/* 
 * VerusFi Landing Page - Light Theme
 * Redesigned for clarity, contrast and modern aesthetics.
 * All sections are optimized for both desktop and mobile.
 */

:root {
  /* Brand colors */
  --color-primary: #00C853;
  --color-primary-dark: #00A043;
  --color-primary-light: #00E676;
  --color-secondary: #1B5E5E;
  --color-accent: #E0DFFF;
  --color-gradient-start: #00C853;
  --color-gradient-end: #7C4DFF;
  /* Neutral palette */
  --color-background: #FFFFFF;
  --color-surface: #F9FAFB;
  --color-text: #0A0E27;
  --color-text-muted: #4A5568;
  --color-border: #E2E8F0;
  /* Typography */
  --font-family-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --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-normal: 1.5;
  --line-height-relaxed: 1.75;
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  --spacing-4xl: 6rem;
  --spacing-5xl: 8rem;
  /* Rounding */
  --border-radius-sm: 0.25rem;
  --border-radius-md: 0.5rem;
  --border-radius-lg: 0.75rem;
  --border-radius-xl: 1rem;
  --border-radius-full: 9999px;
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 20px rgba(0, 200, 83, 0.3);
}

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

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

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

h1, h2, h3, h4, h5, h6 {
  color: var(--color-text);
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s ease-in-out;
}

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

strong {
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
}

/* Layout utilities */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  width: 100%;
}

section {
  padding: var(--spacing-5xl) 0;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: var(--color-background);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

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

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.5rem;
  font-weight: var(--font-weight-extrabold);
  color: var(--color-text);
  display: flex;
  align-items: center;
}

.logo-text {
  color: var(--color-text);
  font-weight: var(--font-weight-extrabold);
}

.logo-icon {
  color: var(--color-primary);
  font-weight: var(--font-weight-extrabold);
}

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

.nav-link {
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  transition: color 0.2s ease;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 0.875rem;
  font-weight: var(--font-weight-semibold);
  border-radius: var(--border-radius-lg);
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  text-align: center;
  white-space: nowrap;
}

.btn i {
  margin-right: 0.25rem;
}

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

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  box-shadow: var(--shadow-glow);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

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

.btn-lg {
  padding: var(--spacing-lg) var(--spacing-2xl);
  font-size: 1rem;
}

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 32px;
  height: 24px;
  background: none;
  border: none;
  cursor: pointer;
}

.hamburger {
  width: 100%;
  height: 2px;
  background-color: var(--color-text);
  transition: transform 0.3s ease;
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 72px;
    right: 0;
    flex-direction: column;
    gap: var(--spacing-md);
    background-color: var(--color-background);
    padding: var(--spacing-2xl);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-lg);
    border-left: 1px solid var(--color-border);
    width: 80%;
    max-width: 300px;
  }

  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

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

/* Hero */
.hero {
  padding-top: calc(var(--spacing-5xl) + 80px);
  padding-bottom: var(--spacing-5xl);
  background-color: var(--color-surface);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -20%;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(0, 200, 83, 0.1) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-4xl);
  align-items: center;
}

@media (max-width: 768px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

.hero-text {
  z-index: 1;
}

.hero-title {
  font-size: 3rem;
  font-weight: var(--font-weight-extrabold);
  margin-bottom: var(--spacing-lg);
  color: var(--color-text);
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.25rem;
  }
}

.hero-title .highlight {
  color: var(--color-primary);
}

.hero-description {
  font-size: 1.25rem;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-xl);
  line-height: var(--line-height-relaxed);
}

.hero-actions {
  display: flex;
  gap: var(--spacing-md);
}

@media (max-width: 768px) {
  .hero-actions {
    justify-content: center;
    flex-wrap: wrap;
  }
}

.hero-image img {
  width: 100%;
  height: auto;
  border-radius: var(--border-radius-xl);
}

/* Section headers */
.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-label {
  display: block;
  font-size: 0.75rem;
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-md);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.section-title {
  font-size: 2rem;
  margin-bottom: var(--spacing-lg);
  color: var(--color-text);
}

.section-title .highlight-blue {
  color: var(--color-secondary);
  font-weight: var(--font-weight-extrabold);
}

.centered {
  text-align: center;
}

.lead-text {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-xl);
}

/* Problem statement */
.problem-statement {
  background-color: var(--color-surface);
}

.problem-content {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

/* Solution */
.solution-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-4xl);
  align-items: center;
}

@media (max-width: 768px) {
  .solution-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

.solution-text .brand-name {
  color: var(--color-primary);
  font-weight: var(--font-weight-extrabold);
}

.solution-description {
  font-size: 1rem;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-lg);
  line-height: var(--line-height-relaxed);
}

.solution-image img {
  width: 100%;
  height: auto;
  border-radius: var(--border-radius-xl);
}

/* Mission */
.mission {
  background-color: var(--color-surface);
}

.mission-content {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

.mission-description {
  font-size: 1rem;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-lg);
  line-height: var(--line-height-relaxed);
}

.link-inline {
  color: var(--color-primary);
  font-weight: var(--font-weight-medium);
  transition: color 0.2s ease;
}

.link-inline:hover {
  color: var(--color-primary-light);
  text-decoration: underline;
}

/* How it works (What we build) */
.what-we-build {
  background-color: var(--color-background);
}

.build-content {
  max-width: 900px;
  margin: 0 auto;
}

/* What we offer / features */
.what-we-offer {
  background-color: var(--color-surface);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-2xl);
  margin-top: var(--spacing-3xl);
}

@media (max-width: 768px) {
  .features-grid {
    grid-template-columns: 1fr;
  }
}

.feature-card {
  background-color: var(--color-surface);
  padding: var(--spacing-2xl);
  border-radius: var(--border-radius-xl);
  border: 1px solid var(--color-border);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.feature-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(0, 200, 83, 0.1);
  border-radius: var(--border-radius-lg);
  margin-bottom: var(--spacing-lg);
  color: var(--color-primary);
}

.feature-icon svg {
  width: 24px;
  height: 24px;
}

.feature-title {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-md);
  color: var(--color-text);
}

.feature-description {
  font-size: 1rem;
  color: var(--color-text-muted);
  line-height: var(--line-height-relaxed);
}

/* Comparison section */
.comparison {
  background-color: var(--color-background);
}

.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-4xl);
  align-items: center;
}

@media (max-width: 768px) {
  .comparison-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

.comparison-title {
  font-size: 1.75rem;
  margin-bottom: var(--spacing-xl);
}

.old-world {
  color: var(--color-text-muted);
}

.new-world {
  color: var(--color-primary);
}

.comparison-image img {
  width: 100%;
  height: auto;
  border-radius: var(--border-radius-xl);
}

/* Statement */
.statement {
  background-color: var(--color-surface);
}

.statement-content {
  max-width: 1000px;
  margin: 0 auto;
  text-align: center;
}

.statement-title {
  font-size: 2.5rem;
  line-height: 1.2;
  color: var(--color-text);
}

@media (max-width: 768px) {
  .statement-title {
    font-size: 2rem;
  }
}

.gradient-text {
  background: linear-gradient(90deg, var(--color-gradient-start) 0%, var(--color-gradient-end) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: var(--font-weight-extrabold);
}

/* Community */
.community {
  background-color: var(--color-background);
}

.community-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-4xl);
  align-items: center;
}

@media (max-width: 768px) {
  .community-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

.community-description {
  font-size: 1rem;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-md);
  line-height: var(--line-height-relaxed);
}

.community-actions {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

/* Footer */
.footer {
  background-color: var(--color-surface);
  padding: var(--spacing-5xl) 0;
  text-align: center;
}

.footer-content {
  max-width: 900px;
  margin: 0 auto;
}

.footer-label {
  font-size: 0.75rem;
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--spacing-md);
}

.footer-title {
  font-size: 2rem;
  margin-bottom: var(--spacing-md);
  color: var(--color-text);
}

.footer-description {
  font-size: 1rem;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-xl);
  line-height: var(--line-height-relaxed);
}

.footer-actions {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--spacing-lg);
}

.footer-bottom {
  margin-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border);
  padding-top: var(--spacing-md);
}

.footer-bottom p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* Back to top button */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 40px;
  height: 40px;
  background-color: var(--color-primary);
  color: var(--color-background);
  border-radius: var(--border-radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease;
  z-index: 1000;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background-color: var(--color-primary-dark);
}

/* Animations */
[data-animate] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

[data-animate].animated {
  opacity: 1;
  transform: translateY(0);
}

[data-animate="fade-up"].animated {
  transform: translateY(0);
}

[data-animate="fade-left"].animated {
  transform: translateX(0);
}

[data-animate="fade-right"].animated {
  transform: translateX(0);
}

[data-animate="fade-left"] {
  transform: translateX(30px);
}

[data-animate="fade-right"] {
  transform: translateX(-30px);
}

[data-animate="zoom-in"] {
  transform: scale(0.95);
}

[data-animate="zoom-in"].animated {
  transform: scale(1);
}