/**
 * VSP (VISION PARTNERS) — Responsive Stylesheet
 * Breakpoints:
 *  - Desktop: >= 1024px
 *  - Tablet: 768px ~ 1023px
 *  - Mobile: <= 767px
 *  - prefers-reduced-motion
 */

/* ==========================================================================
   1. Tablet Styles (768px ~ 1023px)
   ========================================================================== */
@media (max-width: 1023px) {
  :root {
    --header-height: 72px;
    --section-padding-y: 80px;
  }

  .container {
    padding-left: 24px;
    padding-right: 24px;
  }

  /* Header */
  .nav-menu,
  .header-cta {
    display: none;
  }

  .hamburger-btn {
    display: flex;
  }

  /* Hero */
  .hero-main-title {
    font-size: 50px;
  }

  .hero-kr-slogan {
    font-size: 22px;
  }

  .hero-metrics {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  /* About */
  .about-intro-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .about-pillars-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  /* Services */
  .service-featured-card {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 36px 32px;
  }

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

  .services-sub-grid .service-sub-card:last-child {
    grid-column: span 2;
  }

  /* Projects Table */
  .projects-table-header {
    grid-template-columns: 60px 1fr 120px 100px;
    padding: 14px 18px;
    font-size: 12px;
  }

  .project-item-row {
    grid-template-columns: 60px 1fr 120px 100px;
    padding: 16px 18px;
  }

  .project-col-name {
    font-size: 15px;
  }

  /* Manpower */
  .manpower-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  /* Technology & R&D */
  .rnd-project-card {
    grid-template-columns: 1fr;
    gap: 36px;
    padding: 36px 32px;
  }

  /* Contact */
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }
}

/* ==========================================================================
   2. Mobile Styles (<= 767px)
   ========================================================================== */
@media (max-width: 767px) {
  :root {
    --header-height: 64px;
    --section-padding-y: 64px;
  }

  .container {
    padding-left: 20px;
    padding-right: 20px;
  }

  .editorial-header {
    margin-bottom: 40px;
  }

  .editorial-title {
    font-size: 32px;
  }

  .editorial-subtitle {
    font-size: 16px;
  }

  /* Hero */
  .hero-section {
    padding-top: calc(var(--header-height) + 32px);
    padding-bottom: 60px;
  }

  .hero-main-title {
    font-size: 38px;
    margin-bottom: 20px;
  }

  .hero-kr-slogan {
    font-size: 19px;
    margin-bottom: 12px;
  }

  .hero-sub-slogan {
    font-size: 15px;
    margin-bottom: 32px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
    margin-bottom: 48px;
  }

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

  .hero-metrics {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    padding-top: 28px;
  }

  .metric-val {
    font-size: 22px;
  }

  /* About */
  .about-lead-text {
    font-size: 18px;
  }

  .about-facts-table {
    padding: 20px;
  }

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

  /* Services */
  .service-featured-card {
    padding: 28px 20px;
  }

  .service-featured-title {
    font-size: 24px;
  }

  .service-feature-points {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .services-sub-grid {
    grid-template-columns: 1fr;
  }

  .services-sub-grid .service-sub-card:last-child {
    grid-column: span 1;
  }

  /* Projects Table Responsive (Cards on Mobile) */
  .projects-controls {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .projects-tabs {
    width: 100%;
  }

  .project-tab-btn {
    flex: 1;
    text-align: center;
    padding: 8px 12px;
    font-size: 14px;
  }

  .projects-table-header {
    display: none; /* Hide tabular header on small screens */
  }

  .project-item-row {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    padding: 16px 18px;
  }

  .project-item-top {
    display: flex;
    justify-content: space-between;
    width: 100%;
  }

  .project-col-no {
    font-size: 12px;
  }

  .project-col-name {
    font-size: 15px;
    margin: 4px 0;
  }

  .project-meta-wrap {
    display: flex;
    align-items: center;
    gap: 12px;
  }

  /* Manpower */
  .manpower-grid {
    grid-template-columns: 1fr;
  }

  .modal-container {
    max-height: 94vh;
  }

  .modal-header {
    padding: 20px;
  }

  .modal-role-en {
    font-size: 20px;
  }

  .modal-body {
    padding: 20px;
    gap: 20px;
  }

  .modal-footer {
    padding: 16px 20px;
  }

  /* R&D */
  .rnd-project-card {
    padding: 24px 20px;
  }

  .rnd-project-title {
    font-size: 22px;
  }

  .rnd-points-list {
    padding: 20px;
  }

  /* Contact */
  .contact-form-card {
    padding: 24px 20px;
  }

  .contact-detail-row {
    flex-direction: column;
    gap: 4px;
  }

  .contact-detail-key {
    min-width: unset;
  }

  /* Footer */
  .footer-top {
    flex-direction: column;
    gap: 32px;
  }

  .footer-nav {
    flex-wrap: wrap;
    gap: 20px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 42px;
    height: 42px;
  }
}

/* ==========================================================================
   3. prefers-reduced-motion Support
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .fade-in {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }

  .modal-container {
    transform: none !important;
    transition: none !important;
  }
}