/* ==========================================================================
   GLOBAL STYLES & LAYOUT SYSTEM (REFINED & BUG-FIXED)
   Mehedi Hasan - Premium 3D Portfolio
   ========================================================================== */

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

html {
  font-size: 16px;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

body {
  position: relative;
  min-height: 100vh;
  line-height: 1.6;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  overflow-x: hidden;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-cyan);
}

/* Neural Canvas & Background Noise Filter */
#neural-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -2;
  pointer-events: none;
  opacity: 0.55;
}

.noise-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  pointer-events: none;
  background-image: radial-gradient(rgba(0, 245, 255, 0.04) 1px, transparent 1px);
  background-size: 32px 32px;
  opacity: 0.5;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 2;
}

/* Section Shared Layout */
.section {
  padding: 120px 0;
  position: relative;
  z-index: 1;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 64px auto;
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background: rgba(0, 245, 255, 0.1);
  border: 1px solid rgba(0, 245, 255, 0.3);
  border-radius: var(--radius-full);
  color: var(--accent-cyan);
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 18px;
  backdrop-filter: var(--blur-glass);
}

.section-title {
  font-family: var(--font-heading);
  font-size: 3.25rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-title .gradient-text,
.gradient-text {
  background: var(--gradient-primary);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1.15rem;
  line-height: 1.7;
}

/* Glass Card Component */
.glass-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  padding: 32px;
  transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.glass-card:hover {
  border-color: var(--border-glass-hover);
  box-shadow: 0 16px 40px rgba(0, 245, 255, 0.15);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 30px;
  border-radius: var(--radius-full);
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  border: none;
  outline: none;
  position: relative;
  z-index: 2;
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-primary);
  color: #FFFFFF;
  box-shadow: 0 4px 20px rgba(0, 245, 255, 0.35);
}

.btn-primary:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 8px 30px rgba(0, 245, 255, 0.55);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
  border: 1px solid var(--border-glass);
  backdrop-filter: var(--blur-glass);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  transform: translateY(-3px);
}

.btn-outline {
  background: transparent;
  color: var(--accent-cyan);
  border: 1px solid var(--accent-cyan);
}

.btn-outline:hover {
  background: rgba(0, 245, 255, 0.12);
  box-shadow: var(--glow-cyan);
  transform: translateY(-3px);
}

/* ==========================================================================
   HEADER / NAVIGATION
   ========================================================================== */
.navbar {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 48px);
  max-width: var(--container-max-width);
  height: 68px;
  padding: 0 28px;
  background: rgba(10, 10, 14, 0.85);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-full);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  display: flex;
  align-items: center;
  justify-content: space-between;
  z-index: 1000;
  transition: all var(--transition-normal);
}

.navbar.scrolled {
  background: rgba(10, 10, 16, 0.95);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.8);
  border-color: rgba(0, 245, 255, 0.3);
}

.nav-brand {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-dot {
  width: 10px;
  height: 10px;
  background: var(--accent-cyan);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent-cyan);
  animation: pulseGlow 2s infinite ease-in-out;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  list-style: none;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.938rem;
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
}

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

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

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.theme-toggle-btn {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-glass);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
  color: var(--accent-cyan);
  border-color: var(--accent-cyan);
}

.mobile-menu-btn {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 4px;
}

/* Mobile Drawer Navigation */
.mobile-nav-drawer {
  position: fixed;
  top: 0;
  right: -100%;
  width: 320px;
  max-width: 85vw;
  height: 100vh;
  background: rgba(12, 12, 18, 0.98);
  border-left: 1px solid var(--border-glass);
  backdrop-filter: blur(24px);
  z-index: 2500;
  padding: 80px 32px 32px 32px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  transition: right 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: -10px 0 40px rgba(0, 0, 0, 0.8);
}

.mobile-nav-drawer.open {
  right: 0;
}

.mobile-nav-close {
  position: absolute;
  top: 24px;
  right: 24px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-glass);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  color: var(--text-primary);
  font-size: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.mobile-nav-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.mobile-nav-links a {
  color: var(--text-primary);
  font-family: var(--font-heading);
  font-size: 1.2rem;
  text-decoration: none;
  transition: color 0.3s;
}

.mobile-nav-links a:hover {
  color: var(--accent-cyan);
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 130px;
  padding-bottom: 60px;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 40px;
}

.hero-content {
  z-index: 2;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: rgba(157, 78, 221, 0.15);
  border: 1px solid rgba(157, 78, 221, 0.35);
  border-radius: var(--radius-full);
  color: #D8B4FE;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: 4rem;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.hero-subtitle {
  font-size: 1.35rem;
  color: var(--text-secondary);
  margin-bottom: 36px;
  min-height: 40px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.typing-text {
  color: var(--accent-cyan);
  font-weight: 600;
  border-right: 2px solid var(--accent-cyan);
  padding-right: 4px;
  animation: blink 0.75s infinite;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 32px;
  padding-top: 28px;
  border-top: 1px solid var(--border-glass);
}

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

.stat-number {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
}

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

/* 3D Spline Canvas Container */
.hero-spline-container {
  position: relative;
  width: 100%;
  height: 520px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
}

.hero-canvas-3d {
  width: 100%;
  height: 100%;
  border-radius: var(--radius-lg);
}

.spline-badge {
  position: absolute;
  bottom: 20px;
  right: 20px;
  background: rgba(10, 10, 16, 0.85);
  border: 1px solid var(--border-glass);
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  color: var(--text-secondary);
  backdrop-filter: var(--blur-glass);
  z-index: 3;
}

/* ==========================================================================
   ABOUT SECTION
   ========================================================================== */
.about-grid {
  display: grid;
  grid-template-columns: 420px 1fr;
  gap: 60px;
  align-items: center;
}

.about-image-wrapper {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  padding: 0;
}

.about-img {
  width: 100%;
  height: 480px;
  object-fit: cover;
  display: block;
  filter: grayscale(10%) contrast(105%);
  transition: transform var(--transition-smooth), filter var(--transition-normal);
}

.about-image-wrapper:hover .about-img {
  transform: scale(1.04);
  filter: grayscale(0%) contrast(100%);
}

.about-text h3 {
  font-family: var(--font-heading);
  font-size: 2.25rem;
  margin-bottom: 20px;
}

.about-bio {
  color: var(--text-secondary);
  font-size: 1.063rem;
  margin-bottom: 24px;
}

.about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 32px;
}

.feature-pill {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 18px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  font-size: 0.938rem;
  color: var(--text-primary);
}

.feature-icon {
  color: var(--accent-cyan);
  font-size: 1.25rem;
}

/* ==========================================================================
   SKILLS SECTION
   ========================================================================== */
.skills-filter-tabs {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.filter-btn {
  padding: 10px 24px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-glass);
  color: var(--text-secondary);
  font-family: var(--font-heading);
  font-size: 0.938rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--accent-cyan);
  color: #0A0A0E;
  border-color: var(--accent-cyan);
  box-shadow: var(--glow-cyan);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.skill-card {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 24px;
}

.skill-icon-box {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: rgba(0, 245, 255, 0.1);
  border: 1px solid rgba(0, 245, 255, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  font-size: 1.75rem;
  flex-shrink: 0;
}

.skill-info {
  flex-grow: 1;
}

.skill-name {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.skill-progress-bar {
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  overflow: hidden;
}

.skill-progress-fill {
  height: 100%;
  background: var(--gradient-primary);
  border-radius: 3px;
  width: 0%;
  transition: width 1.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.skill-percentage {
  font-size: 0.813rem;
  color: var(--text-muted);
  float: right;
  margin-top: 4px;
}

/* ==========================================================================
   SERVICES SECTION
   ========================================================================== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 32px;
}

.service-card {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.service-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-md);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  font-size: 1.75rem;
  margin-bottom: 24px;
  box-shadow: 0 8px 24px rgba(0, 245, 255, 0.25);
}

.service-title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.service-desc {
  color: var(--text-secondary);
  font-size: 0.938rem;
  margin-bottom: 24px;
  flex-grow: 1;
}

.service-features-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
}

.service-features-list li {
  font-size: 0.875rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 10px;
}

.service-features-list li i {
  color: var(--accent-cyan);
  font-size: 0.813rem;
}

/* ==========================================================================
   FEATURED PROJECTS SECTION
   ========================================================================== */
.projects-filter-bar {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 48px;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 36px;
}

.project-card {
  display: flex;
  flex-direction: column;
  padding: 0;
  overflow: hidden;
}

.project-thumb-wrapper {
  position: relative;
  width: 100%;
  height: 240px;
  overflow: hidden;
}

.project-thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.project-card:hover .project-thumb {
  transform: scale(1.08);
}

.project-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10, 10, 14, 0.95), transparent 70%);
  opacity: 0.8;
}

.project-body {
  padding: 28px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.project-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.tag-pill {
  padding: 4px 12px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-glass);
  font-size: 0.75rem;
  color: var(--accent-cyan);
  font-family: var(--font-heading);
}

.project-title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.project-desc {
  color: var(--text-secondary);
  font-size: 0.938rem;
  margin-bottom: 24px;
  flex-grow: 1;
}

.project-links {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: auto;
}

/* ==========================================================================
   PROCESS SECTION
   ========================================================================== */
.process-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}

.process-card {
  text-align: center;
  padding: 32px 20px;
}

.process-step-num {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  background: var(--gradient-primary);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 16px;
}

.process-card h4 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  margin-bottom: 10px;
}

.process-card p {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* ==========================================================================
   EXPERIENCE SECTION
   ========================================================================== */
.timeline-container {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  padding-left: 36px;
}

.timeline-container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 12px;
  height: 100%;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent-cyan), var(--accent-purple), transparent);
}

.timeline-item {
  position: relative;
  margin-bottom: 48px;
}

.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: -36px;
  top: 8px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 3px solid var(--accent-cyan);
  box-shadow: 0 0 12px var(--accent-cyan);
}

.timeline-card {
  padding: 28px;
}

.timeline-role {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.timeline-company {
  color: var(--accent-cyan);
  font-size: 0.938rem;
  font-weight: 600;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.timeline-period {
  color: var(--text-muted);
  font-size: 0.813rem;
  background: rgba(255, 255, 255, 0.06);
  padding: 2px 10px;
  border-radius: var(--radius-full);
}

.timeline-desc {
  color: var(--text-secondary);
  font-size: 0.938rem;
}

/* ==========================================================================
   TESTIMONIALS SECTION
   ========================================================================== */
.testimonials-slider {
  display: flex;
  gap: 32px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding: 20px 0;
  scrollbar-width: none;
}

.testimonials-slider::-webkit-scrollbar {
  display: none;
}

.testimonial-card {
  min-width: 340px;
  max-width: 420px;
  scroll-snap-align: start;
  flex-shrink: 0;
}

.testimonial-quote {
  font-size: 1rem;
  color: var(--text-secondary);
  font-style: italic;
  margin-bottom: 24px;
  line-height: 1.7;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 16px;
}

.author-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
  border: 1.5px solid var(--accent-cyan);
}

.author-name {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1rem;
}

.author-title {
  font-size: 0.813rem;
  color: var(--text-muted);
}

/* ==========================================================================
   CONTACT SECTION
   ========================================================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
  align-items: start;
}

.contact-info-box h3 {
  font-family: var(--font-heading);
  font-size: 2.25rem;
  margin-bottom: 16px;
}

.contact-info-box p {
  color: var(--text-secondary);
  font-size: 1.063rem;
  margin-bottom: 36px;
}

.contact-methods {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-method-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-glass);
  text-decoration: none;
  color: var(--text-primary);
  transition: all var(--transition-normal);
}

.contact-method-item:hover {
  background: rgba(0, 245, 255, 0.1);
  border-color: var(--accent-cyan);
  transform: translateX(6px);
}

.contact-method-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(0, 245, 255, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  font-size: 1.25rem;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-label {
  font-family: var(--font-heading);
  font-size: 0.938rem;
  font-weight: 500;
  color: var(--text-primary);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 14px 20px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 1rem;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 15px rgba(0, 245, 255, 0.25);
}

.budget-options {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.budget-btn {
  padding: 8px 18px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-glass);
  color: var(--text-secondary);
  font-size: 0.875rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.budget-btn.selected,
.budget-btn:hover {
  background: var(--accent-cyan);
  color: #0A0A0E;
  border-color: var(--accent-cyan);
  font-weight: 600;
}

/* ==========================================================================
   FOOTER & MODAL
   ========================================================================== */
.footer {
  padding: 60px 0 40px 0;
  border-top: 1px solid var(--border-glass);
  background: rgba(8, 8, 12, 0.9);
  position: relative;
  z-index: 1;
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
  margin-bottom: 40px;
}

.footer-socials {
  display: flex;
  align-items: center;
  gap: 16px;
}

.social-link {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-glass);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  text-decoration: none;
  transition: all var(--transition-normal);
}

.social-link:hover {
  background: var(--accent-cyan);
  color: #0A0A0E;
  transform: translateY(-4px);
  box-shadow: var(--glow-cyan);
}

.footer-bottom {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.875rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 24px;
}

.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--accent-cyan);
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 99;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-md);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--accent-cyan);
  color: #0A0A0E;
  transform: translateY(-4px);
  box-shadow: var(--glow-cyan);
}

/* Modal Window */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.88);
  backdrop-filter: blur(14px);
  z-index: 3000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-box {
  max-width: 680px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  transform: scale(0.9);
  transition: transform var(--transition-normal);
  background: rgba(14, 14, 20, 0.95);
  border: 1px solid var(--border-glass-hover);
}

.modal-overlay.active .modal-box {
  transform: scale(1);
}

.modal-close-btn {
  position: absolute;
  top: 20px;
  right: 20px;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 1.5rem;
  cursor: pointer;
}

.modal-close-btn:hover {
  color: var(--accent-cyan);
}

/* ==========================================================================
   LIGHT MODE COMPONENT & CONTRAST OVERRIDES
   ========================================================================== */

[data-theme="light"] #neural-canvas {
  opacity: 0.22;
}

[data-theme="light"] .noise-overlay {
  opacity: 0.15;
  background-image: radial-gradient(rgba(15, 23, 42, 0.05) 1px, transparent 1px);
}

[data-theme="light"] .navbar {
  background: rgba(255, 255, 255, 0.92);
  border-color: rgba(15, 23, 42, 0.12);
  box-shadow: 0 4px 20px rgba(15, 23, 42, 0.08);
}

[data-theme="light"] .navbar.scrolled {
  background: rgba(255, 255, 255, 0.98);
  border-color: rgba(2, 132, 199, 0.3);
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.12);
}

[data-theme="light"] .nav-brand {
  color: #0F172A;
}

[data-theme="light"] .nav-link {
  color: #475569;
}

[data-theme="light"] .nav-link:hover,
[data-theme="light"] .nav-link.active {
  color: #0284C7;
}

[data-theme="light"] .theme-toggle-btn {
  background: rgba(15, 23, 42, 0.06);
  border-color: rgba(15, 23, 42, 0.12);
  color: #0F172A;
}

[data-theme="light"] .theme-toggle-btn:hover {
  color: #0284C7;
  border-color: #0284C7;
}

[data-theme="light"] .mobile-nav-drawer {
  background: rgba(255, 255, 255, 0.98);
  border-left-color: rgba(15, 23, 42, 0.12);
  box-shadow: -10px 0 40px rgba(15, 23, 42, 0.15);
}

[data-theme="light"] .mobile-nav-links a {
  color: #0F172A;
}

[data-theme="light"] .mobile-nav-close {
  background: rgba(15, 23, 42, 0.06);
  border-color: rgba(15, 23, 42, 0.12);
  color: #0F172A;
}

[data-theme="light"] .hero-badge {
  background: rgba(126, 34, 206, 0.1);
  border-color: rgba(126, 34, 206, 0.25);
  color: #7E22CE;
}

[data-theme="light"] .hero-title {
  color: #0F172A;
}

[data-theme="light"] .hero-subtitle {
  color: #475569;
}

[data-theme="light"] .typing-text {
  color: #0284C7;
  border-right-color: #0284C7;
}

[data-theme="light"] .stat-number {
  color: #0F172A;
}

[data-theme="light"] .stat-label {
  color: #64748B;
}

[data-theme="light"] .hero-stats {
  border-top-color: rgba(15, 23, 42, 0.1);
}

[data-theme="light"] .spline-badge {
  background: rgba(255, 255, 255, 0.92);
  border-color: rgba(15, 23, 42, 0.15);
  color: #334155;
}

[data-theme="light"] .section-badge {
  background: rgba(2, 132, 199, 0.1);
  border-color: rgba(2, 132, 199, 0.25);
  color: #0284C7;
}

[data-theme="light"] .section-title {
  color: #0F172A;
}

[data-theme="light"] .section-subtitle {
  color: #475569;
}

[data-theme="light"] .glass-card {
  background: rgba(255, 255, 255, 0.92);
  border-color: rgba(15, 23, 42, 0.12);
  box-shadow: 0 4px 20px rgba(15, 23, 42, 0.05);
}

[data-theme="light"] .glass-card:hover {
  border-color: rgba(2, 132, 199, 0.5);
  box-shadow: 0 12px 36px rgba(2, 132, 199, 0.12);
}

[data-theme="light"] .btn-secondary {
  background: rgba(15, 23, 42, 0.05);
  color: #0F172A;
  border-color: rgba(15, 23, 42, 0.15);
}

[data-theme="light"] .btn-secondary:hover {
  background: rgba(15, 23, 42, 0.1);
  border-color: #0284C7;
  color: #0284C7;
}

[data-theme="light"] .btn-outline {
  color: #0284C7;
  border-color: #0284C7;
}

[data-theme="light"] .btn-outline:hover {
  background: rgba(2, 132, 199, 0.1);
  box-shadow: 0 0 20px rgba(2, 132, 199, 0.25);
}

[data-theme="light"] .feature-pill {
  background: rgba(15, 23, 42, 0.04);
  border-color: rgba(15, 23, 42, 0.1);
  color: #0F172A;
}

[data-theme="light"] .feature-icon {
  color: #0284C7;
}

[data-theme="light"] .filter-btn {
  background: rgba(15, 23, 42, 0.05);
  border-color: rgba(15, 23, 42, 0.12);
  color: #475569;
}

[data-theme="light"] .filter-btn:hover,
[data-theme="light"] .filter-btn.active {
  background: #0284C7;
  color: #FFFFFF;
  border-color: #0284C7;
  box-shadow: 0 4px 16px rgba(2, 132, 199, 0.35);
}

[data-theme="light"] .skill-icon-box {
  background: rgba(2, 132, 199, 0.1);
  border-color: rgba(2, 132, 199, 0.25);
  color: #0284C7;
}

[data-theme="light"] .skill-name {
  color: #0F172A;
}

[data-theme="light"] .skill-progress-bar {
  background: rgba(15, 23, 42, 0.1);
}

[data-theme="light"] .skill-percentage {
  color: #64748B;
}

[data-theme="light"] .service-title {
  color: #0F172A;
}

[data-theme="light"] .service-desc {
  color: #475569;
}

[data-theme="light"] .service-features-list li {
  color: #334155;
}

[data-theme="light"] .tag-pill {
  background: rgba(2, 132, 199, 0.1);
  border-color: rgba(2, 132, 199, 0.25);
  color: #0284C7;
}

[data-theme="light"] .project-title {
  color: #0F172A;
}

[data-theme="light"] .project-desc {
  color: #475569;
}

[data-theme="light"] .process-card h4 {
  color: #0F172A;
}

[data-theme="light"] .process-card p {
  color: #475569;
}

[data-theme="light"] .timeline-container::before {
  background: linear-gradient(to bottom, #0284C7, #7E22CE, transparent);
}

[data-theme="light"] .timeline-dot {
  background: #FFFFFF;
  border-color: #0284C7;
  box-shadow: 0 0 10px rgba(2, 132, 199, 0.4);
}

[data-theme="light"] .timeline-role {
  color: #0F172A;
}

[data-theme="light"] .timeline-company {
  color: #0284C7;
}

[data-theme="light"] .timeline-period {
  background: rgba(15, 23, 42, 0.06);
  color: #475569;
}

[data-theme="light"] .timeline-desc {
  color: #334155;
}

[data-theme="light"] .testimonial-quote {
  color: #334155;
}

[data-theme="light"] .author-name {
  color: #0F172A;
}

[data-theme="light"] .author-title {
  color: #64748B;
}

[data-theme="light"] .contact-info-box h3 {
  color: #0F172A;
}

[data-theme="light"] .contact-info-box p {
  color: #475569;
}

[data-theme="light"] .contact-method-item {
  background: rgba(255, 255, 255, 0.95);
  border-color: rgba(15, 23, 42, 0.12);
  color: #0F172A;
}

[data-theme="light"] .contact-method-item:hover {
  background: rgba(2, 132, 199, 0.08);
  border-color: #0284C7;
}

[data-theme="light"] .contact-method-icon {
  background: rgba(2, 132, 199, 0.12);
  color: #0284C7;
}

[data-theme="light"] .form-label {
  color: #0F172A;
}

[data-theme="light"] .form-input,
[data-theme="light"] .form-textarea {
  background: #FFFFFF;
  border-color: rgba(15, 23, 42, 0.18);
  color: #0F172A;
}

[data-theme="light"] .form-input:focus,
[data-theme="light"] .form-textarea:focus {
  border-color: #0284C7;
  box-shadow: 0 0 15px rgba(2, 132, 199, 0.2);
}

[data-theme="light"] .budget-btn {
  background: rgba(15, 23, 42, 0.05);
  border-color: rgba(15, 23, 42, 0.12);
  color: #475569;
}

[data-theme="light"] .budget-btn.selected,
[data-theme="light"] .budget-btn:hover {
  background: #0284C7;
  color: #FFFFFF;
  border-color: #0284C7;
}

[data-theme="light"] .footer {
  background: #E2E8F0;
  border-top-color: rgba(15, 23, 42, 0.12);
}

[data-theme="light"] .social-link {
  background: #FFFFFF;
  border-color: rgba(15, 23, 42, 0.15);
  color: #0F172A;
}

[data-theme="light"] .social-link:hover {
  background: #0284C7;
  color: #FFFFFF;
  box-shadow: 0 4px 16px rgba(2, 132, 199, 0.3);
}

[data-theme="light"] .footer-bottom {
  color: #64748B;
  border-top-color: rgba(15, 23, 42, 0.08);
}

[data-theme="light"] .back-to-top {
  background: #FFFFFF;
  border-color: #0284C7;
  color: #0284C7;
  box-shadow: 0 4px 20px rgba(15, 23, 42, 0.1);
}

[data-theme="light"] .back-to-top:hover {
  background: #0284C7;
  color: #FFFFFF;
}

[data-theme="light"] .modal-box {
  background: #FFFFFF;
  color: #0F172A;
  border-color: rgba(15, 23, 42, 0.15);
}

[data-theme="light"] .modal-title {
  color: #0F172A;
}

[data-theme="light"] .modal-desc {
  color: #475569;
}