.r4f-shell{--r4-red:#e53935;--r4-ink:#171d2b;--r4-muted:#6d7480;font-family:Inter,Arial,sans-serif;max-width:1000px;margin:25px auto;background:#fff;border:1px solid #e8ebf0;border-radius:24px;box-shadow:0 18px 60px rgba(20,30,50,.07);overflow:hidden;color:var(--r4-ink)}.r4f-intro{background:linear-gradient(115deg,#151a25,#292f3c);color:#fff;padding:34px 40px}.r4f-eyebrow{color:#ff7774;font-weight:800;font-size:11px;letter-spacing:.18em}.r4f-intro h2{color:#fff;margin:8px 0;font-size:clamp(26px,3vw,38px);line-height:1.15}.r4f-intro p{color:#cbd0da;margin:0}.r4f-section{padding:30px 40px;border-bottom:1px solid #ecedf1}.r4f-heading{display:flex;align-items:flex-start;gap:15px;margin-bottom:24px}.r4f-heading>b{background:#fff1f0;color:var(--r4-red);font-size:14px;border-radius:11px;padding:11px 12px}.r4f-heading h3{font-size:20px;margin:0 0 5px;color:var(--r4-ink)}.r4f-heading p{color:var(--r4-muted);font-size:13px;margin:0}.r4f-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.r4f-field{display:flex;flex-direction:column;gap:7px;min-width:0;font-weight:600;font-size:13px;color:#323946}.r4f-field em{color:var(--r4-red);font-style:normal}.r4f-field input,.r4f-field select,.r4f-field textarea{font-size:15px;font-family:inherit;color:#202634;min-width:0;display:block;width:100%;box-sizing:border-box;border:1px solid #d9dee7;background:#fff;border-radius:11px;padding:13px 14px;outline:none;line-height:1.4;transition:border .15s,box-shadow .15s}.r4f-field input:focus,.r4f-field select:focus,.r4f-field textarea:focus{border-color:var(--r4-red);box-shadow:0 0 0 3px rgba(229,57,53,.12)}.r4f-field input[type=file]{padding:13px 9px}.r4f-field small{color:#7d8390;font-size:11px;line-height:1.5;font-weight:400}.r4f-wide{grid-column:1/-1}.r4f-footer{padding:30px 40px;background:#f9fafc;display:flex;gap:24px;align-items:center;justify-content:space-between}.r4f-footer p{font-size:13px;color:#626979;max-width:470px;line-height:1.6;margin:0}.r4f-cta{display:inline-flex;align-items:center;justify-content:center;gap:14px;padding:15px 20px;color:#fff!important;background:var(--r4-red);border:0;border-radius:12px;cursor:pointer;font-weight:800;font-size:14px;text-align:center;text-decoration:none;transition:transform .15s,background .15s;white-space:normal}.r4f-cta:hover{background:#bf2623;transform:translateY(-1px)}.r4f-alert{margin:20px 40px 0;padding:14px 18px;background:#fff2f2;border:1px solid #ffc8c8;border-radius:11px;color:#902624}.r4f-success{background:#ecfdf2;border-color:#a5e7b5;color:#17653a}.r4f-gate{padding:45px;text-align:center}.r4f-gate h3{margin:0 0 12px}@media(max-width:700px){.r4f-shell{border-radius:16px;margin:10px 0}.r4f-intro,.r4f-section,.r4f-footer{padding:24px 20px}.r4f-grid{grid-template-columns:1fr}.r4f-footer{align-items:stretch;flex-direction:column}.r4f-cta{width:100%}}

.r4f-vin{margin:22px 0;padding:18px 22px;background:#f7f8fa;border:1px solid #e5e7ec;border-left:4px solid #e53935;border-radius:12px;font-family:Inter,Arial,sans-serif}.r4f-vin-label{display:block;font-size:12px;color:#6d7480;text-transform:uppercase;font-weight:700;letter-spacing:.06em}.r4f-vin-value{display:block;margin-top:5px;color:#171d2b;font-size:19px;letter-spacing:.045em;overflow-wrap:anywhere}.r4f-vin small{display:block;margin-top:7px;color:#6d7480;font-size:11px;line-height:1.5}

.r4f-title-preview{border:1px solid #f1c6c5;background:linear-gradient(115deg,#fff8f7,#fff);padding:20px 22px;border-radius:14px;display:flex;flex-direction:column;gap:8px}.r4f-title-preview>span{font-size:11px;letter-spacing:.09em;color:#ba2925;font-weight:800}.r4f-title-preview>strong{font-size:clamp(18px,2.1vw,25px);line-height:1.25;color:#202634}.r4f-title-preview>small{font-size:12px;line-height:1.45;color:#697386}

.r4f-tech{margin-top:20px;padding:16px 18px;background:#f7f9fc;border:1px solid #dde3ec;border-radius:12px}.r4f-tech strong{display:block;margin-bottom:8px}.r4f-tech p{margin:4px 0;color:#525e72;font-size:13px}.r4f-feature-title{margin:24px 0 12px;font-size:17px;color:#202634}.r4f-feature-search{margin-bottom:12px}.r4f-feature-search label{display:block;font-size:12px;font-weight:700;margin-bottom:7px}.r4f-feature-search input{border-radius:10px;border:1px solid #d9dee7;padding:12px;width:100%;box-sizing:border-box}.r4f-feature-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:9px;max-height:290px;overflow:auto;padding:5px}.r4f-feature{display:flex;align-items:center;gap:8px;border:1px solid #e3e7ef;padding:9px 11px;border-radius:9px;font-size:12px;cursor:pointer}.r4f-feature:hover{border-color:#e53935}.r4f-feature input{accent-color:#e53935;width:17px;height:17px;flex-shrink:0}.r4f-feature[hidden]{display:none!important}.r4f-feature-note{display:block;margin-top:10px;font-size:12px;color:#667085}@media(max-width:700px){.r4f-feature-list{grid-template-columns:repeat(2,minmax(0,1fr))}}
/* 4Ruedas premium UI v1.6 */
.r4f-shell{max-width:1120px;border-radius:28px;box-shadow:0 24px 75px rgba(18,26,43,.11);border:1px solid #edf0f5;background:#fff;overflow:hidden}.r4f-intro{padding:48px 52px;background:radial-gradient(circle at 92% 0%,rgba(229,57,53,.30),transparent 42%),linear-gradient(135deg,#121724,#242c3c 75%);position:relative}.r4f-intro:after{content:'4R';position:absolute;right:40px;bottom:5px;font-size:150px;font-weight:900;line-height:1;color:rgba(255,255,255,.035);pointer-events:none}.r4f-intro h2{font-size:clamp(30px,4.4vw,46px);max-width:650px;letter-spacing:-.035em}.r4f-intro>p{max-width:670px;line-height:1.7}.r4f-intro-chips{display:flex;gap:10px;flex-wrap:wrap;margin-top:25px}.r4f-intro-chips span{background:rgba(255,255,255,.1);color:#fff;border:1px solid rgba(255,255,255,.13);border-radius:50px;padding:8px 12px;font-size:12px;font-weight:600}.r4f-section{padding:34px 52px}.r4f-heading{align-items:center;margin-bottom:27px}.r4f-heading .r4f-step{background:#f6f7fa;color:#89909e;border-radius:9px;font-size:12px;padding:9px}.r4f-heading-icon{width:48px;height:48px;background:#fff0ef;color:#e53935;display:inline-flex;align-items:center;justify-content:center;border-radius:14px;flex-shrink:0}.r4f-icon{width:23px;height:23px;display:inline-block;flex-shrink:0}.r4f-heading h3{font-size:22px;letter-spacing:-.025em;font-weight:800}.r4f-heading p{font-size:13px}.r4f-field>span:first-child{font-size:13px;font-weight:750}.r4f-field input:not([type=file]),.r4f-field select,.r4f-field textarea{min-height:47px;background:#fbfcfe;border-color:#dfe4ed}.r4f-title-preview{background:linear-gradient(110deg,#fff8f8,#fff);border:1px solid #f6ddda;border-left:4px solid #e53935}.r4f-tech{border:1px solid #e5eaf2;background:#f8fafc}.r4f-feature{background:#fff;transition:.15s ease}.r4f-feature:has(input:checked){background:#fff1f0;border-color:#e53935;color:#ae211e}.r4f-media-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.r4f-uploader{display:flex;flex-direction:column;align-items:center;text-align:center;gap:8px;padding:25px 14px;border:2px dashed #ced6e2;border-radius:19px;background:#fafbfd;cursor:pointer;transition:background .2s,border-color .2s;min-height:230px;box-sizing:border-box}.r4f-uploader:hover,.r4f-uploader:focus-within{background:#fff7f6;border-color:#e53935}.r4f-uploader-icon{display:grid;place-items:center;width:52px;height:52px;border-radius:15px;background:#fff1f0;color:#e53935;margin-bottom:3px}.r4f-uploader strong{font-size:16px;color:#202637}.r4f-uploader em{font-style:normal;color:#e53935}.r4f-uploader>span:not(.r4f-uploader-icon):not(.r4f-file-label):not(.r4f-photo-preview):not(.r4f-video-preview){color:#596578;font-size:13px}.r4f-uploader small{font-size:11px;color:#768195}.r4f-uploader input[type=file]{position:absolute;inline-size:1px;block-size:1px;opacity:0;pointer-events:none}.r4f-file-label{padding:10px 16px;border-radius:9px;background:#222b3a;color:#fff;font-weight:700;font-size:12px;margin-top:9px}.r4f-video-upload{grid-column:1/-1;min-height:175px}.r4f-photo-preview{width:100%;display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin-top:7px}.r4f-photo-preview img{width:88px;height:66px;object-fit:cover;border-radius:9px;border:1px solid #e2e7ef}.r4f-photo-preview:not(:empty),.r4f-video-preview:not(:empty){background:#fff;border:1px solid #e8edf4;border-radius:11px;padding:9px}.r4f-video-preview{font-size:12px;color:#394257;max-width:100%;overflow-wrap:anywhere}.r4f-video-preview video{width:min(100%,350px);max-height:210px;display:block;border-radius:10px;margin:8px auto 0}.r4f-media-tip{display:flex;align-items:center;gap:8px;color:#687385;font-size:12px;margin:16px 0 0}.r4f-media-tip .r4f-icon{width:18px;height:18px;color:#2e7d32}.r4f-footer{padding:32px 52px}.r4f-cta{border-radius:14px;min-height:53px;box-shadow:0 10px 22px rgba(229,57,53,.2)}.r4f-cta:disabled{opacity:.65;cursor:wait}@media(max-width:700px){.r4f-intro,.r4f-section,.r4f-footer{padding:25px 19px}.r4f-intro:after{display:none}.r4f-heading{gap:9px}.r4f-heading-icon{width:40px;height:40px}.r4f-heading h3{font-size:19px}.r4f-media-grid{grid-template-columns:1fr}.r4f-video-upload{grid-column:auto}.r4f-uploader{min-height:205px}.r4f-intro-chips{gap:6px}.r4f-intro-chips span{font-size:10px}}