/* ============================================================
   ZhuMobile — Responsive CSS (Mobile-First Breakpoints)
   ============================================================ */

/* ── Base (mobile first) styles ── */
/* These override defaults for small screens. Larger screens build on top. */

/* ── 320px+ (extra-small phones) ── */
@media screen and (max-width: 359px) {
  .hero-headline { font-size: clamp(2rem, 12vw, 2.6rem); }
  .section-title { font-size: clamp(1.7rem, 8vw, 2.2rem); }
  .nav { padding: 0 16px; }
  .section { padding: 72px 16px 60px; }
  .hero-stats { flex-direction: column; gap: 16px; }
  .services-grid { grid-template-columns: 1fr; }
  .solutions-grid { grid-template-columns: 1fr; }
  .btn-primary, .btn-secondary { width: 100%; text-align: center; }
}

/* ── 480px+ ── */
@media screen and (min-width: 480px) {
  .hero-headline { font-size: clamp(2.4rem, 9vw, 3.6rem); }
  .section-title { font-size: clamp(2rem, 7vw, 2.8rem); }
  .hero-stats { flex-direction: row; flex-wrap: wrap; }
  .why-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ── 768px+ (tablets) ── */
@media screen and (min-width: 768px) {
  :root {
    --nav-h: 72px;
    --section-px: 48px;
  }

  .hero-headline { font-size: clamp(3rem, 6vw, 5rem); }
  .section-title { font-size: clamp(2.2rem, 4.5vw, 3.2rem); }
  .section { padding: 100px 48px 90px; }

  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .solutions-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .process-steps { flex-direction: column; }
  .why-grid { grid-template-columns: repeat(3, 1fr); }
  .contact-grid { grid-template-columns: 1fr 1fr; gap: 48px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero-cta { flex-direction: row; }
}

/* ── 1024px+ (laptops) ── */
@media screen and (min-width: 1024px) {
  :root {
    --nav-h: 72px;
    --section-px: 80px;
  }

  body { cursor: none; }
  #cursor, #cursor-trail { display: block; }

  .nav-links { display: flex; }
  .nav-hamburger { display: none; }

  .hero-headline { font-size: clamp(3.5rem, 5.5vw, 6rem); }
  .section { padding: 120px 80px 100px; }

  .services-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .solutions-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .process-steps {
    flex-direction: row;
    align-items: flex-start;
  }
  .why-metrics {
    grid-template-columns: repeat(3, 1fr);
  }
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
  #hero-canvas {
    display: block;
  }

  /* Tech diagram visible on desktop */
  .tech-diagram { display: flex; }
}

/* ── 1440px+ (wide laptops / small desktops) ── */
@media screen and (min-width: 1440px) {
  .section-inner { max-width: 1280px; }
  .hero-headline { font-size: clamp(5rem, 5vw, 7rem); }
  .services-grid { grid-template-columns: repeat(4, 1fr); }
  .solutions-grid { grid-template-columns: repeat(3, 1fr); }
}

/* ── 1920px+ (full HD / ultrawide) ── */
@media screen and (min-width: 1920px) {
  :root { --section-px: 120px; }
  .section-inner { max-width: 1440px; }
  .hero-headline { font-size: 7.5rem; }
  .services-grid { grid-template-columns: repeat(4, 1fr); }
}

/* ── Print ── */
@media print {
  #loader, #cursor, #cursor-trail, #bg-canvas,
  #mouse-gradient, .nav, .hero-scroll,
  #read-progress, .peel-widget { display: none !important; }
  body { color: #000 !important; background: #fff !important; }
  .section { padding: 40px 0 !important; }
  .card { break-inside: avoid; }
}

/* ── Mobile-specific overrides ── */
@media screen and (max-width: 1023px) {
  body { cursor: auto; }
  #cursor, #cursor-trail { display: none; }
  #mouse-gradient { display: none; }
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
  /* peel is 60px on mobile */
  .nav-logo { margin-left: 44px; }
  #hero-canvas { display: none; }

  #tech-canvas { display: none; }
  .tech-layout { grid-template-columns: 1fr; }
  .tech-features { max-width: 100%; }

  .process-connector { display: none; }

  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }

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

@media screen and (max-width: 767px) {
  :root { --nav-h: 60px; }
  .section { padding: 80px 24px 72px; }
  .nav { padding: 0 20px; }

  .hero-stats { gap: 20px; }
  .hero-stats-item { min-width: 120px; }

  .services-grid { grid-template-columns: 1fr; }
  .solutions-grid { grid-template-columns: 1fr; }
  .why-grid { grid-template-columns: 1fr 1fr; }
  .why-features { grid-template-columns: 1fr; }
  .why-metrics { grid-template-columns: repeat(2, 1fr); }

  /* Collapse form row to single column */
  .form-row { grid-template-columns: 1fr; gap: 0; }

  .contact-form { padding: 24px; }

  .testimonial-card { padding: 28px 22px; }
  .testimonial-nav { flex-direction: row; }
  .faq-item { padding: 18px 0; }

  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }

  .global-stats { gap: 28px; }

  /* Mobile peel: smaller size handled in main.js */
}

/* ── Foldable devices (narrow) ── */
@media screen and (max-width: 319px) {
  .hero-headline { font-size: 1.8rem; }
  .section-title { font-size: 1.6rem; }
  .section { padding: 64px 12px 56px; }
}

/* ── High DPI displays ── */
@media screen and (-webkit-min-device-pixel-ratio: 2),
       screen and (min-resolution: 192dpi) {
  #bg-canvas { image-rendering: auto; }
}

/* ── Landscape phone ── */
@media screen and (max-height: 500px) and (orientation: landscape) {
  .hero { min-height: 100svh; padding-top: var(--nav-h); }
  #hero-canvas { display: none; }
}