/* ===== CSS Variables ===== */
:root {
  --primary: #0969da;
  --primary-hover: #0550ae;
  --bg: #0d1117;
  --bg-secondary: #161b22;
  --text: #c9d1d9;
  --text-muted: #8b949e;
  --border: #30363d;
  --accent: #58a6ff;
  --success: #3fb950;
  --warning: #d29922;
  --radius: 8px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: var(--primary);
  text-decoration: underline;
}

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 0;
}

/* ===== Header ===== */
header {
  background: var(--bg-secondary);
  padding: 16px 32px;
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

header span {
  font-size: 1.4rem;
  font-weight: 700;
  color: #fff;
  margin-right: auto;
  display: flex;
  align-items: center;
  gap: 6px;
}

header span ion-icon {
  color: var(--accent);
  font-size: 1.5rem;
}

header a {
  color: var(--text-muted);
  font-size: 0.95rem;
  padding: 6px 12px;
  border-radius: var(--radius);
  transition: background 0.2s, color 0.2s;
}

header a:hover {
  background: var(--border);
  color: #fff;
  text-decoration: none;
}

/* ===== Main ===== */
main {
  flex: 1;
  max-width: 1100px;
  width: 100%;
  margin: 0 auto;
  padding: 40px 24px;
}

/* ===== Hero Section ===== */
.hero {
  text-align: center;
  padding: 60px 20px;
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg) 100%);
  border-radius: var(--radius);
  margin-bottom: 48px;
  border: 1px solid var(--border);
}

.hero h2 {
  font-size: 2.4rem;
  color: #fff;
  margin-bottom: 16px;
}

.hero #desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 20px;
}

.hero #current-version {
  display: inline-block;
  background: var(--border);
  color: var(--success);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 24px;
}

.hero .btn-group {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

/* ===== Buttons ===== */
button, .btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.2s, background 0.2s;
}

button ion-icon, .btn ion-icon {
  font-size: 1.2rem;
}

button:hover, .btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--primary-hover);
}

.btn-secondary {
  background: var(--bg-secondary);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--border);
}

/* ===== Sections ===== */
section {
  margin-bottom: 48px;
}

section h2 {
  font-size: 1.6rem;
  color: #fff;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--border);
}

/* ===== About / README Content ===== */
#about-content {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  padding: 24px;
  border-radius: var(--radius);
  color: var(--text);
  max-width: 100%;
  overflow-x: auto;
}

#about-content h1, #about-content h2, #about-content h3,
#about-content h4, #about-content h5, #about-content h6 {
  color: #fff;
  margin-top: 24px;
  margin-bottom: 12px;
}

#about-content h1:first-child, #about-content h2:first-child {
  margin-top: 0;
}

#about-content p {
  margin-bottom: 16px;
}

#about-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
}

#about-content pre {
  background: var(--bg);
  padding: 16px;
  overflow: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  margin: 16px 0;
}

#about-content code {
  background: var(--bg);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
}

#about-content pre code {
  background: none;
  padding: 0;
}

#about-content table {
  border-collapse: collapse;
  width: 100%;
  margin: 16px 0;
}

#about-content table td, #about-content table th {
  border: 1px solid var(--border);
  padding: 10px 14px;
  text-align: left;
}

#about-content table th {
  background: var(--bg);
  color: #fff;
}

#about-content blockquote {
  border-left: 4px solid var(--accent);
  padding-left: 16px;
  margin: 16px 0;
  color: var(--text-muted);
}

#about-content ul, #about-content ol {
  margin: 16px 0;
  padding-left: 24px;
}

#about-content li {
  margin-bottom: 8px;
}

/* ===== Features Section ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.feature-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.feature-card.coming-soon {
  opacity: 0.7;
}

.feature-card .badge {
  display: inline-block;
  background: var(--warning);
  color: var(--bg);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 4px;
  margin-bottom: 8px;
  text-transform: uppercase;
}

.feature-card .badge.available {
  background: var(--success);
}

.feature-card h3 {
  color: #fff;
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.feature-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* ===== Footer ===== */
footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 24px 32px;
  text-align: center;
}

footer p {
  color: var(--text-muted);
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

footer ion-icon {
  color: var(--accent);
  font-size: 1rem;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  header {
    padding: 12px 16px;
    gap: 12px;
  }

  header span {
    font-size: 1.2rem;
  }

  header a {
    font-size: 0.85rem;
    padding: 4px 8px;
  }

  main {
    padding: 24px 16px;
  }

  .hero {
    padding: 40px 16px;
  }

  .hero h2 {
    font-size: 1.8rem;
  }

  section h2 {
    font-size: 1.3rem;
  }

  button, .btn {
    padding: 10px 18px;
    font-size: 0.95rem;
  }
}

@media (max-width: 480px) {
  header {
    flex-direction: column;
    text-align: center;
  }

  header span {
    margin-right: 0;
    margin-bottom: 8px;
  }

  .hero .btn-group {
    flex-direction: column;
  }

  .hero .btn-group button {
    width: 100%;
  }
}

/* ===== Loading Animation ===== */
@keyframes pulse {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 1; }
}

.loading {
  animation: pulse 1.5s ease-in-out infinite;
  color: var(--text-muted);
}