:root {
  /* Color Palette - Calm Theme */
  --color-primary: #4a90e2;
  --color-primary-dark: #357abd;
  --color-primary-light: #6ba3e8;
  --color-secondary: #5ba3f5;
  --color-accent: #7bb3f0;
  --color-dark: #2c3e50;
  --color-text: #2c3e50;
  --color-text-light: #6c757d;
  --color-background: #ffffff;
  --color-surface: #f8f9fa;
  --color-border: #e9ecef;
  --color-success: #28a745;

  /* Typography */
  --font-family-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-bold: 700;
  --font-weight-black: 900;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

  /* Transitions */
  --transition-fast: 0.15s ease-out;
  --transition-base: 0.25s ease-out;
}

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

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

body {
  font-family: var(--font-family-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-background);
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) var(--space-md);
}

.navbar-brand h2 {
  font-size: 1.5rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
}

.navbar-menu {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.nav-link {
  color: var(--color-text);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  transition: color var(--transition-fast);
  position: relative;
}

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

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

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

.navbar-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
  padding: var(--space-xs);
}

.navbar-toggle span {
  width: 25px;
  height: 3px;
  background: var(--color-text);
  margin: 3px 0;
  transition: all var(--transition-fast);
  border-radius: 2px;
}

/* Hero Section */
.hero-section {
  position: relative;
  min-height: 100vh;
  background: linear-gradient(135deg, #4a90e2 0%, #5ba3f5 100%);
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: 80px;
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  opacity: 0.1;
}

.hero-particles {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    radial-gradient(2px 2px at 20px 30px, rgba(255, 255, 255, 0.3), transparent),
    radial-gradient(1px 1px at 90px 40px, rgba(255, 255, 255, 0.1), transparent);
  background-repeat: repeat;
  background-size: 120px 120px;
  animation: particles-float 20s linear infinite;
}

@keyframes particles-float {
  0% { transform: translateY(0) rotate(0deg); }
  100% { transform: translateY(-100px) rotate(360deg); }
}

.hero-content {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.hero-text {
  color: white;
}

.hero-badge {
  display: inline-block;
  background: rgba(255, 255, 255, 0.2);
  color: white;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--space-md);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: var(--font-weight-black);
  line-height: 1.1;
  margin-bottom: var(--space-md);
}

.highlight {
  color: #7bb3f0;
  text-shadow: 0 2px 10px rgba(123, 179, 240, 0.3);
}

.hero-subtitle {
  font-size: 1.125rem;
  opacity: 0.95;
  line-height: 1.6;
  margin-bottom: var(--space-xl);
  max-width: 500px;
}

.hero-features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-sm);
  margin-bottom: var(--space-xl);
}

.hero-feature {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  background: rgba(255, 255, 255, 0.1);
  padding: var(--space-sm);
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.hero-cta {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-sm) var(--space-lg);
  font-size: 1rem;
  font-weight: var(--font-weight-bold);
  text-decoration: none;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
}

.btn--primary {
  background: white;
  color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  background: #f8f9fa;
}

.btn--outline {
  background: transparent;
  color: white;
  border: 2px solid rgba(255, 255, 255, 0.5);
}

.btn--outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: white;
}

.btn--lg {
  padding: var(--space-md) var(--space-xl);
  font-size: 1.125rem;
}

.btn--full-width {
  width: 100%;
}

/* Hero Visual */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-mockup {
  position: relative;
  animation: float 6s ease-in-out infinite;
}

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

.mockup-device {
  width: 300px;
  height: 600px;
  background: linear-gradient(135deg, #ffffff, #f8f9fa);
  border-radius: 30px;
  padding: 20px;
  box-shadow: 
    0 20px 60px rgba(0, 0, 0, 0.2),
    0 0 0 1px rgba(255, 255, 255, 0.1);
  position: relative;
}

.mockup-screen {
  width: 100%;
  height: 100%;
  background: #ffffff;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.06);
}

.mockup-content {
  padding: var(--space-sm);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.mockup-header {
  height: 50px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  border-radius: var(--radius-md);
  margin-bottom: var(--space-sm);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-sm);
}

.mockup-header::before {
  content: 'SeikouVerse';
  color: white;
  font-size: 14px;
  font-weight: var(--font-weight-bold);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.mockup-header::after {
  content: '● ● ●';
  color: white;
  font-size: 12px;
  letter-spacing: 2px;
}

.mockup-body {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  flex: 1;
}

.mockup-section {
  height: 50px;
  background: rgba(74, 144, 226, 0.1);
  border-radius: var(--radius-sm);
  position: relative;
  display: flex;
  align-items: center;
  padding: 0 var(--space-sm);
  border: 1px solid rgba(74, 144, 226, 0.2);
  animation: mockup-pulse 3s ease-in-out infinite;
}

.mockup-section::before {
  content: '';
  width: 60px;
  height: 8px;
  background: var(--color-primary);
  border-radius: 4px;
  opacity: 0.7;
}

.mockup-section::after {
  content: '';
  position: absolute;
  right: var(--space-sm);
  width: 20px;
  height: 20px;
  background: var(--color-primary);
  border-radius: 50%;
  opacity: 0.5;
}

@keyframes mockup-pulse {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 1; }
}

.hero-scroll-indicator {
  position: absolute;
  bottom: var(--space-lg);
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  color: rgba(255, 255, 255, 0.8);
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateY(0) translateX(-50%); }
  40% { transform: translateY(-10px) translateX(-50%); }
}

/* Section Styles */
section {
  padding: var(--space-3xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.section-badge {
  display: inline-block;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: white;
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--space-md);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.section-header h2 {
  font-size: clamp(1.875rem, 4vw, 2.5rem);
  font-weight: var(--font-weight-black);
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.section-header p {
  font-size: 1.125rem;
  color: var(--color-text-light);
  max-width: 600px;
  margin: 0 auto;
}

/* About Section */
.about-section {
  background: var(--color-surface);
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: start;
}

.about-text h3 {
  font-size: 1.875rem;
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

.about-text p {
  font-size: 1.125rem;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: var(--space-sm);
}

.about-advantages {
  display: grid;
  gap: var(--space-md);
}

.advantage-item {
  background: white;
  padding: var(--space-lg);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
}

.advantage-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}

.advantage-icon {
  font-size: 2rem;
  margin-bottom: var(--space-sm);
  display: block;
}

.advantage-item h4 {
  font-size: 1.25rem;
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.advantage-item p {
  color: var(--color-text-light);
  line-height: 1.6;
}

/* Services Section */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-lg);
}

.service-card {
  background: white;
  padding: var(--space-xl);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  text-align: center;
  transition: all var(--transition-base);
  position: relative;
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-primary);
}

.service-card.featured {
  border-color: var(--color-primary);
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: white;
  transform: scale(1.02);
}

.service-badge {
  position: absolute;
  top: -10px;
  right: var(--space-sm);
  background: var(--color-accent);
  color: white;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: var(--font-weight-bold);
}

.service-icon {
  font-size: 3rem;
  margin-bottom: var(--space-md);
  display: block;
}

.service-card h3 {
  font-size: 1.5rem;
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-sm);
}

.service-card p {
  color: var(--color-text-light);
  margin-bottom: var(--space-md);
  line-height: 1.6;
}

.service-card.featured p,
.service-card.featured h3 {
  color: white;
}

.service-features {
  list-style: none;
  text-align: left;
}

.service-features li {
  padding: var(--space-xs) 0;
  color: var(--color-text-light);
  position: relative;
  padding-left: var(--space-md);
}

.service-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: var(--font-weight-bold);
}

.service-card.featured .service-features li,
.service-card.featured .service-features li::before {
  color: white;
}

/* Stats Section */
.stats-section {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: white;
}

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

.stat-item {
  text-align: center;
  padding: var(--space-lg);
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: all var(--transition-base);
}

.stat-item:hover {
  transform: translateY(-4px);
  background: rgba(255, 255, 255, 0.15);
  box-shadow: var(--shadow-lg);
}

.stat-number {
  font-size: 3rem;
  font-weight: var(--font-weight-black);
  line-height: 1;
  margin-bottom: var(--space-xs);
  display: block;
}

.stat-plus {
  font-size: 1.5rem;
  font-weight: var(--font-weight-bold);
  color: #7bb3f0;
  display: inline;
}

.stat-label {
  font-size: 1rem;
  opacity: 0.9;
  font-weight: var(--font-weight-medium);
}

/* Portfolio Section */
.portfolio-section { 
  background: var(--color-surface); 
  padding: var(--space-3xl) 0;
}
.portfolio-grid { 
  display: grid; 
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr)); 
  gap: var(--space-xl); 
}
.portfolio-item { 
  background: white; 
  border-radius: var(--radius-xl); 
  overflow: hidden; 
  box-shadow: var(--shadow-sm); 
  transition: all var(--transition-base); 
  border: 1px solid var(--color-border);
}
.portfolio-item:hover { 
  transform: translateY(-8px); 
  box-shadow: var(--shadow-xl); 
  border-color: var(--color-primary);
}

/* Pricing Section */
.services-tabs { 
  background: var(--color-surface); 
  padding: var(--space-3xl) 0;
}
.tabs-wrapper { 
  display: flex; 
  gap: var(--space-sm); 
  flex-wrap: wrap; 
  justify-content: center; 
  margin-top: var(--space-lg);
}
.tab-btn { 
  background: white; 
  border: 2px solid var(--color-border); 
  color: var(--color-text); 
  padding: var(--space-sm) var(--space-md); 
  border-radius: var(--radius-lg); 
  cursor: pointer; 
  transition: all var(--transition-base);
  font-weight: var(--font-weight-medium);
}
.tab-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.tab-btn.active { 
  background: var(--color-primary); 
  color: white; 
  border-color: var(--color-primary);
}

.pricing-section {
  padding: 0 0 var(--space-3xl) 0;
}
.pricing-grid { 
  display: grid; 
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); 
  gap: var(--space-lg); 
}
.pricing-card { 
  background: white; 
  border: 2px solid var(--color-border); 
  border-radius: var(--radius-xl); 
  padding: var(--space-xl); 
  text-align: center; 
  transition: all var(--transition-base);
  position: relative;
}
.pricing-card:hover { 
  transform: translateY(-8px); 
  box-shadow: var(--shadow-xl);
  border-color: var(--color-primary);
}
.pricing-card.featured {
  border-color: var(--color-primary);
  transform: scale(1.05);
}
.pricing-card.featured:hover {
  transform: scale(1.05) translateY(-8px);
}
.pricing-badge {
  position: absolute;
  top: -15px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-primary);
  color: white;
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
}

/* Contact Section */
.contact-section { 
  background: var(--color-surface); 
  padding: var(--space-3xl) 0;
}
.contact-content { 
  display: grid; 
  grid-template-columns: 1fr 1fr; 
  gap: var(--space-2xl); 
  align-items: start;
}
.contact-form-wrapper { 
  background: white; 
  padding: var(--space-xl); 
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}
.form-control { 
  width: 100%; 
  padding: var(--space-sm); 
  border: 1px solid var(--color-border); 
  border-radius: var(--radius-md);
  font-size: 1rem;
  transition: all var(--transition-fast);
}
.form-control:focus { 
  outline: none;
  border-color: var(--color-primary); 
  box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1); 
}

/* Footer */
.footer { 
  background: var(--color-dark); 
  color: var(--color-surface); 
  padding: var(--space-2xl) 0; 
}

/* WhatsApp Float */
.whatsapp-float { 
  position: fixed; 
  bottom: 30px; 
  right: 30px; 
  width: 60px; 
  height: 60px; 
  background: #25D366; 
  color: white; 
  border-radius: 50%; 
  display: flex; 
  align-items: center; 
  justify-content: center; 
  z-index: 1000;
  text-decoration: none;
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-base);
}
.whatsapp-float:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-xl);
}

/* Responsive */
@media (max-width: 1024px) {
  .hero-content, .about-content { grid-template-columns: 1fr; gap: var(--space-xl); }
  .hero-text { text-align: center; }
  .services-grid { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
}

@media (max-width: 768px) {
  .navbar-menu { 
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: var(--space-md);
    box-shadow: var(--shadow-lg);
    border-top: 1px solid var(--color-border);
  }
  .navbar-menu.show {
    display: flex;
  }
  .navbar-toggle { display: flex; }
  .hero-features { grid-template-columns: 1fr; }
  .contact-content { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .tabs-wrapper { justify-content: center; }
  .tab-btn { font-size: 0.875rem; padding: var(--space-xs) var(--space-sm); }
}

@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr; }
  .mockup-device { width: 250px; height: 500px; }
  .hero-title { font-size: 2rem; }
  .section-header h2 { font-size: 1.75rem; }
  .services-grid { grid-template-columns: 1fr; }
  .portfolio-grid { grid-template-columns: 1fr; }
}