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

:root {
  color-scheme: dark;
  --bg: #071426;
  --bg-alt: #101f3f;
  --surface: rgba(21, 46, 93, 0.85);
  --surface-strong: rgba(24, 53, 107, 0.95);
  --text: #f8fafc;
  --muted: #a1b2d7;
  --accent: #67d3ff;
  --accent-strong: #3ec1ff;
  --border: rgba(255, 255, 255, 0.08);
  --shadow: 0 30px 80px rgba(0, 0, 0, 0.35);
}

body {
  font-family: 'Poppins', Arial, sans-serif;
  background: radial-gradient(circle at top left, rgba(103, 211, 255, 0.12), transparent 22%),
    radial-gradient(circle at top right, rgba(255, 255, 255, 0.08), transparent 18%),
    linear-gradient(180deg, #091021 0%, #071426 100%);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
}

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

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

button {
  font: inherit;
  cursor: pointer;
}

nav {
  position: sticky;
  top: 0;
  z-index: 50;
  width: 100%;
  padding: 24px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  background: rgba(7, 20, 38, 0.7);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(16px);
}

.logo {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.04em;
}

img.logo {
  height: 100px;
  width: auto;
}

.logo-container {
  display: flex;
  align-items: center;
  gap: 16px;
}

.logo span {
  color: var(--accent);
}

nav ul {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
}

nav ul li a {
  font-size: 0.95rem;
  color: var(--muted);
  transition: color 0.2s ease;
}

nav ul li a:hover {
  color: var(--text);
}

.nav-cta {
  padding: 12px 20px;
  border-radius: 999px;
  background: rgba(62, 193, 255, 0.14);
  border: 1px solid rgba(62, 193, 255, 0.18);
  color: var(--text);
}

.hamburger {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.04);
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.hamburger span,
.hamburger span::before,
.hamburger span::after {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: var(--text);
}

.hamburger span::before,
.hamburger span::after {
  content: '';
  position: relative;
}

.hamburger span::before {
  top: -6px;
}

.hamburger span::after {
  top: 4px;
}

.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  padding: 96px 24px 24px;
  background: rgba(7, 20, 38, 0.96);
  backdrop-filter: blur(16px);
  flex-direction: column;
  gap: 18px;
  z-index: 60;
}

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

.mobile-menu a {
  color: var(--text);
  font-size: 1.1rem;
}

.hero {
  padding: 100px 32px 64px;
}

.hero-inner {
  max-width: 1240px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(320px, 1.1fr) minmax(300px, 0.9fr);
  gap: 40px;
  align-items: center;
}

.hero-text {
  display: grid;
  gap: 24px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  border-radius: 999px;
  background: rgba(62, 193, 255, 0.14);
  color: var(--accent);
  font-size: 1.1rem;
  font-weight: 600;
}

.hero-text h1 {
  font-size: clamp(2.6rem, 4vw, 4.4rem);
  line-height: 1.02;
  max-width: 620px;
}

.hero-text p {
  max-width: 620px;
  color: var(--muted);
  font-size: 1.03rem;
}

.hero-btns {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.btn-primary,
.btn-ghost {
  border: none;
  border-radius: 999px;
  padding: 16px 30px;
  font-weight: 600;
  transition: transform 0.25s ease, background 0.25s ease, color 0.25s ease;
}

.btn-primary {
  background: linear-gradient(135deg, #3ec1ff, #67d3ff);
  color: #071426;
}

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

.btn-ghost {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.13);
  color: var(--text);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.05);
}

.chat-window {
  padding: 24px;
  background: var(--surface);
  border-radius: 32px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow);
}

.chat-window .chat-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}

.chat-window .chat-avatar {
  width: 50px;
  height: 50px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: rgba(62, 193, 255, 0.16);
  font-size: 1.3rem;
}

.chat-window .chat-header-text strong {
  display: block;
  font-size: 1rem;
}

.chat-window .chat-header-text span {
  display: block;
  color: var(--muted);
  font-size: 0.92rem;
}

.chat-body {
  display: grid;
  gap: 16px;
}

.msg {
  max-width: 100%;
  padding: 16px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.msg.bot {
  background: rgba(255, 255, 255, 0.08);
}

.msg.user {
  background: rgba(62, 193, 255, 0.12);
}

.msg-clickable {
  cursor: pointer;
  transition: background 0.2s, transform 0.15s;
}

.msg-clickable:hover {
  background: rgba(62, 193, 255, 0.28);
  transform: scale(1.02);
}

.chat-greeting {
  margin: 0 0 4px 0;
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.9rem;
}

.chat-input-bar {
  margin-top: 24px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
}

.chat-input-bar input {
  width: 100%;
  padding: 14px 18px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
}

.chat-input-bar button {
  border-radius: 999px;
  background: var(--accent);
  color: #071426;
  border: none;
  padding: 14px 22px;
}

.section-inner {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 32px 80px;
}

.section-label {
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.75rem;
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(2rem, 3vw, 3rem);
  margin-bottom: 24px;
  line-height: 1.05;
}

.section-desc {
  max-width: 680px;
  color: var(--muted);
  font-size: 1rem;
}

.two-col {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px;
  align-items: start;
}

.highlight-card,
.future-card,
.cta-box,
.qr-placeholder,
.tech-tag,
.step {
  background: var(--surface);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 24px;
  padding: 24px;
}

.highlight-card {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.highlight-card .icon,
.future-card .icon {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: rgba(62, 193, 255, 0.16);
  display: grid;
  place-items: center;
  font-size: 1.2rem;
}

.highlight-card h3,
.future-card h4 {
  margin-bottom: 8px;
  font-size: 1.1rem;
}

.highlight-card p,
.future-card p {
  color: var(--muted);
}

.step {
  display: grid;
  gap: 18px;
  border-radius: 24px;
}

.step-num {
  width: fit-content;
  background: rgba(62, 193, 255, 0.1);
  color: var(--accent);
  padding: 8px 14px;
  border-radius: 999px;
  font-weight: 700;
}

.step-icon {
  font-size: 1.6rem;
}

.steps-grid {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.cta-section {
  padding-bottom: 80px;
}

.cta-box {
  text-align: left;
}

.cta-box h2 {
  margin: 0 0 14px;
}

.cta-box p {
  color: var(--muted);
  margin-bottom: 24px;
}

.qr-section {
  padding-bottom: 80px;
}

.qr-placeholder {
  min-height: 250px;
  display: grid;
  place-items: center;
  text-align: center;
  gap: 16px;
  color: var(--muted);
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.tech-tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 18px;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
}

.future-cards {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

footer {
  text-align: center;
  padding: 40px 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  color: var(--muted);
  font-size: 1.15rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.footer-social-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 18px;
  margin-top: 8px;
}

.footer-social-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: rgba(144, 169, 192, 0.6);
  text-decoration: none;
  font-size: 1.1rem;
  transition: color 0.2s;
}

.footer-social-link:hover { color: rgba(144, 169, 192, 1); }
.footer-social-link.footer-yt:hover { color: #ff0000; }
.footer-social-link.footer-tt:hover { color: #ffffff; }
.footer-social-link.footer-li:hover { color: #0a66c2; }
.footer-social-link.footer-decigi:hover { color: #6ea8d6; }

@media (max-width: 1100px) {
  .hero-inner,
  .two-col,
  .steps-grid,
  .tech-grid,
  .future-cards {
    grid-template-columns: 1fr;
  }
  nav {
    padding: 20px;
  }
  .hero {
    padding-top: 80px;
  }
}

@media (max-width: 780px) {
  nav ul {
    display: none;
  }
  .hamburger {
    display: flex;
  }
  .hero,
  .section-inner {
    padding: 24px;
  }
  .hero-inner {
    gap: 28px;
  }
  .chat-window {
    padding: 20px;
  }
  .hero-text h1 {
    font-size: 2.5rem;
  }
}