/* ==========================================================================
   VoxMate Homepage - Simple & Compact Material Design 3 (Two-Tone Theme)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500;700&family=Roboto:wght@300;400;500;700&display=swap');

:root {
  /* Material Dark M3 - Two-Tone Palette */
  --bg-dark: #0d0d0d;
  --surface: #1a1a1a;
  --surface-variant: #262626;
  
  /* Primary Accent: Clean, vibrant Cyan/Teal (Simple & high contrast) */
  --primary: #00e5ff;
  --on-primary: #000000;
  
  --text-main: #ffffff;
  --text-muted: #b0b0b0;
  --border: #333333;
  
  /* Layout and shapes based on M3 */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-pill: 100px;
  
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.2);
  --shadow-md: 0 4px 8px rgba(0,0,0,0.3);
}

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

html {
  scroll-behavior: smooth;
  font-size: 15px;
}

body {
  font-family: 'Roboto', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", "Yu Gothic", "Meiryo", sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.5;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-weight: 500;
  line-height: 1.2;
}

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

/* Container */
.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header & Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
  box-shadow: var(--shadow-sm);
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-main);
}

.brand-logo img {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-sm);
}

.brand-gradient {
  color: var(--primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 20px;
  list-style: none;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: var(--transition);
}

.nav-link:hover {
  color: var(--primary);
}

/* Buttons (Material Flat & Filled styles) */
.btn-nav {
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  background: transparent;
  border: 1px solid var(--border);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-main);
  transition: var(--transition);
}

.btn-nav:hover {
  background: var(--surface-variant);
  border-color: var(--text-muted);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  background: var(--primary);
  color: var(--on-primary);
  font-weight: 700;
  font-size: 0.9rem;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  filter: brightness(1.1);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  background: var(--surface-variant);
  border: 1px solid var(--border);
  color: var(--text-main);
  font-weight: 500;
  font-size: 0.9rem;
  transition: var(--transition);
  cursor: pointer;
}

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

/* Badge tag */
.badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  background: rgba(0, 229, 255, 0.1);
  color: var(--primary);
  font-size: 0.8rem;
  font-weight: 500;
  margin-bottom: 16px;
  border: 1px solid rgba(0, 229, 255, 0.2);
}

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

.hero-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.hero-subtitle {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 30px;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.showcase-wrapper {
  max-width: 800px;
  margin: 0 auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.showcase-banner {
  width: 100%;
  display: block;
  object-fit: cover;
}

/* Sections Global */
.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto 40px;
}

.section-tag {
  color: var(--primary);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 8px;
  display: block;
}

.section-title {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Features Grid */
.features-section {
  padding: 60px 0;
  border-top: 1px solid var(--border);
}

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

.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: var(--transition);
}

.feature-card:hover {
  background: var(--surface-variant);
  border-color: var(--primary);
}

.feature-icon-box {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: rgba(0, 229, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--primary);
  margin-bottom: 16px;
}

.feature-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.feature-desc {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.5;
}

/* Download Section */
.download-section {
  padding: 60px 0;
  text-align: center;
}

.download-card {
  max-width: 700px;
  margin: 0 auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 30px;
}

.download-version {
  font-size: 0.85rem;
  color: var(--primary);
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 12px;
}

/* Footer */
.footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 40px 0 20px;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
  margin-bottom: 30px;
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-link:hover {
  color: var(--primary);
}

.footer-bottom {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
}

/* Responsive */
@media (max-width: 768px) {
  .hero-title { font-size: 2rem; }
  .nav-links { display: none; }
}