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

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: #0d0f12;
  color: #f4f4f4;
  line-height: 1.6;
}

/* Navbar */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.2rem 2rem;
  background: rgba(20, 22, 26, 0.9);
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(8px);
}

.logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: #00f5a0;
}

.navbar ul {
  list-style: none;
  display: flex;
  gap: 1.2rem;
}

.navbar a {
  color: #f4f4f4;
  text-decoration: none;
  font-size: 0.95rem;
  transition: color 0.2s ease;
}

.navbar a:hover,
.navbar a.nav-login:hover {
  color: #00f5a0;
}

.nav-login {
  font-weight: 500;
}

/* Hero */
.hero {
  min-height: 100vh;
  padding: 8rem 2rem 4rem;
  background: linear-gradient(135deg, #0d0f12, #1c1f26);
  display: flex;
  align-items: center;
}

.hero-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  gap: 3rem;
  flex-wrap: wrap;
  align-items: center;
}

.hero-text {
  flex: 1 1 320px;
}

.hero-text h1 {
  font-size: 2.6rem;
  margin-bottom: 1rem;
}

.hero-text h1 span {
  color: #00f5a0;
}

.hero-text p {
  margin-bottom: 1.5rem;
  font-size: 1.05rem;
  color: #d4d4d4;
}

.hero-note {
  margin-top: 0.75rem;
  font-size: 0.9rem;
  color: #a1a1aa;
}

.hero-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.btn {
  padding: 0.75rem 1.6rem;
  border-radius: 8px;
  border: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 0.95rem;
  text-decoration: none;
}

.btn.primary {
  background: #00f5a0;
  color: #0d0f12;
  transition: transform 0.15s ease, background 0.2s ease;
}

.btn.primary:hover {
  background: #00c97f;
  transform: translateY(-2px);
}

.btn.secondary {
  background: #1f2933;
  color: #f4f4f4;
  border: 1px solid #374151;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.btn.secondary:hover {
  background: #111827;
  border-color: #4b5563;
}

/* Hero video */
.hero-video {
  flex: 1 1 320px;
}

.video-frame {
  background: #111827;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 14px 35px rgba(0, 0, 0, 0.45);
}

.video-frame video,
.video-frame iframe {
  width: 100%;
  height: 260px;
  display: block;
}

.video-caption {
  margin-top: 0.75rem;
  font-size: 0.9rem;
  color: #a1a1aa;
}

/* Features */
.features {
  padding: 4.5rem 2rem;
  background: #1c1f26;
  text-align: center;
}

.features h2 {
  margin-bottom: 2rem;
  font-size: 2rem;
  color: #00f5a0;
}

.features-grid {
  max-width: 1050px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.8rem;
}

.feature-card {
  background: #2a2f38;
  padding: 1.6rem;
  border-radius: 10px;
  text-align: left;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.feature-card h3 {
  margin-bottom: 0.75rem;
  font-size: 1.1rem;
}

.feature-card p {
  font-size: 0.95rem;
  color: #d4d4d4;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 25px rgba(0, 0, 0, 0.35);
}

/* How it works */
.how-it-works {
  padding: 4.5rem 2rem;
  background: #0d0f12;
  text-align: center;
}

.how-it-works h2 {
  margin-bottom: 2rem;
  font-size: 2rem;
  color: #00f5a0;
}

.steps-grid {
  max-width: 1050px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.8rem;
}

.step-card {
  background: #1c1f26;
  padding: 1.8rem 1.5rem;
  border-radius: 10px;
  text-align: left;
  position: relative;
}

.step-number {
  position: absolute;
  top: 1rem;
  right: 1.2rem;
  font-size: 2.5rem;
  font-weight: bold;
  color: rgba(0, 245, 160, 0.15);
}

.step-card h3 {
  margin-bottom: 0.75rem;
  font-size: 1.1rem;
}

.step-card p {
  font-size: 0.95rem;
  color: #d4d4d4;
}

/* Demo */
.demo {
  padding: 4.5rem 2rem;
  background: #0d0f12;
  text-align: center;
}

.demo h2 {
  font-size: 2rem;
  color: #00f5a0;
  margin-bottom: 0.75rem;
}

.demo p {
  font-size: 0.98rem;
  color: #d4d4d4;
  max-width: 600px;
  margin: 0 auto 2rem;
}

.demo-box {
  margin: 0 auto;
  width: 80%;
  max-width: 650px;
  border-radius: 10px;
  overflow: hidden;
  background: #111827;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45);
}

.demo-box video,
.demo-box iframe {
  width: 100%;
  height: 335px;
  display: block;
}

/* Contact */
.contact {
  padding: 4.5rem 2rem;
  background: #1c1f26;
  text-align: center;
}

.contact h2 {
  font-size: 2rem;
  color: #00f5a0;
  margin-bottom: 0.75rem;
}

.contact-intro {
  max-width: 550px;
  margin: 0 auto 2rem;
  font-size: 0.98rem;
  color: #d4d4d4;
}

.contact form {
  max-width: 500px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact input,
.contact textarea {
  padding: 0.8rem;
  border: none;
  border-radius: 6px;
  font-size: 0.95rem;
  background: #111827;
  color: #f4f4f4;
}

.contact textarea {
  min-height: 130px;
  resize: vertical;
}

.contact button {
  background: #00f5a0;
  border: none;
  padding: 0.9rem;
  border-radius: 6px;
  color: #0d0f12;
  cursor: pointer;
  font-size: 0.98rem;
  transition: background 0.2s ease, transform 0.15s ease;
}

.contact button:hover {
  background: #00c97f;
  transform: translateY(-2px);
}

/* Footer */
footer {
  text-align: center;
  padding: 1.5rem;
  background: #0d0f12;
  font-size: 0.9rem;
  color: #aaa;
}

/* Responsive tweaks */
@media (max-width: 768px) {
  .navbar {
    padding: 0.9rem 1.2rem;
  }
  .hero {
    padding-top: 7rem;
  }
  .hero-text h1 {
    font-size: 2.1rem;
  }
}