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

:root {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #06b6d4;
  --accent-hover: #22d3ee;
  --accent-dark: #0891b2;
  --border: #334155;
  --success: #10b981;
  --error: #ef4444;
}

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  min-height: 100vh;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.header {
  padding: 40px 0 20px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 16px;
}

.logo-icon {
  height: 56px;
  width: 56px;
}

.logo-text h1 {
  color: var(--accent);
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin: 0;
}

.tagline {
  color: var(--text-muted);
  font-size: 14px;
  margin: 0;
}

/* Hero Section */
.hero {
  padding: 40px 0 60px;
  text-align: center;
}

.hero h2 {
  color: var(--text-primary);
  font-size: 36px;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 16px;
}

.hero-description {
  color: var(--text-secondary);
  font-size: 18px;
  margin: 0 auto 40px;
  max-width: 600px;
}

/* Hero Image */
.hero-image {
  margin: 0 auto 40px;
  max-width: 100%;
}

.hero-image img {
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
  height: auto;
  max-width: 100%;
}

/* Download Section */
.download-section {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  margin: 0 auto;
  max-width: 600px;
  padding: 32px;
}

.download-section h3 {
  color: var(--text-primary);
  font-size: 20px;
  margin-bottom: 20px;
}

.download-buttons {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.download-btn {
  align-items: center;
  background: var(--accent);
  border: none;
  border-radius: 8px;
  color: var(--bg-primary);
  cursor: pointer;
  display: flex;
  font-size: 16px;
  font-weight: 600;
  gap: 8px;
  justify-content: center;
  padding: 14px 24px;
  text-decoration: none;
  transition: background-color 0.2s;
}

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

.download-btn .platform {
  color: var(--bg-secondary);
  font-size: 13px;
  font-weight: 400;
  opacity: 0.8;
}

.platform-note {
  color: var(--text-muted);
  font-size: 13px;
  margin-top: 16px;
}

/* Features Section */
.features {
  padding: 60px 0;
}

.features h3 {
  color: var(--text-primary);
  font-size: 24px;
  margin-bottom: 32px;
  text-align: center;
}

.feature-grid {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.feature {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
}

.feature-icon {
  font-size: 28px;
  margin-bottom: 12px;
}

.feature h4 {
  color: var(--accent);
  font-size: 16px;
  margin-bottom: 8px;
}

.feature p {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.5;
}

/* Feedback Section */
.feedback {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  margin: 40px 0;
  padding: 40px;
}

.feedback h3 {
  color: var(--text-primary);
  font-size: 24px;
  margin-bottom: 8px;
}

.feedback > p {
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.feedback-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-row {
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr 1fr;
}

@media (max-width: 600px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 14px;
  padding: 10px 12px;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  outline: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
}

.form-group textarea {
  resize: vertical;
}

.submit-btn {
  background: var(--accent);
  border: none;
  border-radius: 8px;
  color: var(--bg-primary);
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  margin-top: 8px;
  padding: 14px 24px;
  transition: background-color 0.2s;
}

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

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  margin-top: 40px;
  padding: 32px 0;
  text-align: center;
}

.footer p {
  color: var(--text-muted);
  font-size: 14px;
}

.footer-links {
  margin-top: 12px;
}

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

.footer-links a:hover {
  text-decoration: underline;
}

.footer-links .separator {
  color: var(--text-muted);
  margin: 0 8px;
}