:root {
  --bg-main: #0B0B12;
  --bg-card: rgba(255, 255, 255, 0.04);
  --bg-card-hover: rgba(255, 255, 255, 0.08);
  --border-line: rgba(255, 255, 255, 0.1);
  --primary-gradient: linear-gradient(135deg, #FF2A7A 0%, #8A2BE2 100%);
  --accent-glow: rgba(255, 42, 122, 0.35);
  --text-main: #FFFFFF;
  --text-muted: #9A9AB0;
  --max-width: 1200px;
  --radius: 16px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Plus Jakarta Sans', 'Noto Sans SC', sans-serif;
  scroll-behavior: smooth;
}

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

/* Header Navbar */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(11, 11, 18, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-line);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.5rem;
  font-weight: 800;
  color: #fff;
  text-decoration: none;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: var(--primary-gradient);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 15px var(--accent-glow);
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
}

.nav-links a:hover, .nav-links a.active {
  color: var(--text-main);
}

.nav-cta {
  background: var(--primary-gradient);
  color: #fff;
  padding: 0.6rem 1.4rem;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 600;
  box-shadow: 0 4px 20px var(--accent-glow);
  transition: var(--transition);
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(255, 42, 122, 0.5);
}

.mobile-menu-btn {
  display: none;
  font-size: 1.5rem;
  color: #fff;
  cursor: pointer;
}

main {
  padding-top: 100px;
  min-height: calc(100vh - 350px);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 3rem 1.5rem 5rem;
}

.section-title {
  text-align: center;
  margin-bottom: 3rem;
}

.section-title h2 {
  font-size: 2.5rem;
  font-weight: 800;
  background: linear-gradient(180deg, #FFFFFF 0%, #A5A5C7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 0.5rem;
}

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

/* Home Page Custom UI */
.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  padding: 2rem 0;
}

.hero-content h1 {
  font-size: 3.5rem;
  line-height: 1.15;
  font-weight: 800;
  margin-bottom: 1.5rem;
}

.hero-content h1 span {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-content p {
  font-size: 1.2rem;
  color: var(--text-muted);
  margin-bottom: 2.5rem;
}

.download-btns {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn-store {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg-card);
  border: 1px solid var(--border-line);
  padding: 0.8rem 1.5rem;
  border-radius: 12px;
  color: #fff;
  text-decoration: none;
  transition: var(--transition);
}

.btn-store:hover {
  background: var(--bg-card-hover);
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-3px);
}

.btn-store i {
  font-size: 1.8rem;
}

.btn-store-text {
  display: flex;
  flex-direction: column;
  text-align: left;
}

.btn-store-text span {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.btn-store-text strong {
  font-size: 1rem;
}

.hero-mockup {
  position: relative;
  display: flex;
  justify-content: center;
}

.mockup-card {
  width: 280px;
  height: 580px;
  background: #181824;
  border: 8px solid #2D2D3F;
  border-radius: 40px;
  box-shadow: 0 20px 50px rgba(0,0,0,0.6), 0 0 40px var(--accent-glow);
  overflow: hidden;
  position: relative;
}

.mockup-inner {
  width: 100%;
  height: 100%;
  background: url('https://picsum.photos/600/1200?random=1') center/cover;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 1.5rem;
}

/* Feature Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-line);
  padding: 2.5rem 2rem;
  border-radius: var(--radius);
  transition: var(--transition);
}

.feature-card:hover {
  background: var(--bg-card-hover);
  transform: translateY(-5px);
  border-color: rgba(255, 42, 122, 0.4);
}

.feature-icon {
  width: 60px;
  height: 60px;
  background: rgba(255, 42, 122, 0.1);
  color: #FF2A7A;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin-bottom: 1.5rem;
}

.feature-card h3 {
  font-size: 1.3rem;
  margin-bottom: 0.8rem;
}

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

/* Download Box */
.download-box {
  background: linear-gradient(135deg, rgba(255,42,122,0.1) 0%, rgba(138,43,226,0.1) 100%);
  border: 1px solid var(--border-line);
  border-radius: 24px;
  padding: 4rem 2rem;
  text-align: center;
  position: relative;
}

.qr-placeholder {
  width: 180px;
  height: 180px;
  background: #fff;
  margin: 2rem auto;
  padding: 10px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #000;
  font-weight: 700;
}

/* Text Article Container */
.text-content {
  background: var(--bg-card);
  border: 1px solid var(--border-line);
  border-radius: var(--radius);
  padding: 3rem;
  max-width: 900px;
  margin: 0 auto;
}

.text-content h3 {
  font-size: 1.5rem;
  margin: 2rem 0 1rem;
  color: #fff;
}

.text-content p {
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.text-content ul {
  color: var(--text-muted);
  margin-left: 1.5rem;
  margin-bottom: 1rem;
}

/* FAQ accordion */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-line);
  border-radius: 12px;
  margin-bottom: 1rem;
  overflow: hidden;
}

.faq-header {
  padding: 1.2rem 1.5rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
}

.faq-body {
  padding: 0 1.5rem 1.2rem;
  color: var(--text-muted);
  display: none;
}

.faq-item.open .faq-body {
  display: block;
}

/* Footer */
footer {
  background: #06060A;
  border-top: 1px solid var(--border-line);
  padding: 4rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand p {
  color: var(--text-muted);
  margin-top: 1rem;
  font-size: 0.95rem;
}

.footer-col h4 {
  margin-bottom: 1.2rem;
  font-size: 1.1rem;
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 0.8rem;
}

.footer-col a {
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition);
}

.footer-col a:hover {
  color: #fff;
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  color: var(--text-muted);
  font-size: 0.9rem;
}

@media (max-width: 992px) {
  .hero { grid-template-columns: 1fr; text-align: center; }
  .hero-content h1 { font-size: 2.8rem; }
  .download-btns { justify-content: center; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .mobile-menu-btn { display: block; }
  .nav-links.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: #0B0B12;
    padding: 2rem;
    border-bottom: 1px solid var(--border-line);
  }
  .footer-grid { grid-template-columns: 1fr; }
  .text-content { padding: 1.5rem; }
}