/* ========================================
   BlindSpot Website - Shared Styles
   ======================================== */

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

:root {
  --primary: #5451D0;
  --primary-dark: #3F3CA0;
  --primary-light: #7B79E0;
  --accent: #A78BFA;
  --bg-dark: #0B0A1A;
  --bg-section: #110F26;
  --bg-card: #1A1835;
  --text-primary: #F0EFFF;
  --text-secondary: #A09FBF;
  --text-muted: #6B6A88;
  --border: #2A2850;
  --gradient-hero: linear-gradient(135deg, #0B0A1A 0%, #1A1040 50%, #0B0A1A 100%);
  --gradient-primary: linear-gradient(135deg, #5451D0, #7B79E0);
  --gradient-accent: linear-gradient(135deg, #5451D0, #A78BFA);
  --shadow-card: 0 4px 24px rgba(84, 81, 208, 0.08);
  --shadow-hover: 0 8px 40px rgba(84, 81, 208, 0.16);
  --radius: 12px;
  --radius-lg: 20px;
  --max-width: 1100px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN",
    "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

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

a:hover {
  color: var(--primary-light);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* --- Layout --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Header / Navigation --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(11, 10, 26, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

.logo img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

.site-header nav {
  display: flex;
  align-items: center;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
}

.nav-links a:hover {
  color: var(--text-primary);
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  margin: 5px 0;
  transition: var(--transition);
  border-radius: 2px;
}

/* --- Hero Section --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-hero);
  padding: 120px 24px 80px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -200px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(84, 81, 208, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero::after {
  content: "";
  position: absolute;
  bottom: -150px;
  left: -150px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(167, 139, 250, 0.1) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-content {
  text-align: center;
  max-width: 700px;
  position: relative;
  z-index: 1;
}

.hero-icon {
  width: 120px;
  height: 120px;
  border-radius: 28px;
  margin: 0 auto 12px;
  box-shadow: 0 12px 48px rgba(84, 81, 208, 0.3);
}

.developed-by {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-bottom: 32px;
}

.developed-by span {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

.chepics-logo {
  height: 20px;
  width: auto;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.hero h1 .highlight {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 40px;
  line-height: 1.9;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.appstore-badge {
  height: 54px;
  width: auto;
  transition: transform var(--transition), opacity var(--transition);
}

.appstore-badge:hover {
  transform: scale(1.05);
  opacity: 0.9;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: 0 4px 20px rgba(84, 81, 208, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(84, 81, 208, 0.4);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1.5px solid var(--border);
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary-light);
  transform: translateY(-2px);
}

/* --- Section Common --- */
.section {
  padding: 100px 0;
}

.section-alt {
  background: var(--bg-section);
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-header h2 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.section-header p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* --- Feature Cards --- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: all var(--transition);
}

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

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: var(--gradient-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 0.93rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* --- Privacy Highlight --- */
.privacy-banner {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px;
  text-align: center;
  margin-top: 60px;
}

.privacy-banner .icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.privacy-banner h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.privacy-banner p {
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto;
}

/* --- Bias List --- */
.bias-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
  margin-top: 40px;
}

.bias-tag {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 18px;
  font-size: 0.9rem;
  font-weight: 500;
  text-align: center;
  transition: all var(--transition);
}

.bias-tag:hover {
  border-color: var(--primary);
  background: rgba(84, 81, 208, 0.08);
}

/* --- CTA Section --- */
.cta-section {
  text-align: center;
  padding: 100px 0;
}

.cta-section h2 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.cta-section p {
  color: var(--text-secondary);
  margin-bottom: 36px;
  font-size: 1.05rem;
}

/* --- Footer --- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 48px 0 32px;
  background: var(--bg-dark);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 40px;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 12px;
  line-height: 1.7;
}

.footer-col h4 {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 10px;
}

.footer-col a {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-col a:hover {
  color: var(--text-primary);
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* --- Legal / Support Pages --- */
.page-hero {
  padding: 120px 0 60px;
  text-align: center;
  background: var(--gradient-hero);
}

.page-hero h1 {
  font-size: 2.2rem;
  font-weight: 800;
}

.page-hero p {
  color: var(--text-secondary);
  margin-top: 12px;
}

.page-body {
  padding: 60px 0 100px;
}

.page-body .container {
  max-width: 800px;
}

.legal-content h2 {
  font-size: 1.35rem;
  font-weight: 700;
  margin: 48px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.legal-content h2:first-child {
  margin-top: 0;
}

.legal-content h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 28px 0 10px;
}

.legal-content p,
.legal-content li {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 2;
}

.legal-content ul,
.legal-content ol {
  padding-left: 24px;
  margin: 12px 0;
}

.legal-content li {
  margin-bottom: 6px;
}

/* --- Support Page --- */
.support-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.support-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all var(--transition);
}

.support-card:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
}

.support-card .icon {
  font-size: 2rem;
  margin-bottom: 16px;
}

.support-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.support-card p {
  color: var(--text-secondary);
  font-size: 0.93rem;
}

.faq-section {
  margin-top: 60px;
}

.faq-item {
  border-bottom: 1px solid var(--border);
  padding: 24px 0;
}

.faq-item summary {
  font-weight: 600;
  font-size: 1.05rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.faq-item summary::after {
  content: "+";
  font-size: 1.4rem;
  color: var(--text-muted);
  transition: transform var(--transition);
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item .faq-answer {
  padding-top: 14px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.9;
}

/* --- Contact Banner --- */
.contact-banner {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px;
  text-align: center;
  margin-top: 48px;
}

.contact-banner h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 12px;
}

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

/* --- Responsive --- */
@media (max-width: 768px) {
  .site-header .container {
    position: relative;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: -24px;
    right: -24px;
    background: rgba(11, 10, 26, 0.97);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid var(--border);
  }

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

  .nav-toggle {
    display: block;
  }

  .hero {
    min-height: auto;
    padding: 130px 24px 70px;
  }

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

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

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .support-cards {
    grid-template-columns: 1fr;
  }

  .privacy-banner,
  .contact-banner {
    padding: 32px 20px;
  }

  .section {
    padding: 64px 0;
  }

  .section-header h2 {
    font-size: 1.6rem;
  }

  .bias-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.7rem;
  }

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

  .hero-actions {
    flex-direction: column;
  }
}