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

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

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

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border-radius: 5px;
  border: 2px solid var(--bg-primary);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-primary);
}

/* Typography Utility Classes */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-primary);
}

.text-gradient {
  background: linear-gradient(135deg, var(--accent-primary) 0%, var(--secondary-color) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.section-heading {
  font-size: 2.75rem;
  margin-bottom: 0.75rem;
  text-align: center;
}

.section-subheading {
  color: var(--text-secondary);
  text-align: center;
  max-width: 650px;
  margin: 0 auto 3.5rem auto;
  font-size: 1.15rem;
}

.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Glassmorphism Cards */
.glass-card {
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--border-radius-lg);
  padding: 2.25rem;
  box-shadow: var(--card-shadow);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
}

.glass-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--card-shadow-hover);
  border-color: var(--accent-primary);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.85rem;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.05rem;
  border-radius: var(--border-radius-full);
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-normal);
  border: 2px solid transparent;
}

.btn-primary {
  background: var(--accent-primary);
  color: var(--text-inverse);
  box-shadow: 0 4px 15px var(--accent-glow);
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px var(--accent-glow);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--bg-glass-border);
}

.btn-secondary:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  background: rgba(255, 204, 0, 0.05);
}

/* Badges */
.badge {
  display: inline-block;
  padding: 0.4rem 0.95rem;
  border-radius: var(--border-radius-full);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  background: rgba(255, 204, 0, 0.14);
  color: var(--accent-primary);
  border: 1px solid rgba(255, 204, 0, 0.35);
  margin-bottom: 1rem;
}

/* Navigation Header */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 80px;
  display: flex;
  align-items: center;
  z-index: 1000;
  transition: all var(--transition-normal);
  background: transparent;
}

.navbar.scrolled {
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--bg-glass-border);
  box-shadow: var(--nav-shadow);
  height: 70px;
}

.nav-container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.badge-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--border-radius-md);
  background: var(--accent-primary);
  color: var(--text-inverse);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.25rem;
  box-shadow: 0 4px 12px var(--accent-glow);
}

.brand-text {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--text-primary);
}

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

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.98rem;
  transition: color var(--transition-fast);
  position: relative;
}

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

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

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

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

.theme-toggle-btn {
  background: var(--bg-tertiary);
  border: 1px solid var(--bg-glass-border);
  color: var(--text-primary);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.theme-toggle-btn:hover {
  background: var(--accent-primary);
  color: var(--text-inverse);
  transform: rotate(15deg) scale(1.08);
}

/* Hamburger Menu */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 5px;
}

.hamburger span {
  width: 26px;
  height: 3px;
  background: var(--text-primary);
  border-radius: 3px;
  transition: all var(--transition-normal);
}

/* Sections Base Padding */
section {
  padding: 6.5rem 0;
  position: relative;
  z-index: 10;
}

/* Scroll Reveal Animations */
.reveal {
  opacity: 0;
  transform: translateY(35px);
  transition: opacity 0.75s cubic-bezier(0.4, 0, 0.2, 1), transform 0.75s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* Floating & Glow Keyframes */
@keyframes float {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-14px);
  }
}

@keyframes pulseGlow {
  0%, 100% {
    box-shadow: 0 0 25px var(--accent-glow);
  }
  50% {
    box-shadow: 0 0 55px rgba(255, 204, 0, 0.55);
  }
}

/* ==================== HERO SECTION (`TASK-7.2`, `TASK-7.4`) ==================== */
.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 80px;
  position: relative;
  overflow: hidden;
}

.hero-canvas-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  opacity: 0.85;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 4rem;
  width: 100%;
}

.hero-title {
  font-size: 3.85rem;
  line-height: 1.12;
  margin: 0.75rem 0;
}

.hero-subtitle {
  font-size: 1.4rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: 1.5rem;
}

.hero-description {
  font-size: 1.12rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin-bottom: 2.25rem;
}

.hero-buttons {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
}

/* Right Column: Golden Avatar (`TASK-7.4`) */
.hero-avatar-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.golden-avatar-card {
  position: relative;
  width: 380px;
  height: 380px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.avatar-backdrop-glow {
  position: absolute;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  background: var(--avatar-bg);
  filter: blur(65px);
  opacity: 0.45;
  animation: pulseGlow 4s infinite ease-in-out;
  z-index: 1;
}

.avatar-golden-circle {
  position: relative;
  width: 330px;
  height: 330px;
  border-radius: 50%;
  background: var(--avatar-bg);
  border: 6px solid var(--bg-secondary);
  box-shadow: 0 15px 45px rgba(255, 204, 0, 0.4);
  overflow: hidden;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: float 5s infinite ease-in-out;
}

.profile-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  transition: transform var(--transition-slow);
}

.golden-avatar-card:hover .profile-photo {
  transform: scale(1.08);
}

.avatar-badge-floating {
  position: absolute;
  z-index: 3;
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  border: 1px solid var(--accent-primary);
  padding: 0.6rem 1.1rem;
  border-radius: var(--border-radius-full);
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--text-primary);
  box-shadow: var(--card-shadow);
  white-space: nowrap;
}

.badge-1 {
  top: 18%;
  left: -20px;
  animation: float 4.5s infinite ease-in-out 0.5s;
}

.badge-2 {
  bottom: 18%;
  right: -20px;
  animation: float 5s infinite ease-in-out 1s;
}

/* ==================== ABOUT SECTION (`TASK-8.1`) ==================== */
.about-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.6fr;
  gap: 2.5rem;
  align-items: center;
}

.about-stats-col {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.stat-card {
  text-align: center;
  padding: 1.75rem !important;
}

.stat-number {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-weight: 600;
}

/* ==================== EXPERIENCE TIMELINE (`TASK-8.2`) ==================== */
.timeline {
  position: relative;
  max-width: 950px;
  margin: 0 auto;
  padding-left: 2.5rem;
  border-left: 3px solid var(--bg-glass-border);
}

.timeline-item {
  position: relative;
  margin-bottom: 3rem;
}

.timeline-dot {
  position: absolute;
  left: -2.5rem;
  top: 1.5rem;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent-primary);
  border: 4px solid var(--bg-primary);
  box-shadow: 0 0 12px var(--accent-glow);
  transform: translateX(-50%);
}

.academic-dot {
  background: var(--secondary-color);
  box-shadow: 0 0 12px rgba(56, 189, 248, 0.4);
}

.timeline-card h3 {
  font-size: 1.45rem;
  margin: 0.3rem 0;
}

.timeline-card h4 {
  font-size: 1.05rem;
  color: var(--accent-primary);
  margin-bottom: 1rem;
  font-weight: 600;
}

.academic-card h4 {
  color: var(--secondary-color);
}

.timeline-bullets {
  padding-left: 1.25rem;
  color: var(--text-secondary);
}

.timeline-bullets li {
  margin-bottom: 0.6rem;
}

/* ==================== PROJECTS GRID & MODAL (`TASK-8.3`) ==================== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 2rem;
}

.project-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.project-card h3 {
  font-size: 1.35rem;
  margin-bottom: 0.75rem;
}

.project-card p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.project-roi {
  background: rgba(255, 204, 0, 0.1);
  border-left: 4px solid var(--accent-primary);
  padding: 0.75rem 1rem;
  border-radius: var(--border-radius-sm);
  font-weight: 700;
  color: var(--accent-primary);
  margin-bottom: 1.5rem;
  font-size: 0.95rem;
}

/* Modal Overlay */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  z-index: 3000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  position: relative;
  max-width: 650px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
}

.modal-close {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  background: transparent;
  border: none;
  font-size: 1.5rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: color var(--transition-fast);
}

.modal-close:hover {
  color: var(--error-color);
}

/* ==================== SKILLS GRID (`TASK-8.4`) ==================== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.skill-category h3 {
  font-size: 1.35rem;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--bg-glass-border);
}

.badges-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.badges-wrap .badge {
  margin-bottom: 0;
}

/* ==================== CONTACT SECTION (`TASK-8.5`) ==================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 3rem;
}

.contact-status.success {
  color: var(--success-color);
}

.contact-status.error {
  color: var(--error-color);
}

/* ==================== RESPONSIVE MEDIA QUERIES ==================== */
@media (max-width: 992px) {
  .hero-grid, .about-grid, .contact-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

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

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

  .hero-title {
    font-size: 2.85rem;
  }

  .timeline {
    padding-left: 1.5rem;
  }

  .timeline-dot {
    left: -1.5rem;
  }
}

@media (max-width: 600px) {
  .hero-title {
    font-size: 2.35rem;
  }

  .golden-avatar-card {
    width: 280px;
    height: 280px;
  }

  .avatar-golden-circle, .avatar-backdrop-glow {
    width: 250px;
    height: 250px;
  }

  .badge-1, .badge-2 {
    font-size: 0.78rem;
    padding: 0.4rem 0.8rem;
  }

  .section-heading {
    font-size: 2.1rem;
  }
}