/* =============================================
   NexaAI Studio — style.css
   Premium UI with glassmorphism & gradients
   ============================================= */

/* --- Google Fonts & Variables --- */
@import url('https://fonts.googleapis.com/css2?family=Sora:wght@300;400;600;700;800&family=Inter:wght@300;400;500;600&display=swap');

:root {
  --navy:        #0A0F1E;
  --navy-mid:    #111827;
  --navy-light:  #1E293B;
  --violet:      #7C3AED;
  --violet-dark: #5B21B6;
  --cyan:        #06B6D4;
  --pearl:       #F8FAFC;
  --slate:       #94A3B8;
  --slate-light: #CBD5E1;
  --glass-bg:    rgba(255,255,255,0.05);
  --glass-border:rgba(255,255,255,0.10);
  --radius:      16px;
  --transition:  0.35s cubic-bezier(0.4, 0, 0.2, 1);

  /* Light mode overrides applied via class */
  --bg:          var(--navy);
  --surface:     var(--navy-mid);
  --text-primary:#F8FAFC;
  --text-muted:  #94A3B8;
  --card-bg:     var(--glass-bg);
  --card-border: var(--glass-border);
}

body.light-mode {
  --bg:          #F0F4FF;
  --surface:     #FFFFFF;
  --text-primary:#0A0F1E;
  --text-muted:  #475569;
  --card-bg:     rgba(255,255,255,0.85);
  --card-border: rgba(124,58,237,0.15);
  --glass-bg:    rgba(255,255,255,0.75);
  --glass-border:rgba(124,58,237,0.12);
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

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

/* --- Typography --- */
h1,h2,h3,h4,h5,h6 {
  font-family: 'Sora', sans-serif;
  font-weight: 700;
  line-height: 1.2;
}

.gradient-text {
  background: linear-gradient(135deg, var(--violet) 0%, var(--cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* --- Page Loader --- */
#page-loader {
  position: fixed; inset: 0;
  background: var(--navy);
  display: flex; align-items: center; justify-content: center;
  z-index: 9999;
  transition: opacity 0.6s ease, visibility 0.6s ease;
}
#page-loader.hidden { opacity: 0; visibility: hidden; }

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

.loader-ring {
  width: 60px; height: 60px;
  border: 3px solid rgba(124,58,237,0.2);
  border-top-color: var(--violet);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
  margin: 0 auto 16px;
}
@keyframes spin { to { transform: rotate(360deg); } }

.loader-text {
  font-family: 'Sora', sans-serif;
  font-size: 0.85rem;
  color: var(--slate);
  letter-spacing: 3px;
  text-transform: uppercase;
}

/* --- Navbar --- */
#mainNav {
  background: rgba(10,15,30,0.72);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  transition: all var(--transition);
  padding: 14px 0;
}
body.light-mode #mainNav {
  background: rgba(240,244,255,0.82);
}
#mainNav.scrolled {
  padding: 8px 0;
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
}

.navbar-brand {
  font-family: 'Sora', sans-serif;
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.nav-link {
  color: var(--slate-light) !important;
  font-size: 0.875rem;
  font-weight: 500;
  padding: 6px 14px !important;
  border-radius: 8px;
  transition: all var(--transition);
  position: relative;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 2px; left: 50%; right: 50%;
  height: 2px;
  background: linear-gradient(90deg, var(--violet), var(--cyan));
  border-radius: 2px;
  transition: all var(--transition);
}
.nav-link:hover { color: var(--pearl) !important; }
.nav-link:hover::after { left: 14px; right: 14px; }

.nav-btn {
  background: linear-gradient(135deg, var(--violet), var(--cyan));
  color: #fff !important;
  border-radius: 30px !important;
  padding: 8px 22px !important;
  font-weight: 600;
  font-size: 0.85rem;
}
.nav-btn::after { display: none; }
.nav-btn:hover { opacity: 0.85; transform: translateY(-1px); color: #fff !important; }

/* Dark/Light toggle */
#themeToggle {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 50px;
  padding: 6px 14px;
  color: var(--text-primary);
  cursor: pointer;
  font-size: 0.85rem;
  transition: all var(--transition);
  display: flex; align-items: center; gap: 6px;
}
#themeToggle:hover { background: rgba(124,58,237,0.2); border-color: var(--violet); }

/* --- Hero --- */
#hero {
  min-height: 100vh;
  display: flex; align-items: center;
  position: relative;
  overflow: hidden;
  padding: 120px 0 80px;
}

#neural-canvas {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  opacity: 0.35;
}
body.light-mode #neural-canvas { opacity: 0.12; }

.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(124,58,237,0.15);
  border: 1px solid rgba(124,58,237,0.35);
  border-radius: 50px;
  padding: 6px 16px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--violet);
  letter-spacing: 0.5px;
  margin-bottom: 20px;
  animation: fadeInUp 0.6s ease both;
}
.hero-badge .dot {
  width: 7px; height: 7px;
  background: var(--cyan);
  border-radius: 50%;
  animation: pulse-dot 2s infinite;
}
@keyframes pulse-dot {
  0%,100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.7); }
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 5.5rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -1.5px;
  animation: fadeInUp 0.6s 0.1s ease both;
}
.hero-subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 520px;
  margin: 20px 0 36px;
  animation: fadeInUp 0.6s 0.2s ease both;
}
.hero-actions { animation: fadeInUp 0.6s 0.3s ease both; }

.btn-primary-glow {
  background: linear-gradient(135deg, var(--violet), var(--cyan));
  border: none; color: #fff;
  padding: 14px 34px;
  border-radius: 50px;
  font-weight: 700; font-size: 0.95rem;
  box-shadow: 0 0 30px rgba(124,58,237,0.45);
  transition: all var(--transition);
  cursor: pointer;
}
.btn-primary-glow:hover {
  transform: translateY(-3px);
  box-shadow: 0 0 50px rgba(124,58,237,0.65);
  color: #fff;
}

.btn-ghost {
  background: transparent;
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  padding: 14px 34px;
  border-radius: 50px;
  font-weight: 600; font-size: 0.95rem;
  transition: all var(--transition);
  cursor: pointer;
}
.btn-ghost:hover {
  border-color: var(--violet);
  background: rgba(124,58,237,0.1);
  color: var(--text-primary);
}

.hero-stats {
  display: flex; gap: 32px; margin-top: 48px;
  animation: fadeInUp 0.6s 0.4s ease both;
}
.hero-stat-num {
  font-family: 'Sora', sans-serif;
  font-size: 1.75rem; font-weight: 800;
}
.hero-stat-label { font-size: 0.78rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; }

.hero-visual {
  position: relative;
  animation: fadeInRight 0.8s 0.2s ease both;
}
.hero-card-float {
  background: var(--card-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 20px 24px;
  position: absolute;
}
.hero-card-float.card-a {
  top: 8%; right: -10%;
  animation: float 4s ease-in-out infinite;
}
.hero-card-float.card-b {
  bottom: 10%; left: -8%;
  animation: float 4s 2s ease-in-out infinite;
}
@keyframes float {
  0%,100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.hero-img-wrap {
  border-radius: 20px;
  overflow: hidden;
  position: relative;
  box-shadow: 0 40px 80px rgba(0,0,0,0.5);
}
.hero-img-wrap img { width: 100%; display: block; }
.hero-img-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(124,58,237,0.3), rgba(6,182,212,0.2));
}

/* --- Section Commons --- */
.section-pad { padding: 100px 0; }

.section-eyebrow {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 12px;
}
.section-title { font-size: clamp(1.8rem, 3.5vw, 2.8rem); margin-bottom: 16px; }
.section-desc { color: var(--text-muted); max-width: 560px; font-size: 1rem; }

/* --- Glass Card --- */
.glass-card {
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  transition: all var(--transition);
  overflow: hidden;
}
.glass-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 60px rgba(124,58,237,0.2);
  border-color: rgba(124,58,237,0.3);
}

/* --- About --- */
#about { background: var(--surface); position: relative; overflow: hidden; }
#about::before {
  content: '';
  position: absolute; top: -100px; right: -100px;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(124,58,237,0.12) 0%, transparent 70%);
  pointer-events: none;
}

.about-img-wrap {
  position: relative; border-radius: 20px; overflow: hidden;
}
.about-img-wrap img { width: 100%; border-radius: 20px; }
.about-badge-float {
  position: absolute; bottom: -20px; right: -20px;
  background: linear-gradient(135deg, var(--violet), var(--cyan));
  color: #fff; border-radius: 16px;
  padding: 20px 24px;
  font-family: 'Sora', sans-serif;
  font-weight: 800; font-size: 2rem;
  text-align: center;
  box-shadow: 0 16px 40px rgba(124,58,237,0.5);
}
.about-badge-float span { display: block; font-size: 0.7rem; font-weight: 500; opacity: 0.85; }

.skill-bar { margin-bottom: 20px; }
.skill-label { display: flex; justify-content: space-between; font-size: 0.85rem; margin-bottom: 6px; color: var(--text-muted); }
.skill-track {
  height: 6px; background: rgba(255,255,255,0.08);
  border-radius: 6px; overflow: hidden;
}
.skill-fill {
  height: 100%; border-radius: 6px;
  background: linear-gradient(90deg, var(--violet), var(--cyan));
  width: 0; transition: width 1.4s cubic-bezier(0.4,0,0.2,1);
}

/* --- Services --- */
#services { position: relative; }

.service-icon {
  width: 56px; height: 56px;
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 20px;
}

/* --- Stats Counter --- */
#stats {
  background: linear-gradient(135deg, var(--violet-dark) 0%, var(--navy-mid) 100%);
  position: relative; overflow: hidden;
}
#stats::after {
  content: '';
  position: absolute; inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.stat-card {
  text-align: center; padding: 40px 24px;
  position: relative; z-index: 1;
}
.stat-number {
  font-family: 'Sora', sans-serif;
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  color: #fff;
  line-height: 1;
}
.stat-suffix { color: var(--cyan); }
.stat-label {
  color: rgba(255,255,255,0.65);
  font-size: 0.9rem; margin-top: 8px;
  text-transform: uppercase; letter-spacing: 1.5px;
}

/* --- Portfolio --- */
#portfolio { background: var(--surface); }

.filter-nav { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 40px; }
.filter-btn {
  padding: 8px 22px; border-radius: 50px;
  border: 1px solid var(--glass-border);
  background: transparent; color: var(--text-muted);
  font-size: 0.85rem; font-weight: 500;
  cursor: pointer; transition: all var(--transition);
}
.filter-btn.active,
.filter-btn:hover {
  background: linear-gradient(135deg, var(--violet), var(--cyan));
  border-color: transparent; color: #fff;
}

.portfolio-item { border-radius: var(--radius); overflow: hidden; position: relative; }
.portfolio-item img { width: 100%; aspect-ratio: 4/3; object-fit: cover; transition: transform 0.5s ease; display: block; }
.portfolio-item:hover img { transform: scale(1.06); }
.portfolio-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(10,15,30,0.95) 0%, transparent 50%);
  display: flex; flex-direction: column; justify-content: flex-end;
  padding: 24px; opacity: 0;
  transition: opacity var(--transition);
}
.portfolio-item:hover .portfolio-overlay { opacity: 1; }
.portfolio-overlay h5 { color: #fff; font-size: 1.1rem; margin-bottom: 6px; }
.portfolio-overlay p { color: var(--slate); font-size: 0.82rem; margin: 0; }
.portfolio-tag {
  position: absolute; top: 14px; left: 14px;
  background: linear-gradient(135deg, var(--violet), var(--cyan));
  color: #fff; border-radius: 6px;
  font-size: 0.72rem; font-weight: 700;
  padding: 4px 10px; text-transform: uppercase; letter-spacing: 0.5px;
}

/* --- Testimonials --- */
#testimonials { position: relative; overflow: hidden; }
#testimonials::before {
  content: '';
  position: absolute; bottom: -150px; left: -150px;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(6,182,212,0.1) 0%, transparent 70%);
}

.testimonial-card { padding: 36px; text-align: left; }
.testimonial-quote { font-size: 3rem; line-height: 1; color: var(--violet); font-family: 'Sora', sans-serif; margin-bottom: 16px; }
.testimonial-text { font-size: 1rem; color: var(--text-muted); margin-bottom: 24px; line-height: 1.7; }
.testimonial-author { display: flex; align-items: center; gap: 14px; }
.testimonial-avatar {
  width: 48px; height: 48px; border-radius: 50%;
  border: 2px solid var(--violet); object-fit: cover;
}
.testimonial-name { font-weight: 700; font-size: 0.95rem; }
.testimonial-role { font-size: 0.78rem; color: var(--slate); }
.star-rating { color: #F59E0B; font-size: 0.85rem; margin-bottom: 16px; }

.carousel-control-prev, .carousel-control-next {
  width: 46px; height: 46px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 50%;
  top: auto; bottom: -70px;
  opacity: 1;
  transition: all var(--transition);
}
.carousel-control-prev { left: auto; right: 60px; }
.carousel-control-next { right: 0; }
.carousel-control-prev:hover, .carousel-control-next:hover {
  background: linear-gradient(135deg, var(--violet), var(--cyan));
  border-color: transparent;
}

/* --- Blog --- */
#blog { background: var(--surface); }

.blog-card .blog-img {
  height: 200px; object-fit: cover; width: 100%;
  transition: transform 0.5s ease;
}
.blog-card:hover .blog-img { transform: scale(1.04); }
.blog-card-body { padding: 24px; }
.blog-tag {
  display: inline-block;
  background: rgba(124,58,237,0.15); color: var(--violet);
  border-radius: 50px; font-size: 0.72rem; font-weight: 700;
  padding: 4px 12px; letter-spacing: 0.5px;
  margin-bottom: 12px; text-transform: uppercase;
}
.blog-title { font-size: 1.05rem; font-weight: 700; margin-bottom: 10px; line-height: 1.4; }
.blog-meta { font-size: 0.78rem; color: var(--slate); }
.blog-read-more {
  color: var(--violet); font-size: 0.85rem; font-weight: 600;
  text-decoration: none;
  display: inline-flex; align-items: center; gap: 6px;
  margin-top: 14px; transition: gap var(--transition);
}
.blog-read-more:hover { gap: 10px; color: var(--cyan); }

/* --- Search Bar --- */
.search-wrap { position: relative; max-width: 560px; }
.search-input {
  width: 100%;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 50px;
  padding: 14px 56px 14px 22px;
  color: var(--text-primary);
  font-size: 0.9rem;
  transition: all var(--transition);
  outline: none;
  backdrop-filter: blur(16px);
}
.search-input:focus { border-color: var(--violet); box-shadow: 0 0 0 4px rgba(124,58,237,0.15); }
.search-input::placeholder { color: var(--slate); }
.search-icon {
  position: absolute; right: 18px; top: 50%;
  transform: translateY(-50%);
  color: var(--slate); font-size: 1rem;
}
.search-suggestions {
  position: absolute; top: calc(100% + 8px);
  left: 0; right: 0;
  background: var(--surface);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
  display: none; z-index: 100;
}
.search-suggestions.active { display: block; }
.suggestion-item {
  padding: 12px 20px;
  font-size: 0.88rem; color: var(--text-muted);
  cursor: pointer; transition: background var(--transition);
  display: flex; align-items: center; gap: 10px;
}
.suggestion-item:hover { background: rgba(124,58,237,0.1); color: var(--text-primary); }

/* --- FAQ --- */
#faq { background: var(--surface); }

.faq-item {
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
  transition: all var(--transition);
}
.faq-item.open { border-color: var(--violet); }
.faq-question {
  width: 100%; background: none; border: none;
  padding: 20px 24px;
  display: flex; justify-content: space-between; align-items: center;
  color: var(--text-primary);
  font-family: 'Sora', sans-serif;
  font-weight: 600; font-size: 0.95rem;
  text-align: left; cursor: pointer;
  transition: all var(--transition);
}
.faq-question:hover { color: var(--violet); }
.faq-chevron {
  font-size: 0.85rem; color: var(--slate);
  transition: transform var(--transition);
  flex-shrink: 0; margin-left: 16px;
}
.faq-item.open .faq-chevron { transform: rotate(180deg); color: var(--violet); }
.faq-answer {
  padding: 0 24px; max-height: 0; overflow: hidden;
  color: var(--text-muted); font-size: 0.9rem; line-height: 1.7;
  transition: max-height 0.4s ease, padding 0.4s ease;
}
.faq-item.open .faq-answer { max-height: 300px; padding: 0 24px 20px; }

/* --- Contact --- */
#contact { position: relative; overflow: hidden; }
#contact::before {
  content: '';
  position: absolute; top: -200px; left: -200px;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(124,58,237,0.1) 0%, transparent 70%);
}

.contact-form-wrap {
  background: var(--card-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--card-border);
  border-radius: 24px;
  padding: 48px;
}
.form-group { margin-bottom: 20px; }
.form-label { font-size: 0.82rem; font-weight: 600; color: var(--text-muted); margin-bottom: 6px; display: block; text-transform: uppercase; letter-spacing: 0.5px; }
.form-control-custom {
  width: 100%;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  padding: 14px 18px;
  color: var(--text-primary);
  font-size: 0.9rem; font-family: 'Inter', sans-serif;
  transition: all var(--transition); outline: none;
}
body.light-mode .form-control-custom { background: rgba(0,0,0,0.04); }
.form-control-custom:focus { border-color: var(--violet); box-shadow: 0 0 0 4px rgba(124,58,237,0.15); }
.form-control-custom.error { border-color: #EF4444; }
.form-error { font-size: 0.78rem; color: #EF4444; margin-top: 4px; display: none; }
.form-error.show { display: block; }
textarea.form-control-custom { resize: vertical; min-height: 130px; }

.form-success {
  display: none;
  background: rgba(16,185,129,0.15);
  border: 1px solid rgba(16,185,129,0.3);
  border-radius: 12px; padding: 16px 20px;
  color: #10B981; font-weight: 600;
  margin-top: 16px;
}
.form-success.show { display: flex; align-items: center; gap: 10px; }

/* --- Newsletter --- */
.newsletter-wrap {
  background: linear-gradient(135deg, rgba(124,58,237,0.2), rgba(6,182,212,0.1));
  border: 1px solid rgba(124,58,237,0.25);
  border-radius: 20px;
  padding: 48px;
  text-align: center;
}
.newsletter-input-group { display: flex; gap: 12px; max-width: 480px; margin: 24px auto 0; }
.newsletter-input {
  flex: 1; background: rgba(255,255,255,0.08);
  border: 1px solid var(--glass-border);
  border-radius: 50px; padding: 14px 22px;
  color: var(--text-primary); font-size: 0.9rem; outline: none;
  transition: all var(--transition);
}
.newsletter-input:focus { border-color: var(--violet); }

/* --- Footer --- */
#footer {
  background: var(--navy-mid);
  border-top: 1px solid var(--glass-border);
  padding: 70px 0 30px;
}
body.light-mode #footer { background: #1E293B; }

.footer-brand { font-family: 'Sora', sans-serif; font-weight: 800; font-size: 1.3rem; margin-bottom: 12px; }
.footer-desc { color: var(--slate); font-size: 0.88rem; max-width: 260px; }
.footer-heading { font-size: 0.78rem; font-weight: 700; text-transform: uppercase; letter-spacing: 2px; color: var(--slate); margin-bottom: 16px; }
.footer-link { display: block; color: var(--slate); font-size: 0.88rem; text-decoration: none; margin-bottom: 10px; transition: color var(--transition); }
.footer-link:hover { color: var(--violet); }
.social-links { display: flex; gap: 10px; margin-top: 20px; }
.social-btn {
  width: 38px; height: 38px; border-radius: 10px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  display: flex; align-items: center; justify-content: center;
  color: var(--slate); font-size: 0.9rem;
  text-decoration: none;
  transition: all var(--transition);
}
.social-btn:hover {
  background: linear-gradient(135deg, var(--violet), var(--cyan));
  border-color: transparent; color: #fff;
  transform: translateY(-3px);
}
.footer-divider { border-color: var(--glass-border); margin: 40px 0 24px; }
.footer-bottom { font-size: 0.8rem; color: var(--slate); }

/* --- Back to Top --- */
#backToTop {
  position: fixed; bottom: 30px; right: 30px;
  width: 46px; height: 46px; border-radius: 50%;
  background: linear-gradient(135deg, var(--violet), var(--cyan));
  border: none; color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem; cursor: pointer;
  box-shadow: 0 8px 24px rgba(124,58,237,0.45);
  opacity: 0; visibility: hidden;
  transition: all var(--transition);
  z-index: 999;
}
#backToTop.visible { opacity: 1; visibility: visible; }
#backToTop:hover { transform: translateY(-4px); }

/* --- AI Recommendations --- */
#ai-rec { background: var(--surface); }
.rec-card { padding: 20px; }
.rec-tag { font-size: 0.72rem; font-weight: 700; text-transform: uppercase; letter-spacing: 1px; color: var(--cyan); margin-bottom: 8px; }
.rec-card-title { font-size: 0.95rem; font-weight: 700; margin-bottom: 6px; }
.rec-card-sub { font-size: 0.82rem; color: var(--text-muted); }
.rec-score { font-size: 0.78rem; color: var(--violet); font-weight: 700; display: flex; align-items: center; gap: 4px; margin-top: 10px; }

/* --- Animations --- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInRight {
  from { opacity: 0; transform: translateX(40px); }
  to   { opacity: 1; transform: translateX(0); }
}

.reveal {
  opacity: 0; transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }

/* --- Responsive Tweaks --- */
@media (max-width: 991px) {
  .hero-visual { display: none; }
  .hero-stats { gap: 20px; }
  .contact-form-wrap { padding: 32px 24px; }
  .newsletter-input-group { flex-direction: column; }
  .hero-title { letter-spacing: -1px; }
}
@media (max-width: 576px) {
  .hero-stats { flex-wrap: wrap; gap: 20px; }
  .hero-stat { width: 45%; }
  .section-pad { padding: 70px 0; }
  .about-badge-float { position: static; margin-top: 16px; }
}

/* --- Utility --- */
.text-gradient { background: linear-gradient(135deg, var(--violet) 0%, var(--cyan) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.border-gradient {
  border: 1px solid transparent;
  background-clip: padding-box;
  position: relative;
}
.icon-violet { color: var(--violet); }
.icon-cyan   { color: var(--cyan); }
.bg-surface  { background: var(--surface); }

/* --- Cursor glow effect --- */
.cursor-glow {
  width: 350px; height: 350px; border-radius: 50%;
  background: radial-gradient(circle, rgba(124,58,237,0.08) 0%, transparent 70%);
  position: fixed; pointer-events: none;
  transform: translate(-50%,-50%);
  z-index: 0;
  transition: opacity 0.3s ease;
}