:root {
  --color-host: #82B690;
  --color-host-dark: #6CA07A;
  --color-cohost: #2F88EB;
  --color-cohost-dark: #246BBA;
  --color-text: #1a1a24;
  --color-text-light: #646473;
  --color-bg: #FFFFFF;
  --color-bg-alt: #F8F9FA;
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

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

h1, h2, h3, h4 {
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* NAVBAR */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 24px 0;
  z-index: 1000;
  transition: var(--transition);
}

header.scrolled {
  padding: 16px 0;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 20px rgba(0,0,0,0.05);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 24px;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo span {
  background: linear-gradient(135deg, var(--color-host), var(--color-cohost));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links {
  display: flex;
  gap: 32px;
  align-items: center;
}

.nav-links a {
  font-weight: 500;
  color: var(--color-text-light);
  transition: var(--transition);
}

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

.btn {
  display: inline-block;
  padding: 14px 28px;
  border-radius: 50px;
  font-weight: 600;
  text-align: center;
  transition: var(--transition);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background-color: var(--color-host);
  color: white;
  box-shadow: 0 8px 16px rgba(130, 182, 144, 0.3);
}

.btn-primary:hover {
  background-color: var(--color-host-dark);
  transform: translateY(-2px);
  box-shadow: 0 12px 20px rgba(130, 182, 144, 0.4);
}

.btn-secondary {
  background-color: var(--color-cohost);
  color: white;
  box-shadow: 0 8px 16px rgba(47, 136, 235, 0.3);
}

.btn-secondary:hover {
  background-color: var(--color-cohost-dark);
  transform: translateY(-2px);
  box-shadow: 0 12px 20px rgba(47, 136, 235, 0.4);
}

/* HERO SECTION */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 120px;
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: -10%;
  right: -10%;
  width: 60%;
  height: 120%;
  background: radial-gradient(circle, rgba(130,182,144,0.1) 0%, rgba(255,255,255,0) 70%);
  z-index: -1;
}

.hero-bg-2 {
  position: absolute;
  bottom: -10%;
  left: -10%;
  width: 50%;
  height: 80%;
  background: radial-gradient(circle, rgba(47,136,235,0.08) 0%, rgba(255,255,255,0) 70%);
  z-index: -1;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.hero-text h1 {
  font-size: 64px;
  margin-bottom: 24px;
}

.hero-text h1 span {
  position: relative;
}

.hero-text h1 span.host-highlight {
  color: var(--color-host);
}

.hero-text h1 span.cohost-highlight {
  color: var(--color-cohost);
}

.hero-text p {
  font-size: 20px;
  color: var(--color-text-light);
  margin-bottom: 40px;
  max-width: 500px;
}

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

.hero-image {
  position: relative;
  animation: float 6s ease-in-out infinite;
}

.hero-image img {
  width: 100%;
  max-width: 600px;
  border-radius: 40px;
  box-shadow: 0 30px 60px rgba(0,0,0,0.1);
}

/* FEATURES SPLIT */
.split-section {
  padding: 120px 0;
  background-color: var(--color-bg-alt);
}

.split-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.split-text h2 {
  font-size: 40px;
  margin-bottom: 24px;
}

.split-host h2 { color: var(--color-host-dark); }
.split-cohost h2 { color: var(--color-cohost); }

.split-text p {
  font-size: 18px;
  color: var(--color-text-light);
  margin-bottom: 32px;
}

.feature-list {
  list-style: none;
}

.feature-list li {
  margin-bottom: 16px;
  font-size: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.split-host .feature-list li i { color: var(--color-host); }
.split-cohost .feature-list li i { color: var(--color-cohost); }

.split-image img {
  width: 100%;
  border-radius: 30px;
  box-shadow: 0 20px 40px rgba(0,0,0,0.08);
  transition: transform 0.5s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.split-image:hover img {
  transform: scale(1.02);
}

/* DOWNLOAD SECTION */
.download-section {
  padding: 120px 0;
  text-align: center;
  position: relative;
  background: linear-gradient(135deg, #1a1a24, #0f0f14);
  color: white;
  overflow: hidden;
}

.download-bg {
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  background: url('assets/mockup.png') center/cover;
  opacity: 0.15;
  filter: blur(5px);
}

.download-content {
  position: relative;
  z-index: 2;
  max-width: 700px;
  margin: 0 auto;
}

.download-content h2 {
  font-size: 48px;
  margin-bottom: 24px;
}

.download-content p {
  font-size: 20px;
  color: #A0A0B0;
  margin-bottom: 48px;
}

.store-buttons {
  display: flex;
  justify-content: center;
  gap: 24px;
}

.store-btn {
  display: flex;
  align-items: center;
  gap: 16px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  padding: 16px 32px;
  border-radius: 20px;
  color: white;
  transition: var(--transition);
  backdrop-filter: blur(10px);
}

.store-btn:hover {
  background: rgba(255,255,255,0.2);
  transform: translateY(-5px);
}

.store-btn i {
  font-size: 32px;
}

.store-text {
  text-align: left;
}

.store-text span {
  display: block;
  font-size: 12px;
  color: #A0A0B0;
}

.store-text strong {
  font-size: 20px;
}

/* FOOTER */
footer {
  padding: 60px 0 30px;
  background: #FFFFFF;
  text-align: center;
  color: var(--color-text-light);
}

.footer-logo {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: 24px;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 32px;
  margin-bottom: 40px;
}

@keyframes float {
  0% { transform: translateY(0px); }
  50% { transform: translateY(-20px); }
  100% { transform: translateY(0px); }
}

/* MOBILE RESPONSIVE */
@media (max-width: 900px) {
  .hero-content, .split-container {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero-text h1 { font-size: 48px; }
  .hero-buttons { justify-content: center; }
  .store-buttons { flex-direction: column; align-items: center; }
  .feature-list { display: inline-block; text-align: left; }
  
  .split-image {
    grid-row: 1;
  }
}