/* XENDrop Landing Page — index.html only */
:root {
  --orange: #f28c38;
  --orange-dark: #e07a28;
  --blue: #2563eb;
  --blue-light: #3b82f6;
  --black: #1a1a1a;
  --gray: #6b7280;
  --gray-light: #f3f4f6;
  --white: #ffffff;
  --radius: 14px;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
  --font: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  color: var(--black);
  background: var(--white);
  line-height: 1.6;
  overflow-x: hidden;
}

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

img {
  max-width: 100%;
  display: block;
}

.container {
  width: min(1140px, 92%);
  margin: 0 auto;
}

/* Header */
.nd-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid #eee;
}

.nd-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
  gap: 1rem;
}

.nd-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  font-size: 1.25rem;
}

.nd-logo img {
  width: 42px;
  height: 42px;
  border-radius: 10px;
}

.nd-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.nd-nav a {
  font-size: 0.95rem;
  color: var(--gray);
  transition: color 0.2s;
}

.nd-nav a:hover {
  color: var(--orange);
}

.nd-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.4rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: transform 0.2s, background 0.2s, box-shadow 0.2s;
}

.nd-btn:hover {
  transform: translateY(-2px);
}

.nd-btn-primary {
  background: var(--orange);
  color: var(--white);
  box-shadow: 0 4px 16px rgba(242, 140, 56, 0.35);
}

.nd-btn-primary:hover {
  background: var(--orange-dark);
}

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

.nd-btn-dark {
  background: var(--black);
  color: var(--white);
}

.nd-btn-blue {
  background: var(--blue);
  color: var(--white);
}

.nd-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
}

/* Hero */
.nd-hero {
  padding: 4rem 0 5rem;
}

.nd-hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.nd-hero-badge {
  display: inline-block;
  background: var(--gray-light);
  color: var(--orange);
  font-weight: 600;
  font-size: 0.85rem;
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  margin-bottom: 1rem;
}

.nd-hero h1 {
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.15;
  margin-bottom: 1rem;
}

.nd-hero h1 span {
  color: var(--orange);
}

.nd-hero p {
  color: var(--gray);
  font-size: 1.05rem;
  max-width: 520px;
  margin-bottom: 1.75rem;
}

.nd-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2rem;
}

.nd-hero-stats {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--gray);
  font-size: 0.9rem;
}

.nd-stat-dots {
  display: flex;
}

.nd-stat-dots span {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--orange), var(--blue));
  border: 2px solid var(--white);
  margin-left: -10px;
}

.nd-stat-dots span:first-child {
  margin-left: 0;
}

.nd-hero-visual {
  position: relative;
  text-align: center;
}

.nd-hero-visual .watermark {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: clamp(4rem, 12vw, 8rem);
  font-weight: 900;
  color: rgba(242, 140, 56, 0.08);
  letter-spacing: 0.2em;
  pointer-events: none;
  white-space: nowrap;
}

.nd-hero-visual img.hero-logo {
  width: min(320px, 80%);
  margin: 0 auto;
  border-radius: 24px;
  box-shadow: var(--shadow);
  position: relative;
  z-index: 1;
}

.nd-float-card {
  position: absolute;
  bottom: 10%;
  left: 0;
  background: var(--black);
  color: var(--white);
  padding: 1rem 1.25rem;
  border-radius: var(--radius);
  font-size: 0.85rem;
  box-shadow: var(--shadow);
  z-index: 2;
}

.nd-float-card strong {
  display: block;
  font-size: 1.1rem;
  color: var(--orange);
}

/* Section common */
.nd-section {
  padding: 4.5rem 0;
}

.nd-section-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-end;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.nd-section-head h2 {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
}

.nd-section-head p {
  color: var(--gray);
  max-width: 480px;
}

/* Features */
.nd-features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.nd-feature-card {
  background: var(--white);
  border: 1px solid #e5e7eb;
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: transform 0.25s, box-shadow 0.25s, background 0.25s;
  position: relative;
}

.nd-feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.nd-feature-card.active,
.nd-feature-card:hover {
  background: var(--black);
  color: var(--white);
  border-color: var(--black);
}

.nd-feature-card .icon {
  width: 44px;
  height: 44px;
  background: var(--orange);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  margin-bottom: 1rem;
}

.nd-feature-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.nd-feature-card p {
  font-size: 0.9rem;
  opacity: 0.85;
}

.nd-feature-arrow {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  color: var(--orange);
  font-size: 1.1rem;
}

/* How it works */
.nd-steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

.nd-step-card {
  background: var(--gray-light);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-align: center;
  transition: transform 0.2s;
}

.nd-step-card:hover {
  transform: translateY(-3px);
}

.nd-step-num {
  width: 48px;
  height: 48px;
  background: var(--blue);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  margin: 0 auto 1rem;
}

.nd-step-card h3 {
  font-size: 1rem;
  margin-bottom: 0.4rem;
}

.nd-step-card p {
  font-size: 0.85rem;
  color: var(--gray);
}

/* Use cases */
.nd-use-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

.nd-use-card {
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--white);
  border: 1px solid #e5e7eb;
  transition: box-shadow 0.2s;
}

.nd-use-card:hover {
  box-shadow: var(--shadow);
}

.nd-use-card .thumb {
  height: 120px;
  background: linear-gradient(135deg, var(--orange) 0%, var(--blue) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
}

.nd-use-card .body {
  padding: 1.25rem;
}

.nd-use-card h3 {
  font-size: 1rem;
  margin-bottom: 0.35rem;
}

.nd-use-card p {
  font-size: 0.85rem;
  color: var(--gray);
}

/* Download */
.nd-download {
  background: var(--gray-light);
}

.nd-download-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.nd-download-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 2rem;
  text-align: center;
  box-shadow: var(--shadow);
}

.nd-download-card.featured {
  background: var(--orange);
  color: var(--white);
}

.nd-download-card h3 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.nd-download-card p {
  margin-bottom: 1.5rem;
  opacity: 0.9;
}

/* Ticker */
.nd-ticker {
  background: var(--orange);
  color: var(--white);
  padding: 0.85rem 0;
  overflow: hidden;
}

.nd-ticker-track {
  display: flex;
  gap: 3rem;
  animation: nd-ticker-scroll 25s linear infinite;
  white-space: nowrap;
  font-weight: 600;
  font-size: 0.95rem;
}

@keyframes nd-ticker-scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* Testimonials */
.nd-testimonials {
  background: var(--black);
  color: var(--white);
  border-radius: var(--radius);
  padding: 3rem 2rem;
  text-align: center;
  margin: 0 auto;
  max-width: 900px;
}

.nd-testimonials .stars {
  color: var(--orange);
  font-size: 1.25rem;
  margin-bottom: 1rem;
}

.nd-testimonials blockquote {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  font-style: italic;
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

/* Footer */
.nd-footer {
  padding: 2.5rem 0;
  border-top: 1px solid #eee;
}

.nd-footer .container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.nd-footer p {
  color: var(--gray);
  font-size: 0.9rem;
}

.nd-social {
  display: flex;
  gap: 1rem;
}

.nd-social a {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gray-light);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}

.nd-social a:hover {
  background: var(--orange);
  color: var(--white);
}

/* Responsive */
@media (max-width: 992px) {
  .nd-hero-grid,
  .nd-features-grid,
  .nd-steps-grid,
  .nd-use-grid {
    grid-template-columns: 1fr 1fr;
  }

  .nd-steps-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.nd-developed {
  margin-top: 0.5rem;
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.85);
}

.nd-zynuh {
  margin-top: 1.5rem;
  padding: 1.25rem;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 16px;
  text-align: left;
  max-width: 640px;
}

.nd-zynuh h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  color: #a29bfe;
}

.nd-zynuh p {
  font-size: 0.9rem;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 1rem;
}

.nd-zynuh-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.nd-zynuh-links .nd-btn {
  font-size: 0.85rem;
  padding: 0.5rem 1rem;
}

@media (max-width: 768px) {
  .nd-menu-toggle {
    display: block;
  }

  .nd-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--white);
    padding: 1rem;
    border-bottom: 1px solid #eee;
  }

  .nd-nav.open {
    display: flex;
  }

  .nd-hero-grid,
  .nd-download-grid,
  .nd-features-grid,
  .nd-use-grid {
    grid-template-columns: 1fr;
  }

  .nd-hero-visual {
    order: -1;
  }

  .nd-float-card {
    position: static;
    margin-top: 1rem;
    display: inline-block;
  }
}