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

:root {
  --primary: #6c5ce7;
  --primary-dark: #5a4bd1;
  --bg: #f8f9fa;
  --card-bg: #ffffff;
  --text: #2d3436;
  --text-light: #636e72;
  --border: #e0e0e0;
  --shadow: 0 8px 30px rgba(0,0,0,0.08);
  --radius: 16px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --bg: #1a1a2e;
  --card-bg: #16213e;
  --text: #eaeaea;
  --text-light: #a0a0b0;
  --border: #2a2a4a;
  --shadow: 0 8px 30px rgba(0,0,0,0.4);
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  transition: var(--transition);
  min-height: 100vh;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Navigation */
.navbar {
  background: var(--card-bg);
  backdrop-filter: blur(20px);
  box-shadow: 0 2px 20px rgba(0,0,0,0.05);
  position: sticky;
  top: 0;
  z-index: 1000;
  padding: 15px 0;
  transition: var(--transition);
}

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

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), #e17055);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  gap: 30px;
  align-items: center;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--text);
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: var(--transition);
}

.nav-links a:hover::after {
  width: 100%;
}

.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 5px;
}

.hamburger span {
  width: 28px;
  height: 3px;
  background: var(--text);
  border-radius: 3px;
  transition: var(--transition);
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 80px 20px 50px;
  background: linear-gradient(135deg, rgba(108,92,231,0.1), rgba(225,112,85,0.1));
  border-radius: 0 0 40px 40px;
}

.hero h1 {
  font-size: 2.8rem;
  font-weight: 800;
  margin-bottom: 15px;
  background: linear-gradient(135deg, var(--primary), #e17055);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.2rem;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto 30px;
}

/* Filters */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
  justify-content: center;
  align-items: center;
  margin: 30px 0;
}

.search-box {
  position: relative;
  flex: 1;
  min-width: 250px;
  max-width: 400px;
}

.search-box input {
  width: 100%;
  padding: 12px 20px 12px 45px;
  border: 2px solid var(--border);
  border-radius: 50px;
  background: var(--card-bg);
  color: var(--text);
  font-size: 1rem;
  transition: var(--transition);
  outline: none;
}

.search-box input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(108,92,231,0.15);
}

.search-box i {
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-light);
}

.platform-filters {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
}

.platform-btn {
  padding: 10px 24px;
  border: 2px solid var(--border);
  border-radius: 50px;
  background: var(--card-bg);
  color: var(--text);
  cursor: pointer;
  font-weight: 500;
  transition: var(--transition);
  font-size: 0.9rem;
}

.platform-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.platform-btn.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

/* Download Cards Grid */
.download-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 25px;
  padding: 20px 0;
}

.download-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 25px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.download-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.12);
}

.download-card .platform-badge {
  position: absolute;
  top: 15px;
  right: 15px;
  padding: 5px 15px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  color: white;
}

.platform-badge.windows {
  background: linear-gradient(135deg, #0078d4, #00a4ef);
}
.platform-badge.macos {
  background: linear-gradient(135deg, #333, #555);
}
.platform-badge.ios {
  background: linear-gradient(135deg, #000, #1a1a2e);
}
.platform-badge.android {
  background: linear-gradient(135deg, #3ddc84, #1a8d4a);
}

.download-card h3 {
  font-size: 1.3rem;
  margin-bottom: 8px;
  color: var(--text);
}

.download-card .version {
  color: var(--primary);
  font-weight: 600;
  margin-bottom: 10px;
  font-size: 0.95rem;
}

.download-card .meta {
  display: flex;
  gap: 15px;
  margin: 15px 0;
  flex-wrap: wrap;
}

.download-card .meta span {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-light);
  font-size: 0.85rem;
}

.download-card .meta i {
  color: var(--primary);
}

.download-card .rating {
  display: flex;
  align-items: center;
  gap: 5px;
  margin: 10px 0;
}

.download-card .rating .stars {
  color: #f1c40f;
}

.download-card .rating .avg {
  font-weight: 600;
  color: var(--text);
}

.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 30px;
  background: linear-gradient(135deg, var(--primary), #e17055);
  color: white;
  border: none;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  margin-top: 15px;
}

.download-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(108,92,231,0.4);
}

/* Review Section */
.review-form {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 30px;
  box-shadow: var(--shadow);
  margin: 40px 0;
  border: 1px solid var(--border);
}

.review-form h3 {
  font-size: 1.4rem;
  margin-bottom: 20px;
  color: var(--text);
}

.review-form .form-group {
  margin-bottom: 20px;
}

.review-form label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: var(--text);
}

.review-form input,
.review-form textarea,
.review-form select {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
  transition: var(--transition);
  outline: none;
}

.review-form input:focus,
.review-form textarea:focus,
.review-form select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(108,92,231,0.15);
}

.review-form textarea {
  min-height: 100px;
  resize: vertical;
}

.submit-btn {
  padding: 14px 40px;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition);
}

.submit-btn:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
}

/* Theme Toggle */
.theme-toggle {
  background: none;
  border: 2px solid var(--border);
  border-radius: 50px;
  padding: 8px 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
  font-size: 0.9rem;
  transition: var(--transition);
}

.theme-toggle:hover {
  border-color: var(--primary);
}

/* Language Selector */
.lang-select {
  padding: 8px 16px;
  border: 2px solid var(--border);
  border-radius: 50px;
  background: var(--card-bg);
  color: var(--text);
  cursor: pointer;
  font-size: 0.9rem;
  transition: var(--transition);
}

.lang-select:focus {
  border-color: var(--primary);
}

/* Footer */
.footer {
  background: var(--card-bg);
  border-top: 1px solid var(--border);
  padding: 40px 0;
  margin-top: 60px;
  text-align: center;
}

.footer p {
  color: var(--text-light);
  margin-bottom: 10px;
}

.footer a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--card-bg);
    flex-direction: column;
    padding: 20px;
    box-shadow: var(--shadow);
    border-radius: 0 0 var(--radius) var(--radius);
  }

  .nav-links.open {
    display: flex;
  }

  .hamburger {
    display: flex;
  }

  .hero h1 {
    font-size: 2rem;
  }

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

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

  .filters {
    flex-direction: column;
  }

  .search-box {
    max-width: 100%;
  }
}

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

.download-card {
  animation: fadeInUp 0.5s ease-out;
}

.download-card:nth-child(2) { animation-delay: 0.1s; }
.download-card:nth-child(3) { animation-delay: 0.2s; }
.download-card:nth-child(4) { animation-delay: 0.3s; }
.download-card:nth-child(5) { animation-delay: 0.4s; }

/* Stats */
.stats {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin: 40px 0;
  flex-wrap: wrap;
}

.stat-item {
  text-align: center;
  background: var(--card-bg);
  padding: 25px 40px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.stat-item .number {
  font-size: 2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), #e17055);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-item .label {
  color: var(--text-light);
  font-size: 0.9rem;
  margin-top: 5px;
}

/* Changelog */
.changelog {
  background: var(--card-bg);
  padding: 20px;
  border-radius: 10px;
  margin: 15px 0;
  border-left: 4px solid var(--primary);
  font-size: 0.9rem;
  color: var(--text-light);
}