/* ==========================================================================
   PALAKURLA SHIVAKUMAR - CYBERSECURITY PORTFOLIO
   Responsive Breakpoints & Mobile Styles
   ========================================================================== */

/* --------------------------------------------------------------------------
   Desktop & Tablet Large (max-width: 1024px)
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .hero-visual {
    order: -1;
  }

  .hero-card {
    max-width: 360px;
  }

  .credibility-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .journey-roadmap {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
  }

  .youtube-spotlight-card {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .footer-top-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem;
  }
}

/* --------------------------------------------------------------------------
   Tablet & Mobile Navigation (max-width: 860px)
   -------------------------------------------------------------------------- */
@media (max-width: 860px) {
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: min(320px, 80vw);
    height: 100vh;
    background: rgba(12, 16, 26, 0.96);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-left: 1px solid var(--border-medium);
    flex-direction: column;
    align-items: flex-start;
    padding: 5rem 2rem 2rem;
    gap: 1rem;
    transition: right var(--transition-normal);
    z-index: 1500;
    box-shadow: var(--shadow-lg);
  }

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

  .nav-link {
    font-size: 1.05rem;
    width: 100%;
    padding: 0.6rem 0.5rem;
    border-bottom: 1px solid var(--border-subtle);
  }

  .mobile-toggle {
    display: flex;
    z-index: 1600;
  }

  .mobile-toggle.active svg {
    transform: rotate(90deg);
  }

  .section {
    padding-top: 4.5rem;
    padding-bottom: 4.5rem;
  }

  .timeline-wrap {
    max-width: 100%;
  }

  .timeline-line {
    left: 22px;
  }

  .timeline-card-item {
    grid-template-columns: 52px 1fr;
    gap: 0.9rem;
    padding-left: 0;
  }

  .timeline-node {
    width: 24px;
    height: 24px;
    margin-left: 10px;
    margin-top: 0.9rem;
  }

  .timeline-card {
    padding: 1.3rem 1rem 1.1rem;
  }
}

/* --------------------------------------------------------------------------
   Small Mobile Devices (max-width: 580px)
   -------------------------------------------------------------------------- */
@media (max-width: 580px) {
  .container {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .hero-section {
    padding-top: calc(var(--header-height) + 2rem);
    padding-bottom: 3.5rem;
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .hero-visual {
    width: 100%;
  }

  .hero-surface {
    max-width: 100%;
    padding: 0.9rem;
  }

  .hero-photo-frame {
    aspect-ratio: 1 / 1.16;
    max-width: 100%;
    border-radius: 22px;
    margin-bottom: 0.9rem;
  }

  .hero-photo-img {
    object-fit: cover;
    object-position: center 18%;
    transform: scale(1.02);
  }

  .surface-stack {
    gap: 0.45rem;
    margin-bottom: 0.9rem;
  }

  .surface-pill {
    flex: 1 1 calc(50% - 0.3rem);
    text-align: center;
    font-size: 0.68rem;
    padding: 0.5rem 0.55rem;
  }

  .surface-metric-grid {
    gap: 0.6rem;
  }

  .mini-stat {
    padding: 0.8rem 0.6rem;
  }

  .mini-stat strong {
    font-size: 1.5rem;
  }

  .mini-stat span {
    letter-spacing: 0.04em;
  }

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

  .hero-actions .btn {
    width: 100%;
  }

  .credibility-grid {
    grid-template-columns: 1fr;
  }

  .about-highlights-list {
    grid-template-columns: 1fr;
  }

  .stats-showcase-grid {
    grid-template-columns: 1fr;
  }

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

  .form-row-2 {
    grid-template-columns: 1fr;
  }

  .contact-form-card {
    padding: 1.5rem 1rem;
  }

  .footer-top-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

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

  .cert-grid {
    grid-template-columns: 1fr;
  }
}