/* ==========================================================================
   RESPONSIVE DESIGN & MOBILE-FIRST OPTIMIZATIONS - AKASH NEELGUND PORTFOLIO
   Targeting: 320px, 360px, 375px, 390px, 414px, 768px, 991px, 1024px, 1440px
   Zero horizontal overflow, accessible touch targets, fluid typography.
   ========================================================================== */

/* --- 1. Global Viewport Overflow Protection --- */
html, body {
  width: 100%;
  max-width: 100vw;
  overflow-x: hidden;
  position: relative;
}

/* --- 2. Mobile Drawer Backdrop Overlay --- */
.mobile-drawer-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 1050;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-medium), visibility var(--transition-medium);
}

.mobile-drawer-backdrop.active {
  opacity: 1;
  visibility: visible;
}

/* Mobile Drawer Positioning & Overflow Fix */
.mobile-drawer {
  position: fixed;
  top: 0;
  right: 0;
  width: 85%;
  max-width: 360px;
  height: 100vh;
  height: 100dvh; /* Dynamic mobile viewport height */
  background: #0d121d;
  border-left: 1px solid var(--border-medium);
  z-index: 1100;
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  transform: translateX(100%);
  visibility: hidden;
  transition: transform var(--transition-medium), visibility var(--transition-medium);
  box-shadow: -15px 0 45px rgba(0, 0, 0, 0.85);
}

.mobile-drawer.active {
  transform: translateX(0);
  visibility: visible;
}

/* --- 3. Tablets & Small Laptops (max-width: 991px) --- */
@media (max-width: 991px) {
  :root {
    --header-height: 72px;
  }

  .site-nav {
    height: 72px;
  }

  .site-nav.scrolled {
    height: 64px;
  }

  /* Switch desktop nav to hamburger drawer on tablets & mobile */
  .site-nav .nav-links-desktop,
  .site-nav .nav-actions .btn {
    display: none !important;
  }

  .mobile-menu-btn {
    display: flex !important;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: var(--border-radius-sm);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-subtle);
    color: var(--text-primary);
    font-size: 1.4rem;
    cursor: pointer;
  }

  .mobile-menu-btn:hover {
    background: rgba(0, 242, 254, 0.1);
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
  }

  /* Hero adjustments: Content first, visual supporting */
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 44px;
  }

  .hero-visual {
    order: 2; /* Keep headline & CTAs first for instant comprehension */
    margin-top: 10px;
  }

  .hero-visual-card {
    max-width: 100%;
  }

  /* Grids collapse to single columns or responsive matrices */
  .about-preview-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .services-grid,
  .projects-grid {
    grid-template-columns: 1fr !important;
  }

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

  .modal-details-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

  .service-detail-card {
    grid-template-columns: 1fr !important;
    gap: 28px !important;
  }
}

/* --- 4. Mobile Landscape & Phablets (max-width: 768px) --- */
@media (max-width: 768px) {
  .section {
    padding: 60px 0;
  }

  .section-header {
    margin-bottom: 36px;
  }

  .hero-section {
    padding-top: calc(var(--header-height) + 24px);
    padding-bottom: 60px;
  }

  .hero-title {
    font-size: clamp(2rem, 7vw, 2.8rem);
    line-height: 1.25;
  }

  .hero-description {
    font-size: 1.05rem;
    margin-bottom: 28px;
  }

  /* Stats Counter: 2x2 Grid */
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .stat-card {
    padding: 16px 8px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-subtle);
    border-radius: var(--border-radius-md);
  }

  .stat-card::after {
    display: none !important;
  }

  .stat-number {
    font-size: 2.2rem;
  }

  /* Form Layout */
  .form-group-row {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .contact-form-card {
    padding: 28px 18px;
  }

  .contact-info-card {
    padding: 28px 18px;
  }

  /* Testimonial slider */
  .testimonial-card {
    padding: 28px 18px;
  }

  .testimonial-quote {
    font-size: 1.05rem;
    line-height: 1.7;
    margin-bottom: 20px;
  }

  /* Footer */
  .footer-top-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .footer-bottom-bar {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }

  /* Horizontal Filter Bar with Smooth Mobile Swiping */
  .portfolio-filter-bar {
    justify-content: flex-start;
    overflow-x: auto;
    white-space: nowrap;
    padding: 4px 4px 12px 4px;
    gap: 8px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .portfolio-filter-bar::-webkit-scrollbar {
    display: none;
  }

  .filter-btn {
    flex-shrink: 0;
    padding: 8px 16px;
    font-size: 0.825rem;
  }

  /* On mobile touch devices, keep overlay buttons directly accessible or tap-friendly */
  .project-overlay {
    opacity: 1 !important;
    background: linear-gradient(to top, rgba(7, 9, 14, 0.92) 0%, rgba(7, 9, 14, 0.4) 60%, transparent 100%) !important;
    justify-content: flex-end !important;
    padding: 14px !important;
  }

  .project-overlay .btn {
    padding: 8px 14px !important;
    font-size: 0.8rem !important;
  }

  /* Floating WhatsApp */
  .floating-whatsapp {
    bottom: 20px;
    right: 20px;
    width: 52px;
    height: 52px;
    font-size: 1.5rem;
  }

  .whatsapp-tooltip {
    display: none; /* Avoid obstructing mobile viewport */
  }

  /* Modal on mobile */
  .modal-overlay {
    padding: 12px;
  }

  .modal-dialog {
    max-height: 94vh;
    border-radius: var(--border-radius-md);
  }

  .modal-header {
    padding: 16px 18px;
  }

  .modal-scroll-body {
    padding: 18px 16px;
  }

  .modal-title {
    font-size: 1.35rem;
  }

  .modal-actions-bar {
    flex-direction: column;
    gap: 10px;
  }

  .modal-actions-bar .btn {
    width: 100%;
  }

  /* Process Cards */
  .process-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .process-card {
    padding: 24px 20px;
  }

  /* Why Grid */
  .why-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  /* Services Detail Cards in services.html */
  .service-detail-card {
    padding: 24px 18px !important;
  }

  .faq-grid {
    grid-template-columns: 1fr !important;
  }

  /* Timeline in about.html */
  .timeline {
    padding-left: 26px !important;
  }

  .timeline-dot {
    left: -26px !important;
    width: 18px !important;
    height: 18px !important;
  }

  .timeline-card {
    padding: 18px 16px !important;
  }
}

/* --- 5. Mobile Portrait (max-width: 480px) --- */
@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .section {
    padding: 50px 0;
  }

  .section-tag {
    font-size: 0.75rem;
    padding: 5px 12px;
  }

  .hero-salutation {
    font-size: 1.15rem;
  }

  .hero-role-badge {
    font-size: 0.95rem;
    margin-bottom: 12px;
  }

  .hero-title {
    font-size: clamp(1.85rem, 8vw, 2.3rem);
  }

  .hero-cta-group {
    flex-direction: column;
    width: 100%;
    gap: 12px;
  }

  .hero-cta-group .btn {
    width: 100%;
    padding: 14px 20px;
  }

  .hero-socials {
    flex-wrap: wrap;
    gap: 10px;
  }

  .hero-visual-card {
    padding: 22px 16px;
  }

  .avatar-circle {
    width: 56px;
    height: 56px;
    font-size: 1.3rem;
  }

  .floating-pill {
    padding: 10px 14px;
    font-size: 0.85rem;
  }

  .floating-pill .pill-metric {
    font-size: 0.75rem;
  }

  .about-highlights {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .about-highlight-box {
    padding: 16px;
  }

  /* Skills Card on Home */
  .about-skills-card {
    padding: 22px 16px !important;
  }

  /* Project Cards */
  .project-card-body {
    padding: 20px 16px;
  }

  .project-title {
    font-size: 1.25rem;
  }

  .project-card-footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .project-card-footer .project-external-link {
    align-self: flex-start;
  }

  .cta-box h2 {
    font-size: 1.85rem;
  }

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

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

  .skills-grid-detailed {
    grid-template-columns: 1fr !important;
  }
}

/* --- 6. Extra Small Phones (down to 320px) --- */
@media (max-width: 360px) {
  .container {
    padding: 0 12px;
  }

  .nav-logo {
    font-size: 1.05rem;
  }

  .nav-logo-sub {
    font-size: 0.58rem;
  }

  .hero-title {
    font-size: 1.7rem;
  }

  .stat-number {
    font-size: 1.85rem;
  }

  .stat-label {
    font-size: 0.78rem;
  }

  .contact-form-card,
  .contact-info-card {
    padding: 20px 12px;
  }

  .floating-whatsapp {
    bottom: 16px;
    right: 16px;
    width: 48px;
    height: 48px;
    font-size: 1.35rem;
  }
}