/* ====== CSS VARIABLES (MATCHES MAIN CORE SYSTEM) ====== */
    :root {
      --text-main: #0f172a;
      --text-muted: #64748b;
      --primary: #2563eb;
      --primary-hover: #1d4ed8;
      --primary-soft: #f0f6ff;
      --border-color: rgba(226, 232, 240, 0.8);
      --container-width: 1240px;
      
      --fs-display: clamp(2.2rem, 4.5vw, 3.2rem);      
      --fs-title: clamp(1.5rem, 3vw, 2rem);      
      --fs-card-hd: 1.15rem;                       
      --fs-body: 0.95rem;       
      --fs-caption: 0.82rem;                          

      --fw-bold: 700;
      --fw-semibold: 600;
      --fw-medium: 500;
      --fw-normal: 400;

      --radius-lg: 24px;
      --radius-md: 16px;
      --radius-sm: 12px;
      
      --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    /* ====== GLOBAL RESET & BACKGROUND MESH ====== */
    html {
      scroll-behavior: smooth;
    }

  

    /* ====== HERO SETUP ====== */
    .shipper-hero {
      padding-to: 10px;
    }

    .section__head {
      text-align: center;
      max-width: 46rem;
      margin: 0 auto 3.5rem;
    }

    .premium-badge {
      background: #ffffff;
      color: var(--primary);
      padding: 0.45rem 1rem;
      border-radius: 99px;
      font-size: var(--fs-caption);
      font-weight: var(--fw-semibold);
      letter-spacing: 0.06em;
      text-transform: uppercase;
      display: inline-block;
      margin-bottom: 1.2rem;
      border: 1px solid var(--border-color);
      box-shadow: 0 2px 8px rgba(15, 23, 42, 0.02);
    }

    .premium-title {
      font-size: var(--fs-display);
      line-height: 1.15;
      font-weight: var(--fw-bold);
      color: var(--text-main);
      letter-spacing: -0.03em;
    }

    .gradient-text {
      background: linear-gradient(135deg, #2563eb 30%, #1d4ed8 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .premium-subtitle {
      font-size: 1.05rem;
      color: var(--text-muted);
      margin-top: 1.2rem;
      line-height: 1.6;
    }

    /* ====== WORKSPACE CATAGORY BUTTONS (INTERNAL NAV) ====== */
    .shipper-nav-wrapper {
      max-width: 950px;
      margin: 0 auto 4rem;
    }

    .shipper-nav {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 0.5rem;
      background: rgba(255, 255, 255, 0.7);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      padding: 0.5rem;
      border-radius: var(--radius-md);
      border: 1px solid rgba(255, 255, 255, 0.6);
      box-shadow: 0 12px 34px -10px rgba(15, 23, 42, 0.03);
    }

    .s-nav-btn {
      background: transparent;
      border: none;
      padding: 0.85rem 1rem;
      border-radius: var(--radius-sm);
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 0.4rem;
      cursor: pointer;
      text-align: center;
      transition: var(--transition-smooth);
    }

    .s-nav-btn i {
      font-size: 1.2rem;
      color: var(--text-muted);
      transition: var(--transition-smooth);
    }

    .s-nav-btn strong {
      font-size: 0.9rem;
      color: var(--text-main);
      font-weight: var(--fw-semibold);
    }

    .s-nav-btn.active {
      background: #ffffff;
      box-shadow: 0 4px 18px rgba(37, 99, 235, 0.08);
    }

    .s-nav-btn.active i {
      color: var(--primary);
    }

    .s-nav-btn.active strong {
      color: var(--primary);
    }

    /* ====== PANELS, GRIDS, CARDS ====== */
    .shipper-panel {
      display: none;
      opacity: 0;
      transform: translateY(12px);
    }

    .shipper-panel.active {
      display: block;
      opacity: 1;
      transform: translateY(0);
      transition: opacity 0.4s ease, transform 0.4s ease;
    }

    .panel-header {
      margin-bottom: 2.5rem;
      border-bottom: 1px solid var(--border-color);
      padding-bottom: 1rem;
    }

    .panel-header h2 {
      font-size: var(--fs-title);
      font-weight: var(--fw-bold);
      color: var(--text-main);
    }

    .panel-header p {
      color: var(--text-muted);
      font-size: var(--fs-body);
      margin-top: 0.25rem;
    }

    .shipper-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
      gap: 1.5rem;
    }

    /* Premium Dynamic Feature Cards Setup */
    .feature-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 2.2rem 2rem;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: var(--transition-smooth);
    }

    .feature-card:hover {
      transform: translateY(-4px);
      border-color: rgba(37, 99, 235, 0.3);
      box-shadow: 0 20px 35px -10px rgba(15, 23, 42, 0.06);
    }

    .card-icon {
      width: 44px;
      height: 44px;
      background: var(--primary-soft);
      color: var(--primary);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      margin-bottom: 1.5rem;
    }

    .feature-card h3 {
      font-size: var(--fs-card-hd);
      font-weight: var(--fw-semibold);
      color: var(--text-main);
      margin-bottom: 0.6rem;
    }

    .feature-card p {
      font-size: var(--fs-body);
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* ====== RESPONSIVE TWEAKS ====== */
    @media (max-width: 992px) {
      .shipper-nav {
        grid-template-columns: 1fr;
        gap: 0.4rem;
      }
      .shipper-grid {
        grid-template-columns: 1fr;
      }
    }