/* ===== CSS Variables & Design System ===== */
:root {
  /* Colors - HSL format for easy theme switching */
  --bg-dark: 250 60% 15%;
  --bg-card: 248 50% 18%;
  --text-primary: 48 100% 96%;
  --text-muted: 48 50% 80%;
  
  --primary: 295 73% 51%;
  --primary-foreground: 0 0% 100%;
  --accent: 190 85% 50%;
  --accent-foreground: 0 0% 100%;
  
  --border: 248 30% 30%;
  --border-hover: 295 73% 51%;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, hsl(295 73% 51%), hsl(190 85% 50%));
  --gradient-bg: linear-gradient(180deg, hsl(250 60% 15%), hsl(248 50% 18%));
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  
  /* Typography */
  --font-primary: 'Inter', 'Poppins', sans-serif;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;
  --font-size-5xl: 3rem;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 30px rgba(208, 52, 174, 0.3);
}

/* Light theme */
body.light-theme {
  --bg-dark: 0 0% 98%;
  --bg-card: 0 0% 100%;
  --text-primary: 250 60% 15%;
  --text-muted: 0 0% 40%;
  --border: 0 0% 90%;
}

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

html {
  scroll-behavior: smooth;
}

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

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  text-decoration: none;
  color: inherit;
}

/* ===== Theme Toggle ===== */
.theme-toggle {
  position: fixed;
  top: 100px;
  right: 20px;
  z-index: 1000;
  background: hsl(var(--bg-card));
  border: 1px solid hsl(var(--border));
  border-radius: 50%;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-md);
}

.theme-toggle:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-glow);
  border-color: hsl(var(--primary));
}

.theme-toggle .sun-icon {
  display: none;
  color: hsl(var(--primary));
}

.theme-toggle .moon-icon {
  display: block;
  color: hsl(var(--accent));
}

body.light-theme .theme-toggle .sun-icon {
  display: block;
}

body.light-theme .theme-toggle .moon-icon {
  display: none;
}

/* ===== Navbar ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 999;
  transition: all var(--transition-base);
  padding: var(--spacing-md) 0;
}

.navbar.scrolled {
  background: hsl(var(--bg-card) / 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-sm) 0;
}

.navbar-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo img {
  max-height: 65px;
}

.navbar-logo {
  font-size: var(--font-size-xl);
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.navbar-nav {
  display: flex;
  gap: var(--spacing-lg);
}

.nav-link {
  font-size: var(--font-size-sm);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width var(--transition-base);
}

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

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

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 5px;
}

.mobile-menu-toggle span {
  width: 25px;
  height: 2px;
  background: hsl(var(--text-primary));
  transition: all var(--transition-fast);
}

.mobile-nav {
  display: none;
  flex-direction: column;
  gap: var(--spacing-sm);
  padding: var(--spacing-lg);
  background: hsl(var(--bg-card));
  border-top: 1px solid hsl(var(--border));
}

.mobile-nav.active {
  display: flex;
}

/* ===== Hero Section ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: url('src/assets/background12.png') center/cover no-repeat;
  position: relative;
  padding: var(--spacing-2xl) var(--spacing-lg);
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, hsl(var(--bg-dark) / 0.9), hsl(var(--bg-card) / 0.8));
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
}

.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  color: hsl(var(--accent));
  margin-bottom: var(--spacing-sm);
}

.typing-effect {
  border-right: 3px solid hsl(var(--accent));
  animation: typing 4s steps(20, end) forwards, blink 0.75s step-end infinite;
}

.typing-demo {
  /* border-right: 3px solid hsl(var(--accent)); */
  white-space: nowrap;
  overflow: hidden;
  animation: typing 3s steps(11, end) forwards;
  display: inline-block;
}

@keyframes typing {
  from {
    width: 1ch;
  }
  to {
    width: 11ch;
  }
}
 
@keyframes blink {
  50% { border-color: transparent; }
}

.hero-description {
  font-size: var(--font-size-lg);
  color: hsl(var(--text-muted));
  margin-bottom: var(--spacing-xl);
}

.social-links {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: hsl(var(--bg-card) / 0.5);
  border: 1px solid hsl(var(--border));
  transition: all var(--transition-base);
  backdrop-filter: blur(10px);
}

.social-link:hover {
  transform: translateY(-5px);
  background: hsl(var(--primary));
  border-color: hsl(var(--primary));
  box-shadow: var(--shadow-glow);
}

.scroll-indicator {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
}

.mouse {
  width: 25px;
  height: 40px;
  border: 2px solid hsl(var(--text-muted));
  border-radius: 20px;
  position: relative;
}

.mouse::before {
  content: '';
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 8px;
  background: hsl(var(--accent));
  border-radius: 2px;
  animation: scroll 2s infinite;
}

@keyframes scroll {
  0%, 20% { transform: translateX(-50%) translateY(0); opacity: 1; }
  100% { transform: translateX(-50%) translateY(15px); opacity: 0; }
}

/* ===== About Section ===== */
.about-section {
  padding: var(--spacing-2xl) 0;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
  align-items: center;
}

.about-image img {
  border-radius: 20px;
  box-shadow: var(--shadow-lg);
  border: 2px solid hsl(var(--border));
}

.section-title {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  margin-bottom: var(--spacing-xl);
  color: hsl(var(--primary));
  text-align: center;
}

.about-content .section-title {
  text-align: left;
}

.about-text {
  font-size: var(--font-size-base);
  line-height: 1.8;
  color: hsl(var(--text-muted));
  margin-bottom: var(--spacing-md);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: 8px;
  font-weight: 600;
  transition: all var(--transition-base);
  cursor: pointer;
  border: none;
  font-size: var(--font-size-base);
}

.btn-primary {
  background: hsl(var(--primary));
  color: hsl(var(--primary-foreground));
}

.btn-primary:hover {
  background: hsl(var(--primary) / 0.9);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

/* ===== Skills Section ===== */
.skills-section {
  padding: var(--spacing-2xl) 0;
  background: hsl(var(--bg-card) / 0.3);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

.skill-column {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.skill-card {
  background: hsl(var(--bg-card) / 0.5);
  border: 1px solid hsl(var(--border) / 0.5);
  border-radius: 12px;
  padding: var(--spacing-lg);
  backdrop-filter: blur(10px);
  transition: all var(--transition-base);
}

.skill-card:hover {
  border-color: hsl(var(--primary) / 0.5);
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.skill-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-sm);
}

.skill-name {
  font-size: var(--font-size-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.skill-level {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: hsl(var(--accent));
}

.progress-bar {
  height: 8px;
  background: hsl(var(--border));
  border-radius: 10px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--gradient-primary);
  border-radius: 10px;
  width: 0;
  transition: width 1s ease;
}

/* ===== Education Section ===== */
.education-section {
  padding: var(--spacing-2xl) 0;
}

.accordion {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.accordion-item {
  background: hsl(var(--bg-card) / 0.5);
  border: 1px solid hsl(var(--border) / 0.5);
  border-radius: 12px;
  backdrop-filter: blur(10px);
  overflow: hidden;
}

.accordion-trigger {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-lg);
  background: none;
  border: none;
  color: hsl(var(--text-primary));
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.accordion-trigger:hover {
  color: hsl(var(--primary));
}

.accordion-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-lg);
  font-weight: 600;
}

.icon-primary {
  color: hsl(var(--primary));
}

.icon-accent {
  color: hsl(var(--accent));
}

.accordion-icon {
  transition: transform var(--transition-base);
}

.accordion-item.active .accordion-icon {
  transform: rotate(180deg);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-base);
  padding: 0 var(--spacing-lg);
  color: hsl(var(--text-muted));
}

.accordion-item.active .accordion-content {
  max-height: 200px;
  padding: 0 var(--spacing-lg) var(--spacing-lg);
}

/* ===== Projects Section ===== */
.projects-section {
  padding: var(--spacing-2xl) 0;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

.project-card {
  background: hsl(var(--bg-card) / 0.5);
  border: 1px solid hsl(var(--border) / 0.5);
  border-radius: 12px;
  backdrop-filter: blur(10px);
  overflow: hidden;
  transition: all var(--transition-base);
}

.project-card:hover {
  border-color: hsl(var(--primary) / 0.5);
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.project-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.project-content {
  padding: var(--spacing-lg);
}

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

.project-description {
  font-size: var(--font-size-base);
  color: hsl(var(--text-muted));
  margin-bottom: var(--spacing-md);
}

.project-links {
  display: flex;
  gap: var(--spacing-sm);
}

.project-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: 8px;
  font-weight: 600;
  transition: all var(--transition-base);
  cursor: pointer;
  border: none;
  font-size: var(--font-size-sm);
  background: hsl(var(--primary));
  color: hsl(var(--primary-foreground));
}

.project-link:hover {
  background: hsl(var(--primary) / 0.9);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

/* ===== Contact Section ===== */ 
.contact-section {
  padding: var(--spacing-2xl) 0;
  background: hsl(var(--bg-card) / 0.3);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
  max-width: 1000px;
  margin: 0 auto;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.contact-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  background: hsl(var(--bg-card) / 0.5);
  border: 1px solid hsl(var(--border));
  border-radius: 12px;
  backdrop-filter: blur(10px);
  transition: all var(--transition-base);
}

.contact-item:hover {
  border-color: hsl(var(--primary));
  transform: translateX(5px);
}

.contact-item svg {
  color: hsl(var(--accent));
  flex-shrink: 0;
}

.social-links-contact {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.form-group label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: hsl(var(--text-muted));
}

.form-group input,
.form-group textarea {
  padding: var(--spacing-sm);
  background: hsl(var(--bg-card));
  border: 1px solid hsl(var(--border));
  border-radius: 8px;
  color: hsl(var(--text-primary));
  font-family: inherit;
  font-size: var(--font-size-base);
  transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: hsl(var(--primary));
  box-shadow: 0 0 0 3px hsl(var(--primary) / 0.1);
}

.contact-form .btn {
  position: relative;
}

.contact-form .btn.loading .btn-text {
  opacity: 0;
}

.contact-form .btn.loading .btn-loading {
  opacity: 1;
}

.btn-loading {
  position: absolute;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

/* ===== Footer ===== */
.footer {
  padding: var(--spacing-xl) 0;
  background: hsl(var(--bg-card));
  border-top: 1px solid hsl(var(--border));
  text-align: center;
}

.footer .container {
  position: relative;
}

.scroll-to-top {
  position: absolute;
  right: var(--spacing-lg);
  top: 50%;
  transform: translateY(-50%);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: hsl(var(--primary));
  border: none;
  color: hsl(var(--primary-foreground));
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
  opacity: 0;
  pointer-events: none;
}

.scroll-to-top.visible {
  opacity: 1;
  pointer-events: all;
}

.scroll-to-top:hover {
  transform: translateY(-50%) scale(1.1);
  box-shadow: var(--shadow-glow);
}

/* ===== Toast Notification ===== */
.toast {
  position: fixed;
  bottom: -100px;
  right: 20px;
  background: hsl(var(--bg-card));
  border: 1px solid hsl(var(--border));
  border-radius: 12px;
  padding: var(--spacing-md) var(--spacing-lg);
  box-shadow: var(--shadow-lg);
  transition: bottom var(--transition-base);
  z-index: 9999;
  max-width: 350px;
}

.toast.show {
  bottom: 20px;
}

/* ===== Animations ===== */
@keyframes fade-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

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

@keyframes scale-in {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.animate-fade-in {
  animation: fade-in 0.6s ease-out;
}

.animate-slide-up {
  animation: slide-up 0.6s ease-out;
}

.animate-scale-in {
  animation: scale-in 0.6s ease-out;
}

/* ===== Responsive Design ===== */
@media (max-width: 968px) {
  .skills-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .desktop-nav {
    display: none;
  }
  
  .mobile-menu-toggle {
    display: flex;
  }
  
  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }
  
  .skills-grid {
    grid-template-columns: 1fr;
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
  }
  
  .section-title {
    font-size: var(--font-size-3xl);
  }
  
  .hero-title {
    font-size: var(--font-size-3xl);
  }
  
  .scroll-to-top {
    position: fixed;
    right: 20px;
    bottom: 80px;
    top: auto;
    transform: none;
  }
  
  .scroll-to-top:hover {
    transform: scale(1.1);
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  .social-links {
    gap: var(--spacing-sm);
  }
  
  .social-link {
    width: 40px;
    height: 40px;
  }
}