2 {
  bottom: -10%;
  left: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, #0F3BA0 0%, transparent 70%);
}

/* 3. Navigation Bar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  z-index: 100;
  background: rgba(5, 11, 20, 0.4);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-bottom: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  justify-content: center;
}

.navbar-container {
  width: 90%;
  max-width: 1200px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-text-primary);
  text-decoration: none;
  letter-spacing: -1px;
}

.cyan-glow-text {
  color: var(--color-cyan);
  text-shadow: 0 0 10px var(--color-cyan-glow), 0 0 20px rgba(0, 242, 254, 0.1);
}

.nav-links {
  display: flex;
  gap: 2.5rem;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: var(--transition-speed);
  position: relative;
  padding: 0.5rem 0;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-cyan);
  box-shadow: 0 0 8px var(--color-cyan);
  transition: var(--transition-speed);
}

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

/* 4. Section Structure */
#scroll-container {
  position: relative;
  z-index: 10;
  width: 100%;
}

.section {
  width: 100%;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px 5%;
}

.section-content {
  width: 100%;
  max-width: 1200px;
  position: relative;
  z-index: 15;
}

/* Section Header styling (Orthogonal & Clean) */
.section-header {
  margin-bottom: 4rem;
  max-width: 600px;
}

.section-badge {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: var(--color-cyan);
  display: inline-block;
  margin-bottom: 0.8rem;
  font-weight: 600;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  letter-spacing: -0.5px;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  font-weight: 300;
}

/* 5. Glassmorphism Utilities */
.glass-panel {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  box-shadow: 0 8px 32px var(--glass-shadow);
  border-radius: var(--border-radius);
  transition: border-color var(--transition-speed), transform var(--transition-speed), box-shadow var(--transition-speed);
}

.glass-panel:hover {
  border-color: var(--glass-border-hover);
  box-shadow: 0 12px 40px rgba(0, 242, 254, 0.05);
}

.badge {
  display: inline-block;
  padding: 0.4rem 1rem;
  background: rgba(0, 242, 254, 0.08);
  border: 1px solid rgba(0, 242, 254, 0.25);
  border-radius: 50px;
  color: var(--color-cyan);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.5px;
  margin-bottom: 1.5rem;
}

/* 6. Buttons & Interactive elements */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.8rem;
  font-family: var(--font-heading);
  font-weight: 600;
  padding: 1rem 2rem;
  border-radius: 6px;
  cursor: pointer;
  text-decoration: none;
  font-size: 1rem;
  transition: all var(--transition-speed) cubic-bezier(0.16, 1, 0.3, 1);
  border: 1px solid transparent;
}

.btn-sm {
  padding: 0.5rem 1.2rem;
  font-size: 0.85rem;
}

.btn-cyan {
  background-color: var(--color-cyan);
  color: #030C1A;
  box-shadow: 0 4px 16px rgba(0, 242, 254, 0.25);
}

.btn-cyan:hover {
  background-color: #ffffff;
  color: #030C1A;
  box-shadow: 0 8px 24px rgba(255, 255, 255, 0.4);
  transform: translateY(-2px);
}

.btn-glass {
  background-color: rgba(255, 255, 255, 0.03);
  border-color: var(--glass-border);
  color: var(--color-text-primary);
  backdrop-filter: blur(8px);
}

.btn-glass:hover {
  background-color: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.25);
  transform: translateY(-2px);
}

.btn-full {
  width: 100%;
}

/* 7. Hero Section Layout */
.hero-content {
  display: flex;
  align-items: center;
  min-height: calc(100vh - var(--nav-height));
}

.hero-text-block {
  max-width: 650px;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: 4rem;
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 1.5rem;
  letter-spacing: -1.5px;
}

.gradient-text {
  background: linear-gradient(135deg, var(--color-cyan) 0%, #0077FF 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--color-text-secondary);
  font-weight: 300;
  margin-bottom: 2.5rem;
  max-width: 550px;
}

.hero-actions {
  display: flex;
  gap: 1.5rem;
}

/* 8. Projects Carousel & Stats Layout */
.projects-layout {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr;
  gap: 3rem;
  align-items: center;
}

.projects-carousel {
  position: relative;
  min-height: 250px;
}

.project-card {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  opacity: 0;
  pointer-events: none;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.project-card.active {
  position: relative;
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.project-card-glass {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius);
  padding: 3rem;
  box-shadow: 0 10px 40px var(--glass-shadow);
}

.project-card-glass:hover {
  border-color: var(--color-cyan);
  box-shadow: 0 15px 45px rgba(0, 242, 254, 0.06);
}

.project-icon {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
}

.project-name {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.project-summary {
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  margin-bottom: 1.5rem;
  font-weight: 300;
}

.project-tags {
  display: flex;
  gap: 0.8rem;
}

.project-tags span {
  font-size: 0.8rem;
  padding: 0.3rem 0.8rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 4px;
  color: var(--color-text-secondary);
}

/* Statistics Panel */
.stats-panel {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

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

.stat-number {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 0.2rem;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* Carousel Controls */
.carousel-controls {
  margin-top: 3rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.carousel-btn {
  background: transparent;
  border: 1px solid var(--glass-border);
  color: var(--color-text-secondary);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-speed);
}

.carousel-btn:hover {
  border-color: var(--color-cyan);
  color: var(--color-text-primary);
  box-shadow: 0 0 10px var(--color-cyan-glow);
}

.carousel-dots {
  display: flex;
  gap: 0.6rem;
}

.carousel-dots .dot {
  width: 8px;
  height: 8px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  cursor: pointer;
  transition: all var(--transition-speed);
}

.carousel-dots .dot.active {
  background: var(--color-cyan);
  box-shadow: 0 0 8px var(--color-cyan);
  width: 24px;
  border-radius: 4px;
}

/* 9. Services Layout */
.services-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

/* Left & Right spacing for service listings to center around 3D structure */
.services-list {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.left-services {
  padding-right: 8%;
}

.right-services {
  padding-left: 8%;
}

.service-item {
  padding: 2.2rem;
  position: relative;
  cursor: pointer;
}

.service-icon {
  font-size: 1.8rem;
  color: var(--color-cyan);
  margin-bottom: 1.2rem;
}

.service-item h4 {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 0.6rem;
}

.service-item p {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  font-weight: 300;
}

/* Connect layers to 3D via hover classes */
.service-item.active {
  border-color: var(--color-cyan);
  box-shadow: 0 0 20px rgba(0, 242, 254, 0.05);
}

/* 10. Technology Ecosystem Layout */
.tech-layout {
  display: flex;
  justify-content: flex-end; /* Pushes content right, leaves left space for 3D Keyboard landscape elements */
  width: 100%;
}

.holo-stack-container {
  width: 60%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.holo-stack {
  padding: 2.2rem;
  border-left: 3px solid var(--color-cyan);
}

.holo-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.holo-header i {
  font-size: 1.5rem;
  color: var(--color-cyan);
}

.holo-header h3 {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 600;
}

.holo-list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.holo-list li {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  font-size: 0.95rem;
  color: var(--color-text-secondary);
}

.holo-list .bullet {
  width: 6px;
  height: 6px;
  background-color: var(--color-cyan);
  box-shadow: 0 0 6px var(--color-cyan);
  border-radius: 50%;
}

/* 11. Contact Section Layout */
.contact-layout {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3rem;
  align-items: flex-start;
}

.contact-form {
  padding: 3rem;
}

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

.form-group {
  margin-bottom: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.form-group input, .form-group textarea {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--glass-border);
  padding: 0.9rem 1.2rem;
  border-radius: 6px;
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: 0.95rem;
  outline: none;
  transition: all var(--transition-speed);
}

.form-group input:focus, .form-group textarea:focus {
  border-color: var(--color-cyan);
  background: rgba(0, 242, 254, 0.01);
  box-shadow: 0 0 10px rgba(0, 242, 254, 0.1);
}

.contact-info {
  padding: 3rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.contact-info h3 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 600;
}

.contact-info p {
  color: var(--color-text-secondary);
  font-size: 1rem;
  line-height: 1.6;
  font-weight: 300;
}

.info-links {
  margin-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.info-link {
  display: flex;
  align-items: center;
  gap: 1rem;
  color: var(--color-text-primary);
  text-decoration: none;
  font-size: 1.05rem;
  transition: var(--transition-speed);
}

.info-link i {
  font-size: 1.2rem;
}

a.info-link:hover {
  color: var(--color-cyan);
  text-shadow: 0 0 10px var(--color-cyan-glow);
}

/* 12. Footer Styling */
footer {
  width: 100%;
  border-top: 1px solid var(--glass-border);
  background-color: #03070E;
  padding: 3rem 5%;
  position: relative;
  z-index: 10;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-left .logo {
  font-size: 1.5rem;
}

.footer-tagline {
  font-size: 0.85rem;
  color: var(--color-text-dim);
  margin-top: 0.4rem;
}

.footer-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.5rem;
}

.copyright {
  font-size: 0.85rem;
  color: var(--color-text-dim);
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  color: var(--color-text-dim);
  text-decoration: none;
  font-size: 0.85rem;
  transition: var(--transition-speed);
}

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

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */

@media (max-width: 1024px) {
  .projects-layout {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .services-layout {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .left-services, .right-services {
    padding: 0;
  }

  .tech-layout {
    justify-content: center;
  }
  
  .holo-stack-container {
    width: 100%;
  }

  .contact-layout {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

@media (max-width: 768px) {
  :root {
    --nav-height: 70px;
  }

  .nav-links {
    display: none; /* In a real app, a hamburger would go here. Minimal design for concept. */
  }

  .section {
    padding: 100px 5%;
  }

  .hero-title {
    font-size: 2.8rem;
  }

  .hero-subtitle {
    font-size: 1.05rem;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .footer-content {
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    text-align: center;
  }

  .footer-right {
    align-items: center;
  }

  .holo-stack-container {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   13. Loading Screen & CSS 3D Tab Keycap
   ========================================================================== */
body.loading-state {
  overflow: hidden;
  height: 100vh;
}

#loader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: #050B14;
  z-index: 99999;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.8s ease;
  overflow: hidden;
}

#loader.fade-out {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loader-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3rem;
  perspective: 1000px;
}

/* Mechanical Keyboard Keycap Container */
.keyboard-base {
  background: #0e1624;
  padding: 1.5rem 2rem;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  box-shadow: 
    0 15px 35px rgba(0, 0, 0, 0.6),
    inset 0 1px 0 rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: keyFloat 4s ease-in-out infinite;
  transform-style: preserve-3d;
  transform: rotateX(20deg) rotateY(-10deg);
  transition: transform 0.5s ease;
}

.keyboard-base:hover {
  transform: rotateX(15deg) rotateY(-5deg) scale(1.05);
}

/* 3D Tab Key */
.key-tab {
  position: relative;
  width: 150px;
  height: 80px;
  background: linear-gradient(135deg, #182335 0%, #111a28 100%);
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 0.8rem 1rem;
  user-select: none;
  transform-style: preserve-3d;
  transform: translateZ(20px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 
    0 4px 0 #0c121e,
    0 8px 16px rgba(0, 0, 0, 0.5),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
  transition: transform 0.1s ease, box-shadow 0.1s ease, background 0.1s ease;
}

/* Key Legends */
.key-label {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  letter-spacing: 1.5px;
  transition: color 0.3s;
}

.key-icon {
  align-self: flex-end;
  font-size: 1.2rem;
  color: var(--color-text-dim);
  transition: color 0.3s;
}

/* Pressed State */
.key-tab.pressed {
  transform: translateZ(5px);
  background: linear-gradient(135deg, #0a1320 0%, #060a12 100%);
  box-shadow: 
    0 1px 0 #05080e,
    0 2px 4px rgba(0, 0, 0, 0.8),
    0 0 20px rgba(0, 242, 254, 0.4);
  border-color: rgba(0, 242, 254, 0.3);
}

.key-tab.pressed .key-label,
.key-tab.pressed .key-icon {
  color: var(--color-cyan);
  text-shadow: 0 0 8px var(--color-cyan-glow);
}

/* Prompt Block */
.loader-prompt {
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.prompt-text {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--color-text-secondary);
  animation: pulseOpacity 2s ease-in-out infinite;
}

.cyan-key {
  color: var(--color-cyan);
  background: rgba(0, 242, 254, 0.1);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  border: 1px solid rgba(0, 242, 254, 0.2);
  margin: 0 0.3rem;
  box-shadow: 0 0 10px rgba(0, 242, 254, 0.05);
}

/* Loading Progress Bar */
.loading-bar-container {
  width: 220px;
  height: 4px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.02);
}

.loading-bar {
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, #0077FF 0%, var(--color-cyan) 100%);
  box-shadow: 0 0 8px var(--color-cyan);
  transition: width 0.4s ease-out;
}

/* Animations */
@keyframes keyFloat {
  0%, 100% {
    transform: rotateX(20deg) rotateY(-10deg) translateY(0);
  }
  50% {
    transform: rotateX(20deg) rotateY(-10deg) translateY(-10px);
  }
}

@keyframes pulseOpacity {
  0%, 100% {
    opacity: 0.5;
  }
  50% {
    opacity: 1;
  }
}