/* ==========================================================================
   Networking Room — Landing Page Stylesheet
   ========================================================================== */

/* --- Tokens: Light theme --- */
:root {
  --c-bg:              #FFFFFF;
  --c-bg-elevated:     #F5F7FA;
  --c-bg-tertiary:     #EBEDF0;
  --c-bg-nav:          rgba(255,255,255,0.92);

  --c-text:            #1D1D1F;
  --c-text-secondary:  #6E6E73;
  --c-text-muted:      #98989D;

  --c-accent:          #6366f1;
  --c-accent-hover:    #818cf8;
  --c-accent-subtle:   rgba(99,102,241,0.08);

  --c-border:          #E5E5EA;
  --c-border-hover:    #D1D1D6;

  --c-card-bg:         #FFFFFF;
  --c-card-border:     #E5E5EA;

  --c-shadow-sm:       0 1px 3px rgba(0,0,0,0.06);
  --c-shadow-md:       0 4px 12px rgba(0,0,0,0.08);
  --c-shadow-lg:       0 8px 30px rgba(0,0,0,0.12);

  --font-body:    "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-heading: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --c-max-width:    1200px;
  --c-nav-height:   64px;
  --c-radius-sm:    8px;
  --c-radius-md:    12px;
  --c-radius-lg:    16px;
  --c-radius-xl:    24px;
  --c-transition:   250ms ease;
  --c-transition-fast: 150ms ease;
}

/* --- Dark theme --- */
@media (prefers-color-scheme: dark) {
  :root:not(.theme-light) {
    --c-bg:              #0F0F0F;
    --c-bg-elevated:     #1A1A1A;
    --c-bg-tertiary:     #252525;
    --c-bg-nav:          rgba(15,15,15,0.92);
    --c-text:            #F5F5F7;
    --c-text-secondary:  #98989D;
    --c-text-muted:      #6E6E73;
    --c-accent:          #818cf8;
    --c-accent-hover:    #a5b4fc;
    --c-accent-subtle:   rgba(129,140,248,0.12);
    --c-border:          #2C2C2E;
    --c-border-hover:    #3A3A3C;
    --c-card-bg:         #1A1A1A;
    --c-card-border:     #2C2C2E;
    --c-shadow-sm:       0 1px 3px rgba(0,0,0,0.4);
    --c-shadow-md:       0 4px 12px rgba(0,0,0,0.5);
    --c-shadow-lg:       0 8px 30px rgba(0,0,0,0.6);
  }
}
:root.theme-dark {
  --c-bg:              #0F0F0F;
  --c-bg-elevated:     #1A1A1A;
  --c-bg-tertiary:     #252525;
  --c-bg-nav:          rgba(15,15,15,0.92);
  --c-text:            #F5F5F7;
  --c-text-secondary:  #98989D;
  --c-text-muted:      #6E6E73;
  --c-accent:          #818cf8;
  --c-accent-hover:    #a5b4fc;
  --c-accent-subtle:   rgba(129,140,248,0.12);
  --c-border:          #2C2C2E;
  --c-border-hover:    #3A3A3C;
  --c-card-bg:         #1A1A1A;
  --c-card-border:     #2C2C2E;
  --c-shadow-sm:       0 1px 3px rgba(0,0,0,0.4);
  --c-shadow-md:       0 4px 12px rgba(0,0,0,0.5);
  --c-shadow-lg:       0 8px 30px rgba(0,0,0,0.6);
}
:root.theme-light {
  --c-bg:              #FFFFFF;
  --c-bg-elevated:     #F5F7FA;
  --c-bg-nav:          rgba(255,255,255,0.92);
  --c-text:            #1D1D1F;
  --c-text-secondary:  #6E6E73;
  --c-accent:          #6366f1;
  --c-accent-hover:    #818cf8;
  --c-accent-subtle:   rgba(99,102,241,0.08);
  --c-border:          #E5E5EA;
  --c-card-bg:         #FFFFFF;
  --c-card-border:     #E5E5EA;
  --c-shadow-sm:       0 1px 3px rgba(0,0,0,0.06);
  --c-shadow-md:       0 4px 12px rgba(0,0,0,0.08);
  --c-shadow-lg:       0 8px 30px rgba(0,0,0,0.12);
}

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--c-text);
  background-color: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  transition: background-color var(--c-transition), color var(--c-transition);
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--c-accent); text-decoration: none; transition: color var(--c-transition-fast); }
a:hover { color: var(--c-accent-hover); }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: 2px;
  border-radius: 2px;
}

/* --- Skip link --- */
.skip-link {
  position: absolute; top: -100%; left: 1rem;
  background: var(--c-accent); color: #fff;
  padding: 0.5rem 1rem; border-radius: var(--c-radius-sm);
  z-index: 1000; font-size: 0.875rem; font-weight: 600;
}
.skip-link:focus { top: 0.5rem; color: #fff; }

/* --- Container --- */
.container { max-width: var(--c-max-width); margin: 0 auto; padding: 0 1.5rem; }

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  line-height: 1.2;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--c-text);
}
h1 { font-size: clamp(2.5rem, 5vw, 4rem); font-weight: 700; letter-spacing: -0.03em; }
h2 { font-size: clamp(1.75rem, 3vw, 2.5rem); }
h3 { font-size: clamp(1.125rem, 2vw, 1.375rem); }
p { margin-bottom: 1rem; }
strong { font-weight: 600; }

/* --- Navigation --- */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: var(--c-bg-nav);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--c-border);
  height: var(--c-nav-height);
  transition: background var(--c-transition), border-color var(--c-transition);
}
.nav-scrolled { box-shadow: var(--c-shadow-sm); }
.nav-inner {
  display: flex; align-items: center;
  justify-content: space-between;
  height: var(--c-nav-height);
}
.nav-brand {
  display: flex; align-items: center; gap: 0.75rem;
  font-weight: 700; font-size: 1.125rem; color: var(--c-text);
}
.nav-brand:hover { color: var(--c-text); }
.nav-brand img { width: 32px; height: 32px; border-radius: 22.37%; }
.nav-links { display: flex; align-items: center; gap: 1.75rem; list-style: none; }
.nav-links a { color: var(--c-text-secondary); font-size: 0.9375rem; font-weight: 500; transition: color var(--c-transition-fast); }
.nav-links a:hover { color: var(--c-text); }
.nav-cta {
  display: inline-flex; align-items: center; gap: 0.5rem;
  background: var(--c-accent); color: #fff !important;
  padding: 0.5rem 1.25rem; border-radius: 100px;
  font-size: 0.875rem; font-weight: 600;
  transition: background var(--c-transition-fast), transform var(--c-transition-fast);
}
.nav-cta:hover { background: var(--c-accent-hover); color: #fff !important; transform: scale(1.03); }
.theme-toggle {
  background: none; border: 1px solid var(--c-border); border-radius: 100px;
  cursor: pointer; padding: 0.375rem; color: var(--c-text);
  display: flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; transition: all var(--c-transition-fast);
}
.theme-toggle:hover { border-color: var(--c-accent); color: var(--c-accent); }
.theme-toggle svg { width: 18px; height: 18px; }
.theme-toggle .icon-sun, .theme-toggle .icon-moon { display: none; }
.theme-toggle .icon-moon { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not(.theme-light) .theme-toggle .icon-moon { display: none; }
  :root:not(.theme-light) .theme-toggle .icon-sun { display: block; }
}
:root.theme-dark .theme-toggle .icon-moon { display: none; }
:root.theme-dark .theme-toggle .icon-sun { display: block; }
:root.theme-light .theme-toggle .icon-moon { display: block; }
:root.theme-light .theme-toggle .icon-sun { display: none; }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 0.5rem; color: var(--c-text); }
.nav-toggle svg { width: 24px; height: 24px; }
@media (max-width: 768px) {
  .nav-toggle { display: block; }
  .nav-links {
    display: none; position: absolute;
    top: var(--c-nav-height); left: 0; right: 0;
    background: var(--c-bg); border-bottom: 1px solid var(--c-border);
    flex-direction: column; padding: 1.5rem; gap: 1rem;
  }
  .nav-links.open { display: flex; }
}

/* --- Hero --- */
.hero { padding: 6rem 0 4rem; text-align: center; overflow: hidden; }
.hero-icon {
  width: 128px; height: 128px; border-radius: 22.37%;
  margin: 0 auto 2rem; box-shadow: var(--c-shadow-lg);
}
.hero h1 {
  margin-bottom: 1rem;
  background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #ec4899 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.hero-tagline {
  font-size: 0.9375rem; font-weight: 600; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--c-accent);
  margin-bottom: 1rem; display: block;
}
.hero-subtitle {
  font-size: clamp(1.0625rem, 2vw, 1.25rem);
  color: var(--c-text-secondary); max-width: 580px;
  margin: 0 auto 2.5rem;
}
.hero-actions { display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap; align-items: center; }
.btn-primary {
  display: inline-flex; align-items: center; gap: 0.5rem;
  background: var(--c-accent); color: #fff;
  padding: 0.875rem 2rem; border-radius: 100px;
  font-size: 1rem; font-weight: 600;
  transition: background var(--c-transition-fast), transform var(--c-transition-fast), box-shadow var(--c-transition-fast);
  box-shadow: 0 4px 14px rgba(99,102,241,0.35);
}
.btn-primary:hover { background: var(--c-accent-hover); color: #fff; transform: translateY(-2px); box-shadow: 0 6px 20px rgba(99,102,241,0.45); }
.btn-secondary {
  display: inline-flex; align-items: center; gap: 0.5rem;
  background: transparent; color: var(--c-text-secondary);
  padding: 0.875rem 2rem; border: 1px solid var(--c-border);
  border-radius: 100px; font-size: 1rem; font-weight: 500;
  transition: all var(--c-transition-fast);
}
.btn-secondary:hover { border-color: var(--c-accent); color: var(--c-accent); }

/* --- Trust pillars --- */
.pillars-section { padding: 4rem 0; border-top: 1px solid var(--c-border); border-bottom: 1px solid var(--c-border); }
.pillars-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; text-align: center; }
.pillar { padding: 1.5rem; }
.pillar-icon {
  width: 48px; height: 48px; margin: 0 auto 1rem;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--c-radius-md);
  background: var(--c-accent-subtle); color: var(--c-accent);
}
.pillar-icon svg { width: 24px; height: 24px; }
.pillar h3 { margin-bottom: 0.5rem; font-size: 1.125rem; }
.pillar p { color: var(--c-text-secondary); font-size: 0.9375rem; margin: 0; }
@media (max-width: 640px) { .pillars-grid { grid-template-columns: 1fr; gap: 1.5rem; } }

/* --- Generic sections --- */
.section { padding: 5rem 0; }
.section-alt { background: var(--c-bg-elevated); }
.section-header { text-align: center; margin-bottom: 3rem; }
.section-header h2 { margin-bottom: 0.75rem; }
.section-header p { color: var(--c-text-secondary); max-width: 600px; margin: 0 auto; }

/* --- How it works steps --- */
.steps { display: flex; flex-direction: column; gap: 2rem; max-width: 720px; margin: 0 auto; }
.step { display: flex; gap: 1.5rem; align-items: flex-start; }
.step-number {
  flex-shrink: 0; width: 40px; height: 40px;
  background: var(--c-accent); color: #fff; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem; font-weight: 700; margin-top: 2px;
}
.step h3 { font-size: 1.125rem; margin-bottom: 0.25rem; }
.step p { color: var(--c-text-secondary); font-size: 0.9375rem; margin: 0; }

/* --- Feature cards --- */
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.5rem; }
.feature-card {
  background: var(--c-card-bg); border: 1px solid var(--c-card-border);
  border-radius: var(--c-radius-lg); padding: 2rem;
  transition: transform var(--c-transition-fast), box-shadow var(--c-transition);
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--c-shadow-md); }
.feature-icon {
  width: 48px; height: 48px; background: var(--c-accent-subtle);
  border-radius: var(--c-radius-md); display: flex; align-items: center;
  justify-content: center; margin-bottom: 1rem; color: var(--c-accent);
}
.feature-icon svg { width: 24px; height: 24px; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.feature-card h3 { margin-bottom: 0.5rem; }
.feature-card p { color: var(--c-text-secondary); font-size: 0.9375rem; margin: 0; }

/* --- Feature list (host panel) --- */
.feature-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.25rem; }
.feature-list-item { display: flex; align-items: flex-start; gap: 1rem; padding: 1.25rem; background: var(--c-card-bg); border: 1px solid var(--c-card-border); border-radius: var(--c-radius-lg); }
.feature-list-item .feature-icon { flex-shrink: 0; margin: 0; }
.feature-list-item h3 { font-size: 1rem; margin-bottom: 0.25rem; }
.feature-list-item p { color: var(--c-text-secondary); font-size: 0.875rem; margin: 0; }
@media (max-width: 640px) { .feature-list { grid-template-columns: 1fr; } }

/* --- Projector spotlight --- */
.projector-section { background: var(--c-bg-elevated); border-top: 1px solid var(--c-border); border-bottom: 1px solid var(--c-border); }
.projector-content { max-width: 800px; margin: 0 auto; text-align: center; }
.projector-content h2 { margin-bottom: 1rem; }
.projector-content > p { color: var(--c-text-secondary); max-width: 600px; margin: 0 auto 3rem; }
.projector-scenarios { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; text-align: left; }
.projector-scenario { padding: 1.5rem; background: var(--c-card-bg); border: 1px solid var(--c-card-border); border-radius: var(--c-radius-lg); }
.projector-scenario h3 { font-size: 1rem; margin-bottom: 0.5rem; }
.projector-scenario p { color: var(--c-text-secondary); font-size: 0.875rem; margin: 0; }
@media (max-width: 768px) { .projector-scenarios { grid-template-columns: 1fr; } }

/* --- Leaderboard scenarios --- */
.leaderboard-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
.leaderboard-card { background: var(--c-card-bg); border: 1px solid var(--c-card-border); border-radius: var(--c-radius-lg); padding: 2rem; }
.leaderboard-card .card-eyebrow { font-size: 0.75rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--c-accent); margin-bottom: 0.5rem; display: block; }
.leaderboard-card h3 { font-size: 1.0625rem; margin-bottom: 0.5rem; }
.leaderboard-card p { color: var(--c-text-secondary); font-size: 0.9375rem; margin: 0; }
@media (max-width: 640px) { .leaderboard-grid { grid-template-columns: 1fr; } }

/* --- Use cases --- */
.usecases-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
.usecase-card { background: var(--c-card-bg); border: 1px solid var(--c-card-border); border-radius: var(--c-radius-lg); padding: 2rem; }
.usecase-card h3 { font-size: 1.0625rem; margin-bottom: 0.5rem; }
.usecase-card p { color: var(--c-text-secondary); font-size: 0.9375rem; margin: 0; }
@media (max-width: 640px) { .usecases-grid { grid-template-columns: 1fr; } }

/* --- Pricing --- */
.pricing-card {
  max-width: 420px; margin: 0 auto;
  background: var(--c-card-bg); border: 2px solid var(--c-accent);
  border-radius: var(--c-radius-xl); padding: 2.5rem; text-align: center;
  box-shadow: 0 0 0 4px var(--c-accent-subtle);
}
.pricing-card h3 { font-size: 1.5rem; margin-bottom: 0.5rem; }
.pricing-price { font-size: 3rem; font-weight: 800; color: var(--c-accent); letter-spacing: -0.03em; line-height: 1; margin: 0.75rem 0 0.25rem; }
.pricing-period { color: var(--c-text-muted); font-size: 0.9375rem; margin-bottom: 2rem; }
.pricing-features { list-style: none; text-align: left; margin-bottom: 2rem; display: flex; flex-direction: column; gap: 0.75rem; }
.pricing-features li { display: flex; align-items: center; gap: 0.75rem; font-size: 0.9375rem; }
.pricing-features li::before { content: ""; width: 20px; height: 20px; background: var(--c-accent-subtle); border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236366f1' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: center; }
.pricing-cta { display: block; background: var(--c-accent); color: #fff; padding: 1rem 2rem; border-radius: 100px; font-weight: 600; font-size: 1rem; text-align: center; transition: background var(--c-transition-fast), transform var(--c-transition-fast); }
.pricing-cta:hover { background: var(--c-accent-hover); color: #fff; transform: translateY(-2px); }

/* --- CTA banner --- */
.cta-banner { padding: 6rem 0; text-align: center; }
.cta-banner h2 { margin-bottom: 0.75rem; }
.cta-banner p { color: var(--c-text-secondary); max-width: 500px; margin: 0 auto 2rem; font-size: 1.0625rem; }

/* --- Footer --- */
.footer { border-top: 1px solid var(--c-border); padding: 4rem 0 2rem; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 3rem; margin-bottom: 3rem; }
.footer-brand { display: flex; align-items: center; gap: 0.75rem; font-weight: 700; font-size: 1.125rem; color: var(--c-text); margin-bottom: 0.75rem; }
.footer-brand img { width: 32px; height: 32px; border-radius: 22.37%; }
.footer-tagline { color: var(--c-text-secondary); font-size: 0.9375rem; margin: 0; }
.footer h4 { font-size: 0.875rem; font-weight: 600; letter-spacing: 0.05em; text-transform: uppercase; color: var(--c-text-muted); margin-bottom: 1rem; }
.footer-links { list-style: none; display: flex; flex-direction: column; gap: 0.5rem; }
.footer-links a { color: var(--c-text-secondary); font-size: 0.9375rem; transition: color var(--c-transition-fast); }
.footer-links a:hover { color: var(--c-text); }
.footer-bottom { padding-top: 2rem; border-top: 1px solid var(--c-border); display: flex; justify-content: space-between; align-items: center; color: var(--c-text-muted); font-size: 0.875rem; flex-wrap: wrap; gap: 0.5rem; }
@media (max-width: 768px) { .footer-grid { grid-template-columns: 1fr; gap: 2rem; } .footer-bottom { flex-direction: column; text-align: center; } }

/* --- Fade-in animations --- */
.fade-in { opacity: 0; transform: translateY(16px); transition: opacity 0.5s ease, transform 0.5s ease; }
.fade-in.visible { opacity: 1; transform: none; }
.feature-card, .feature-list-item, .leaderboard-card, .usecase-card, .projector-scenario, .pillar, .step {
  opacity: 0; transform: translateY(16px);
  transition: opacity 0.45s ease, transform 0.45s ease;
}
.feature-card.visible, .feature-list-item.visible, .leaderboard-card.visible, .usecase-card.visible, .projector-scenario.visible, .pillar.visible, .step.visible {
  opacity: 1; transform: none;
}

/* --- Support / Legal pages --- */
.legal { max-width: 720px; margin: 0 auto; padding: 4rem 0 6rem; }
.legal h1 { margin-bottom: 0.5rem; }
.legal .meta { color: var(--c-text-secondary); font-size: 1rem; margin-bottom: 2.5rem; }
.faq-list { display: flex; flex-direction: column; gap: 0.75rem; margin-bottom: 3rem; }
.faq-item {
  background: var(--c-card-bg); border: 1px solid var(--c-card-border);
  border-radius: var(--c-radius-md); overflow: hidden;
  transition: border-color var(--c-transition-fast);
}
.faq-item:hover { border-color: var(--c-border-hover); }
.faq-item[open] { border-color: var(--c-accent); }
.faq-item summary {
  padding: 1.125rem 1.5rem;
  font-weight: 600; font-size: 0.9375rem;
  cursor: pointer; list-style: none;
  display: flex; justify-content: space-between; align-items: center;
  gap: 1rem; color: var(--c-text);
  transition: color var(--c-transition-fast);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "";
  flex-shrink: 0; width: 20px; height: 20px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%236366f1' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: center;
  transition: transform var(--c-transition-fast);
}
.faq-item[open] summary::after { transform: rotate(180deg); }
.faq-item .answer { padding: 0 1.5rem 1.25rem; }
.faq-item .answer p { color: var(--c-text-secondary); font-size: 0.9375rem; margin: 0; }
.faq-item .answer p + p { margin-top: 0.75rem; }
.faq-item .answer a { color: var(--c-accent); }
.faq-item .answer a:hover { color: var(--c-accent-hover); }
.contact-card {
  background: var(--c-bg-elevated); border: 1px solid var(--c-border);
  border-radius: var(--c-radius-lg); padding: 2rem; text-align: center;
}
.contact-card h3 { margin-bottom: 0.5rem; font-size: 1.25rem; }
.contact-card p { color: var(--c-text-secondary); font-size: 0.9375rem; margin-bottom: 0.75rem; }
.contact-card a { font-weight: 600; color: var(--c-accent); font-size: 1rem; }
.contact-card a:hover { color: var(--c-accent-hover); }
.quiz-note { text-align: center; color: var(--c-text-muted); font-size: 0.9375rem; margin-top: 2rem; }