:root {
      --primary: #2563eb;
      --primary-dark: #1e40af;
      --secondary: #f59e0b;
      --accent: #10b981;
      --dark: #1e293b;
      --light: #f8fafc;
      --gray: #64748b;
      --light-gray: #e2e8f0;
      --radius: 14px;
      --shadow: 0 20px 40px rgba(2, 6, 23, .08);
      --transition: all .25s ease;
    }
    *{box-sizing:border-box;margin:0;padding:0;font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif}
    body{background:linear-gradient(rgba(2,6,23,.72),rgba(2,6,23,.72)),url('https://www.shutterstock.com/image-photo/automotive-engineer-working-on-electric-600nw-2204219067.jpg') center/cover fixed;color:var(--dark)}
    .container{max-width:1100px;margin:0 auto;padding:24px}

    .page-head{
      background:linear-gradient(135deg, var(--primary), var(--primary-dark));
      color: #000;
      padding:64px 24px;margin-bottom:24px;
      box-shadow: var(--shadow);
    }
    .page-title{font-size:2.2rem;font-weight:800;margin-bottom:8px;color:#000}
    .page-title i{color:#000}
    .page-sub{opacity:1;color:#000}

    .grid{display:grid;grid-template-columns:1.2fr .8fr;gap:24px}

    .card{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:20px}
    .card h3{margin-bottom:12px}
    .muted{color:var(--gray)}

    .form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .form-row + .form-row{margin-top:14px}
    .form-group{display:flex;flex-direction:column;gap:8px}
    label{font-weight:600}
    input,select,textarea{border:2px solid var(--light-gray);border-radius:10px;padding:12px 14px;font-size:15px;outline:none;transition:var(--transition);background:#fff}
    input:focus,select:focus,textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(37,99,235,.12)}
    textarea{min-height:110px;resize:vertical}

    .uploader{border:2px dashed var(--light-gray);border-radius:12px;padding:18px;text-align:center;cursor:pointer;color:var(--gray);transition:var(--transition)}
    .uploader:hover{border-color:var(--primary);color:var(--primary)}

    .btn{display:inline-flex;align-items:center;gap:10px;justify-content:center;padding:14px 18px;border-radius:12px;border:none;font-weight:700;cursor:pointer;transition:var(--transition)}
    .btn-primary{background:var(--primary);color:#fff}
    .btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px)}
    .btn-outline{background:#fff;border:2px solid var(--primary);color:var(--primary)}

    .tip{background:#f1f5ff;border-left:4px solid var(--primary);padding:12px 14px;border-radius:10px;color:#334155}
    .list{display:grid;gap:12px}
    .car-item{display:flex;gap:12px;padding:12px;border:1px solid var(--light-gray);border-radius:12px}
    .car-item img{width:96px;height:72px;object-fit:cover;border-radius:10px}
    .car-item .title{font-weight:700}
    .car-item .meta{color:var(--gray);font-size:.92rem}

    @media (max-width: 900px){
      .grid{grid-template-columns:1fr}
    }

    /* Standardized Navbar (enhanced) */
    .main-nav{position:fixed;top:0;left:0;width:100%;
      background:linear-gradient(180deg, rgba(255,255,255,.9), rgba(255,255,255,.82));
      backdrop-filter:saturate(1.2) blur(8px);
      box-shadow:0 10px 30px rgba(2,6,23,.12);
      z-index:1000;padding:15px 0;transition:all 0.3s ease;border-bottom:1px solid rgba(148,163,184,.25)}
    .main-nav.scrolled{padding:15px 0;background:linear-gradient(180deg, rgba(255,255,255,.98), rgba(255,255,255,.94));box-shadow:0 12px 32px rgba(2,6,23,.16)}
    .nav-container{display:flex;justify-content:space-between;align-items:center}
    .nav-logo{display:flex;align-items:center;gap:12px;font-weight:700;font-size:1.5rem;color:#1e40af}
    .nav-logo svg{width:40px;height:40px}
    .nav-menu{display:flex;list-style:none;gap:30px}
    .nav-menu a{color:#1e293b;font-weight:600;position:relative;text-decoration:none;padding:8px 6px;border-radius:6px;transition:all .25s ease}
    .nav-menu a::after{content:'';position:absolute;bottom:-6px;left:0;width:0;height:2px;background-color:#2563eb;transition:all 0.3s ease}
    .nav-menu a:hover::after,.nav-menu a.active::after{width:100%}
    .nav-menu a.active{color:#2563eb}
    .nav-menu a:hover{background:rgba(37,99,235,.08)}
    .nav-actions{display:flex;gap:15px;margin-left:36px;position:relative}
    .nav-actions::before{content:'';position:absolute;left:-18px;top:50%;transform:translateY(-50%);width:1px;height:28px;background:rgba(148,163,184,.5)}
    .nav-toggle{display:none;flex-direction:column;cursor:pointer}
    .nav-toggle span{width:25px;height:3px;background-color:#1e293b;margin:2px 0;transition:all 0.3s ease}

    /* Push content below fixed navbar */
    body{padding-top:90px}