/* ============================================
   Arize Digital — Design System
   AI-Powered Marketing & Digital Transformation
   ============================================ */

/* Fonts loaded via <link> in HTML for better performance */

/* --- Tokens --- */
:root {
  --bg: #0e0e0f;
  --bg-card: #131314;
  --bg-card-hover: #1a191b;
  --bg-elevated: #201f21;
  --bg-input: #000000;
  --border: #262627;
  --border-focus: #00e3fd;
  --text: #ffffff;
  --text-muted: #adaaab;
  --text-dim: #767576;
  --accent: #39FF14;
  --accent-hover: #8eff71;
  --accent-glow: rgba(57, 255, 20, 0.25);
  --green: #2ff801;
  --green-glow: rgba(47, 248, 1, 0.15);
  --orange: #ff7351;
  --red: #ff7351;
  --cyan: #00e3fd;
  --pink: #ac89ff;
  --yellow: #facc15;
  --radius: 6px;
  --radius-lg: 12px;
  --radius-full: 999px;
  --shadow: 0 4px 24px rgba(0,0,0,0.6);
  --shadow-glow: 0 0 40px var(--accent-glow);
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --font: 'Manrope', 'DM Sans', 'Inter', -apple-system, sans-serif;
  --font-heading: 'Space Grotesk', 'Outfit', 'DM Sans', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

/* --- Light Theme --- */
[data-theme="light"] {
  --bg: #ffffff;
  --bg-card: #f8f8fa;
  --bg-card-hover: #f0f0f5;
  --bg-elevated: #f0f0f5;
  --bg-input: #ffffff;
  --border: #e0e0e5;
  --border-focus: #00e3fd;
  --text: #0e0e0f;
  --text-muted: #5a5a7a;
  --text-dim: #9999aa;
  --accent: #106f00;
  --accent-hover: #0d6100;
  --accent-glow: rgba(16, 111, 0, 0.15);
  --shadow: 0 4px 24px rgba(0,0,0,0.08);
  --shadow-glow: 0 0 40px rgba(16, 111, 0, 0.12);
}

/* --- Reset --- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: var(--accent); transition: var(--transition); }
a:hover { color: var(--accent-hover); }

h1, h2, h3, h4, .logo, .section-label, .pricing-tier, .score-grade, .stat-num {
  font-family: var(--font-heading);
}

/* --- Layout --- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 100px 0; }
.section-label {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 0.8rem; font-weight: 600; letter-spacing: 2px; text-transform: uppercase;
  color: var(--accent); margin-bottom: 16px;
  padding: 6px 16px; background: var(--accent-glow); border-radius: var(--radius-full);
}
.section-title {
  font-size: 2.5rem; font-weight: 800; line-height: 1.15;
  color: var(--text); margin-bottom: 16px;
}
.section-subtitle { font-size: 1.1rem; color: var(--text-muted); max-width: 600px; }
.text-center { text-align: center; }
.mx-auto { margin-left: auto; margin-right: auto; }
.grid { display: grid; gap: 24px; }

/* --- Buttons --- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 28px; border-radius: var(--radius); font-weight: 600;
  font-family: var(--font); font-size: 0.95rem; cursor: pointer;
  transition: var(--transition); border: none; text-decoration: none;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--green));
  color: #064200; box-shadow: 0 4px 20px var(--accent-glow); border: 1px solid var(--accent);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px var(--accent-glow); color: #064200; }
.btn-secondary {
  background: var(--bg-card); color: var(--text); border: 1px solid var(--border);
}
.btn-secondary:hover { background: var(--bg-card-hover); border-color: var(--accent); color: #fff; }
.btn-green {
  background: linear-gradient(135deg, var(--green), #16a34a);
  color: #fff; box-shadow: 0 4px 20px var(--green-glow);
}
.btn-green:hover { transform: translateY(-2px); box-shadow: 0 8px 30px var(--green-glow); color: #fff; }
.btn-sm { padding: 10px 20px; font-size: 0.85rem; }
.btn-lg { padding: 18px 36px; font-size: 1.05rem; }
.btn-block { width: 100%; }

/* --- Header --- */
.header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(10, 10, 15, 0.85); backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border);
}
[data-theme="light"] .header {
  background: rgba(245, 245, 250, 0.9);
}
.header-inner {
  display: flex; justify-content: space-between; align-items: center; height: 72px;
}
.logo { 
  display: flex; 
  align-items: center; 
  gap: 12px; 
  font-size: 1.5rem; 
  font-weight: 800; 
  color: var(--text); 
  line-height: 1;
  text-decoration: none;
}
.logo-text span:last-child {
  transform: translateY(1px); /* 1px downward nudge */
  font-size: 0.85rem;
  letter-spacing: 1px;
  text-transform: uppercase;
}
.logo-img {
  height: 40px;
  width: auto;
  object-fit: contain;
  animation: logoGlow 4s ease-in-out infinite;
  display: block;
}
/* Use SVG for true transparency */
.logo-img {
  content: url('logo-dark.svg');
}
[data-theme="light"] .logo-img {
  content: url('logo-light.svg');
}
@keyframes logoGlow {
  0%, 100% { filter: drop-shadow(0 0 10px var(--accent-glow)); }
  50% { filter: drop-shadow(0 0 20px var(--accent-glow)); }
}
.nav-links { display: flex; gap: 32px; list-style: none; align-items: center; }
.nav-links a, .dropbtn { color: var(--text-muted); font-weight: 500; font-size: 0.9rem; border: none; background: transparent; cursor: pointer; text-decoration: none; }
.nav-links a:hover, .dropdown:hover .dropbtn { color: var(--text); }
.dropdown { position: relative; display: inline-block; }
.dropdown-content {
  display: none; position: absolute; background-color: var(--bg-card);
  min-width: 160px; box-shadow: var(--shadow); z-index: 101; border-radius: var(--radius);
  border: 1px solid var(--border); top: 100%; padding: 8px 0;
}
.dropdown-content a {
  color: var(--text-muted); padding: 10px 16px; text-decoration: none; display: block;
  font-size: 0.85rem;
}
.dropdown-content a:hover { background-color: var(--bg-elevated); color: var(--accent); padding-left: 20px; transition: var(--transition); }
.dropdown:hover .dropdown-content { display: block; animation: fadeIn 0.2s ease; }
.header-cta { display: flex; gap: 12px; align-items: center; }
.mobile-toggle { display: none; background: none; border: none; color: var(--text); font-size: 1.5rem; cursor: pointer; }

/* --- Hero --- */
.hero {
  padding: 60px 0 80px; position: relative;
  overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; top: -200px; right: -200px;
  width: 600px; height: 600px; border-radius: 50%;
  background: radial-gradient(circle, var(--accent-glow), transparent 70%);
  pointer-events: none;
}
.hero::after {
  content: ''; position: absolute; bottom: -100px; left: -100px;
  width: 400px; height: 400px; border-radius: 50%;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.1), transparent 70%);
  pointer-events: none;
}

/* --- Hero Growth Animation (SVG) --- */
.hero-growth-svg {
  position: absolute; bottom: 0; left: 0; width: 100%; height: 100%;
  z-index: 1; opacity: 0.08; pointer-events: none;
}
[data-theme="light"] .hero-growth-svg { opacity: 0.06; }
.growth-bar {
  fill: var(--accent); height: 0;
  animation: growBar 2s ease-out forwards;
}
.bar-1 { animation-delay: 0.1s; --target-h: 60; }
.bar-2 { animation-delay: 0.25s; --target-h: 100; }
.bar-3 { animation-delay: 0.4s; --target-h: 140; }
.bar-4 { animation-delay: 0.55s; --target-h: 180; }
.bar-5 { animation-delay: 0.7s; --target-h: 230; }
.bar-6 { animation-delay: 0.85s; --target-h: 270; }
.bar-7 { animation-delay: 1.0s; --target-h: 310; }
.bar-8 { animation-delay: 1.15s; --target-h: 340; }
@keyframes growBar {
  from { height: 0; opacity: 0; }
  to { height: calc(var(--target-h) * 1px); opacity: 1; }
}
.growth-line {
  fill: none; stroke: var(--accent); stroke-width: 2.5;
  stroke-dasharray: 800; stroke-dashoffset: 800;
  animation: drawLine 2.5s ease-out 0.3s forwards;
}
@keyframes drawLine {
  to { stroke-dashoffset: 0; }
}
.growth-dot {
  fill: var(--accent); opacity: 0;
  animation: dotAppear 0.3s ease forwards;
}
.dot-1 { animation-delay: 0.5s; }
.dot-2 { animation-delay: 1.0s; }
.dot-3 { animation-delay: 1.5s; }
.dot-4 { animation-delay: 2.0s; }
.dot-5 { animation-delay: 2.3s; r: 6; }
@keyframes dotAppear {
  from { opacity: 0; transform: scale(0); }
  to { opacity: 0.8; transform: scale(1); }
}
.hero-content { position: relative; z-index: 2; text-align: center; max-width: 800px; margin: 0 auto; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--bg-card); border: 1px solid var(--border);
  padding: 8px 20px; border-radius: var(--radius-full);
  font-size: 0.85rem; color: var(--text-muted); margin-bottom: 32px;
}
.hero-badge .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--green); animation: pulse 2s infinite; }
.hero h1 {
  font-size: 4rem; font-weight: 900; line-height: 1.08;
  background: linear-gradient(135deg, var(--text) 0%, var(--accent-hover) 50%, var(--text) 100%);
  background-size: 200% auto; -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text; margin-bottom: 24px;
  animation: shimmer 8s linear infinite;
}
@keyframes shimmer { to { background-position: 200% center; } }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.4; } }
.hero p { font-size: 1.2rem; color: var(--text-muted); margin-bottom: 40px; max-width: 600px; margin-left: auto; margin-right: auto; }
.hero-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero-stats {
  display: flex; gap: 48px; justify-content: center; margin-top: 64px;
  padding-top: 40px; border-top: 1px solid var(--border);
}
.stat { text-align: center; }
.stat-num { font-size: 2rem; font-weight: 800; color: var(--text); }
.stat-label { font-size: 0.85rem; color: var(--text-muted); margin-top: 4px; }

/* --- Cards --- */
.card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 32px;
  transition: var(--transition); position: relative; overflow: hidden;
}
.card:hover { border-color: var(--accent); transform: translateY(-4px); box-shadow: var(--shadow-glow); }
.card-icon {
  width: 52px; height: 52px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem; margin-bottom: 20px;
}
.card-icon.blue { background: rgba(99, 102, 241, 0.15); color: var(--accent); }
.card-icon.green { background: rgba(34, 197, 94, 0.15); color: var(--green); }
.card-icon.orange { background: rgba(249, 115, 22, 0.15); color: var(--orange); }
.card-icon.pink { background: rgba(236, 72, 153, 0.15); color: var(--pink); }
.card-icon.cyan { background: rgba(6, 182, 212, 0.15); color: var(--cyan); }
.card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 8px; }
.card p { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 0; }

/* --- Services Grid --- */
.services-grid { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }

/* --- Free Tools Section --- */
.tool-section { background: var(--bg-elevated); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.tool-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 40px; max-width: 700px; margin: 0 auto;
}
.tool-card h3 { font-size: 1.5rem; margin-bottom: 8px; }
.tool-card .desc { color: var(--text-muted); margin-bottom: 24px; }

/* --- Input --- */
.input-group { display: flex; gap: 12px; margin-bottom: 20px; }
.input-group input, .input-group select {
  flex: 1; padding: 14px 18px; background: var(--bg-input);
  border: 1px solid var(--border); border-radius: var(--radius);
  color: var(--text); font-family: var(--font); font-size: 0.95rem;
  transition: var(--transition);
}
.input-group input:focus, .input-group select:focus {
  outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow);
}
.form-group { display: flex; flex-direction: column; gap: 8px; margin-bottom: 16px; }
.form-group label { font-weight: 600; font-size: 0.85rem; color: var(--text-muted); }
.form-input {
  padding: 12px 16px; background: var(--bg-input); border: 1px solid var(--border);
  border-radius: var(--radius); color: var(--text); font-family: var(--font); font-size: 0.9rem;
  transition: var(--transition);
}
.form-input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* --- Score Card --- */
.score-card {
  display: none; margin-top: 24px; padding: 24px;
  background: var(--bg-elevated); border: 1px solid var(--border); border-radius: var(--radius);
}
.score-card.active { display: block; animation: fadeIn 0.3s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
.score-overall {
  text-align: center; margin-bottom: 24px; padding-bottom: 24px; border-bottom: 1px solid var(--border);
}
.score-ring {
  width: 100px; height: 100px; border-radius: 50%; margin: 0 auto 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 2rem; font-weight: 900;
  background: conic-gradient(var(--accent) 0%, var(--accent) var(--pct), var(--border) var(--pct), var(--border) 100%);
}
.score-ring-inner {
  width: 80px; height: 80px; border-radius: 50%; background: var(--bg-elevated);
  display: flex; align-items: center; justify-content: center;
}
.score-bars { display: grid; gap: 14px; }
.score-bar-item { display: flex; align-items: center; gap: 12px; }
.score-bar-label { width: 140px; font-size: 0.85rem; color: var(--text-muted); }
.score-bar-track { flex: 1; height: 8px; background: var(--border); border-radius: 4px; overflow: hidden; }
.score-bar-fill { height: 100%; border-radius: 4px; transition: width 0.8s ease; }
.score-bar-val { width: 40px; text-align: right; font-weight: 700; font-size: 0.85rem; }

/* --- Pricing --- */
.pricing-grid { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); align-items: start; }
.pricing-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 36px; position: relative;
  transition: var(--transition);
}
.pricing-card:hover { border-color: var(--accent); }
.pricing-card.featured {
  border-color: var(--accent); box-shadow: var(--shadow-glow);
  transform: scale(1.03);
}
.pricing-card.featured::before {
  content: '🔥 MOST POPULAR'; position: absolute; top: -14px; left: 50%; transform: translateX(-50%);
  background: linear-gradient(135deg, var(--accent), #8b5cf6);
  color: #fff; font-size: 0.7rem; font-weight: 700; letter-spacing: 1px;
  padding: 6px 18px; border-radius: var(--radius-full);
}
.pricing-tier { font-size: 0.85rem; font-weight: 600; color: var(--accent); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 8px; }
.pricing-price { font-size: 2.5rem; font-weight: 900; margin-bottom: 4px; }
.pricing-price small { font-size: 0.9rem; font-weight: 500; color: var(--text-muted); }
.pricing-note { font-size: 0.8rem; color: var(--text-dim); margin-bottom: 24px; }
.pricing-features { list-style: none; margin-bottom: 28px; }
.pricing-features li {
  display: flex; align-items: flex-start; gap: 10px;
  padding: 8px 0; font-size: 0.9rem; color: var(--text-muted);
  border-bottom: 1px solid rgba(42, 42, 61, 0.5);
}
.pricing-features li:last-child { border-bottom: none; }
.check { color: var(--green); font-weight: 700; flex-shrink: 0; }

/* --- FAQ --- */
.faq-item {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); margin-bottom: 12px; overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: var(--accent); }
.faq-q {
  display: flex; justify-content: space-between; align-items: center;
  padding: 20px 24px; cursor: pointer; font-weight: 600;
  font-size: 0.95rem; color: var(--text); user-select: none;
}
.faq-q .arrow { transition: transform 0.3s; color: var(--text-muted); }
.faq-item.active .faq-q .arrow { transform: rotate(180deg); }
.faq-a {
  height: 0; overflow: hidden; transition: height 0.3s ease;
}
.faq-a-inner { padding: 0 24px 20px; color: var(--text-muted); font-size: 0.9rem; line-height: 1.8; }

/* --- Invoice Section --- */
.invoice-section { padding: 60px 0; }
.invoice-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 40px; max-width: 800px; margin: 0 auto;
}
.invoice-row { display: grid; gap: 16px; margin-bottom: 16px; }
.invoice-items-table {
  width: 100%; border-collapse: collapse; margin-bottom: 16px;
}
.invoice-items-table th {
  text-align: left; padding: 10px 12px; font-size: 0.8rem;
  color: var(--text-muted); border-bottom: 1px solid var(--border);
  text-transform: uppercase; letter-spacing: 1px;
}
.invoice-items-table td { padding: 8px 12px; }
.invoice-items-table input, .invoice-items-table select {
  width: 100%; padding: 10px; background: var(--bg-input); border: 1px solid var(--border);
  border-radius: 8px; color: var(--text); font-family: var(--font); font-size: 0.9rem;
}
.invoice-items-table input:focus, .invoice-items-table select:focus {
  outline: none; border-color: var(--accent);
}
.invoice-totals {
  display: flex; justify-content: flex-end; margin-top: 16px;
}
.invoice-totals-inner {
  min-width: 280px; display: grid; gap: 8px;
}
.invoice-total-row {
  display: flex; justify-content: space-between; padding: 8px 0;
  font-size: 0.9rem; color: var(--text-muted);
}
.invoice-total-row.grand {
  border-top: 2px solid var(--accent); font-weight: 800;
  font-size: 1.1rem; color: var(--text); padding-top: 12px; margin-top: 4px;
}
.remove-row-btn {
  background: none; border: none; color: var(--red); cursor: pointer; font-size: 1.1rem;
  opacity: 0.6; transition: var(--transition);
}
.remove-row-btn:hover { opacity: 1; }

/* --- Footer --- */
.footer {
  background: var(--bg-card); border-top: 1px solid var(--border); padding: 60px 0 24px;
}
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; margin-bottom: 48px;
}
.footer h4 { font-size: 0.85rem; font-weight: 600; text-transform: uppercase; letter-spacing: 1.5px; color: var(--text); margin-bottom: 16px; }
.footer p, .footer a { color: var(--text-muted); font-size: 0.9rem; }
.footer-links { list-style: none; }
.footer-links li { margin-bottom: 10px; }
.footer-links a:hover { color: var(--accent); }
.footer-bottom { border-top: 1px solid var(--border); padding-top: 24px; text-align: center; font-size: 0.8rem; color: var(--text-dim); }

/* --- Loading Spinner --- */
.spinner {
  width: 20px; height: 20px; border: 2px solid var(--border);
  border-top-color: var(--accent); border-radius: 50%;
  animation: spin 0.6s linear infinite; display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* --- Responsive --- */
@media (max-width: 900px) {
  .hero h1 { font-size: 2.5rem; }
  .hero-stats { flex-direction: column; gap: 24px; }
  .nav-links { display: none; }
  .mobile-toggle { display: block; }
  .header-cta .btn:not(#themeBtn) { display: none; }
  .footer-grid { grid-template-columns: 1fr; }
  .pricing-card.featured { transform: scale(1); }
  .form-row { grid-template-columns: 1fr; }
  .input-group { flex-direction: column; }
  .section { padding: 60px 0; }
}

/* --- Testimonials --- */
.testimonials-section { overflow: hidden; }
.testimonial-track {
  width: 100%; overflow: hidden; padding: 20px 0;
  mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
}
.testimonial-slider {
  display: flex; gap: 24px;
  animation: scrollTestimonials 35s linear infinite;
  width: max-content;
}
.testimonial-slider:hover { animation-play-state: paused; }
.testimonial-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 32px; width: 350px; flex-shrink: 0;
  box-shadow: var(--shadow);
}
.testimonial-stars { color: #facc15; font-size: 1.2rem; margin-bottom: 16px; letter-spacing: 2px; }
.testimonial-text { font-size: 0.95rem; color: var(--text-muted); line-height: 1.6; margin-bottom: 24px; font-style: italic; }
.testimonial-author { display: flex; align-items: center; gap: 16px; border-top: 1px solid var(--border); padding-top: 16px; }
.testimonial-avatar {
  width: 40px; height: 40px; border-radius: 50%; background: var(--accent-glow);
  color: var(--accent); display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-family: var(--font-heading);
}

@keyframes scrollTestimonials {
  0% { transform: translateX(0); }
  100% { transform: translateX(calc(-50% - 12px)); }
}

/* --- Contact Section --- */
.contact-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 40px; box-shadow: var(--shadow);
  margin-bottom: 32px;
}
.contact-direct {
  display: flex; justify-content: center; gap: 24px; flex-wrap: wrap;
}
.contact-direct-item {
  display: flex; align-items: center; gap: 12px; padding: 16px 24px;
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-full);
  color: var(--text); font-weight: 600; font-size: 1rem;
}
.contact-direct-item i { font-size: 1.4rem; color: var(--accent); }
.contact-direct-item:hover {
  border-color: var(--accent); background: var(--accent-glow); transform: translateY(-3px);
  box-shadow: var(--shadow-glow);
}
.contact-success {
  text-align: center; padding: 48px 0; animation: fadeUp 0.5s ease;
}

/* --- Utilities --- */
.mt-2 { margin-top: 0.5rem; }
.mt-4 { margin-top: 1rem; }
.mt-8 { margin-top: 2rem; }
.hidden { display: none !important; }
.text-green { color: var(--green); }
.text-accent { color: var(--accent); }
.text-orange { color: var(--orange); }
.text-red { color: var(--red); }
.text-muted { color: var(--text-muted); }
.fw-700 { font-weight: 700; }
.fw-1000 { font-weight: 900; }

/* --- Scroll to Top Button --- */
.scroll-top-btn {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  border: none;
  font-size: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-glow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all 0.3s ease;
  z-index: 999;
}
.scroll-top-btn.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.scroll-top-btn:hover {
  background: var(--accent-hover);
  transform: translateY(-3px);
  box-shadow: 0 10px 25px rgba(99, 102, 241, 0.4);
}