/* ============================================================================
   HARDCORE GLASS PORTFOLIO - UNIFIED CSS SYSTEM
   Design Philosophy: Advanced CSS backdrop filters, neon accents, deep-space
   background with high-contrast glass morphism effects.
   ============================================================================ */

/* ============================================================================
   1. GLOBAL RESET & CSS VARIABLES
   ============================================================================ */

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

:root {
  /* Color Palette */
  --primary-cyan: #00d2ff;
  --primary-lime: #00ff44;
  --accent-purple: #7575a0;
  --dark-bg: #000000;
  --dark-space: #000360;
  --glass-bg: rgba(255, 255, 255, 0.03);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-shadow: rgba(0, 0, 0, 0.8);
  --text-primary: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.7);
  --text-muted: rgba(255, 255, 255, 0.5);

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: 2.5rem;
  --font-size-4xl: 3.5rem;

  /* Transitions */
  --transition-fast: 0.2s ease-in-out;
  --transition-base: 0.3s ease-in-out;
  --transition-slow: 0.5s ease-in-out;

  /* Shadows */
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.5);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.8);
  --shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.9);
}

/* ============================================================================
   2. TYPOGRAPHY & BASE STYLES
   ============================================================================ */

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  color: var(--text-primary);
  background: linear-gradient(135deg, rgba(117, 117, 158, 0.2) 0%, transparent 50%),
              radial-gradient(circle at bottom right, var(--dark-space), var(--dark-bg));
  background-attachment: fixed;
  line-height: 1.6;
  overflow-x: hidden;
}

/* Gradient Text Class */
.gradient-text {
  background: linear-gradient(90deg, var(--primary-cyan), var(--primary-lime));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 900;
  
}

/* ============================================================================
   3. GLASS CARD SYSTEM
   ============================================================================ */

.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(15px) saturate(180%) brightness(1.2);
  border: 1px solid var(--glass-border);
  box-shadow: 0 8px 32px 0 var(--glass-shadow);
  border-radius: 12px;
  padding: var(--spacing-lg);
  transition: all var(--transition-base);
}

.glass-card:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.15);
  box-shadow: 0 12px 48px 0 rgba(0, 212, 255, 0.2);
  transform: translateY(-4px);
}

/* ============================================================================
   4. NAVBAR & HEADER
   ============================================================================ */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  height: 100px;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--spacing-lg);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.navbar-brand {
  font-size: var(--font-size-2xl);
  font-weight: 900;
  text-decoration: none;
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.navbar-brand:hover {
  color: var(--primary-cyan);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
  align-items: center;
}

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

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

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary-cyan), var(--primary-lime));
  border-radius: 1px;
}

/* ============================================================================
   5. MAIN CONTENT & LAYOUT
   ============================================================================ */

main {
  padding-top: 100px;
  min-height: calc(100vh - 100px);
}

section {
  padding: var(--spacing-2xl) var(--spacing-lg);
}

/* ============================================================================
   6. HERO SECTION
   ============================================================================ */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero-content {
  max-width: 800px;
  z-index: 10;
  animation: fadeInUp 0.8s ease-out;
}

.hero h1 {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  margin-bottom: var(--spacing-md);
  line-height: 1.2;
}

.hero p {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.cta-button {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-xl);
  background: linear-gradient(135deg, var(--primary-cyan), var(--primary-lime));
  color: var(--dark-bg);
  text-decoration: none;
  border: none;
  border-radius: 8px;
  font-weight: 700;
  font-size: var(--font-size-base);
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: 0 4px 20px rgba(0, 210, 255, 0.4);
}

.cta-button:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(0, 255, 68, 0.5);
  filter: brightness(1.1);
}

.cta-button:active {
  transform: translateY(-2px);
}

/* ============================================================================
   7. PROJECT GRID & CARDS
   ============================================================================ */

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.project-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border-radius: 12px;
  transition: all var(--transition-base);
  cursor: pointer;
}

.project-card figure {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 250px;
  overflow: hidden;
  background: linear-gradient(135deg, rgba(0, 210, 255, 0.1), rgba(0, 255, 68, 0.1));
}

.project-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-base);
}

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

.project-info {
  padding: var(--spacing-lg);
  background: var(--glass-bg);
  backdrop-filter: blur(15px);
  border: 1px solid var(--glass-border);
  border-top: none;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.project-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: var(--primary-cyan);
}

.project-description {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
  flex-grow: 1;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
}

.tag {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-sm);
  background: rgba(0, 210, 255, 0.1);
  border: 1px solid var(--primary-cyan);
  border-radius: 4px;
  font-size: var(--font-size-xs);
  color: var(--primary-cyan);
  font-weight: 600;
}

.project-card:hover {
  transform: translateY(-10px) scale(1.02);
  box-shadow: 0 12px 48px rgba(0, 210, 255, 0.3);
}

/* ============================================================================
   8. CONTACT SECTION
   ============================================================================ */

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.contact-card {
  text-align: center;
  transition: all var(--transition-base);
}

#email-card,
#github-card,
#linkedin-card,
#twitter-card {
  padding: var(--spacing-lg);
  background: var(--glass-bg);
  backdrop-filter: blur(15px);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  transition: all var(--transition-base);
}

#email-card:hover,
#github-card:hover,
#linkedin-card:hover,
#twitter-card:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--primary-cyan);
  box-shadow: 0 8px 32px rgba(0, 210, 255, 0.2);
  transform: translateY(-8px);
}

.contact-icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
  color: var(--primary-cyan);
  transition: transform var(--transition-base);
}

#email-card:hover .contact-icon,
#github-card:hover .contact-icon,
#linkedin-card:hover .contact-icon,
#twitter-card:hover .contact-icon {
  transform: scale(1.2) rotate(5deg);
}

.contact-label {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
}

.contact-link {
  display: inline-block;
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--primary-cyan);
  text-decoration: none;
  transition: all var(--transition-fast);
  word-break: break-all;
}

.contact-link:hover {
  color: var(--primary-lime);
  text-decoration: underline;
}

/* ============================================================================
   9. FOOTER
   ============================================================================ */

footer {
  background: rgba(0, 0, 0, 0.6);
  border-top: 1px solid var(--glass-border);
  padding: var(--spacing-xl) var(--spacing-lg);
  text-align: center;
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
}

footer p {
  margin: 0;
}

/* ============================================================================
   10. ANIMATIONS
   ============================================================================ */

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

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all var(--transition-slow);
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================================
   11. RESPONSIVE DESIGN - MOBILE FIRST
   ============================================================================ */

/* Tablet (768px and up) */
@media (min-width: 768px) {
  .navbar {
    padding: 0 var(--spacing-xl);
  }

  section {
    padding: var(--spacing-2xl) var(--spacing-xl);
  }

  .hero h1 {
    font-size: 3rem;
  }

  .hero p {
    font-size: var(--font-size-lg);
  }

  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Desktop (1024px and up) */
@media (min-width: 1024px) {
  .navbar {
    padding: 0 var(--spacing-2xl);
  }

  section {
    padding: var(--spacing-2xl) var(--spacing-2xl);
  }

  .hero h1 {
    font-size: var(--font-size-4xl);
  }

  .projects-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .contact-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Mobile (below 768px) */
@media (max-width: 767px) {
  .navbar {
    padding: 0 var(--spacing-md);
    height: 80px;
  }

  main {
    padding-top: 80px;
  }

  .navbar-brand {
    font-size: var(--font-size-lg);
  }

  .nav-links {
    gap: var(--spacing-md);
  }

  .nav-link {
    font-size: var(--font-size-sm);
  }

  section {
    padding: var(--spacing-xl) var(--spacing-md);
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero p {
    font-size: var(--font-size-base);
  }

  .cta-button {
    padding: var(--spacing-xs) var(--spacing-lg);
    font-size: var(--font-size-sm);
  }

  .projects-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  .project-card figure {
    height: 200px;
  }
}

/* ============================================================================
   12. ACCESSIBILITY & FOCUS STATES
   ============================================================================ */

a:focus,
button:focus {
  outline: 2px solid var(--primary-cyan);
  outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: more) {
  .glass-card {
    border-color: rgba(255, 255, 255, 0.3);
  }

  .nav-link {
    font-weight: 600;
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ============================================================================
   13. UTILITY CLASSES
   ============================================================================ */

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.text-center {
  text-align: center;
}

.mt-lg {
  margin-top: var(--spacing-lg);
}

.mb-lg {
  margin-bottom: var(--spacing-lg);
}

.opacity-reduced {
  opacity: 0.7;
}

/* 6. Component: Download Button (Non-Destructive) */
.project-actions {
    margin-top: 20px;
    display: flex;
    justify-content: flex-start;
}

.download-btn {
    display: inline-block;
    padding: 10px 25px;
    background: rgb(255, 0, 0); /* Subtle Cyan Tint */
    color: #00ff44; /* Neon Green Text */
    text-decoration: none;
    border: 1px solid rgb(255, 0, 0);
    border-radius: 8px;
    backdrop-filter: blur(5px);
    transition: all 0.3s ease;
    font-size: 0.9rem;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.download-btn:hover {
    background: rgb(255, 0, 0);
    box-shadow: 0 0 15px rgba(175, 32, 32, 0.59);
    transform: translateY(-2px);
    border-color: #00ff44;
}

/* 7. Elite Card Internal Layout */
.project-card {
    display: flex;
    flex-direction: column;
    height: 100%; /* Ensures all cards in a row have equal height */
}

.project-info {
    display: flex;
    flex-direction: column;
    flex-grow: 1; /* This pushes the button to the bottom */
    padding: 20px;
}

.tech-stack {
    margin-bottom: 12px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.project-summary {
    margin-bottom: 20px;
    flex-grow: 1; /* Takes up available space to keep buttons aligned */
    line-height: 1.5;
}

.project-actions {
    margin-top: auto; /* Final insurance to push button to the absolute bottom */
    padding-top: 15px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.download-btn {
    display: block;
    text-align: center;
    width: 100%; /* Makes button fit the card width perfectly */
    padding: 12px;
    background: rgba(0, 210, 255, 0.05);
    border: 1px solid #00d2ff;
    color: #00ff44;
    text-decoration: none;
    border-radius: 4px;
    font-weight: bold;
    transition: 0.3s;
}

.download-btn:hover {
    background: #00d2ff;
    color: #000;
    box-shadow: 0 0 20px rgba(0, 210, 255, 0.6);
}