/* ============================================
   DESIGN SYSTEM — Dev Studio
   Modern, Minimal, Business-grade
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* --- Tokens --- */
:root {
  --bg-primary: #08080c;
  --bg-secondary: #0e0e14;
  --bg-card: #13131b;
  --bg-card-hover: #1a1a25;

  --border: #1e1e2a;
  --border-hover: #2d2d40;

  --text-primary: #eaeaf0;
  --text-secondary: #8888a0;
  --text-muted: #55556a;

  --accent: #6366f1;
  --accent-hover: #818cf8;
  --accent-muted: rgba(99, 102, 241, 0.12);
  --accent-glow: rgba(99, 102, 241, 0.25);

  --success: #22c55e;
  --warning: #f59e0b;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --container: 1200px;
  --gap: 24px;

  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--accent-hover);
}

img {
  max-width: 100%;
  display: block;
}

/* --- Container --- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gap);
}

/* --- Typography --- */
h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

h1 { font-size: clamp(2.4rem, 5vw, 4rem); }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.8rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); }
h4 { font-size: 1.1rem; }

p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 640px;
}

.mono {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.section-label::before {
  content: '';
  display: inline-block;
  width: 24px;
  height: 1px;
  background: var(--accent);
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 0 var(--gap);
  background: rgba(8, 8, 12, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

.nav-inner {
  max-width: var(--container);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-logo-mark {
  width: 28px;
  height: 28px;
  background: var(--accent);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: white;
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
  position: relative;
}

.nav-links a:hover {
  color: var(--text-primary);
}

.nav-cta {
  padding: 8px 20px;
  background: var(--accent);
  color: white !important;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.85rem;
  transition: background var(--transition), transform var(--transition);
  cursor: pointer;
  border: none;
}

.nav-cta:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

.nav-mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-mobile-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  margin: 5px 0;
  transition: var(--transition);
}

/* --- Hero --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding-top: 64px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, var(--accent-muted), transparent),
    var(--bg-primary);
  z-index: 0;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.3;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 20%, transparent 70%);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 780px;
}

.hero-centered {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  max-width: 100%;
  margin: 0 auto;
}

.hero-centered h1 {
  margin-bottom: 16px;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 520px;
  margin-bottom: 48px;
  line-height: 1.6;
}

/* --- Mega CTA Button --- */
.hero-mega-cta {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 20px 40px 20px 28px;
  background: linear-gradient(135deg, var(--accent), #8b5cf6);
  color: white;
  border: none;
  border-radius: var(--radius-lg);
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  box-shadow:
    0 0 40px var(--accent-glow),
    0 8px 32px rgba(99, 102, 241, 0.3);
  animation: cta-glow 3s ease-in-out infinite;
}

@keyframes cta-glow {
  0%, 100% {
    box-shadow:
      0 0 40px var(--accent-glow),
      0 8px 32px rgba(99, 102, 241, 0.3);
  }
  50% {
    box-shadow:
      0 0 60px rgba(99, 102, 241, 0.4),
      0 12px 48px rgba(99, 102, 241, 0.4);
  }
}

.hero-mega-cta:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow:
    0 0 80px rgba(99, 102, 241, 0.5),
    0 16px 60px rgba(99, 102, 241, 0.4);
}

.hero-mega-cta:active {
  transform: translateY(0) scale(0.98);
}

.hero-mega-cta-icon {
  width: 52px;
  height: 52px;
  background: rgba(255,255,255,0.15);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.hero-mega-cta-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
}

.hero-mega-cta-text strong {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.hero-mega-cta-text small {
  font-size: 0.8rem;
  opacity: 0.8;
  font-weight: 400;
}

.hero-mega-cta-arrow {
  font-size: 1.5rem;
  font-weight: 300;
  opacity: 0.7;
  margin-left: 8px;
  transition: transform 0.3s ease;
}

.hero-mega-cta:hover .hero-mega-cta-arrow {
  transform: translateX(6px);
  opacity: 1;
}

/* --- Trust line --- */
.hero-trust {
  display: flex;
  gap: 28px;
  margin-top: 48px;
  flex-wrap: wrap;
  justify-content: center;
}

.hero-trust-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

.hero-trust-item svg {
  color: var(--success);
  flex-shrink: 0;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  background: var(--accent-muted);
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: 100px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-hover);
  margin-bottom: 28px;
  letter-spacing: 0.02em;
}

.hero-badge-dot {
  width: 6px;
  height: 6px;
  background: var(--success);
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero h1 .accent {
  color: var(--accent);
}

/* --- Buttons (shared) --- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all var(--transition);
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--accent-glow);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 500;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all var(--transition);
}

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

/* --- Section --- */
section {
  padding: 120px 0;
}

.section-header {
  margin-bottom: 64px;
}

.section-header p {
  margin-top: 16px;
}

/* --- Services Grid --- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap);
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  transition: all var(--transition-slow);
  cursor: default;
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-slow);
}

.service-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
}

.service-card:hover::before {
  transform: scaleX(1);
}

.service-icon {
  width: 44px;
  height: 44px;
  background: var(--accent-muted);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  color: var(--accent);
}

.service-icon svg {
  width: 22px;
  height: 22px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.service-card h3 {
  margin-bottom: 12px;
}

.service-card p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 20px;
}

.service-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  padding: 4px 10px;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: 100px;
  letter-spacing: 0.02em;
}

/* --- Process Timeline --- */
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2px;
}

.process-step {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 40px 32px;
  position: relative;
  transition: all var(--transition);
}

.process-step:first-child { border-radius: var(--radius-lg) 0 0 var(--radius-lg); }
.process-step:last-child { border-radius: 0 var(--radius-lg) var(--radius-lg) 0; }

.process-step:hover {
  background: var(--bg-card-hover);
  z-index: 1;
}

.process-number {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  margin-bottom: 20px;
  font-weight: 600;
}

.process-step h4 {
  margin-bottom: 10px;
}

.process-step p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* --- Tech Stack --- */
.stack-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px;
}

.stack-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition);
}

.stack-item:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
}

.stack-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* --- Cases --- */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--gap);
}

.case-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-slow);
}

.case-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
}

.case-image {
  height: 220px;
  background: var(--bg-secondary);
  position: relative;
  overflow: hidden;
}

.case-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.case-card:hover .case-image img {
  transform: scale(1.05);
}

.case-image-gradient {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--accent-muted), rgba(99,102,241,0.05));
}

.case-body {
  padding: 32px;
}

.case-category {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 12px;
}

.case-card h3 {
  margin-bottom: 10px;
}

.case-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.case-metrics {
  display: flex;
  gap: 24px;
}

.case-metric {
  display: flex;
  flex-direction: column;
}

.case-metric-value {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

.case-metric-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  text-transform: uppercase;
}

/* --- CTA / Quiz Section --- */
.cta-section {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 80px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-muted), transparent 70%);
  pointer-events: none;
}

.cta-section h2 {
  position: relative;
  margin-bottom: 16px;
}

.cta-section p {
  margin: 0 auto 40px;
  text-align: center;
}

.cta-section .btn-primary {
  padding: 16px 40px;
  font-size: 1rem;
}

/* --- Quiz Modal --- */
.quiz-overlay {
  position: fixed;
  inset: 0;
  background: rgba(8, 8, 12, 0.85);
  backdrop-filter: blur(8px);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: var(--gap);
}

.quiz-overlay.active {
  display: flex;
}

.quiz-container {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 640px;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
}

.quiz-header {
  padding: 32px 40px 0;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.quiz-close {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1.4rem;
  padding: 4px;
  transition: color var(--transition);
  line-height: 1;
}

.quiz-close:hover {
  color: var(--text-primary);
}

.quiz-progress {
  padding: 24px 40px;
}

.quiz-progress-bar {
  width: 100%;
  height: 3px;
  background: var(--border);
  border-radius: 10px;
  overflow: hidden;
}

.quiz-progress-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 10px;
  transition: width var(--transition-slow);
}

.quiz-progress-text {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 8px;
  text-align: right;
}

.quiz-body {
  padding: 0 40px 40px;
}

.quiz-step {
  display: none;
}

.quiz-step.active {
  display: block;
  animation: fadeInUp 0.3s ease;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.quiz-question {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.quiz-hint {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 28px;
}

.quiz-options {
  display: grid;
  gap: 10px;
}

.quiz-option {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--text-secondary);
  text-align: left;
  width: 100%;
}

.quiz-option:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  color: var(--text-primary);
}

.quiz-option.selected {
  border-color: var(--accent);
  background: var(--accent-muted);
  color: var(--text-primary);
}

.quiz-option-marker {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-hover);
  border-radius: 50%;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}

.quiz-option.selected .quiz-option-marker {
  border-color: var(--accent);
  background: var(--accent);
}

.quiz-option.selected .quiz-option-marker::after {
  content: '';
  width: 6px;
  height: 6px;
  background: white;
  border-radius: 50%;
}

.quiz-options-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.quiz-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition);
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.quiz-checkbox:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
}

.quiz-checkbox.selected {
  border-color: var(--accent);
  background: var(--accent-muted);
  color: var(--text-primary);
}

.quiz-checkbox-marker {
  width: 18px;
  height: 18px;
  border: 2px solid var(--border-hover);
  border-radius: 4px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  margin-top: 1px;
}

.quiz-checkbox.selected .quiz-checkbox-marker {
  border-color: var(--accent);
  background: var(--accent);
}

.quiz-checkbox.selected .quiz-checkbox-marker::after {
  content: '✓';
  color: white;
  font-size: 0.65rem;
  font-weight: 700;
}

.quiz-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 32px;
}

.quiz-btn-back {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-family: var(--font-sans);
  cursor: pointer;
  padding: 10px 0;
  transition: color var(--transition);
}

.quiz-btn-back:hover {
  color: var(--text-primary);
}

.quiz-btn-next {
  padding: 12px 28px;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all var(--transition);
}

.quiz-btn-next:hover {
  background: var(--accent-hover);
}

.quiz-btn-next:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* Back Button */
.quiz-btn-back {
  padding: 10px 20px;
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-family: var(--font-sans);
  cursor: pointer;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  transition: all var(--transition);
}

.quiz-btn-back:hover {
  border-color: var(--text-secondary);
  color: var(--text-secondary);
}

/* Accent variant for final step */
.quiz-btn-next.accent {
  background: linear-gradient(135deg, var(--accent), #8b5cf6);
}

/* Option Card Grid */
.quiz-option-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin: 12px 0;
}

.quiz-option-grid.cols-2 {
  grid-template-columns: repeat(2, 1fr);
}

@media (max-width: 600px) {
  .quiz-option-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.quiz-option-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 14px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(255,255,255,0.02);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s;
  font-family: var(--font-sans);
  font-size: 0.82rem;
  text-align: center;
}

.quiz-option-card:hover {
  border-color: var(--accent);
  color: var(--text-primary);
  background: rgba(99, 102, 241, 0.05);
}

.quiz-option-card.selected {
  border-color: var(--accent);
  background: rgba(99, 102, 241, 0.12);
  color: var(--text-primary);
  box-shadow: 0 0 0 1px var(--accent);
}

.quiz-option-icon {
  font-size: 1.4rem;
}

.quiz-option-label {
  font-size: 0.78rem;
  line-height: 1.3;
}

/* Divider */
.quiz-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 16px 0 10px;
  color: var(--text-muted);
  font-size: 0.75rem;
}

.quiz-divider::before,
.quiz-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* Progress Bar */
.quiz-progress {
  padding: 16px 28px 0;
}

.quiz-progress-bar {
  height: 3px;
  background: var(--border);
  border-radius: 3px;
  overflow: hidden;
}

.quiz-progress-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 3px;
  transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.quiz-progress-steps {
  display: flex;
  justify-content: space-between;
  margin-top: 10px;
}

.quiz-progress-step {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.7rem;
  color: var(--text-muted);
  opacity: 0.4;
  transition: all var(--transition);
}

.quiz-progress-step.active {
  opacity: 1;
}

.quiz-progress-step.current {
  color: var(--accent);
}

.quiz-progress-num {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.6rem;
  font-weight: 700;
}

.quiz-progress-step.active .quiz-progress-num {
  background: var(--accent);
  color: #fff;
}

.quiz-progress-label {
  display: none;
}

@media (min-width: 600px) {
  .quiz-progress-label {
    display: inline;
  }
}

/* Option Cards Grid */
.quiz-options-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-top: 12px;
}

.quiz-options-grid.cols-2 {
  grid-template-columns: repeat(2, 1fr);
}

.quiz-options-grid.cols-3 {
  grid-template-columns: repeat(3, 1fr);
}

.quiz-options-grid.cols-4 {
  grid-template-columns: repeat(2, 1fr);
}

@media (min-width: 500px) {
  .quiz-options-grid.cols-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

.quiz-option-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px;
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
}

.quiz-option-card:hover {
  border-color: rgba(99, 102, 241, 0.4);
  background: rgba(99, 102, 241, 0.05);
}

.quiz-option-card.selected {
  border-color: var(--accent);
  background: rgba(99, 102, 241, 0.1);
  box-shadow: 0 0 0 1px var(--accent);
}

.quiz-option-card.compact {
  padding: 10px 12px;
  text-align: left;
}

.quiz-option-card.mini {
  padding: 10px 8px;
  text-align: center;
}

.quiz-option-card.selectable {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  text-align: left;
}

.quiz-option-icon {
  font-size: 1.5rem;
  display: block;
  margin-bottom: 6px;
}

.quiz-option-card.compact .quiz-option-icon,
.quiz-option-card.selectable .quiz-option-icon {
  font-size: 1.2rem;
  margin-bottom: 0;
}

.quiz-option-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.quiz-option-desc {
  font-size: 0.72rem;
  color: var(--text-muted);
  line-height: 1.3;
}

.quiz-option-check {
  flex-shrink: 0;
  margin-top: 2px;
}

.quiz-sub-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-top: 20px;
  margin-bottom: 4px;
}

/* Quiz AI badge */
.quiz-ai-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 8px;
  font-size: 0.78rem;
  color: var(--accent-hover);
  font-weight: 500;
}

/* Quiz quick options */
.quiz-quick-options {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.quiz-quick-btn {
  padding: 8px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 100px;
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.quiz-quick-btn:hover {
  border-color: var(--accent);
  color: var(--text-primary);
  background: var(--accent-muted);
}

/* Quiz textarea */
.quiz-custom-input {
  margin-bottom: 16px;
}

.quiz-textarea {
  width: 100%;
  padding: 14px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: var(--font-sans);
  resize: vertical;
  min-height: 80px;
  outline: none;
  transition: border-color var(--transition);
  line-height: 1.5;
}

.quiz-textarea:focus {
  border-color: var(--accent);
}

.quiz-textarea::placeholder {
  color: var(--text-muted);
}

/* Quiz loading */
.quiz-loading {
  text-align: center;
  padding: 40px 0;
}

.quiz-loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 24px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.quiz-loading-text {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.quiz-loading-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 28px;
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
}

.quiz-loading-steps {
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: center;
}

.quiz-loading-step {
  font-size: 0.82rem;
  color: var(--text-muted);
  opacity: 0.3;
  transition: opacity 0.4s ease;
  font-family: var(--font-mono);
}

.quiz-loading-step.active {
  opacity: 1;
  color: var(--accent);
}

/* Quiz result body */
.quiz-result-body {
  max-height: calc(90vh - 80px);
  overflow-y: auto;
}

.quiz-result-project {
  margin-bottom: 24px;
}

.quiz-result-project-name {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* MVP Block */
.quiz-mvp-block {
  background: var(--bg-card);
  border: 1px solid var(--accent);
  border-radius: var(--radius-lg);
  padding: 28px;
  margin-bottom: 24px;
}

.quiz-mvp-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 16px;
}

.quiz-mvp-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  margin-bottom: 4px;
  font-weight: 600;
}

.quiz-mvp-timeline {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.quiz-mvp-price {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1;
}

.quiz-mvp-description {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 18px;
  line-height: 1.5;
}

.quiz-mvp-includes {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 18px;
}

.quiz-mvp-includes li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-primary);
}

.quiz-mvp-includes svg {
  flex-shrink: 0;
  color: var(--success);
  margin-top: 2px;
}

.quiz-mvp-rate {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  padding-top: 14px;
  border-top: 1px solid var(--border);
}

/* Extras Block */
.quiz-extras-block {
  margin-bottom: 24px;
}

.quiz-extras-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 18px;
}

.quiz-extras-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.quiz-extras-subtitle {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.quiz-extras-counter {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  background: var(--accent-muted);
  padding: 4px 10px;
  border-radius: 100px;
  white-space: nowrap;
  flex-shrink: 0;
  margin-top: 2px;
}

.quiz-extras-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-bottom: 20px;
}

.quiz-extra-item {
  display: flex;
  align-items: center;
  padding: 14px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  gap: 14px;
  cursor: pointer;
  transition: all var(--transition);
  user-select: none;
}

.quiz-extra-item:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
}

.quiz-extra-item.selected {
  border-color: var(--accent);
  background: var(--accent-muted);
}

.quiz-extra-checkbox {
  flex-shrink: 0;
}

.quiz-extra-check-box {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-hover);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}

.quiz-extra-check-box svg {
  opacity: 0;
  transition: opacity var(--transition);
}

.quiz-extra-item.selected .quiz-extra-check-box {
  border-color: var(--accent);
  background: var(--accent);
}

.quiz-extra-item.selected .quiz-extra-check-box svg {
  opacity: 1;
  color: white;
}

.quiz-extra-info {
  flex: 1;
  min-width: 0;
}

.quiz-extra-name {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.quiz-extra-desc {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.quiz-extra-price {
  text-align: right;
  flex-shrink: 0;
}

.quiz-extra-price-value {
  display: block;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
}

.quiz-extra-days {
  display: block;
  font-size: 0.7rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.quiz-extra-price.blurred .quiz-extra-price-value,
.quiz-extra-price.blurred .quiz-extra-days {
  filter: blur(8px);
  user-select: none;
  pointer-events: none;
}

.blurred-inline {
  filter: blur(8px);
  user-select: none;
  pointer-events: none;
}

/* Totals */
.quiz-totals {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  margin-top: 20px;
}

.quiz-totals-line {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding: 6px 0;
}

.quiz-totals-line strong {
  color: var(--text-primary);
  font-size: 0.95rem;
}

.quiz-totals-total {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 14px;
  margin-top: 10px;
  border-top: 1px solid var(--border);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.quiz-totals-total strong {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--accent-hover);
}
/* --- Killer Features --- */
.quiz-killers-block {
  margin-bottom: 24px;
}

.quiz-killers-header {
  margin-bottom: 16px;
}

.quiz-killers-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.05rem;
  font-weight: 700;
  color: #f59e0b;
  margin-bottom: 4px;
}

.quiz-killers-title svg {
  color: #f59e0b;
}

.quiz-killers-subtitle {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.quiz-killers-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.quiz-killer-item {
  display: flex;
  align-items: center;
  padding: 16px 18px;
  background: var(--bg-card);
  border: 1px solid rgba(245, 158, 11, 0.2);
  border-radius: var(--radius-md);
  gap: 14px;
  cursor: pointer;
  transition: all var(--transition);
  user-select: none;
}

.quiz-killer-item:hover {
  border-color: rgba(245, 158, 11, 0.4);
  background: rgba(245, 158, 11, 0.04);
}

.quiz-killer-item.selected {
  border-color: #f59e0b;
  background: rgba(245, 158, 11, 0.08);
}

.quiz-killer-item.selected .quiz-extra-check-box {
  border-color: #f59e0b;
  background: #f59e0b;
}

.quiz-killer-tech {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: #f59e0b;
  background: rgba(245, 158, 11, 0.1);
  padding: 2px 8px;
  border-radius: 100px;
  letter-spacing: 0.02em;
}

/* --- Totals --- */
.quiz-totals {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  margin-top: 20px;
  margin-bottom: 20px;
}

.quiz-totals-line {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding: 6px 0;
}

.quiz-totals-line strong {
  color: var(--text-primary);
  font-size: 0.95rem;
}

.quiz-totals-total {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 14px;
  margin-top: 10px;
  border-top: 1px solid var(--border);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.quiz-totals-total strong {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--accent-hover);
}

.quiz-unlock {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.quiz-unlock-text {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.quiz-unlock-text svg {
  color: var(--accent);
  flex-shrink: 0;
}

.quiz-unlock-form {
  display: flex;
  gap: 10px;
}

.quiz-unlock-form .quiz-input {
  flex: 1;
}

.quiz-unlock-form .quiz-btn-next {
  white-space: nowrap;
}

.quiz-extras-total {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 20px;
  background: var(--accent-muted);
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.quiz-extras-total strong {
  font-size: 1.2rem;
  color: var(--text-primary);
}

/* Quiz result actions */
.quiz-result-actions {
  display: flex;
  gap: 12px;
}

/* Error */
.quiz-error {
  text-align: center;
  padding: 40px 0;
}

.quiz-error-icon {
  width: 56px;
  height: 56px;
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 1.4rem;
  font-weight: 700;
  color: #ef4444;
}

.quiz-error-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.quiz-error-text {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

/* Quiz contact form */
.quiz-form-group {
  margin-bottom: 18px;
}

.quiz-form-group label {
  display: block;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 6px;
  font-weight: 500;
}

.quiz-input {
  width: 100%;
  padding: 13px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: var(--font-sans);
  transition: border-color var(--transition);
  outline: none;
}

.quiz-input:focus {
  border-color: var(--accent);
}

.quiz-input::placeholder {
  color: var(--text-muted);
}

/* Quiz result */
.quiz-result {
  text-align: center;
  padding: 20px 0;
}

.quiz-result-price {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--text-primary);
  margin: 24px 0 8px;
}

.quiz-result-note {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 32px;
}

.quiz-result-icon {
  width: 64px;
  height: 64px;
  background: var(--accent-muted);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto;
  color: var(--accent);
  font-size: 1.8rem;
}

/* --- Footer --- */
.footer {
  padding: 60px 0 40px;
  border-top: 1px solid var(--border);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 16px;
  max-width: 300px;
}

.footer-col h4 {
  font-size: 0.82rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 18px;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 10px;
}

.footer-col a {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-col a:hover {
  color: var(--text-primary);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 32px;
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* --- Hero Proof Strip --- */
.hero-proof {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 24px;
  padding: 10px 16px;
  background: rgba(34, 197, 94, 0.06);
  border: 1px solid rgba(34, 197, 94, 0.15);
  border-radius: var(--radius-md);
  color: var(--success);
  font-size: 0.85rem;
  font-weight: 500;
  width: fit-content;
}

.hero-proof svg {
  flex-shrink: 0;
}

/* --- CTA Features --- */
.cta-features {
  display: flex;
  justify-content: center;
  gap: 36px;
  margin-bottom: 36px;
}

.cta-feature {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.cta-feature svg {
  color: var(--accent);
  flex-shrink: 0;
}

@media (max-width: 768px) {
  .cta-features {
    flex-direction: column;
    gap: 12px;
    align-items: center;
  }
}

/* --- Animations --- */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* --- Responsive --- */
@media (max-width: 1024px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .process-step:first-child { border-radius: var(--radius-lg) 0 0 0; }
  .process-step:nth-child(2) { border-radius: 0 var(--radius-lg) 0 0; }
  .process-step:nth-child(3) { border-radius: 0 0 0 var(--radius-lg); }
  .process-step:last-child { border-radius: 0 0 var(--radius-lg) 0; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .cta-section { padding: 60px 40px; }
}

@media (max-width: 768px) {
  :root { --gap: 16px; }

  .nav-links { display: none; }
  .nav-mobile-toggle { display: block; }

  .nav-links.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: 20px var(--gap);
    gap: 16px;
  }

  .hero { min-height: auto; padding: 120px 0 80px; }
  .hero-metrics { flex-direction: column; gap: 24px; }

  .services-grid { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: 1fr; }
  .process-step { border-radius: 0 !important; }
  .process-step:first-child { border-radius: var(--radius-lg) var(--radius-lg) 0 0 !important; }
  .process-step:last-child { border-radius: 0 0 var(--radius-lg) var(--radius-lg) !important; }
  .cases-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }

  .cta-section { padding: 48px 24px; }

  .quiz-body, .quiz-header, .quiz-progress { padding-left: 24px; padding-right: 24px; }
  .quiz-options-grid { grid-template-columns: 1fr; }

  .hero-actions { flex-direction: column; align-items: flex-start; }
  .btn-primary, .btn-secondary { width: 100%; justify-content: center; }

  section { padding: 80px 0; }
}

@media (max-width: 480px) {
  h1 { font-size: 2rem; }
  .hero-metric-value { font-size: 1.6rem; }
  .stack-grid { grid-template-columns: repeat(2, 1fr); }
  .quiz-container { border-radius: var(--radius-lg); }
}