/* ===================================
   CSS Variables & Reset
   =================================== */
:root {
  /* Color Palette - Soft Pastel Theme */
  --color-background: #fdfbf7;
  --color-surface: #ffffff;
  --color-primary: #a7c7e7;
  --color-primary-dark: #8bafd1;
  --color-accent: #e8b4b8;
  --color-text: #2c3e50;
  --color-text-light: #6b7280;
  --color-border: #e5e7eb;

  /* Typography */
  --font-family: "Poppins", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-size-base: 16px;
  --font-weight-light: 300;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);

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

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

html {
  scroll-behavior: smooth;
  font-size: var(--font-size-base);
}

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

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

/* ===================================
   Navbar
   =================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--spacing-md) 0;
  transition: all var(--transition-base);
}

.navbar.scrolled {
  background-color: rgba(253, 251, 247, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
}

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

.logo {
  font-size: 1.25rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.logo:hover {
  color: var(--color-primary);
}

.nav-links {
  display: flex;
  gap: var(--spacing-lg);
  align-items: center;
}

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

.nav-link::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--transition-base);
}

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

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

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
}

.mobile-menu-btn span {
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  transition: all var(--transition-base);
}

/* ===================================
   Hero Section
   =================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding: var(--spacing-3xl) 0;
  overflow: hidden;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  align-items: center;
  position: relative;
  z-index: 2;
}

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

.hero-title {
  font-size: 3.5rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  line-height: 1.2;
}

.hero-subtitle {
  font-size: 1.5rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-primary);
}

.hero-tagline {
  font-size: 1.125rem;
  color: var(--color-text-light);
  font-style: italic;
  line-height: 1.6;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
}

.hero-image {
  display: flex;
  justify-content: center;
  align-items: center;
}

.profile-photo {
  width: 400px;
  height: 400px;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  position: relative;
}

.profile-photo::before {
  content: "";
  position: absolute;
  inset: -4px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  border-radius: var(--radius-xl);
  z-index: -1;
}

.profile-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-background {
  position: absolute;
  inset: 0;
  z-index: 1;
  overflow: hidden;
}

.gradient-circle {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.3;
  animation: float 20s infinite ease-in-out;
}

.circle-1 {
  width: 400px;
  height: 400px;
  background: var(--color-primary);
  top: 10%;
  right: 10%;
  animation-delay: 0s;
}

.circle-2 {
  width: 300px;
  height: 300px;
  background: var(--color-accent);
  bottom: 20%;
  left: 5%;
  animation-delay: 5s;
}

.circle-3 {
  width: 250px;
  height: 250px;
  background: var(--color-primary);
  top: 50%;
  left: 50%;
  animation-delay: 10s;
}

@keyframes float {
  0%,
  100% {
    transform: translate(0, 0) scale(1);
  }
  33% {
    transform: translate(30px, -30px) scale(1.1);
  }
  66% {
    transform: translate(-20px, 20px) scale(0.9);
  }
}

/* ===================================
   Buttons
   =================================== */
.btn {
  display: inline-block;
  padding: 0.875rem 2rem;
  border-radius: var(--radius-full);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  transition: all var(--transition-base);
  cursor: pointer;
  border: none;
  font-size: 1rem;
  font-family: var(--font-family);
}

.btn-primary {
  background-color: var(--color-primary);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-text);
  border: 2px solid var(--color-border);
}

.btn-secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-2px);
}

/* ===================================
   Section Styles
   =================================== */
section {
  padding: var(--spacing-3xl) 0;
}

.section-title {
  font-size: 2.5rem;
  font-weight: var(--font-weight-bold);
  text-align: center;
  margin-bottom: var(--spacing-xl);
  color: var(--color-text);
}

/* ===================================
   About Section
   =================================== */
.about {
  background-color: var(--color-surface);
}

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

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

/* ===================================
   Skills Section
   =================================== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

.skill-category {
  background-color: var(--color-surface);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

.skill-category:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-5px);
}

.skill-category-title {
  font-size: 1.25rem;
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-md);
  color: var(--color-primary);
}

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

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

.skill-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.skill-name {
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
}

.skill-level {
  font-size: 0.875rem;
  color: var(--color-text-light);
}

.skill-bar {
  height: 8px;
  background-color: var(--color-border);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.skill-progress {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-dark));
  border-radius: var(--radius-full);
  transition: width 1s ease;
}

/* ===================================
   Projects Section
   =================================== */
.projects {
  background-color: var(--color-surface);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-lg);
}

.project-card {
  background-color: var(--color-background);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.project-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-xs);
}

.project-title {
  font-size: 1.5rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
}

.project-description {
  color: var(--color-text-light);
  line-height: 1.6;
  flex-grow: 1;
}

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

.tag {
  padding: 0.375rem 0.875rem;
  background-color: var(--color-primary);
  color: white;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
}

.project-link {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  transition: gap var(--transition-fast);
}

.project-link:hover {
  gap: var(--spacing-sm);
}

/* ===================================
   Education Section
   =================================== */
.education-content {
  max-width: 900px;
  margin: 0 auto;
}

.education-card {
  background-color: var(--color-surface);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: var(--spacing-lg);
}

.education-year {
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  font-size: 1.125rem;
}

.education-title {
  font-size: 1.5rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  margin-bottom: var(--spacing-xs);
}

.education-institution {
  font-size: 1.125rem;
  color: var(--color-text-light);
  margin-bottom: var(--spacing-sm);
}

.education-description {
  color: var(--color-text-light);
  line-height: 1.6;
}

/* ===================================
   Contact Section
   =================================== */
.contact {
  background-color: var(--color-surface);
}

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

.contact-intro {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--color-text-light);
  margin-bottom: var(--spacing-lg);
}

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

.social-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background-color: var(--color-background);
  border-radius: var(--radius-md);
  color: var(--color-text);
  text-decoration: none;
  transition: all var(--transition-base);
}

.social-link:hover {
  background-color: var(--color-primary);
  color: white;
  transform: translateX(8px);
}

.social-link svg {
  flex-shrink: 0;
}

.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-weight: var(--font-weight-medium);
  color: var(--color-text);
}

.form-group input,
.form-group textarea {
  padding: 0.875rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-family);
  font-size: 1rem;
  transition: border-color var(--transition-fast);
  background-color: var(--color-background);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.error-message {
  color: #ef4444;
  font-size: 0.875rem;
  display: none;
}

.error-message.show {
  display: block;
}

.form-success {
  padding: var(--spacing-md);
  background-color: #d1fae5;
  color: #065f46;
  border-radius: var(--radius-sm);
  display: none;
}

.form-success.show {
  display: block;
}

/* ===================================
   Footer
   =================================== */
.footer {
  background-color: var(--color-text);
  color: white;
  padding: var(--spacing-xl) 0;
}

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

.footer-text {
  color: rgba(255, 255, 255, 0.8);
}

.footer-social {
  display: flex;
  gap: var(--spacing-md);
}

.footer-social a {
  color: rgba(255, 255, 255, 0.8);
  transition: color var(--transition-fast);
}

.footer-social a:hover {
  color: white;
}

/* ===================================
   Animations
   =================================== */
.fade-in {
  opacity: 0;
  animation: fadeIn 1s ease forwards;
}

.fade-in:nth-child(1) {
  animation-delay: 0.1s;
}
.fade-in:nth-child(2) {
  animation-delay: 0.2s;
}
.fade-in:nth-child(3) {
  animation-delay: 0.3s;
}
.fade-in:nth-child(4) {
  animation-delay: 0.4s;
}

@keyframes fadeIn {
  to {
    opacity: 1;
  }
}

.scroll-reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease;
}

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

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 968px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

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

  .hero-buttons {
    justify-content: center;
  }

  .profile-photo {
    width: 300px;
    height: 300px;
  }

  .contact-content {
    grid-template-columns: 1fr;
  }

  .education-card {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background-color: var(--color-surface);
    flex-direction: column;
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-lg);
    transform: translateY(-100%);
    opacity: 0;
    transition: all var(--transition-base);
    pointer-events: none;
  }

  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
  }

  .mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .hero-subtitle {
    font-size: 1.25rem;
  }

  .section-title {
    font-size: 2rem;
  }

  .container {
    padding: 0 var(--spacing-md);
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }

  .hero-buttons {
    flex-direction: column;
    width: 100%;
  }

  .btn {
    width: 100%;
    text-align: center;
  }

  .profile-photo {
    width: 250px;
    height: 250px;
  }

  .projects-grid,
  .skills-grid {
    grid-template-columns: 1fr;
  }
}