/* CSS Design System & Variables */
:root {
  --font-heading: 'Plus Jakarta Sans', sans-serif;
  --font-body: 'Inter', sans-serif;

  /* Colors */
  --color-bg: #0b0f19;
  --color-bg-card: #131c2e;
  --color-bg-card-hover: #1b263f;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-hover: rgba(255, 255, 255, 0.15);
  
  --color-primary: #10b981; /* Emerald/Mint growth green */
  --color-secondary: #3b82f6; /* Trust blue */
  --color-accent: #8b5cf6; /* Indigo highlight */
  
  --color-text-main: #f8fafc;
  --color-text-muted: #94a3b8;
  
  --gradient-primary: linear-gradient(135deg, #10b981 0%, #3b82f6 100%);
  --gradient-hover: linear-gradient(135deg, #059669 0%, #2563eb 100%);
  --gradient-dark: linear-gradient(180deg, #131c2e 0%, #0b0f19 100%);
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 30px rgba(16, 185, 129, 0.2);

  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  
  --border-radius-sm: 8px;
  --border-radius-md: 16px;
  --border-radius-lg: 24px;
}

/* Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  scroll-behavior: smooth;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text-main);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  letter-spacing: -0.02em;
}

a {
  color: inherit;
  text-decoration: none;
}

/* Scrollbar Utility */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--color-bg);
}
::-webkit-scrollbar-thumb {
  background: #1e293b;
  border-radius: var(--border-radius-sm);
}
::-webkit-scrollbar-thumb:hover {
  background: #334155;
}

/* Common Layout Components */
.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.2);
  color: var(--color-primary);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 50px;
  margin-bottom: 20px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-weight: 600;
  padding: 14px 28px;
  border-radius: var(--border-radius-sm);
  transition: var(--transition-fast);
  cursor: pointer;
  border: none;
  font-size: 0.95rem;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.85rem;
  border-radius: 6px;
}

.btn-lg {
  padding: 18px 36px;
  font-size: 1.1rem;
}

.btn-primary {
  background: var(--gradient-primary);
  color: #ffffff;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background: var(--gradient-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(16, 185, 129, 0.3);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--color-border);
  color: var(--color-text-main);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--color-border-hover);
  transform: translateY(-2px);
}

/* Indus Appstore Download Badge */
.download-badge-indus {
  display: flex;
  align-items: center;
  gap: 12px;
  background: #1e293b;
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 10px 20px;
  border-radius: 12px;
  color: white;
  transition: all 0.2s ease;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}

.download-badge-indus:hover {
  background: #273549;
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.indus-icon {
  font-size: 1.8rem;
  color: var(--color-primary);
}

.indus-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.indus-sub {
  font-size: 0.65rem;
  text-transform: uppercase;
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
  font-weight: 500;
}

.indus-main {
  font-size: 1.05rem;
  font-family: var(--font-heading);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.indus-large {
  padding: 14px 28px;
  border-radius: 16px;
}

.indus-large .indus-icon {
  font-size: 2.2rem;
}

.indus-large .indus-main {
  font-size: 1.3rem;
}


/* Navbar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(11, 15, 25, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition-normal);
}

.navbar.scrolled {
  padding: 10px 0;
  background: rgba(11, 15, 25, 0.95);
  box-shadow: var(--shadow-sm);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.logo-img {
  width: 32px;
  height: 32px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--color-text-muted);
  transition: var(--transition-fast);
}

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

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-text-main);
  font-size: 1.5rem;
  cursor: pointer;
}

/* Hero Section */
.hero {
  padding: 160px 24px 80px;
  position: relative;
  background: radial-gradient(circle at 80% 20%, rgba(16, 185, 129, 0.08) 0%, transparent 40%),
              radial-gradient(circle at 10% 80%, rgba(59, 130, 246, 0.05) 0%, transparent 40%);
}

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 60px;
  align-items: center;
}

.hero-title {
  font-size: 3.5rem;
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -0.03em;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  margin-bottom: 40px;
  max-width: 600px;
}

.cta-group {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.hero-bullets {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.bullet-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
  font-weight: 500;
}

.bullet-item i {
  font-size: 1.2rem;
}

/* Interactive Phone Mockup Frame */
.hero-mockup {
  position: relative;
  display: flex;
  justify-content: center;
  perspective: 1000px;
}

.phone-frame {
  width: 280px;
  height: 570px;
  background: #1e293b;
  border: 10px solid #2d3748;
  border-radius: 40px;
  box-shadow: var(--shadow-lg), 0 0 0 2px rgba(255,255,255,0.05);
  position: relative;
  overflow: hidden;
  transition: transform 0.5s ease;
  transform-style: preserve-3d;
}

.phone-frame:hover {
  transform: rotateY(-5deg) rotateX(5deg);
}

.phone-speaker {
  width: 60px;
  height: 4px;
  background: #101520;
  border-radius: 10px;
  position: absolute;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 20;
}

.phone-screen {
  width: 100%;
  height: 100%;
  background: #000;
  position: relative;
  overflow: hidden;
}

.phone-status-bar {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 28px;
  padding: 0 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.7rem;
  color: #fff;
  z-index: 10;
  background: rgba(0, 0, 0, 0.4);
}

.phone-status-bar .icons {
  display: flex;
  gap: 4px;
}

.phone-home-bar {
  width: 100px;
  height: 4px;
  background: rgba(255, 255, 255, 0.5);
  border-radius: 10px;
  position: absolute;
  bottom: 8px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 20;
}

/* Screenshot Slider */
.slider-container {
  width: 100%;
  height: 100%;
  position: relative;
}

.slider {
  width: 100%;
  height: 100%;
  position: relative;
}

.slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity var(--transition-slow);
}

.slide.active {
  opacity: 1;
}

/* Slider Controls */
.slider-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(0, 0, 0, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: white;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 15;
  transition: var(--transition-fast);
  backdrop-filter: blur(4px);
}

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

.slider-btn.prev {
  left: 10px;
}

.slider-btn.next {
  right: 10px;
}

.slider-dots {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 6px;
  z-index: 15;
}

.dot {
  width: 6px;
  height: 6px;
  background: rgba(255, 255, 255, 0.4);
  border-radius: 50%;
  cursor: pointer;
  transition: var(--transition-fast);
}

.dot.active {
  background: var(--color-primary);
  width: 14px;
  border-radius: 10px;
}

.phone-reflection {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 50%);
  pointer-events: none;
  z-index: 18;
  border-radius: 40px;
}

/* Features Section */
.features {
  padding: 100px 24px;
  max-width: 1200px;
  margin: 0 auto;
  border-top: 1px solid var(--color-border);
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 60px;
}

.section-header h2 {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.section-header p {
  color: var(--color-text-muted);
  font-size: 1.1rem;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
}

.feature-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  padding: 36px;
  transition: var(--transition-normal);
}

.feature-card:hover {
  background: var(--color-bg-card-hover);
  border-color: var(--color-border-hover);
  transform: translateY(-8px);
  box-shadow: var(--shadow-md);
}

.feature-icon-wrapper {
  width: 60px;
  height: 60px;
  background: rgba(16, 185, 129, 0.08);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  color: var(--color-primary);
  margin-bottom: 24px;
  border: 1px solid rgba(16, 185, 129, 0.15);
}

.feature-card h3 {
  font-size: 1.3rem;
  margin-bottom: 12px;
}

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

/* How It Works - Sync Flow Animation */
.how-it-works {
  background: var(--gradient-dark);
  padding: 100px 24px;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  text-align: center;
}

.sync-container {
  max-width: 800px;
  margin: 50px auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  position: relative;
}

.sync-node {
  background: #1c273e;
  border: 1px solid var(--color-border);
  padding: 30px 40px;
  border-radius: var(--border-radius-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  width: 220px;
  transition: var(--transition-normal);
}

.sync-node:hover {
  border-color: var(--color-primary);
  transform: scale(1.03);
}

.node-icon {
  width: 70px;
  height: 70px;
  border-radius: 50%;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--color-primary);
}

.sync-node.drive .node-icon {
  background: rgba(59, 130, 246, 0.1);
  border-color: rgba(59, 130, 246, 0.2);
  color: var(--color-secondary);
}

.sync-flow {
  flex-grow: 1;
  height: 60px;
  position: relative;
  display: flex;
  align-items: center;
}

.flow-line {
  position: absolute;
  top: 50%;
  left: 0;
  width: 100%;
  height: 4px;
  background: rgba(255,255,255,0.05);
  transform: translateY(-50%);
  border-radius: 10px;
}

.flow-packets {
  width: 100%;
  height: 100%;
  position: relative;
  overflow: hidden;
}

.data-packet {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.2rem;
  color: var(--color-primary);
  opacity: 0;
  animation: movePacket 3s infinite linear;
}

.data-packet:nth-child(2) {
  animation-delay: 1.5s;
  color: var(--color-secondary);
}

@keyframes movePacket {
  0% {
    left: 0%;
    opacity: 0;
  }
  10% {
    opacity: 1;
  }
  90% {
    opacity: 1;
  }
  100% {
    left: 95%;
    opacity: 0;
  }
}

.sync-explanation {
  max-width: 600px;
  margin: 30px auto 0;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* Calculator Section */
.calculator-section {
  padding: 100px 24px;
  max-width: 1200px;
  margin: 0 auto;
}

.calculator-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.calc-visualizer {
  margin-top: 40px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.visualizer-bar-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.vis-label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

.vis-bar-container {
  height: 16px;
  background: rgba(255,255,255,0.05);
  border-radius: 50px;
  overflow: hidden;
}

.vis-bar {
  height: 100%;
  border-radius: 50px;
  transition: width 0.3s ease;
}

.invested-bar {
  background: #ffffff;
}

.returns-bar {
  background: var(--gradient-primary);
}

.vis-amount {
  font-size: 1.5rem;
  font-family: var(--font-heading);
  font-weight: 700;
}

.calc-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  padding: 40px;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
}

.calc-toggle {
  display: grid;
  grid-template-columns: 1fr 1fr;
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--color-border);
  padding: 4px;
  border-radius: 12px;
  margin-bottom: 30px;
}

.toggle-btn {
  background: none;
  border: none;
  color: var(--color-text-muted);
  font-weight: 600;
  padding: 12px;
  border-radius: 8px;
  cursor: pointer;
  transition: var(--transition-fast);
}

.toggle-btn.active {
  background: var(--color-bg-card-hover);
  color: var(--color-text-main);
  box-shadow: var(--shadow-sm);
}

.calc-inputs {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-bottom: 35px;
}

.input-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 8px;
}

.input-header label {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

.value-display {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--color-primary);
}

.slider-input {
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}

.slider-input::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-primary);
  cursor: pointer;
  border: 2px solid #ffffff;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-fast);
}

.slider-input::-webkit-slider-thumb:hover {
  transform: scale(1.25);
  box-shadow: 0 0 10px rgba(16, 185, 129, 0.5);
}

.calc-results {
  background: rgba(0, 0, 0, 0.15);
  border: 1px solid var(--color-border);
  padding: 24px;
  border-radius: var(--border-radius-md);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.result-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.result-value {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--color-text-main);
}

.total-row {
  border-top: 1px solid var(--color-border);
  padding-top: 16px;
  font-size: 1.1rem;
}

.total-row span {
  font-weight: 600;
}

.total-row .result-value {
  font-size: 1.5rem;
}

/* Download Section */
.download {
  background: linear-gradient(180deg, #0b0f19 0%, #060910 100%);
  padding: 100px 24px;
  border-top: 1px solid var(--color-border);
  text-align: center;
}

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

.download-container h2 {
  font-size: 3rem;
  margin-bottom: 20px;
  letter-spacing: -0.03em;
}

.download-container p {
  color: var(--color-text-muted);
  font-size: 1.15rem;
  margin-bottom: 48px;
}

.download-buttons {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 60px;
  flex-wrap: wrap;
}

.qr-container {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  padding: 24px;
  border-radius: var(--border-radius-md);
}

.qr-code {
  font-size: 6rem;
  color: var(--color-primary);
  width: 140px;
  height: 140px;
  background: white;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px;
}

.qr-container p {
  margin: 0;
  font-size: 0.85rem;
  font-weight: 500;
}

/* Footer */
.footer {
  background: #05080e;
  border-top: 1px solid var(--color-border);
  padding: 80px 24px 40px;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 60px;
  margin-bottom: 60px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.footer-logo img {
  width: 36px;
  height: 36px;
}

.footer-brand p {
  color: var(--color-text-muted);
  max-width: 400px;
  font-size: 0.95rem;
}

.footer-links {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.link-col {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.link-col h4 {
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #ffffff;
}

.link-col a {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  transition: var(--transition-fast);
}

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

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  border-top: 1px solid var(--color-border);
  padding-top: 30px;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

/* Responsive Design */
@media (max-width: 992px) {
  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 80px;
  }
  
  .hero-title {
    font-size: 2.8rem;
  }
  
  .cta-group {
    justify-content: center;
  }
  
  .hero-bullets {
    align-items: center;
  }
  
  .calculator-wrapper {
    grid-template-columns: 1fr;
    gap: 60px;
  }
  
  .footer-container {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 76px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 76px);
    background: var(--color-bg);
    flex-direction: column;
    padding: 40px 24px;
    gap: 24px;
    transition: var(--transition-normal);
    border-top: 1px solid var(--color-border);
  }
  
  .nav-menu.active {
    left: 0;
  }
  
  .nav-toggle {
    display: block;
  }
  
  .sync-container {
    flex-direction: column;
    gap: 40px;
  }
  
  .sync-node {
    width: 100%;
    max-width: 300px;
  }
  
  .sync-flow {
    width: 4px;
    height: 100px;
  }
  
  .flow-line {
    width: 4px;
    height: 100%;
    left: 50%;
    transform: translateX(-50%);
  }
  
  .data-packet {
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    animation: movePacketVertical 3s infinite linear;
  }
  
  .data-packet:nth-child(2) {
    animation-delay: 1.5s;
  }
}

@keyframes movePacketVertical {
  0% {
    top: 0%;
    opacity: 0;
  }
  10% {
    opacity: 1;
  }
  90% {
    opacity: 1;
  }
  100% {
    top: 95%;
    opacity: 0;
  }
}