/* ==========================================================================
   ELECTRORECK — MOBILE & RESPONSIVE DESIGN SYSTEM
   Breakpoints: 
   - 1024px: Laptops & Tablets Landscape
   - 900px:  Tablets Portrait & Large Phablets
   - 768px:  Mobile Landscape / Standard Mobile
   - 640px:  Mobile Portrait
   - 480px:  Compact Mobile (iPhone SE, Small Androids)
   - 360px:  Ultra-Compact Devices
   ========================================================================== */

/* Prevent horizontal overflow globally */
html, body {
  max-width: 100vw;
  overflow-x: hidden;
  position: relative;
}

/* ==========================================================================
   1024px — LAPTOPS & TABLETS (LANDSCAPE)
   ========================================================================== */
@media (max-width: 1024px) {
  .container {
    padding: 0 20px;
  }

  .hero-title {
    font-size: 3.46rem;
  }

  .event-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .footer-grid {
    grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
    gap: 36px;
  }
}

/* ==========================================================================
   900px — TABLETS (PORTRAIT)
   ========================================================================== */
@media (max-width: 900px) {
  .hero-container {
    text-align: center;
    align-items: center;
  }

  .about-wrapper {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .why-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

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

  .event-detail-wrap {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .detail-card {
    position: static;
  }

  .reg-layout {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .reg-event-summary-card {
    position: static;
  }
}

/* ==========================================================================
   768px — MOBILE PHONES (PRIMARY BREAKPOINT)
   ========================================================================== */
@media (max-width: 768px) {
  /* Navigation Bar */
  .navbar .nav-container {
    height: 64px;
    padding: 0 16px;
  }

  .mobile-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    padding: 6px;
    background: var(--black-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--white);
    cursor: pointer;
    transition: var(--transition);
  }

  .mobile-toggle:hover {
    border-color: var(--gold);
    color: var(--gold);
  }

  /* Hide Desktop CTA and Admin top button on mobile header to prevent crowding */
  .nav-actions .btn-nav-cta,
  .nav-actions .btn-nav-admin {
    display: none !important;
  }

  .nav-actions {
    gap: 8px;
  }

  .theme-toggle-btn {
    width: 38px;
    height: 38px;
  }

  /* Mobile Slide-Down Drawer */
  .nav-menu {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    width: 100%;
    max-height: calc(100vh - 64px);
    overflow-y: auto;
    background-color: var(--black-card);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: stretch;
    padding: 20px 16px 28px 16px;
    gap: 8px;
    transform: translateY(-120%);
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s ease;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    z-index: 9999;
    box-shadow: none;
  }

  .nav-menu.open {
    transform: translateY(0);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
  }

  .nav-menu li {
    width: 100%;
  }

  .nav-link {
    display: block;
    width: 100%;
    padding: 12px 14px;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 500;
    color: var(--white-soft);
    transition: all var(--transition);
  }

  .nav-link:hover,
  .nav-link.active {
    background: rgba(234, 169, 67, 0.1);
    color: var(--gold);
  }

  .nav-link::after {
    display: none;
  }

  .mobile-only-item {
    display: block !important;
    width: 100%;
    padding-top: 14px;
    margin-top: 6px;
    border-top: 1px solid var(--border);
  }

  .nav-admin-mobile {
    display: flex !important;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 12px;
    border-radius: var(--radius-sm);
    background: rgba(234, 169, 67, 0.12) !important;
    border: 1px solid var(--border-gold);
    color: var(--gold) !important;
    font-weight: 600;
    text-align: center;
  }

  /* Hero Section */
  .hero {
    padding: 64px 0 44px;
  }

  .hero-title,
  .editorial-title {
    font-size: clamp(2.455rem, 8.5vw, 3.355rem);
    line-height: 1.08;
    margin-bottom: 12px;
  }

  .hero-tagline {
    font-size: 1rem;
    margin-bottom: 14px;
    line-height: 1.4;
  }

  .hero-description {
    font-size: 0.80rem;
    line-height: 1.65;
    margin-bottom: 26px;
    padding: 0 8px;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
    gap: 12px;
    margin-bottom: 28px;
  }

  .hero-actions .btn {
    width: 100%;
    max-width: 320px;
    justify-content: center;
    text-align: center;
  }

  .hero-stats-bar {
    grid-template-columns: repeat(3, 1fr);
    padding: 14px 12px;
    gap: 8px;
    width: 100%;
  }

  .stat-num {
    font-size: 1.3rem;
  }

  .stat-label {
    font-size: 0.65rem;
    letter-spacing: 0.03em;
  }

  /* Events Header & Filter Chips */
  .events-editorial-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    padding-bottom: 16px;
  }

  .events-filters {
    flex-wrap: nowrap;
    overflow-x: auto;
    width: 100%;
    padding-bottom: 8px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    gap: 8px;
    margin-bottom: 26px;
  }

  .events-filters::-webkit-scrollbar {
    display: none;
  }

  .filter-btn {
    flex-shrink: 0;
    padding: 8px 16px;
    font-size: 0.82rem;
    white-space: nowrap;
  }

  .event-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  /* Form Grids */
  .form-row {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  /* FAQ Responsive */
  .faq-section {
    padding: 70px 0;
  }

  .faq-header {
    margin-bottom: 32px;
  }

  .faq-category-pills {
    flex-wrap: nowrap;
    overflow-x: auto;
    justify-content: flex-start;
    width: 100%;
    padding-bottom: 8px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    gap: 8px;
    margin-bottom: 24px;
  }

  .faq-category-pills::-webkit-scrollbar {
    display: none;
  }

  .faq-cat-pill {
    flex-shrink: 0;
    padding: 7px 14px;
    font-size: 0.78rem;
    white-space: nowrap;
  }

  .faq-question-btn {
    padding: 18px 20px;
    font-size: 0.96rem;
    gap: 12px;
  }

  .faq-answer-content {
    padding: 0 20px 20px 20px;
    font-size: 0.76rem;
  }
}

/* ==========================================================================
   640px — PHONES PORTRAIT
   ========================================================================== */
@media (max-width: 640px) {
  .container {
    padding: 0 16px;
  }

  .section {
    padding: 56px 0;
  }

  /* Brand Typography in Navbar */
  .brand-logo-img {
    width: 38px;
    height: 38px;
  }

  .brand-name {
    font-size: 1.235rem;
  }

  .brand-sub {
    font-size: 0.58rem;
  }

  /* Cards */
  .card-img-wrap {
    height: 190px;
  }

  .card-body {
    padding: 18px 16px;
  }

  .card-title {
    font-size: 1.15rem;
  }

  .card-footer {
    gap: 10px;
  }

  .btn-card-details,
  .btn-card-register {
    padding: 10px 12px;
    font-size: 0.82rem;
  }

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

  .about-visual-right {
    padding: 28px 20px;
  }

  .about-logo-center {
    width: 100px;
    height: 100px;
    margin-bottom: 18px;
  }

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

  .modal-card {
    width: 100%;
    max-width: 100%;
    border-radius: var(--radius-md);
    max-height: 90vh;
  }

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

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

  .modal-footer {
    padding: 14px 16px 18px;
  }

  .reg-ticket-card {
    padding: 16px;
  }

  .ticket-reg-id {
    font-size: 1.25rem;
  }

  .ticket-grid {
    grid-template-columns: 1fr !important;
    gap: 12px !important;
  }

  /* Footer: STRICT SINGLE-COLUMN ON MOBILE */
  .footer {
    padding: 52px 0 24px;
  }

  .footer-grid {
    grid-template-columns: 1fr !important;
    gap: 32px;
    margin-bottom: 36px;
  }

  .footer-brand-desc {
    max-width: 100%;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 18px;
    padding-top: 20px;
  }

  .footer-bottom-right {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
}

/* ==========================================================================
   480px — COMPACT SMARTPHONES (iPhone SE, Galaxy A, Small Devices)
   ========================================================================== */
@media (max-width: 480px) {
  .container {
    padding: 0 14px;
  }

  .hero {
    padding: 50px 0 36px;
  }

  .hero-title,
  .editorial-title {
    font-size: clamp(2.155rem, 9.8vw, 2.755rem);
  }

  .brand-name {
    font-size: 1.19rem;
  }

  .hero-tagline {
    font-size: 0.92rem;
  }

  .hero-description {
    font-size: 0.74rem;
    line-height: 1.6;
    margin-bottom: 22px;
  }

  /* Stats Bar compact horizontal */
  .hero-stats-bar {
    grid-template-columns: repeat(3, 1fr);
    padding: 12px 8px;
    gap: 4px;
  }

  .stat-num {
    font-size: 1.15rem;
  }

  .stat-label {
    font-size: 0.58rem;
    letter-spacing: 0.02em;
  }

  /* Why Join Us Card */
  .why-card {
    padding: 20px 16px;
  }

  .why-num {
    font-size: 1.4rem;
  }

  .why-title {
    font-size: 1.05rem;
  }

  .why-desc {
    font-size: 0.85rem;
  }

  /* About Box */
  .about-content-left h2 {
    font-size: 1.8rem;
  }

  .about-text {
    font-size: 0.92rem;
  }

  .highlight-title {
    font-size: 1rem;
  }

  .highlight-desc {
    font-size: 0.78rem;
  }

  .about-motto {
    font-size: 1rem;
    letter-spacing: 0.05em;
  }

  /* FAQ */
  .faq-question-btn {
    padding: 15px 16px;
    font-size: 0.92rem;
  }

  .faq-icon-wrapper {
    width: 28px;
    height: 28px;
  }

  .faq-answer-content {
    padding: 0 16px 16px 16px;
    font-size: 0.73rem;
  }

  /* Footer */
  .footer-brand-title {
    font-size: 1.275rem;
  }

  .footer-contact-card {
    padding: 14px 14px;
  }

  .contact-item {
    font-size: 0.68rem;
  }
}