/* ============================================
   VZG AI Solutions - Premium Design System
   ============================================ */

:root {
  --color-bg: #050505;
  --color-bg-secondary: #0f0f0f;
  --color-bg-tertiary: #1a1a1a;
  --color-text: #ffffff;
  --color-text-secondary: #b3b3b3;
  --color-text-tertiary: #808080;
  --color-primary: #007aff;
  --color-primary-dark: #0051d5;
  --color-primary-light: #4db8ff;
  --color-accent: #8a2be2;
  --color-success: #34c759;
  --color-warning: #ff9500;
  --color-error: #ff3b30;
  --color-border: #2a2a2a;
  --color-border-light: #404040;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 24px 64px rgba(0, 0, 0, 0.6);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ============================================
   Typography
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  font-family: 'Manrope', sans-serif;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2rem, 5vw, 4rem); }
h2 { font-size: clamp(1.5rem, 4vw, 3rem); }
h3 { font-size: clamp(1.25rem, 3vw, 2rem); }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
  font-size: 1rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
}

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

a:hover {
  color: var(--color-primary-light);
}

/* ============================================
   Buttons
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 1.75rem;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: 0.75rem;
  cursor: pointer;
  transition: var(--transition);
  text-transform: none;
  letter-spacing: 0;
  white-space: nowrap;
  gap: 0.5rem;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: white;
  box-shadow: 0 4px 16px rgba(0, 122, 255, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 122, 255, 0.4);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-border-light);
}

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

.btn-full {
  width: 100%;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ============================================
   Navigation
   ============================================ */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(5, 5, 5, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition);
}

.navbar.scrolled {
  background: rgba(5, 5, 5, 0.95);
  box-shadow: var(--shadow-md);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
  cursor: pointer;
  transition: var(--transition);
}

.nav-logo:hover {
  color: var(--color-primary);
}

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  border-radius: 0.5rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: white;
}

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

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: var(--transition);
  position: relative;
}

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

.nav-link:hover {
  color: var(--color-text);
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  background: none;
  border: none;
  cursor: pointer;
  gap: 5px;
}

.nav-toggle span {
  width: 25px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: var(--transition);
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6rem 2rem 4rem;
  overflow: hidden;
  background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-bg-secondary) 100%);
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0, 122, 255, 0.1) 0%, transparent 70%);
  border-radius: 50%;
  animation: float 8s ease-in-out infinite;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(138, 43, 226, 0.1) 0%, transparent 70%);
  border-radius: 50%;
  animation: float 10s ease-in-out infinite reverse;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 900px;
  text-align: center;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, var(--color-text) 0%, var(--color-text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.1;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  margin-bottom: 2.5rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.8;
}

.hero-cta {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  margin-bottom: 4rem;
  flex-wrap: wrap;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 2rem;
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}

.stat {
  text-align: center;
}

.stat-number {
  display: block;
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.hero-visual {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.gradient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.3;
}

.orb-1 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, var(--color-primary), transparent);
  top: 10%;
  right: 5%;
  animation: float 8s ease-in-out infinite;
}

.orb-2 {
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, var(--color-accent), transparent);
  bottom: 10%;
  left: 5%;
  animation: float 10s ease-in-out infinite reverse;
}

/* ============================================
   Sections
   ============================================ */

section {
  position: relative;
  padding: 5rem 2rem;
  max-width: 1400px;
  margin: 0 auto;
}

.section-title {
  text-align: center;
  margin-bottom: 3.5rem;
  font-size: clamp(2rem, 4vw, 3rem);
}

/* ============================================
   Trusted By
   ============================================ */

.trusted-by {
  background: var(--color-bg-secondary);
  padding: 3rem 2rem;
}

.logo-marquee {
  overflow: hidden;
  background: var(--color-bg);
  border-radius: 1rem;
  padding: 2rem;
}

.marquee-content {
  display: flex;
  gap: 3rem;
  animation: marquee 20s linear infinite;
  white-space: nowrap;
}

.logo-item {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  opacity: 0.6;
  transition: var(--transition);
  flex-shrink: 0;
}

.logo-item:hover {
  opacity: 1;
  color: var(--color-primary);
}

/* ============================================
   Benefits
   ============================================ */

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.benefit-card {
  padding: 2.5rem;
  background: linear-gradient(135deg, var(--color-bg-secondary), var(--color-bg-tertiary));
  border: 1px solid var(--color-border);
  border-radius: 1rem;
  transition: var(--transition);
  text-align: center;
}

.benefit-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 122, 255, 0.15);
}

.benefit-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  display: block;
}

.benefit-card h3 {
  margin-bottom: 1rem;
  color: var(--color-text);
}

.benefit-card p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

/* ============================================
   Services
   ============================================ */

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.service-card {
  padding: 2.5rem;
  background: linear-gradient(135deg, rgba(0, 122, 255, 0.05), rgba(138, 43, 226, 0.05));
  border: 1px solid var(--color-border);
  border-radius: 1rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition);
}

.service-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 122, 255, 0.15);
}

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

.service-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  display: block;
}

.service-card h3 {
  margin-bottom: 1rem;
  color: var(--color-text);
}

.service-card p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

/* ============================================
   Prompt Packs
   ============================================ */

.prompt-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.prompt-card {
  padding: 2.5rem;
  background: linear-gradient(135deg, var(--color-bg-secondary), var(--color-bg-tertiary));
  border: 1px solid var(--color-border);
  border-radius: 1rem;
  transition: var(--transition);
  position: relative;
  display: flex;
  flex-direction: column;
}

.prompt-card.featured {
  border-color: var(--color-primary);
  transform: scale(1.02);
  box-shadow: 0 16px 48px rgba(0, 122, 255, 0.2);
}

.prompt-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 122, 255, 0.15);
}

.prompt-badge {
  position: absolute;
  top: -12px;
  left: 20px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: white;
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.prompt-card h3 {
  margin-top: 1rem;
  margin-bottom: 0.75rem;
  color: var(--color-text);
}

.prompt-description {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.prompt-features {
  list-style: none;
  margin-bottom: 2rem;
}

.prompt-features li {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--color-border);
}

.prompt-features li:last-child {
  border-bottom: none;
}

.prompt-price {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 1.5rem;
}

/* ============================================
   Timeline
   ============================================ */

.timeline {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  position: relative;
}

.timeline-item {
  padding: 2.5rem;
  background: linear-gradient(135deg, var(--color-bg-secondary), var(--color-bg-tertiary));
  border: 1px solid var(--color-border);
  border-radius: 1rem;
  transition: var(--transition);
  text-align: center;
}

.timeline-item:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 122, 255, 0.15);
}

.timeline-marker {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  border-radius: 50%;
  font-size: 1.5rem;
  font-weight: 700;
  color: white;
  margin-bottom: 1.5rem;
}

.timeline-item h3 {
  margin-bottom: 1rem;
  color: var(--color-text);
}

.timeline-item p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

/* ============================================
   Statistics
   ============================================ */

.statistics {
  background: linear-gradient(135deg, var(--color-bg-secondary), var(--color-bg-tertiary));
  border: 1px solid var(--color-border);
  border-radius: 1.5rem;
  padding: 4rem 2rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
}

.stat-box {
  text-align: center;
  padding: 2rem;
}

.stat-value {
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
  display: block;
}

.stat-name {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* ============================================
   Portfolio
   ============================================ */

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.portfolio-card {
  background: linear-gradient(135deg, var(--color-bg-secondary), var(--color-bg-tertiary));
  border: 1px solid var(--color-border);
  border-radius: 1rem;
  overflow: hidden;
  transition: var(--transition);
}

.portfolio-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 122, 255, 0.15);
}

.portfolio-image {
  width: 100%;
  height: 200px;
  background: linear-gradient(135deg, rgba(0, 122, 255, 0.1), rgba(138, 43, 226, 0.1));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  color: var(--color-text-secondary);
  overflow: hidden;
}

.placeholder-image {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(0, 122, 255, 0.15), rgba(138, 43, 226, 0.15));
  font-size: 1.1rem;
  font-weight: 600;
}

.portfolio-card:hover .placeholder-image {
  background: linear-gradient(135deg, rgba(0, 122, 255, 0.25), rgba(138, 43, 226, 0.25));
}

.portfolio-card h3 {
  padding: 1.5rem 1.5rem 0.75rem;
  color: var(--color-text);
}

.portfolio-card p {
  padding: 0 1.5rem 1rem;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
}

.portfolio-tag {
  display: inline-block;
  margin: 0 1.5rem 1.5rem;
  padding: 0.5rem 1rem;
  background: rgba(0, 122, 255, 0.1);
  color: var(--color-primary);
  border-radius: 0.5rem;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ============================================
   Testimonials
   ============================================ */

.testimonials-slider {
  position: relative;
  overflow: hidden;
  margin-bottom: 2rem;
}

.testimonial-card {
  padding: 2.5rem;
  background: linear-gradient(135deg, var(--color-bg-secondary), var(--color-bg-tertiary));
  border: 1px solid var(--color-border);
  border-radius: 1rem;
  min-height: 280px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  opacity: 0;
  transform: translateX(100%);
  transition: var(--transition-slow);
  position: absolute;
  width: 100%;
  top: 0;
  left: 0;
}

.testimonial-card.active {
  opacity: 1;
  transform: translateX(0);
  position: relative;
}

.testimonial-content p {
  font-size: 1.1rem;
  font-style: italic;
  color: var(--color-text);
  margin-bottom: 1.5rem;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.author-avatar {
  width: 3rem;
  height: 3rem;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: white;
  font-size: 0.9rem;
}

.author-name {
  font-weight: 600;
  color: var(--color-text);
  font-size: 0.95rem;
}

.author-title {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

.slider-controls {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-top: 2rem;
}

.slider-btn {
  width: 2.5rem;
  height: 2.5rem;
  border: 1px solid var(--color-border);
  background: var(--color-bg-secondary);
  color: var(--color-text);
  border-radius: 50%;
  cursor: pointer;
  transition: var(--transition);
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.slider-btn:hover {
  border-color: var(--color-primary);
  background: var(--color-bg-tertiary);
  color: var(--color-primary);
}

/* ============================================
   Pricing
   ============================================ */

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.pricing-card {
  padding: 2.5rem;
  background: linear-gradient(135deg, var(--color-bg-secondary), var(--color-bg-tertiary));
  border: 1px solid var(--color-border);
  border-radius: 1rem;
  transition: var(--transition);
  position: relative;
  display: flex;
  flex-direction: column;
}

.pricing-card.featured {
  border-color: var(--color-primary);
  transform: scale(1.05);
  box-shadow: 0 16px 48px rgba(0, 122, 255, 0.2);
}

.pricing-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 122, 255, 0.15);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 20px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: white;
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.pricing-card h3 {
  margin-bottom: 1.5rem;
  color: var(--color-text);
}

.price {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.price span {
  font-size: 1rem;
  color: var(--color-text-secondary);
  font-weight: 400;
}

.price-description {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  margin-bottom: 2rem;
}

.pricing-features {
  list-style: none;
  margin-bottom: 2rem;
  flex-grow: 1;
}

.pricing-features li {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--color-border);
}

.pricing-features li:last-child {
  border-bottom: none;
}

/* ============================================
   FAQ
   ============================================ */

.faq-container {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  margin-bottom: 1.5rem;
  border: 1px solid var(--color-border);
  border-radius: 1rem;
  overflow: hidden;
  background: linear-gradient(135deg, var(--color-bg-secondary), var(--color-bg-tertiary));
  transition: var(--transition);
}

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

.faq-question {
  width: 100%;
  padding: 1.5rem;
  background: none;
  border: none;
  color: var(--color-text);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition);
  text-align: left;
}

.faq-question:hover {
  color: var(--color-primary);
}

.faq-icon {
  font-size: 1.5rem;
  transition: var(--transition);
  color: var(--color-primary);
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: var(--transition-slow);
}

.faq-item.active .faq-answer {
  max-height: 500px;
}

.faq-answer p {
  padding: 0 1.5rem 1.5rem;
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

/* ============================================
   Contact Form
   ============================================ */

.contact-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.contact-info h3 {
  margin-bottom: 1rem;
  color: var(--color-text);
}

.contact-info p {
  margin-bottom: 1rem;
  color: var(--color-text-secondary);
}

.contact-details {
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}

.contact-details p {
  margin-bottom: 0.75rem;
  font-size: 0.95rem;
}

.contact-details strong {
  color: var(--color-text);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-group {
  position: relative;
  display: flex;
  flex-direction: column;
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 1rem;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: 0.75rem;
  color: var(--color-text);
  font-family: inherit;
  font-size: 1rem;
  transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-text-tertiary);
}

.form-group select {
  cursor: pointer;
}

.form-group select option {
  background: var(--color-bg-secondary);
  color: var(--color-text);
}

.error-message {
  font-size: 0.8rem;
  color: var(--color-error);
  margin-top: 0.25rem;
  display: none;
}

.form-group.error input,
.form-group.error select,
.form-group.error textarea {
  border-color: var(--color-error);
}

.form-group.error .error-message {
  display: block;
}

.form-notice {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  text-align: center;
}

/* ============================================
   Newsletter
   ============================================ */

.newsletter {
  text-align: center;
  padding: 4rem 2rem;
  background: linear-gradient(135deg, var(--color-bg-secondary), var(--color-bg-tertiary));
  border: 1px solid var(--color-border);
  border-radius: 1.5rem;
  margin: 0 auto;
  max-width: 600px;
}

.newsletter h2 {
  margin-bottom: 1rem;
  color: var(--color-text);
}

.newsletter > p {
  margin-bottom: 2rem;
  color: var(--color-text-secondary);
}

.newsletter-form {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.newsletter-form input {
  flex: 1;
  padding: 0.875rem 1rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 0.75rem;
  color: var(--color-text);
  font-size: 1rem;
  transition: var(--transition);
}

.newsletter-form input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
}

.newsletter-form input::placeholder {
  color: var(--color-text-tertiary);
}

.newsletter-form button {
  flex-shrink: 0;
}

.newsletter-notice {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

/* ============================================
   Footer
   ============================================ */

.footer {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  padding: 4rem 2rem 2rem;
  margin-top: 5rem;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  max-width: 1400px;
  margin: 0 auto 3rem;
}

.footer-section h4 {
  margin-bottom: 1rem;
  color: var(--color-text);
  font-size: 1rem;
}

.footer-section p {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

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

.footer-section ul li {
  margin-bottom: 0.75rem;
}

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

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

.social-links {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
}

.social-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  transition: var(--transition);
}

.social-links a:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  font-size: 0.85rem;
}

.footer-bottom p {
  margin-bottom: 0.5rem;
}

/* ============================================
   Animations
   ============================================ */

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(20px); }
}

@keyframes marquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.fade-in {
  animation: fadeIn 0.6s ease-out forwards;
}

.slide-in {
  animation: slideIn 0.6s ease-out forwards;
}

.scale-in {
  animation: scaleIn 0.6s ease-out forwards;
}

/* ============================================
   Responsive
   ============================================ */

@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg);
    flex-direction: column;
    gap: 0;
    padding: 1rem;
    border-bottom: 1px solid var(--color-border);
  }

  .nav-menu.active {
    display: flex;
  }

  .nav-toggle {
    display: flex;
  }

  .hero-cta {
    flex-direction: column;
  }

  .hero-cta .btn {
    width: 100%;
  }

  .contact-container {
    grid-template-columns: 1fr;
  }

  .newsletter-form {
    flex-direction: column;
  }

  .newsletter-form button {
    width: 100%;
  }

  .pricing-card.featured {
    transform: scale(1);
  }

  .prompt-card.featured {
    transform: scale(1);
  }

  .footer-content {
    grid-template-columns: 1fr;
  }

  section {
    padding: 3rem 1.5rem;
  }

  .section-title {
    margin-bottom: 2rem;
  }
}

@media (max-width: 480px) {
  .hero-stats {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .stat-number {
    font-size: 2rem;
  }

  .logo-marquee {
    padding: 1rem;
  }

  .marquee-content {
    gap: 1.5rem;
  }

  .logo-item {
    font-size: 0.85rem;
  }

  .slider-controls {
    gap: 0.5rem;
  }

  .slider-btn {
    width: 2rem;
    height: 2rem;
    font-size: 1rem;
  }
}

/* ============================================
   Accessibility
   ============================================ */

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media (prefers-color-scheme: light) {
  :root {
    --color-bg: #ffffff;
    --color-bg-secondary: #f9f9f9;
    --color-bg-tertiary: #f0f0f0;
    --color-text: #050505;
    --color-text-secondary: #4d4d4d;
    --color-text-tertiary: #808080;
    --color-border: #e0e0e0;
    --color-border-light: #d0d0d0;
  }
}