/* ═══════════════════════════════════════════════════════════════
   CoolInvite — Global Design System & Styles
   ═══════════════════════════════════════════════════════════════ */
@import url('https://fonts.googleapis.com/css2?family=Syne:wght@700;800&family=Plus+Jakarta+Sans:wght@400;500;600;700&family=DM+Mono:ital,wght@0,400;0,500&display=swap');

/* ── CSS Custom Properties ── */
:root {
  /* Core Brand */
  --color-primary:        #38BDF8;
  --color-primary-vivid:  #0EA5E9;
  --color-primary-glow:   #7DD3FC;
  --color-accent:         #F472B6;
  --color-accent-warm:    #FB923C;

  /* Surfaces */
  --color-bg:             #F8FBFF;
  --color-surface-1:      #FFFFFF;
  --color-surface-2:      #EFF8FF;
  --color-surface-glass:  rgba(255, 255, 255, 0.55);
  --color-border:         rgba(56, 189, 248, 0.18);
  --color-border-strong:  rgba(56, 189, 248, 0.40);

  /* Text */
  --color-text:           #0C1B33;
  --color-text-secondary: #4A6080;
  --color-text-muted:     #8FA3BB;

  /* Gradients */
  --gradient-aurora:      linear-gradient(135deg, #EFF8FF 0%, #DBEAFE 30%, #FCE7F3 70%, #EFF8FF 100%);
  --gradient-mesh:        radial-gradient(ellipse at 20% 50%, rgba(56,189,248,0.15) 0%, transparent 60%),
                          radial-gradient(ellipse at 80% 20%, rgba(244,114,182,0.12) 0%, transparent 60%),
                          radial-gradient(ellipse at 50% 90%, rgba(167,139,250,0.10) 0%, transparent 60%);
  --gradient-cta:         linear-gradient(135deg, #38BDF8 0%, #0EA5E9 50%, #7C3AED 100%);
  --gradient-cta-hover:   linear-gradient(135deg, #0EA5E9 0%, #7C3AED 100%);
  --gradient-card-border: linear-gradient(135deg, rgba(56,189,248,0.5), rgba(244,114,182,0.3));
  --gradient-shine:       linear-gradient(105deg, transparent 40%, rgba(255,255,255,0.7) 50%, transparent 60%);

  /* Semantic */
  --color-success: #22C55E;
  --color-warning: #F59E0B;
  --color-error:   #EF4444;

  /* Spacing & Shape */
  --radius-xs:   8px;
  --radius-sm:   12px;
  --radius-md:   18px;
  --radius-lg:   24px;
  --radius-xl:   32px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm:   0 2px 8px rgba(14, 165, 233, 0.08);
  --shadow-md:   0 8px 24px rgba(14, 165, 233, 0.12), 0 2px 8px rgba(0,0,0,0.04);
  --shadow-lg:   0 20px 60px rgba(14, 165, 233, 0.16), 0 4px 16px rgba(0,0,0,0.06);
  --shadow-glow: 0 0 40px rgba(56, 189, 248, 0.35);
  --shadow-card: 0 1px 0 rgba(255,255,255,0.9) inset, 0 8px 32px rgba(14,165,233,0.10);

  /* Timing */
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-out:    cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);

  /* Typography */
  --font-display: 'Syne', 'Segoe UI', system-ui, sans-serif;
  --font-body:    'Plus Jakarta Sans', 'Segoe UI', system-ui, sans-serif;
  --font-mono:    'DM Mono', 'Consolas', monospace;

  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.375rem;
  --text-2xl:  1.75rem;
  --text-3xl:  2.25rem;
  --text-4xl:  3rem;
  --text-5xl:  3.75rem;
}

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

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

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea, select { font-family: inherit; }
ul, ol { list-style: none; }

/* ── Selection ── */
::selection { background: rgba(56,189,248,0.25); color: var(--color-text); }

/* ── Custom Scrollbar ── */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--gradient-cta); border-radius: 4px; }

/* ── Focus Rings ── */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
  box-shadow: 0 0 0 4px rgba(56,189,248,0.20);
}

/* ── Aurora Background ── */
.aurora-bg {
  position: fixed;
  inset: 0;
  background: var(--gradient-aurora);
  background-size: 400% 400%;
  animation: auroraShift 12s ease-in-out infinite;
  z-index: -1;
}
.aurora-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-mesh);
  pointer-events: none;
}

/* ── Glassmorphism Card ── */
.glass-card {
  background: rgba(255, 255, 255, 0.55);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-top: 1px solid rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow-card);
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
}
.glass-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  opacity: 0.03;
  pointer-events: none;
  z-index: 0;
}
.glass-card > * { position: relative; z-index: 1; }

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-full);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 600;
  cursor: pointer;
  border: none;
  position: relative;
  overflow: hidden;
  transition: transform 0.15s var(--ease-spring), box-shadow 0.2s var(--ease-out);
  white-space: nowrap;
}
.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-shine);
  transform: translateX(-100%);
  transition: transform 0.5s var(--ease-out);
}
.btn:hover::after { transform: translateX(100%); }
.btn:hover { transform: scale(1.02); }
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--gradient-cta);
  color: #fff;
  box-shadow: 0 4px 15px rgba(56,189,248,0.4), 0 2px 6px rgba(0,0,0,0.1);
}
.btn-primary:hover {
  box-shadow: 0 8px 25px rgba(56,189,248,0.5), 0 4px 12px rgba(0,0,0,0.1);
}

.btn-outline {
  background: transparent;
  color: var(--color-text);
  border: 1.5px solid var(--color-border-strong);
}
.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary-vivid);
  background: rgba(56,189,248,0.06);
}

.btn-dark {
  background: #0C1B33;
  color: #fff;
  box-shadow: 0 4px 15px rgba(12,27,51,0.25);
}

.btn-accent {
  background: linear-gradient(135deg, #F472B6, #FB923C);
  color: #fff;
  box-shadow: 0 4px 15px rgba(244,114,182,0.4);
}

.btn-lg { padding: 18px 36px; font-size: var(--text-lg); }
.btn-sm { padding: 10px 20px; font-size: var(--text-sm); }
.btn-full { width: 100%; }

/* ── Navigation ── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(248, 251, 255, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  transition: all 0.3s var(--ease-out);
}
.nav.scrolled {
  padding: 12px 24px;
  box-shadow: var(--shadow-sm);
}
.nav-logo {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
  background: var(--gradient-cta);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
}
.nav-actions { display: flex; gap: 12px; align-items: center; }

/* ── Toast Notifications ── */
#toast-container {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
  min-width: 300px;
  max-width: 480px;
}
.toast {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 20px;
  border-radius: var(--radius-md);
  background: var(--color-surface-1);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
  font-size: var(--text-sm);
  font-weight: 500;
  pointer-events: all;
  animation: toastIn 0.4s var(--ease-spring) forwards;
  backdrop-filter: blur(20px);
}
.toast.out { animation: toastOut 0.3s var(--ease-in-out) forwards; }
.toast-success { border-left: 3px solid var(--color-success); }
.toast-error   { border-left: 3px solid var(--color-error); }
.toast-info    { border-left: 3px solid var(--color-primary); }
.toast-icon    { font-size: 1.1rem; }
.toast-msg     { flex: 1; color: var(--color-text); }

/* ── Pill Badge ── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 400;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.badge-primary {
  background: rgba(56,189,248,0.12);
  color: var(--color-primary-vivid);
  box-shadow: 0 0 12px rgba(56,189,248,0.2);
}
.badge-success {
  background: rgba(34,197,94,0.12);
  color: #16a34a;
}
.badge-muted {
  background: rgba(143,163,187,0.15);
  color: var(--color-text-muted);
}
.badge-accent {
  background: rgba(244,114,182,0.12);
  color: #db2777;
}
.badge-optional {
  background: rgba(143,163,187,0.12);
  color: var(--color-text-muted);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
}

/* ── Skeleton Loading ── */
.skeleton {
  background: linear-gradient(90deg, #f0f4f8 25%, #e2eaf2 50%, #f0f4f8 75%);
  background-size: 200% 100%;
  animation: skeletonShimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

/* ── Section Utilities ── */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.section { padding: 80px 0; }

/* Removed floating hearts per request */
.heart-particle {
  position: absolute;
  bottom: -20px;
  font-size: 1.2rem;
  opacity: 0.6;
  animation: floatUp linear infinite;
  pointer-events: none;
}

/* ── Gradient Text ── */
.gradient-text {
  background: var(--gradient-cta);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Page Title ── */
.page-header {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

/* ── Divider ── */
.divider {
  display: flex;
  align-items: center;
  gap: 16px;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  margin: 20px 0;
}
.divider::before, .divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-border);
}

/* ── Switch Toggle (iOS style) ── */
.toggle-switch {
  position: relative;
  display: inline-block;
  width: 52px;
  height: 28px;
  flex-shrink: 0;
}
.toggle-switch input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background: #D1D5DB;
  border-radius: var(--radius-full);
  transition: background 0.3s var(--ease-spring);
}
.toggle-slider::before {
  content: '';
  position: absolute;
  height: 22px;
  width: 22px;
  left: 3px;
  bottom: 3px;
  background: white;
  border-radius: 50%;
  transition: transform 0.3s var(--ease-spring);
  box-shadow: 0 2px 6px rgba(0,0,0,0.15);
}
.toggle-switch input:checked + .toggle-slider { background: var(--color-primary-vivid); }
.toggle-switch input:checked + .toggle-slider::before { transform: translateX(24px); }

/* ── Generic Modal ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(12, 27, 51, 0.5);
  backdrop-filter: blur(4px);
  z-index: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s var(--ease-out);
}
.modal-overlay.open {
  opacity: 1;
  pointer-events: all;
}
.modal-card {
  width: 100%;
  max-width: 460px;
  background: var(--color-surface-1);
  border-radius: var(--radius-xl);
  padding: 36px 32px;
  box-shadow: var(--shadow-lg);
  transform: scale(0.95) translateY(10px);
  transition: transform 0.35s var(--ease-spring);
  max-height: 90vh;
  overflow-y: auto;
}
.modal-overlay.open .modal-card {
  transform: scale(1) translateY(0);
}

/* ── Paywall Modal ── */
.paywall-overlay {
  position: fixed;
  inset: 0;
  background: rgba(12,27,51,0.6);
  backdrop-filter: blur(6px);
  z-index: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}
.paywall-overlay.open { opacity: 1; pointer-events: all; }
.paywall-card {
  width: 100%;
  max-width: 460px;
  background: var(--color-surface-1);
  border-radius: var(--radius-xl);
  padding: 36px 28px;
  box-shadow: var(--shadow-lg);
  transform: translateY(20px) scale(0.96);
  transition: transform 0.4s var(--ease-spring);
}
.paywall-overlay.open .paywall-card { transform: translateY(0) scale(1); }
.paywall-close {
  float: right;
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--color-surface-2);
  border: none;
  cursor: pointer;
  color: var(--color-text-secondary);
  font-size: 1rem;
  display: flex; align-items: center; justify-content: center;
}
.paywall-envelope {
  font-size: 2.5rem;
  display: inline-block;
  animation: floatBob 2.5s ease-in-out infinite;
  float: right;
}
.paywall-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 6px;
  clear: both;
}
.paywall-subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: 24px;
  line-height: 1.5;
}
.paywall-plans { display: flex; flex-direction: column; gap: 12px; margin-bottom: 20px; }
.paywall-plan {
  border-radius: var(--radius-lg);
  padding: 18px 20px;
  position: relative;
  overflow: hidden;
}
.paywall-plan.plan-single {
  border: 2px solid var(--color-accent);
  background: var(--color-surface-1);
}
.paywall-plan.plan-bundle {
  background: #0C1B33;
  color: white;
}
.plan-best-badge {
  position: absolute;
  top: -1px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #F472B6, #7C3AED);
  color: white;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 4px 14px;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  font-family: var(--font-mono);
}
.plan-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}
.plan-icon {
  width: 36px; height: 36px;
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem;
  background: rgba(244,114,182,0.1);
}
.plan-bundle .plan-icon { background: rgba(255,255,255,0.1); }
.plan-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  font-weight: 600;
}
.plan-bundle .plan-badge { color: rgba(255,255,255,0.6); }
.plan-label { font-size: var(--text-sm); color: var(--color-text-secondary); }
.plan-bundle .plan-label { color: rgba(255,255,255,0.7); }
.plan-price {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--color-text);
}
.plan-bundle .plan-price { color: white; }
.paywall-payment-trust {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}
.payment-icons {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  align-items: center;
}
.pay-icon {
  padding: 3px 8px;
  border: 1px solid #E2E8F0;
  border-radius: 4px;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}
.pay-visa  { color: #1A1F71; }
.pay-mc    { color: #EB001B; }
.pay-amex  { color: #2E77BC; }
.pay-apple { color: #000; }
.pay-google{ color: #4285F4; }
.pay-pp    { color: #003087; }

/* ── Responsive ── */
@media (max-width: 768px) {
  .container { padding: 0 16px; }
  .section { padding: 48px 0; }
  :root {
    --text-4xl: 2.25rem;
    --text-5xl: 2.75rem;
  }
  .nav { 
    padding: 12px 16px; 
  }
  .nav-logo { font-size: 1.25rem; }
  .btn-sm { padding: 8px 14px; font-size: 0.8rem; }
}