/* ============================================
   VpLab LTD - Premium Corporate Design System
   ============================================ */

/* ============ CSS Variables ============ */
:root {
  /* Colors */
  --color-primary: #2563EB;
  --color-primary-dark: #1E40AF;
  --color-primary-light: #3B82F6;

  --color-secondary: #0F172A;
  --color-secondary-light: #1E293B;

  --color-text-primary: #0F172A;
  --color-text-secondary: #475569;
  --color-text-tertiary: #94A3B8;

  --color-bg: #FFFFFF;
  --color-bg-light: #F8FAFC;
  --color-bg-dark: #0F172A;

  --color-border: #E2E8F0;
  --color-border-light: #F1F5F9;

  --color-success: #10B981;
  --color-warning: #F59E0B;
  --color-error: #EF4444;

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --font-size-xs: 0.75rem;     /* 12px */
  --font-size-sm: 0.875rem;    /* 14px */
  --font-size-base: 1rem;      /* 16px */
  --font-size-lg: 1.125rem;    /* 18px */
  --font-size-xl: 1.25rem;     /* 20px */
  --font-size-2xl: 1.5rem;     /* 24px */
  --font-size-3xl: 1.875rem;   /* 30px */
  --font-size-4xl: 2.25rem;    /* 36px */
  --font-size-5xl: 3rem;       /* 48px */

  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;

  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;

  /* Spacing */
  --spacing-xs: 0.25rem;   /* 4px */
  --spacing-sm: 0.5rem;    /* 8px */
  --spacing-md: 1rem;      /* 16px */
  --spacing-lg: 1.5rem;    /* 24px */
  --spacing-xl: 2rem;      /* 32px */
  --spacing-2xl: 3rem;     /* 48px */
  --spacing-3xl: 4rem;     /* 64px */
  --spacing-4xl: 6rem;     /* 96px */

  /* Border Radius */
  --radius-sm: 0.375rem;   /* 6px */
  --radius-md: 0.5rem;     /* 8px */
  --radius-lg: 0.75rem;    /* 12px */
  --radius-xl: 1rem;       /* 16px */
  --radius-full: 9999px;

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

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Layout */
  --container-max-width: 1200px;
  --section-padding-y: var(--spacing-4xl);
}

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

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

body {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  overflow-x: hidden;
}

/* ============ Typography ============ */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-md);
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); }
h5 { font-size: var(--font-size-xl); }
h6 { font-size: var(--font-size-lg); }

p {
  margin-bottom: var(--spacing-md);
  color: var(--color-text-secondary);
}

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

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

/* ============ Layout ============ */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.section {
  padding: var(--section-padding-y) 0;
}

.section-light {
  background-color: var(--color-bg-light);
}

.section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto var(--spacing-3xl);
}

.section-title {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-extrabold);
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.02em;
}

.section-description {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

/* ============ Navigation ============ */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition-normal);
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
}

.logo img {
  display: block;
}

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

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  list-style: none;
}

.nav-link {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  text-decoration: none;
  display: inline-block;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-primary);
  background-color: var(--color-bg-light);
}

.nav-link-cta {
  background-color: var(--color-primary);
  color: white !important;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-md);
  font-weight: var(--font-weight-semibold);
}

.nav-link-cta:hover {
  background-color: var(--color-primary-dark);
  color: white !important;
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(37, 99, 235, 0.3);
}

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
}

.mobile-menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text-primary);
  transition: all var(--transition-fast);
}

/* ============ Hero Section ============ */
.hero {
  padding: var(--spacing-4xl) 0;
  background: linear-gradient(135deg, #F8FAFC 0%, #EFF6FF 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.1) 0%, transparent 70%);
  border-radius: 50%;
}

.hero-content {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
  position: relative;
  z-index: 1;
}

.hero-title {
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-extrabold);
  line-height: 1.1;
  margin-bottom: var(--spacing-lg);
  letter-spacing: -0.03em;
}

.hero-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-2xl);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  margin-bottom: var(--spacing-xl);
}

.trust-strip {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
  font-weight: var(--font-weight-medium);
}

/* ============ Buttons ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  font-family: var(--font-primary);
  border-radius: var(--radius-lg);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-normal);
  text-decoration: none;
  white-space: nowrap;
}

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

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

.btn-outline {
  background-color: white;
  color: var(--color-primary);
  border-color: var(--color-border);
}

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

.btn-large {
  padding: var(--spacing-lg) var(--spacing-2xl);
  font-size: var(--font-size-lg);
}

/* ============ Services Grid ============ */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-3xl);
}

.service-card {
  background: white;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  transition: all var(--transition-normal);
}

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

.service-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-lg);
  color: white;
}

.service-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-md);
}

.service-description {
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-lg);
}

.service-link {
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.service-link:hover {
  gap: var(--spacing-sm);
}

/* ============ Compliance Notice ============ */
.compliance-notice {
  background: #FEF3C7;
  border: 1px solid #FDE047;
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
}

.compliance-notice p {
  color: var(--color-text-primary);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
  margin: 0;
}

.compliance-notice strong {
  color: #92400E;
}

/* ============ Features Grid ============ */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
}

.feature-item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--spacing-md);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-success), #059669);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
}

.feature-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin: 0;
}

.feature-description {
  color: var(--color-text-secondary);
  margin: 0;
}

/* ============ Process Steps ============ */
.process-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

.process-step {
  text-align: center;
}

.step-number {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
  color: white;
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-md);
}

.step-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-sm);
}

.step-description {
  color: var(--color-text-secondary);
  margin: 0;
}

.section-cta {
  text-align: center;
}

/* ============ CTA Section ============ */
.section-cta {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: white;
}

.cta-content {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

.cta-title {
  font-size: var(--font-size-4xl);
  color: white;
  margin-bottom: var(--spacing-md);
}

.cta-description {
  font-size: var(--font-size-lg);
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--spacing-xl);
}

.section-cta .btn-primary {
  background-color: white;
  color: var(--color-primary);
}

.section-cta .btn-primary:hover {
  background-color: var(--color-bg-light);
}

/* ============ Footer ============ */
.footer {
  background-color: var(--color-bg-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: var(--spacing-4xl) 0 var(--spacing-xl);
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1.5fr;
  gap: var(--spacing-3xl);
  margin-bottom: var(--spacing-3xl);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.footer-logo .logo-text {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: white;
}

.footer-description {
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
  margin: 0;
}

.footer-heading {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: white;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-md);
}

.footer-menu,
.footer-contact {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer-menu a,
.footer-contact a {
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}

.footer-menu a:hover,
.footer-contact a:hover {
  color: white;
}

.footer-company {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.company-details {
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
}

.company-address {
  margin-bottom: var(--spacing-md);
}

.company-info {
  color: rgba(255, 255, 255, 0.9);
  margin: 0;
}

.company-info strong {
  color: white;
}

/* ============ FAQ Styles ============ */
.faq-list {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.faq-item {
  background: white;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  transition: all var(--transition-normal);
}

.faq-item:hover {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-md);
}

.faq-question {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-md);
}

.faq-answer {
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin: 0;
}

.faq-answer a {
  color: var(--color-primary);
  text-decoration: underline;
}

.footer-bottom {
  padding-top: var(--spacing-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-disclaimer {
  font-size: var(--font-size-xs);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-md);
  padding: var(--spacing-md);
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--color-warning);
}

.footer-copyright {
  font-size: var(--font-size-xs);
  text-align: center;
  margin: 0;
}

/* ============ Responsive Design ============ */
@media (max-width: 1024px) {
  :root {
    --section-padding-y: var(--spacing-3xl);
  }

  .hero-title {
    font-size: var(--font-size-4xl);
  }

  .section-title {
    font-size: var(--font-size-3xl);
  }

  .footer-content {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: #FFFFFF;
    flex-direction: column;
    padding: var(--spacing-lg);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
    border-top: 1px solid var(--color-border);
    z-index: 999;
    max-height: calc(100vh - 70px);
    overflow-y: auto;
  }

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

  .nav-item {
    margin: 0;
    padding: 0;
    border-bottom: 1px solid var(--color-border);
  }

  .nav-item:last-child {
    border-bottom: none;
  }

  .nav-link {
    display: block;
    padding: var(--spacing-sm) 0;
    color: var(--color-text-primary);
    font-size: var(--font-size-base);
    font-weight: 500;
    background: none;
  }

  .nav-link.active {
    color: var(--color-primary);
    background: none;
  }

  .nav-link-cta {
    color: var(--color-primary) !important;
    font-weight: 600;
    background: none !important;
    padding: var(--spacing-sm) 0;
  }

  .mobile-menu-toggle {
    display: flex;
  }

  .mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
  }

  .hero {
    padding: var(--spacing-3xl) 0;
  }

  .hero-title {
    font-size: var(--font-size-3xl);
  }

  .hero-subtitle {
    font-size: var(--font-size-base);
  }

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

  .trust-strip {
    flex-wrap: wrap;
  }

  .services-grid,
  .features-grid,
  .process-steps {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

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

  .section-title {
    font-size: var(--font-size-2xl);
  }
}

/* ============ Utilities ============ */
.text-center {
  text-align: center;
}

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

/* ============ Form Messages ============ */
.form-message {
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-lg);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-relaxed);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  animation: slideIn 0.3s ease-out;
}

.form-message-success {
  background-color: #D1FAE5;
  color: #065F46;
  border: 2px solid #10B981;
}

.form-message-error {
  background-color: #FEE2E2;
  color: #991B1B;
  border: 2px solid #EF4444;
}

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

@media (max-width: 768px) {
  .form-message {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
  }
}

/* ============ Fixed Form Messages (Always Visible) ============ */
.form-message-fixed {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%) translateY(-100px);
  z-index: 9999;
  padding: 20px 30px;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 500;
  line-height: 1.5;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
  min-width: 320px;
  max-width: 600px;
  opacity: 0;
  transition: all 0.3s ease-out;
}

.form-message-fixed.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

.form-message-fixed.form-message-success {
  background: linear-gradient(135deg, #10B981 0%, #059669 100%);
  color: white;
  border: 2px solid #047857;
}

.form-message-fixed.form-message-error {
  background: linear-gradient(135deg, #EF4444 0%, #DC2626 100%);
  color: white;
  border: 2px solid #B91C1C;
}

.form-message-fixed button {
  color: white !important;
}

.form-message-fixed button:hover {
  opacity: 1 !important;
  transform: scale(1.2);
}

@media (max-width: 768px) {
  .form-message-fixed {
    top: 10px;
    left: 10px;
    right: 10px;
    transform: translateX(0) translateY(-100px);
    min-width: auto;
    max-width: none;
    padding: 16px 20px;
    font-size: 14px;
  }

  .form-message-fixed.show {
    transform: translateX(0) translateY(0);
  }
}

/* ============ Inline Form Messages (Above Submit Button) ============ */
.form-message-inline {
  margin-bottom: 20px;
  border-radius: 12px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
  animation: slideDown 0.3s ease-out;
}

.form-message-inline.form-message-success {
  background: linear-gradient(135deg, #10B981 0%, #059669 100%);
  color: white;
  border: 3px solid #047857;
}

.form-message-inline.form-message-error {
  background: linear-gradient(135deg, #EF4444 0%, #DC2626 100%);
  color: white;
  border: 3px solid #B91C1C;
}

.form-message-inline button:hover {
  opacity: 1 !important;
  transform: scale(1.1);
}

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

@media (max-width: 768px) {
  .form-message-inline {
    margin-bottom: 16px;
  }
  .form-message-inline > div {
    padding: 16px !important;
  }
  .form-message-inline span:first-child {
    font-size: 24px !important;
  }
  .form-message-inline > div > div:first-of-type {
    font-size: 16px !important;
  }
  .form-message-inline > div > div:last-of-type {
    font-size: 14px !important;
  }
}