/* ==========================================================================
   EV PAYANAM - RESPONSIVE STYLES
   Breakpoints: 320px, 480px, 640px, 768px, 1024px, 1440px+
   Tested for zero horizontal overflow & optimal touch targets
   ========================================================================== */

/* Large Desktops / Ultra-wide (1440px+) */
@media (min-width: 1440px) {
  :root {
    --max-width: 1320px;
  }
}

/* Tablets & Small Laptops (max-width: 1024px) */
@media (max-width: 1024px) {
  .section {
    padding: 84px 0;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 48px;
    text-align: center;
  }

  .hero-pill-group {
    justify-content: center;
  }

  .hero-mode-switcher {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-cta-group {
    justify-content: center;
  }

  .hero-info-bar {
    justify-content: center;
  }

  .hero-telemetry-strip {
    max-width: 580px;
    margin-left: auto;
    margin-right: auto;
  }

  .hero-visual-wrapper {
    max-width: 580px;
    margin: 0 auto;
  }

  .intro-content-wrap {
    grid-template-columns: 1fr;
    gap: 24px;
    text-align: center;
  }

  .intro-pillars-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .roadmap-timeline {
    grid-template-columns: repeat(2, 1fr);
  }

  .contact-layout {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }

  .footer-brand {
    grid-column: span 2;
  }
}

/* Mobile & Small Tablets (max-width: 768px) */
@media (max-width: 768px) {
  :root {
    --header-height: 72px;
    --header-height-scrolled: 64px;
  }

  .section {
    padding: 70px 0;
  }

  /* Hamburger and Drawer Navigation */
  .menu-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 82%;
    max-width: 320px;
    height: 100vh;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.15);
    flex-direction: column;
    align-items: flex-start;
    padding: 100px 32px 40px;
    gap: 22px;
    transition: right var(--transition-normal);
    z-index: 1005;
  }

  .nav-menu.open {
    right: 0;
  }

  .nav-link {
    font-size: 1.15rem;
    width: 100%;
    padding: 10px 0;
  }

  .nav-actions .btn {
    display: none;
  }

  .nav-menu .mobile-nav-cta {
    display: block;
    width: 100%;
    margin-top: 16px;
  }

  .nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(8, 17, 13, 0.55);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-fast);
    z-index: 1004;
  }

  .nav-overlay.open {
    opacity: 1;
    pointer-events: auto;
  }

  .roadmap-timeline {
    grid-template-columns: 1fr;
  }

  .comparison-header {
    padding: 20px 24px;
    font-size: 0.95rem;
  }

  .comparison-rows {
    padding: 12px 24px;
  }

  .comparison-row {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .footer-brand {
    grid-column: span 1;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 14px;
  }

  .footer-bottom-links {
    justify-content: center;
  }
}

/* Phones (max-width: 580px) */
@media (max-width: 580px) {
  .hero-telemetry-strip {
    grid-template-columns: 1fr;
    gap: 12px;
    text-align: left;
  }

  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }

  .hero-cta-group .btn {
    width: 100%;
  }

  .contact-form-card {
    padding: 28px 20px;
  }

  .email-highlight-box {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .copy-btn {
    width: 100%;
    justify-content: center;
  }
}

/* Extra Small Devices (320px - 380px) */
@media (max-width: 380px) {
  .container {
    padding: 0 16px;
  }

  .h1-hero {
    font-size: 2.1rem;
  }

  .h2-section {
    font-size: 1.75rem;
  }

  .badge {
    font-size: 0.72rem;
    padding: 4px 12px;
  }

  .btn {
    padding: 12px 22px;
    font-size: 0.88rem;
  }

  .category-pills {
    flex-direction: column;
  }
}