/* ======================================================
   RESPONSIVE — Desktop-First to Mobile Mastery
   Breakpoints: 1280px / 1024px / 860px / 768px / 640px / 480px / 375px
   ====================================================== */

html, body {
  max-width: 100vw;
  overflow-x: hidden;
}

@media (max-width: 1280px){
  .container { padding-inline: var(--sp-4); }
  .platform-grid { grid-template-columns: repeat(3, 1fr); }
  .hero-mockup { margin-inline: 0; }
}

@media (max-width: 1080px){
  .nav-links { display: none; }
  .hamburger { display: flex !important; }
  .nav-actions { display: flex; align-items: center; gap: 8px; }
  .nav-actions .btn-sm { display: none; }
  .nav-login {
    display: inline-flex !important;
    font-weight: 600;
    font-size: 13.5px;
    padding: 7px 13px;
    border-radius: var(--radius-sm);
    background: var(--surface-2);
    color: var(--ink) !important;
    border: 1px solid var(--border-strong);
    text-decoration: none;
    transition: all var(--dur-fast);
  }
  .nav-login:hover {
    background: var(--border-strong);
    color: var(--brand-primary) !important;
  }

  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .dept-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); row-gap: var(--sp-4); }
  .steps::before { display: none; }
  .stats-band { grid-template-columns: repeat(3, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1.2fr 1fr 1fr; row-gap: var(--sp-4); }
}

@media (max-width: 860px){
  :root { --nav-h: 72px; }
  .section { padding: var(--sp-6) 0; }

  .showcase, .showcase.reverse {
    grid-template-columns: 1fr;
    gap: var(--sp-4);
  }
  .showcase.reverse .showcase-media,
  .showcase .showcase-media { order: 1; }
  .showcase.reverse .showcase-copy,
  .showcase .showcase-copy { order: 2; }

  .dept-grid { grid-template-columns: 1fr; }
  .platform-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-band { grid-template-columns: 1fr; text-align: center; gap: var(--sp-3); padding: var(--sp-4); }

  .hero { padding-top: calc(var(--nav-h) + var(--sp-4)); padding-bottom: var(--sp-6); }
  .hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--sp-2);
    width: 100%;
    margin-bottom: var(--sp-4);
  }
  .hero-stats .stat {
    padding: var(--sp-2);
  }

  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; margin-bottom: var(--sp-2); }
}

@media (max-width: 768px){
  .hero h1 {
    font-size: clamp(1.85rem, 7vw, 2.5rem);
    line-height: 1.15;
    letter-spacing: -0.02em;
  }
  .hero .lede {
    font-size: 1rem;
    line-height: 1.5;
  }
  .hero-top {
    padding-inline: var(--sp-2);
  }
  
  /* Floating cards refinement on tablets */
  .float-card {
    position: static;
    animation: none;
    margin: 8px auto;
    width: fit-content;
    max-width: 90%;
  }
  .float-3 { display: none !important; }

  /* Pricing grids & Cards */
  .pricing-grid {
    grid-template-columns: 1fr;
    gap: var(--sp-4);
  }
  .pricing-card.is-popular {
    transform: none;
  }

  /* Solutions & Tabs */
  .solution-tabs {
    overflow-x: auto;
    flex-wrap: nowrap;
    justify-content: flex-start;
    padding-bottom: 8px;
    -webkit-overflow-scrolling: touch;
  }
  .solution-tab {
    flex-shrink: 0;
    white-space: nowrap;
  }
}

@media (max-width: 640px){
  .container { padding-inline: 16px; }
  
  /* Navigation */
  .nav {
    padding-inline: 12px;
  }
  .brand span {
    font-size: 15px;
  }
  .brand small {
    display: none;
  }

  /* Feature Grid & Cards */
  .feature-grid { grid-template-columns: 1fr; gap: 16px; }
  .feature-card { padding: 20px; }
  .steps { grid-template-columns: 1fr; gap: 16px; }
  .form-row { grid-template-columns: 1fr; gap: 12px; }
  
  /* Footer */
  .footer-grid { grid-template-columns: 1fr; gap: var(--sp-3); }
  .footer-bottom { flex-direction: column; align-items: flex-start; gap: var(--sp-2); }
  .footer-legal { flex-wrap: wrap; gap: 12px; }

  /* Platform / Tech Grid */
  .platform-grid { grid-template-columns: 1fr; gap: 12px; }

  /* Mockup Visual */
  .mockup-columns { grid-template-columns: 1fr; gap: 12px; }
  .mockup-col:nth-child(n+3) { display: none; }
  .mockup-topbar { padding: 8px 12px; }
  .mockup-topbar .tabs { display: none; }

  /* CTAs & Action Buttons */
  .hero-ctas {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
    width: 100%;
    max-width: 340px;
    margin-inline: auto;
  }
  .hero-ctas .btn {
    width: 100%;
    height: 46px;
    min-height: 46px;
    max-height: 46px;
    justify-content: center;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 600;
    border-radius: var(--radius-sm);
  }
  .hero-ctas .btn svg {
    width: 16px !important;
    height: 16px !important;
    max-width: 16px !important;
    max-height: 16px !important;
    min-width: 16px !important;
    min-height: 16px !important;
    margin-left: 6px;
    flex-shrink: 0 !important;
  }
  .cta-banner-actions {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
    width: 100%;
    max-width: 340px;
    margin-inline: auto;
  }
  .cta-banner-actions .btn {
    width: 100%;
    height: 46px;
    min-height: 46px;
    justify-content: center;
    padding: 10px 20px;
    font-size: 14px;
  }

  /* Hero Stats */
  .hero-stats {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  .hero-stats .stat {
    border-radius: var(--radius-sm);
    background: var(--surface-2);
  }

  /* Video / Media Frames */
  .hero-mockup {
    margin-inline: 0;
    padding: 12px;
    border-radius: var(--radius-md);
  }
  .video-poster .poster-frame { inset: var(--sp-2); }
  .play-btn { width: 56px; height: 56px; }
  .play-btn svg { width: 18px; height: 18px; }

  /* Mobile Navigation Panel */
  .mobile-panel {
    width: 86vw;
    max-width: 340px;
    padding: 20px 16px;
  }
  .mobile-links > li > a, .mobile-links summary {
    padding: 14px 4px;
    font-size: 15px;
  }
}

@media (max-width: 420px){
  :root { --nav-h: 64px; }
  
  .hero {
    padding-top: calc(var(--nav-h) + 16px);
  }
  .hero h1 {
    font-size: 1.75rem;
  }
  .hero .lede {
    font-size: 0.925rem;
  }
  .eyebrow {
    font-size: 11px;
    padding: 4px 10px;
  }
  
  .btn {
    padding: 11px 18px;
    font-size: 13.5px;
  }
  .btn-sm {
    padding: 7px 12px;
    font-size: 12px;
  }
  
  .testi-card {
    padding: 18px 14px;
  }
  .contact-form-card {
    padding: 18px 14px;
  }
  .back-to-top {
    right: 14px;
    bottom: 14px;
    width: 42px;
    height: 42px;
  }
}