/* CSS Reset & Variable Definitions */
:root {
  --font-primary: 'Hind Siliguri', sans-serif;
  
  /* Color System */
  --bg-main: #0b0f19;
  --bg-card: #151d30;
  --bg-card-hover: #1e2942;
  --bg-header: rgba(11, 15, 25, 0.8);
  
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --text-inverse: #ffffff;
  
  --primary: #0284c7;
  --primary-hover: #0369a1;
  --secondary: #10b981;
  --secondary-hover: #059669;
  
  --border-color: rgba(148, 163, 184, 0.1);
  --border-focus: rgba(2, 132, 199, 0.5);
  
  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.5);
  
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --radius: 16px;
}

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

html {
  scroll-behavior: smooth;
}

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Typography */
h1 {
  font-size: 2.75rem;
  font-weight: 900;
  line-height: 1.25;
  color: #ffffff;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #ffffff 40%, #7dd3fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

h2 {
  font-size: 2.25rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 16px;
}

h3 {
  font-size: 1.5rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 12px;
}

p {
  color: var(--text-muted);
  font-size: 1.05rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-family: var(--font-primary);
  font-size: 1rem;
  font-weight: 700;
  border-radius: 12px;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  border: none;
}

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

.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(2, 132, 199, 0.4);
}

.btn-outline {
  background-color: transparent;
  color: var(--text-main);
  border: 2px solid var(--border-color);
}

.btn-outline:hover {
  background-color: rgba(255, 255, 255, 0.05);
  border-color: var(--text-main);
  transform: translateY(-2px);
}

.btn-block {
  display: flex;
  width: 100%;
}

/* Header */
.main-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: var(--bg-header);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: var(--transition);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  font-size: 1.35rem;
  color: #ffffff;
}

.logo-img {
  height: 44px;
  width: auto;
}

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

.main-nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: var(--transition);
}

.main-nav a:hover {
  color: #ffffff;
}

/* Hero Section */
.hero-section {
  padding: 160px 0 100px;
  background: radial-gradient(circle at 80% 20%, rgba(2, 132, 199, 0.15) 0%, transparent 50%),
              radial-gradient(circle at 20% 80%, rgba(16, 185, 129, 0.08) 0%, transparent 50%);
}

.hero-container {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 60px;
  align-items: center;
}

.hero-subtext {
  font-size: 1.2rem;
  margin-bottom: 32px;
  max-width: 600px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-bottom: 48px;
}

.hero-stats {
  display: flex;
  gap: 40px;
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-num {
  font-size: 2.25rem;
  font-weight: 900;
  color: var(--primary);
  line-height: 1.1;
}

.stat-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-muted);
}

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

.hero-screenshot-frame {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  transform: perspective(1000px) rotateY(-8deg) rotateX(4deg);
  transition: var(--transition);
  max-width: 520px;
  width: 100%;
}

.hero-screenshot-frame:hover {
  transform: perspective(1000px) rotateY(0deg) rotateX(0deg);
}

.hero-screenshot-img {
  width: 100%;
  height: auto;
  display: block;
}

/* Features Section */
.features-section {
  padding: 100px 0;
  background-color: rgba(255, 255, 255, 0.01);
  border-top: 1px solid var(--border-color);
}

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

.section-title p {
  font-size: 1.15rem;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

.feature-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 40px;
  transition: var(--transition);
}

.feature-card:hover {
  background-color: var(--bg-card-hover);
  transform: translateY(-5px);
  border-color: rgba(2, 132, 199, 0.3);
  box-shadow: var(--shadow-md);
}

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: 24px;
}

/* Steps Section */
.steps-section {
  padding: 100px 0;
  border-top: 1px solid var(--border-color);
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.step-card {
  position: relative;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 40px;
  text-align: center;
}

.step-num {
  position: absolute;
  top: -24px;
  left: 50%;
  transform: translateX(-50%);
  width: 48px;
  height: 48px;
  background-color: var(--primary);
  color: #ffffff;
  border-radius: 50%;
  font-weight: 900;
  font-size: 1.35rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 10px rgba(2, 132, 199, 0.4);
}

.step-card h3 {
  margin-top: 12px;
}

/* Details Section */
.details-section {
  padding: 100px 0;
  border-top: 1px solid var(--border-color);
}

.details-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
  align-items: center;
}

.lead-text {
  font-size: 1.15rem;
  margin-bottom: 30px;
  color: var(--text-main);
}

.bullet-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.bullet-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.bullet-check {
  color: var(--secondary);
  font-weight: 900;
  font-size: 1.25rem;
  background-color: rgba(16, 185, 129, 0.1);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.detail-visual-block {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 40px;
}

.feature-box h4 {
  font-size: 1.2rem;
  color: #ffffff;
  margin-bottom: 20px;
}

.feature-box ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.feature-box li {
  font-size: 1rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 12px;
}

.feature-box li span {
  font-size: 1.25rem;
}

/* FAQ Section */
.faq-section {
  padding: 100px 0;
  border-top: 1px solid var(--border-color);
  background-color: rgba(255, 255, 255, 0.005);
}

.faq-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
  max-width: 1000px;
  margin: 0 auto;
}

.faq-item {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 24px;
}

.faq-item h3 {
  font-size: 1.15rem;
  margin-bottom: 12px;
}

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

/* Contact Section */
.contact-section {
  padding: 100px 0;
  background: radial-gradient(circle at 50% 50%, rgba(37, 211, 102, 0.08) 0%, transparent 60%);
  border-top: 1px solid var(--border-color);
  text-align: center;
}

.whatsapp-card-wrapper {
  max-width: 700px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
}

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

.form-wrapper {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 40px;
  width: 100%;
  max-width: 500px;
  box-shadow: var(--shadow-lg);
}

.whatsapp-wrapper {
  text-align: center;
}

.whatsapp-desc {
  font-size: 1.05rem;
  margin-bottom: 30px;
  line-height: 1.7;
  color: var(--text-muted);
}

.btn-whatsapp {
  background-color: #25d366;
  color: #ffffff;
  font-size: 1.1rem;
  padding: 16px 32px;
  gap: 10px;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-whatsapp:hover {
  background-color: #20ba5a;
  box-shadow: 0 8px 25px rgba(37, 211, 102, 0.4);
  transform: translateY(-2px);
}

.wa-icon {
  font-size: 1.4rem;
}

/* Footer */
.main-footer {
  background-color: #05080e;
  border-top: 1px solid var(--border-color);
  padding: 40px 0;
  text-align: center;
}

.footer-container {
  display: flex;
  justify-content: center;
  align-items: center;
}

/* Responsive Styles */
@media (max-width: 992px) {
  h1 {
    font-size: 2.25rem;
  }
  
  .hero-container {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  
  .hero-visual {
    order: -1;
  }
  
  .details-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  
  .faq-list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .header-container {
    height: 70px;
  }
  
  .main-nav {
    display: none;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .steps-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }
}

/* Gallery Showcase */
.gallery-section {
  padding: 100px 0;
  border-top: 1px solid var(--border-color);
  background-color: rgba(255, 255, 255, 0.003);
}

.gallery-wrapper {
  max-width: 1000px;
  margin: 0 auto;
}

.gallery-tabs {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 48px;
  background-color: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  padding: 8px;
  border-radius: 50px;
  width: max-content;
  margin-left: auto;
  margin-right: auto;
}

.tab-btn {
  background: none;
  border: none;
  font-family: var(--font-primary);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-muted);
  padding: 10px 24px;
  border-radius: 40px;
  cursor: pointer;
  transition: var(--transition);
}

.tab-btn:hover {
  color: #ffffff;
}

.tab-btn.active {
  background-color: var(--primary);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(2, 132, 199, 0.3);
}

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

.tab-pane {
  display: none;
  opacity: 0;
  align-items: center;
  gap: 48px;
  transition: opacity 0.4s ease;
}

.tab-pane.active {
  display: flex;
  opacity: 1;
}

.showcase-img {
  width: 65%;
  max-width: 65%;
  height: auto;
  border-radius: 16px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}

.showcase-img.img-portrait {
  width: 300px;
  max-width: 300px;
  margin: 0 auto;
}

.tab-desc {
  flex: 1;
  max-width: 30%;
}

.tab-desc h3 {
  font-size: 1.6rem;
  margin-bottom: 16px;
}

.tab-desc p {
  font-size: 1.05rem;
  line-height: 1.7;
}

@media (max-width: 768px) {
  .gallery-tabs {
    display: none !important;
  }
  
  .gallery-content {
    display: flex;
    flex-direction: column;
    gap: 60px;
    padding: 30px 20px;
  }
  
  .tab-pane {
    display: flex !important;
    opacity: 1 !important;
    flex-direction: column;
    gap: 24px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 40px;
  }
  
  .tab-pane:last-child {
    border-bottom: none;
    padding-bottom: 0;
  }
  
  .showcase-img {
    width: 100% !important;
    max-width: 100% !important;
  }
  
  .showcase-img.img-portrait {
    width: 240px !important;
    max-width: 240px !important;
  }

  .tab-desc {
    max-width: 100% !important;
    text-align: center;
  }
}