:root {
  --bg-primary: #0a0e27;
  --bg-secondary: #1a1f3a;
  --accent: #00d4aa;
  --accent-hover: #00ffc8;
  --text: #ffffff;
  --text-secondary: #b0b8d4;
  --card-bg: rgba(26, 31, 58, 0.6);
  --shadow: rgba(0, 212, 170, 0.2);
}

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

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
  background-attachment: fixed;
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Header Styles */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 5%;
  background: rgba(10, 14, 39, 0.95);
  backdrop-filter: blur(10px);
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
  transition: all 0.3s ease;
}

header.scrolled {
  padding: 12px 5%;
  box-shadow: 0 4px 40px rgba(0, 212, 170, 0.15);
}

header .brand {
  display: flex;
  align-items: center;
  gap: 12px;
  z-index: 1001;
}

header .brand img {
  height: 40px;
  width: auto;
  transition: transform 0.3s ease;
}

header .brand:hover img {
  transform: scale(1.05);
}

header .brand span {
  font-size: 1.2rem;
  font-weight: 600;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Hamburger Menu */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 1001;
}

.hamburger span {
  width: 25px;
  height: 3px;
  background: var(--accent);
  border-radius: 3px;
  transition: all 0.3s ease;
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(7px, 7px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -7px);
}

/* Navigation */
header nav {
  display: flex;
  gap: 8px;
}

header nav a {
  color: var(--text);
  padding: 10px 20px;
  text-decoration: none;
  font-weight: 500;
  border-radius: 8px;
  transition: all 0.3s ease;
  position: relative;
}

header nav a::before {
  content: '';
  position: absolute;
  bottom: 8px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 60%;
  height: 2px;
  background: var(--accent);
  transition: transform 0.3s ease;
}

header nav a:hover {
  color: var(--accent);
  background: rgba(0, 212, 170, 0.1);
}

header nav a:hover::before {
  transform: translateX(-50%) scaleX(1);
}

/* Hero Section */
.hero {
  padding: 140px 5% 100px;
  text-align: center;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  position: relative;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 50% 50%, rgba(0, 212, 170, 0.1) 0%, transparent 70%);
  pointer-events: none;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  margin-bottom: 24px;
  font-weight: 700;
  line-height: 1.2;
  animation: fadeInUp 0.8s ease;
}

.hero p {
  font-size: clamp(1rem, 2.5vw, 1.3rem);
  max-width: 800px;
  margin: 0 auto 32px;
  color: var(--text-secondary);
  animation: fadeInUp 0.8s ease 0.2s both;
}

.hero strong {
  color: var(--accent);
  font-weight: 600;
}

.cta {
  display: inline-block;
  margin-top: 20px;
  padding: 16px 40px;
  background: linear-gradient(135deg, var(--accent) 0%, #00a88d 100%);
  color: #fff;
  text-decoration: none;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1.1rem;
  box-shadow: 0 8px 30px var(--shadow);
  transition: all 0.3s ease;
  animation: fadeInUp 0.8s ease 0.4s both;
}

.cta:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 40px var(--shadow);
  background: linear-gradient(135deg, var(--accent-hover) 0%, var(--accent) 100%);
}

/* Panels */
.panel {
  padding: 100px 5%;
  max-width: 1200px;
  margin: 0 auto;
}

.panel h2 {
  font-size: clamp(2rem, 4vw, 2.8rem);
  margin-bottom: 40px;
  text-align: center;
  background: linear-gradient(135deg, var(--text) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.panel h3 {
  font-size: 1.5rem;
  margin: 40px 0 20px;
  color: var(--accent);
}

.panel ul {
  list-style: none;
  max-width: 600px;
  margin: 0 auto;
}

.panel ul li {
  padding: 16px 20px;
  margin: 12px 0;
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  border-radius: 12px;
  border-left: 4px solid var(--accent);
  transition: all 0.3s ease;
}

.panel ul li:hover {
  transform: translateX(8px);
  box-shadow: 0 8px 30px rgba(0, 212, 170, 0.15);
}

/* Cards */
.card {
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  padding: 30px;
  margin: 20px 0;
  border-radius: 16px;
  border: 1px solid rgba(0, 212, 170, 0.2);
  transition: all 0.3s ease;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 40px rgba(0, 212, 170, 0.25);
  border-color: var(--accent);
}

/* Plans */
.plans {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.plans .card h3 {
  font-size: 1.8rem;
  margin: 0 0 20px 0;
  color: var(--accent);
  text-align: center;
}

.plans .card form {
  text-align: center;
}

/* Footer */
footer {
  background: rgba(10, 14, 39, 0.8);
  padding: 40px 5%;
  text-align: center;
  border-top: 1px solid rgba(0, 212, 170, 0.2);
}

footer .small {
  margin-bottom: 16px;
  color: var(--text-secondary);
}

.social-links a {
  color: var(--accent);
  text-decoration: none;
  margin: 0 8px;
  transition: all 0.3s ease;
}

.social-links a:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

/* Preloader */
#preloader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  transition: opacity 0.6s ease;
}

#preloader img {
  height: 100px;
  animation: pulse 1.5s infinite ease-in-out;
}

/* Animations */
@keyframes pulse {
  0%, 100% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.1);
    opacity: 0.7;
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Logo Theme Switching */
.logo.dark {
  display: none;
}

@media (prefers-color-scheme: dark) {
  .logo {
    display: none;
  }
  .logo.dark {
    display: inline;
  }
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  header nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 70%;
    max-width: 300px;
    height: 100vh;
    background: rgba(10, 14, 39, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 80px 30px 30px;
    gap: 0;
    transition: right 0.3s ease;
    box-shadow: -5px 0 30px rgba(0, 0, 0, 0.5);
  }

  header nav.active {
    right: 0;
  }

  header nav a {
    padding: 16px 20px;
    border-radius: 12px;
    width: 100%;
    text-align: left;
    font-size: 1.1rem;
  }

  header nav a::before {
    display: none;
  }

  .hero {
    padding: 120px 5% 80px;
    min-height: 90vh;
  }

  .panel {
    padding: 60px 5%;
  }

  .plans {
    grid-template-columns: 1fr;
  }

  header .brand span {
    font-size: 1rem;
  }

  header .brand img {
    height: 32px;
  }
}

@media (max-width: 480px) {
  header {
    padding: 12px 4%;
  }

  header .brand span {
    display: none;
  }

  .hero h1 {
    font-size: 1.8rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .cta {
    padding: 14px 32px;
    font-size: 1rem;
  }
}