/* ========================================
   MIRALAB - Personal Tech Lab
   Responsive Stylesheet with Dark/Light Mode
   ======================================== */

/* CSS Variables for theming */
:root {
  /* Dark mode (default) */
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent-primary: #38bdf8;
  --accent-secondary: #0ea5e9;
  --accent-glow: rgba(56, 189, 248, 0.3);
  --border-color: #334155;
  --shadow-color: rgba(0, 0, 0, 0.3);
  --transition-speed: 0.3s;
}

/* Light mode overrides */
[data-theme="light"] {
  --bg-primary: #ffffff;
  --bg-secondary: #f1f5f9;
  --bg-tertiary: #e2e8f0;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --accent-primary: #0284c7;
  --accent-secondary: #0369a1;
  --accent-glow: rgba(2, 132, 199, 0.2);
  --border-color: #cbd5e1;
  --shadow-color: rgba(0, 0, 0, 0.1);
}

/* Reset and base styles */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background-color var(--transition-speed), color var(--transition-speed);
  min-height: 100vh;
}

/* ========================================
   NAVIGATION
   ======================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 70px;
  background-color: rgba(var(--bg-primary), 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 5%;
  transition: background-color var(--transition-speed);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.25rem;
}

.brand-logo {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: bold;
  font-size: 1.1rem;
}

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

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

.nav-links a:hover,
.nav-links a:focus {
  color: var(--accent-primary);
}

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

.nav-links a:hover::after,
.nav-links a:focus::after {
  width: 100%;
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Theme toggle button */
.theme-toggle {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  width: 40px;
  height: 40px;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-speed);
}

.theme-toggle:hover {
  background: var(--accent-primary);
  color: white;
  border-color: var(--accent-primary);
}

/* Mobile menu button */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.5rem;
}

/* ========================================
   HERO SECTION
   ======================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 100px 5% 60px;
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 50%;
  height: 100%;
  background: radial-gradient(circle at 70% 50%, var(--accent-glow) 0%, transparent 50%);
  pointer-events: none;
}

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  width: 100%;
}

.hero-content {
  z-index: 1;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  padding: 8px 16px;
  border-radius: 50px;
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.status-badge::before {
  content: '';
  width: 8px;
  height: 8px;
  background: #22c55e;
  border-radius: 50%;
  animation: pulse 2s infinite;
}

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

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.5rem;
}

.hero-title .accent {
  color: var(--accent-primary);
  display: block;
}

.hero-description {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 500px;
  margin-bottom: 2rem;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-speed);
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: white;
  box-shadow: 0 4px 15px var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--accent-glow);
}

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: var(--border-color);
}

/* Hero Image */
.hero-image {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-image-wrapper {
  position: relative;
  width: 100%;
  max-width: 450px;
}

.hero-image-wrapper img {
  width: 100%;
  height: auto;
  border-radius: 20px;
  box-shadow: 0 25px 50px -12px var(--shadow-color);
  border: 2px solid var(--border-color);
}

.image-glow {
  position: absolute;
  top: -20px;
  right: -20px;
  bottom: -20px;
  left: -20px;
  background: linear-gradient(135deg, var(--accent-glow), transparent);
  border-radius: 30px;
  z-index: -1;
  filter: blur(20px);
}

/* Hero Stats */
.hero-stats {
  display: flex;
  gap: 3rem;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent-primary);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* ========================================
   ABOUT SECTION
   ======================================== */
.about {
  padding: 100px 5%;
  background-color: var(--bg-secondary);
}

.about-container {
  max-width: 800px;
  margin: 0 auto;
}

.section-label {
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-primary);
  margin-bottom: 1rem;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

.about-text {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ========================================
   PROJECTS / STACK SECTION
   ======================================== */
.projects {
  padding: 100px 5%;
  background-color: var(--bg-primary);
}

.projects-container {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 3rem;
}

.project-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 2.5rem 2rem;
  border-radius: 16px;
  transition: all var(--transition-speed);
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.project-card:hover {
  transform: translateY(-5px);
  border-color: var(--accent-primary);
  box-shadow: 0 10px 30px var(--shadow-color);
}

.project-icon {
  width: 48px;
  height: 48px;
  background: var(--bg-tertiary);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-primary);
  margin-bottom: 0.5rem;
}

.project-icon svg {
  width: 24px;
  height: 24px;
}

.project-card h3 {
  font-size: 1.25rem;
  color: var(--text-primary);
}

.project-card p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}


/* ========================================
   FOOTER
   ======================================== */
.footer {
  background-color: var(--bg-primary);
  border-top: 1px solid var(--border-color);
  padding: 60px 5% 30px;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer-brand .brand-logo {
  width: 50px;
  height: 50px;
  font-size: 1.5rem;
}

.footer-brand h3 {
  font-size: 1.25rem;
  color: var(--text-primary);
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  max-width: 300px;
}

.footer-links h4,
.footer-contact h4 {
  font-size: 1rem;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.footer-links ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color var(--transition-speed);
}

.footer-links a:hover {
  color: var(--accent-primary);
}

.footer-contact p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.footer-bottom {
  max-width: 1200px;
  margin: 3rem auto 0;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */

/* Tablet (768px - 1024px) */
@media (max-width: 1024px) {
  .hero-container {
    gap: 2rem;
  }
  
  .hero-title {
    font-size: clamp(2rem, 4vw, 3rem);
  }
  
  .footer-container {
    grid-template-columns: 1fr 1fr;
  }
}

/* Mobile (< 768px) */
@media (max-width: 768px) {
  .navbar {
    padding: 0 1rem;
  }
  
  .nav-links {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background-color: var(--bg-primary);
    flex-direction: column;
    padding: 2rem;
    gap: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-speed);
  }
  
  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .mobile-menu-btn {
    display: block;
  }
  
  .hero {
    padding: 100px 1rem 60px;
  }
  
  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero-content {
    order: 1;
  }
  
  .hero-image {
    order: 0;
  }
  
  .hero-description {
    margin-left: auto;
    margin-right: auto;
  }
  
  .hero-buttons {
    justify-content: center;
  }
  
  .hero-stats {
    justify-content: center;
    gap: 2rem;
  }
  
  .about {
    padding: 60px 1rem;
  }
  
  .footer-container {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 2rem;
  }
  
  .footer-brand {
    align-items: center;
  }
  
  .footer-brand p {
    max-width: 100%;
  }
}

/* Small mobile (< 480px) */
@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-buttons {
    flex-direction: column;
    width: 100%;
  }
  
  .btn {
    width: 100%;
  }
  
  .hero-stats {
    flex-direction: column;
    gap: 1.5rem;
    align-items: center;
  }
}

/* ========================================
   ACCESSIBILITY
   ======================================== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  html {
    scroll-behavior: auto;
  }
}

/* Focus styles for keyboard navigation */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --text-secondary: #ffffff;
    --border-color: #ffffff;
  }
}