:root {
  --bg: #fafafa;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --border: #e2e8f0;
  --radius: 16px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 24px;
}

/* Navigation */
nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  margin-bottom: 48px;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}
.logo-img {
  height: 1.25rem;
  width: auto;
  vertical-align: middle;
  /* margin-right:0.08rem; */
}

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

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
}

/* Hero Section (Homepage) */
.hero {
  text-align: center;
  padding: 64px 0;
  max-width: 700px;
  margin: 0 auto;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.1;
}

.hero p {
  font-size: 1.25rem;
  color: var(--muted);
  margin-bottom: 32px;
}

/* Card (Homepage) */
.card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 40px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  border: 1px solid var(--border);
  margin-bottom: 32px;
}

.card h2 {
  font-size: 1.75rem;
  margin-bottom: 16px;
}

.card p {
  color: var(--muted);
  margin-bottom: 16px;
  font-size: 1.05rem;
}

/* App Card (Soulful Page) */
.app-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 40px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  border: 1px solid var(--border);
  margin-bottom: 32px;
}

.app-header {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 24px;
}

.app-icon {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
}

.app-info h1 {
  font-size: 2.5rem;
  margin-bottom: 8px;
}

.app-info p {
  color: var(--muted);
  font-size: 1.1rem;
}

.description {
  color: var(--muted);
  font-size: 1.05rem;
  margin-bottom: 32px;
  line-height: 1.7;
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin: 32px 0;
}

.feature {
  display: flex;
  align-items: start;
  gap: 12px;
  padding: 16px;
  background: var(--bg);
  border-radius: 12px;
}

.feature-icon {
  font-size: 1.5rem;
  margin-top: 2px;
}

.feature-text {
  flex: 1;
}

.feature-text strong {
  display: block;
  margin-bottom: 4px;
  color: var(--text);
  font-size: 1.05rem;
}

.feature-text span {
  color: var(--muted);
  font-size: 0.9rem;
}

.privacy-note {
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  border-radius: 12px;
  padding: 20px;
  margin-top: 32px;
}

.privacy-note h3 {
  color: #15803d;
  margin-bottom: 8px;
  font-size: 1.1rem;
}

.privacy-note p {
  color: #166534;
  margin: 0;
}

/* Buttons */
.button-group {
  display: flex;
  gap: 12px;
  margin-top: 32px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.2s;
  border: none;
  cursor: pointer;
}

.btn-primary {
  background: var(--accent);
  color: white;
}

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

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

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

/* Support Section */
.support-section {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: var(--radius);
  padding: 48px;
  text-align: center;
  color: white;
  margin: 48px 0;
}

.support-section h2 {
  font-size: 2rem;
  margin-bottom: 12px;
}

.support-section p {
  font-size: 1.1rem;
  opacity: 0.95;
  margin-bottom: 24px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.btn-support {
  background: white;
  color: #667eea;
  font-weight: 700;
}

.btn-support:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
}

/* Privacy Policy Page */
.policy-container {
  max-width: 800px;
  margin: 0 auto;
}

.policy-header {
  text-align: center;
  margin-bottom: 48px;
}

.policy-header h1 {
  font-size: 2.5rem;
  margin-bottom: 12px;
}

.policy-header .date {
  color: var(--muted);
  font-size: 1rem;
}

.policy-intro {
  background: var(--card);
  border-radius: var(--radius);
  padding: 32px;
  margin-bottom: 24px;
  border: 1px solid var(--border);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.policy-intro p {
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.7;
}

details {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 16px;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

summary {
  padding: 20px 24px;
  cursor: pointer;
  font-weight: 600;
  font-size: 1.1rem;
  user-select: none;
  display: flex;
  align-items: center;
  gap: 12px;
  transition: background 0.2s;
}

summary:hover {
  background: var(--bg);
}

summary::before {
  content: "→";
  transition: transform 0.2s;
  color: var(--accent);
  font-weight: bold;
}

details[open] summary::before {
  transform: rotate(90deg);
}

details[open] summary {
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}

.policy-content {
  padding: 24px;
}

.policy-content p {
  margin-bottom: 16px;
  color: var(--muted);
  line-height: 1.7;
}

.policy-content p:last-child {
  margin-bottom: 0;
}

.policy-content strong {
  color: var(--text);
}

.policy-content ul {
  margin: 16px 0;
  padding-left: 24px;
}

.policy-content li {
  margin-bottom: 8px;
  color: var(--muted);
}

.policy-content a {
  color: var(--accent);
  text-decoration: none;
}

.policy-content a:hover {
  text-decoration: underline;
}

/* Footer */
footer {
  text-align: center;
  padding: 48px 0 24px;
  color: var(--muted);
  font-size: 0.9rem;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 16px;
}

.footer-links a {
  color: var(--muted);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--accent);
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2rem;
  }

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

  .nav-links {
    gap: 16px;
  }

  .card,
  .app-card {
    padding: 24px;
  }

  .app-header {
    flex-direction: column;
    align-items: start;
  }

  .app-info h1 {
    font-size: 2rem;
  }

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

  .button-group {
    flex-direction: column;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

  .support-section {
    padding: 32px 24px;
  }

  .policy-header h1 {
    font-size: 2rem;
  }

  .policy-intro,
  .policy-content {
    padding: 20px;
  }

  summary {
    padding: 16px 20px;
    font-size: 1rem;
  }
}