:root {
  --primary: #00c6c8;
  --primary-dark: #00a4a6;
  --bg: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
  --glass: rgba(255, 255, 255, 0.05);
  --border: rgba(255, 255, 255, 0.1);
  --text-muted: #bfc9cf;
}

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

body {
  font-family: "Inter", sans-serif;
  background: var(--bg);
  color: #fff;
  line-height: 1.6;
}

/* CONTAINER GLOBAL */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* HEADER */
.header {
  position: fixed;
  top: 0;
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 40px;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
}

.logo {
  height: 50px;
  width: auto;
}
img {
  max-width: 100%;
  display: block;
}

/* NAV */
.nav {
  display: flex;
  gap: 12px;
}

.nav-link {
  color: #fff;
  text-decoration: none;
  font-weight: 500;
  padding: 8px 0;
}

.nav-link:hover {
  color: var(--primary);
}

a {
  color: var(--primary);
  text-decoration: none;
}

/* BUTTONS PREMIUM */
.btn-primary {
  background: linear-gradient(135deg, var(--primary), #00e0e2);
  padding: 12px 22px;
  border-radius: 12px;
  color: #fff;
  font-weight: 600;
  border: none;
  transition: 0.2s;
  box-shadow: 0 4px 20px rgba(0, 198, 200, 0.3);
  text-decoration: none;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 198, 200, 0.5);
}

.btn-outline {
  border: 1px solid var(--border);
  padding: 12px 22px;
  border-radius: 12px;
  color: #fff;
  font-weight: 500;
  transition: 0.2s;
  background: rgba(255, 255, 255, 0.03);
  cursor: pointer;
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(0, 198, 200, 0.08);
}

/* HERO */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 120px 20px 60px;
  contain: layout style paint;
}

.hero h1 {
  font-size: clamp(36px, 5vw, 64px);
  margin-bottom: 20px;
  line-height: 1.1;
}

.hero p {
  max-width: 700px;
  margin-bottom: 30px;
  color: var(--text-muted);
  font-size: 18px;
}

.cta {
  display: flex;
  gap: 15px;
  flex-wrap: wrap;
  justify-content: center;
}

.trust {
  margin-top: 20px;
  font-size: 14px;
  opacity: 0.8;
}

/* SECTIONS */
section {
  margin-top: 80px;
}

h2 {
  text-align: center;
  margin-bottom: 20px;
  font-size: 28px;
}

/* SEO */
.seo p {
  max-width: 800px;
  margin: 10px auto;
  color: var(--text-muted);
  text-align: center;
}

/* GRID */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  margin-top: 30px;
}

.plan-card {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.plan-card .price {
  font-size: 2rem;
  margin: 0;
  color: var(--primary);
}

.plan-card ul {
  list-style: none;
  padding: 0;
  margin: 0;
  color: var(--text-muted);
}

.plan-card li {
  margin: 8px 0;
}

.actions {
  display: flex;
  justify-content: center;
  gap: 15px;
  flex-wrap: wrap;
  margin-top: 24px;
}

/* CARDS PREMIUM */
.card {
  background: var(--glass);
  padding: 25px;
  border-radius: 16px;
  transition: 0.25s;
  border: 1px solid transparent;
  backdrop-filter: blur(6px);
}

.card:hover {
  transform: translateY(-6px);
  border-color: var(--primary);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.card h3 {
  margin-bottom: 10px;
}

.card p {
  color: var(--text-muted);
}

/* SIGNUP */
.signup {
  text-align: center;
  padding: 80px 20px;
}

.signup h2 {
  margin-bottom: 20px;
}

/* INPUTS PREMIUM */
input {
  padding: 14px 16px;
  border-radius: 12px;
  border: 1px solid var(--border);
  margin: 8px;
  width: 260px;
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
  transition: 0.2s;
  outline: none;
}

input::placeholder {
  color: #888;
}

input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(0, 198, 200, 0.2);
}

/* BUTTON SIGNUP */
#signupBtn {
  margin-top: 10px;
  padding: 14px 26px;
  border-radius: 12px;
  border: none;
  background: linear-gradient(135deg, var(--primary), #00e0e2);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
  transition: 0.2s;
}

#signupBtn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 198, 200, 0.4);
}

/* MESSAGE */
#msg {
  margin-top: 15px;
  min-height: 20px;
  color: var(--primary);
}

/* FOOTER */
footer {
  padding: 40px 20px;
  color: #aaa;
  font-size: 14px;
  margin-top: 80px;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 20px;
  max-width: 1200px;
  margin: 0 auto 24px;
}

.footer-column h3 {
  color: #fff;
  margin-bottom: 10px;
  font-size: 16px;
}

.footer-column a {
  display: block;
  margin-bottom: 10px;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-column a:hover {
  color: var(--primary);
}

footer p {
  text-align: center;
  margin-top: 20px;
}

.subtitle {
  text-align: center;
  color: var(--text-muted);
  margin-bottom: 20px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.services .grid {
  margin-top: 30px;
}

/* ULTRA LARGE SCREENS */
@media (min-width: 1600px) {
  main {
    max-width: 1400px;
  }

  .hero h1 {
    font-size: 72px;
  }

  .hero p {
    font-size: 20px;
  }
}