@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Outfit:wght@500;600;700;800&display=swap');

/* --- Layer ordering and resets --- */
@layer reset, base, theme, components, utilities;

@layer reset {
  *, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }

  html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
  }

  body {
    min-block-size: 100vh;
    text-rendering: optimizeSpeed;
    line-height: 1.6;
  }

  img {
    max-inline-size: 100%;
    block-size: auto;
    display: block;
  }

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

  button {
    font: inherit;
    background: transparent;
    border: none;
    cursor: pointer;
  }
}

@layer base {
  :root {
    /* Design Tokens (Theme Colors) */
    --color-slate-950: hsl(224, 71%, 4%);
    --color-slate-900: hsl(224, 71%, 7%);
    --color-slate-800: hsl(224, 71%, 12%);
    --color-slate-700: hsl(224, 30%, 20%);
    --color-slate-400: hsl(215, 20%, 65%);
    --color-slate-100: hsl(210, 40%, 96%);
    --color-white: hsl(0, 0%, 100%);

    --color-indigo-500: hsl(250, 84%, 67%);
    --color-teal-400: hsl(180, 85%, 45%);
    
    /* Semantic variables */
    --bg-primary: var(--color-slate-950);
    --bg-secondary: var(--color-slate-900);
    --bg-tertiary: var(--color-slate-800);
    --text-primary: var(--color-slate-100);
    --text-secondary: var(--color-slate-400);
    
    --accent-primary: var(--color-indigo-500);
    --accent-secondary: var(--color-teal-400);
    --accent-gradient: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    
    --border-color: rgba(255, 255, 255, 0.08);
    --glass-bg: rgba(15, 23, 42, 0.55);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    
    /* Typography */
    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    
    /* Spacing & Utilities */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 36px;
    
    --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  }

  body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-body);
    overflow-x: hidden;
    position: relative;
  }
  
  /* Decorative background glows */
  body::before, body::after {
    content: '';
    position: absolute;
    width: 40vw;
    height: 40vw;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.15;
    z-index: -1;
    pointer-events: none;
  }
  
  body::before {
    top: 5%;
    left: -10%;
    background: var(--accent-primary);
  }
  
  body::after {
    top: 40%;
    right: -10%;
    background: var(--accent-secondary);
  }

  h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-white);
  }
}

@layer theme {
  /* Typography helper classes */
  .gradient-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
  }
  
  /* Focus States */
  a:focus-visible, button:focus-visible {
    outline: 2px solid var(--accent-secondary);
    outline-offset: 4px;
  }
}

@layer components {
  /* --- Header --- */
  .header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(9, 13, 22, 0.7);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
  }
  
  .header-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.25rem 2rem;
  }
  
  .logo-group {
    display: flex;
    align-items: center;
    gap: 0.75rem;
  }
  
  .logo-img {
    width: 40px;
    height: 40px;
    border-radius: 22%; /* iOS App Icon style squircle */
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  }
  
  .logo-title {
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    font-family: var(--font-heading);
  }
  
  .nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
  }
  
  .nav-link:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.04);
  }

  /* --- Main Container --- */
  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
  }

  /* --- Hero Section --- */
  .hero-section {
    padding-block-start: 11rem;
    padding-block-end: 7rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 2rem;
  }

  .hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    max-width: 800px;
  }

  .hero-logo {
    width: 96px;
    height: 96px;
    border-radius: 22%;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    margin-block-end: 0.5rem;
    animation: floatLogo 6s infinite ease-in-out;
  }

  .app-badge-promo {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.2);
    color: var(--accent-primary);
    padding: 0.4rem 1rem;
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
  }

  .pulse-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: #10b981;
    box-shadow: 0 0 8px #10b981;
    display: inline-block;
    animation: pulseGlow 2s infinite ease-in-out;
  }

  @keyframes pulseGlow {
    0%, 100% {
      opacity: 1;
      transform: scale(1);
    }
    50% {
      opacity: 0.4;
      transform: scale(0.85);
    }
  }

  .hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.1;
  }

  .hero-description {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 600px;
    line-height: 1.6;
  }

  /* --- Android Funnel Card --- */
  .android-funnel-card {
    width: 100%;
    max-width: 680px;
    margin-block-start: 1rem;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--glass-shadow), 0 0 40px rgba(99, 102, 241, 0.08);
    padding: 1.75rem 2rem;
    text-align: left;
    position: relative;
    overflow: hidden;
  }

  .android-funnel-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 10%;
    right: 10%;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.6), rgba(45, 212, 191, 0.6), transparent);
  }

  .funnel-header {
    margin-block-end: 1.5rem;
  }

  .funnel-title-group {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin-block-end: 0.4rem;
  }

  .android-icon {
    color: #34d399;
    flex-shrink: 0;
  }

  .funnel-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-white);
  }

  .funnel-instruction {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.5;
  }

  .funnel-steps {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.25rem;
    background: rgba(2, 6, 23, 0.55);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-md);
    padding: 1.25rem;
  }

  .funnel-step {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
    min-width: 0;
  }

  .step-meta {
    display: flex;
    align-items: center;
    gap: 0.65rem;
  }

  .step-badge {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 700;
    flex-shrink: 0;
    box-shadow: 0 2px 6px rgba(99, 102, 241, 0.4);
  }

  .step-text {
    display: flex;
    flex-direction: column;
    min-width: 0;
  }

  .step-name {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-white);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .step-subtext {
    font-size: 0.75rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .btn-group-join {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    height: 50px;
    padding-inline: 1.15rem;
    background: linear-gradient(135deg, #4f46e5 0%, #06b6d4 100%);
    color: var(--color-white);
    font-size: 0.92rem;
    font-weight: 600;
    border-radius: 7px;
    box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), filter var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
  }

  .btn-group-join:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(79, 70, 229, 0.55);
    filter: brightness(1.08);
  }

  .step-connector {
    color: var(--text-secondary);
    opacity: 0.45;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .play-store-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 50px;
    transition: transform var(--transition-fast), filter var(--transition-fast);
  }

  .play-store-btn:hover {
    transform: translateY(-2px);
    filter: brightness(1.1);
  }

  .play-store-badge {
    height: 50px;
    width: auto;
  }

  .funnel-footer {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    margin-block-start: 1rem;
    font-size: 0.82rem;
    color: var(--text-secondary);
  }

  .email-fallback-link {
    color: var(--accent-secondary);
    text-decoration: underline;
    text-underline-offset: 3px;
    transition: color var(--transition-fast);
  }

  .email-fallback-link:hover {
    color: var(--color-white);
  }

  /* --- iOS Secondary Strip --- */
  .ios-secondary-strip {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    margin-block-start: 0.5rem;
    padding: 0.5rem 1.15rem;
    background: rgba(15, 23, 42, 0.45);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 100px;
    font-size: 0.85rem;
    transition: border-color var(--transition-fast), background var(--transition-fast);
  }

  .ios-secondary-strip:hover {
    border-color: rgba(255, 255, 255, 0.18);
    background: rgba(15, 23, 42, 0.7);
  }

  .ios-strip-label {
    color: var(--text-secondary);
  }

  .ios-strip-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--color-white);
    font-weight: 500;
    transition: color var(--transition-fast), transform var(--transition-fast);
  }

  .ios-strip-btn:hover {
    color: var(--accent-secondary);
    transform: translateX(2px);
  }

  .apple-icon {
    color: var(--color-white);
    flex-shrink: 0;
  }

  /* --- Mockup placeholder --- */

  /* --- Features Section --- */
  .features-section {
    padding-block-start: 4rem;
    padding-block-end: 8rem;
  }

  .section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 4rem auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
  }

  .section-tag {
    font-size: 0.85rem;
    color: var(--accent-secondary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
  }

  .section-title {
    font-size: clamp(2rem, 3.5vw, 2.5rem);
    font-weight: 800;
    letter-spacing: -0.02em;
  }

  .features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
  }

  .feature-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: var(--radius-lg);
    padding: 2.5rem 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    transition: transform var(--transition-smooth), border-color var(--transition-smooth), box-shadow var(--transition-smooth);
    box-shadow: var(--glass-shadow);
  }

  .feature-card:hover {
    transform: translateY(-6px);
    border-color: rgba(255, 255, 255, 0.15);
    box-shadow: 0 12px 40px 0 rgba(0, 0, 0, 0.5), 0 0 20px 0 rgba(99, 102, 241, 0.05);
  }

  .feature-icon-wrapper {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.04);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-secondary);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: color var(--transition-smooth), background var(--transition-smooth);
  }

  .feature-card:hover .feature-icon-wrapper {
    background: var(--accent-gradient);
    color: var(--color-white);
    border-color: transparent;
  }

  .feature-card-title {
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.01em;
  }

  .feature-card-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
  }

  /* --- Footer --- */
  .footer {
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
    padding-block: 4rem;
    margin-block-start: auto;
  }

  .footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
  }

  .footer-left {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
  }

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

  .footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-family: var(--font-heading);
    font-size: 1.1rem;
  }

  .footer-logo-img {
    width: 24px;
    height: 24px;
    border-radius: 22%;
  }

  .footer-right {
    display: flex;
    gap: 2rem;
  }

  .footer-link {
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
  }

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

@layer utilities {
  /* Dynamic utilities */
}

/* --- Animations --- */
@keyframes floatLogo {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-8px);
  }
}

/* --- Responsive styles --- */
@media (max-width: 868px) {
  .hero-section {
    padding-block-start: 8rem;
    padding-block-end: 4rem;
  }

  .features-grid {
    grid-template-columns: 1fr;
    max-width: 500px;
    margin: 0 auto;
  }
  
  .footer-content {
    flex-direction: column;
    gap: 2rem;
    text-align: center;
  }
  
  .footer-left {
    align-items: center;
  }
}

@media (max-width: 640px) {
  .android-funnel-card {
    padding: 1.5rem 1.25rem;
  }

  .funnel-steps {
    flex-direction: column;
    align-items: stretch;
    gap: 1rem;
    padding: 1rem;
  }

  .step-connector {
    transform: rotate(90deg);
    margin: -0.25rem auto;
  }

  .btn-group-join, .play-store-btn {
    width: 100%;
    min-height: 48px;
  }

  .play-store-badge {
    height: 48px;
    max-width: 100%;
    object-fit: contain;
  }

  .funnel-footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
  }

  .ios-secondary-strip {
    flex-direction: column;
    gap: 0.35rem;
    border-radius: var(--radius-md);
    padding: 0.75rem 1rem;
    text-align: center;
  }
}

/* --- Screen-reader / Accessibility --- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* --- Forced Colors Mode / High Contrast Fallback --- */
@media (forced-colors: active) {
  .feature-card, .android-funnel-card, .btn-group-join, .ios-secondary-strip {
    border: 1px solid CanvasText !important;
  }
  .logo-title, .gradient-text {
    background: none !important;
    -webkit-text-fill-color: CanvasText !important;
    color: CanvasText !important;
  }
  .feature-icon-wrapper {
    background: Canvas !important;
    border: 1px solid CanvasText !important;
  }
}

/* --- Privacy Policy Page --- */
.privacy-section {
  padding-block-start: 10rem;
  padding-block-end: 6rem;
  max-width: 800px;
  margin: 0 auto;
}

.privacy-content {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--radius-lg);
  padding: 3rem 2.5rem;
  box-shadow: var(--glass-shadow);
}

.privacy-content h1 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  margin-block-end: 1.5rem;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
}

.privacy-content h2 {
  font-size: 1.5rem;
  margin-block-start: 2.5rem;
  margin-block-end: 1rem;
  border-bottom: 1px solid var(--border-color);
  padding-block-end: 0.5rem;
}

.privacy-content h3 {
  font-size: 1.2rem;
  margin-block-start: 1.75rem;
  margin-block-end: 0.75rem;
  color: var(--color-white);
}

.privacy-content p {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-block-end: 1.25rem;
  line-height: 1.7;
}

.privacy-content ul {
  margin-block-end: 1.5rem;
  padding-inline-start: 1.5rem;
  list-style-type: square;
  color: var(--text-secondary);
}

.privacy-content li {
  margin-block-end: 0.5rem;
  line-height: 1.6;
}

.privacy-content li strong {
  color: var(--color-white);
}

.privacy-content a {
  color: var(--accent-secondary);
  text-decoration: underline;
  transition: color var(--transition-fast);
}

.privacy-content a:hover {
  color: var(--text-primary);
}

@media (max-width: 640px) {
  .privacy-content {
    padding: 2rem 1.5rem;
  }
}