:root{
    --bg: #F5F7F7;
    --panel: #FFFFFF;
    --ink: #16232A;
    --ink-soft: #55676E;
    --line: #DCE3E4;
    --teal: #0E7C86;
    --teal-deep: #0A5A62;
    --amber: #E8871E;
    --amber-soft: #FCEEDC;
    --danger: #C4472A;
    --radius: 14px;
  }
  *{box-sizing:border-box;}
  html,body{margin:0;padding:0;}
  body{
    background: var(--bg);
    color: var(--ink);
    font-family: 'Inter', system-ui, sans-serif;
    -webkit-font-smoothing: antialiased;
    padding-bottom: 96px;
  }
  h1,h2,h3, .num{
    font-family: 'Space Grotesk', 'Inter', sans-serif;
  }

  header{
    background: linear-gradient(135deg, var(--teal-deep), var(--teal));
    color: white;
    padding: 22px 18px 26px;
    border-radius: 0 0 20px 20px;
    position: relative;
    overflow: hidden;
  }
  header::after{
    content:"";
    position:absolute; right:-40px; top:-40px;
    width:160px; height:160px;
    border-radius: 50%;
    background: rgba(255,255,255,0.08);
    pointer-events: none;
  }
  header::before{
    content:"";
    position:absolute; right:30px; bottom:-60px;
    width:110px; height:110px;
    border-radius: 50%;
    background: rgba(255,255,255,0.06);
    pointer-events: none;
  }
  .brand{
    display:flex; align-items:center; gap:10px;
    font-size: 13px; letter-spacing: 0.14em; text-transform: uppercase;
    opacity: 0.85; margin-bottom: 6px; font-weight:600;
  }
  .brand svg{width:18px; height:18px; flex-shrink:0;}
  header h1{
    margin:0; font-size: 24px; font-weight:700; line-height:1.25;
    position:relative; z-index:1;
  }
  header p{
    margin: 6px 0 0; font-size: 13.5px; opacity:0.85; max-width: 320px;
    position:relative; z-index:1;
  }

  main{ padding: 16px 14px 0; max-width: 560px; margin: 0 auto; }

  .card{
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 16px;
    margin-bottom: 12px;
  }
  .card h2{
    font-size: 12.5px; text-transform: uppercase; letter-spacing:0.08em;
    color: var(--teal-deep); margin: 0 0 12px; font-weight:700;
    display:flex; align-items:center; gap:7px;
  }
  .step-dot{
    width:18px; height:18px; border-radius:50%;
    background: var(--teal); color:white;
    display:inline-flex; align-items:center; justify-content:center;
    font-size:10.5px; font-weight:700; font-family:'Space Grotesk',sans-serif;
    flex-shrink:0;
  }

  label{
    display:block; font-size: 13px; font-weight:600; margin: 12px 0 6px;
    color: var(--ink);
  }
  label:first-of-type{ margin-top:0; }
  input[type=text], input[type=tel]{
    width:100%; padding: 11px 12px; border-radius: 10px;
    border: 1.5px solid var(--line); font-size: 15px; font-family:inherit;
    background: #FBFCFC; color: var(--ink);
  }
  input:focus{ outline: 2px solid var(--teal); outline-offset:1px; border-color:var(--teal); }

  .opt-grid{ display:grid; gap:8px; }
  .opt-grid.cols-2{ grid-template-columns: 1fr 1fr; }
  .opt-grid.cols-3{ grid-template-columns: repeat(3, 1fr); }

  .opt{
    border: 1.5px solid var(--line);
    background: #FBFCFC;
    border-radius: 10px;
    padding: 10px 8px;
    font-size: 13.5px;
    font-weight: 600;
    color: var(--ink-soft);
    text-align:center;
    cursor:pointer;
    user-select:none;
    transition: border-color .12s, background .12s, color .12s;
    line-height:1.3;
  }
  .opt small{ display:block; font-weight:500; font-size:11px; opacity:0.75; margin-top:2px;}
  .opt.active{
    border-color: var(--teal);
    background: var(--teal);
    color: white;
  }
  .opt.active small{ opacity:0.9; }
  .opt.amber.active{ background: var(--amber); border-color: var(--amber); }

  select{
    width:100%; padding: 11px 12px; border-radius: 10px;
    border: 1.5px solid var(--line); font-size: 15px; font-family:inherit;
    background: #FBFCFC; color: var(--ink); appearance:none;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2355676E' stroke-width='2'><polyline points='6 9 12 15 18 9'/></svg>");
    background-repeat: no-repeat; background-position: right 12px center; background-size: 18px;
  }

  textarea{
    width:100%; padding: 11px 12px; border-radius: 10px;
    border: 1.5px solid var(--line); font-size: 14.5px; font-family: inherit;
    background: #FBFCFC; color: var(--ink); resize: vertical; min-height: 60px;
  }

  .hint{ font-size:12px; color:var(--ink-soft); margin-top:5px; }
  .hint.warn{ color: var(--danger); font-weight:600; }

  .summary-card{
    background: var(--ink);
    color: white;
    border-radius: var(--radius);
    padding: 18px 16px;
  }
  .summary-card h2{ color: rgba(255,255,255,0.6); }
  .line-item{
    display:flex; justify-content:space-between; align-items:baseline;
    font-size: 13.5px; padding: 7px 0; border-bottom: 1px solid rgba(255,255,255,0.08);
    color: rgba(255,255,255,0.85);
  }
  .line-item span:last-child{ font-family:'Space Grotesk',sans-serif; font-weight:600; }
  .line-item.empty{ color: rgba(255,255,255,0.35); font-style: italic; }
  .line-item.discount span:last-child{ color:#7CD9A8; }
  .total-row{
    display:flex; justify-content:space-between; align-items:flex-end;
    margin-top: 14px; padding-top: 12px; border-top: 1.5px solid rgba(255,255,255,0.2);
  }
  .total-row .label{ font-size:12px; text-transform:uppercase; letter-spacing:0.08em; color: rgba(255,255,255,0.6); font-weight:600;}
  .total-row .num{ font-size: 30px; font-weight:700; }
  .total-sub{ font-size:11.5px; color: rgba(255,255,255,0.45); margin-top:2px; }

  .actions{ display:flex; gap:10px; margin-top: 16px; }
  .actions-row{ display:flex; gap:10px; margin-top:8px; }
  .btn{
    flex:1; border:none; border-radius: 10px; padding: 13px 10px;
    font-size: 14px; font-weight:700; font-family:'Inter',sans-serif;
    display:flex; align-items:center; justify-content:center; gap:7px;
    cursor:pointer; transition: transform .1s, opacity .1s;
  }
  .btn:active{ transform: scale(0.97); }
  .btn svg{ width:16px; height:16px; }
  .btn-whatsapp{ background:#25D366; color:#0B2E1B; }
  .btn-pdf{ background: var(--amber); color:#3A2405; }
  .btn-email{ background: rgba(255,255,255,0.12); color:white; border: 1px solid rgba(255,255,255,0.25); }
  .btn-copy{ background: transparent; color: rgba(255,255,255,0.55); font-size:12.5px; font-weight:600; padding: 8px; }
  .btn:disabled{ opacity:0.4; cursor:not-allowed; }

  .sticky-bar{
    position: fixed; bottom:0; left:0; right:0;
    background: var(--panel);
    border-top: 1px solid var(--line);
    padding: 10px 16px calc(10px + env(safe-area-inset-bottom));
    display:flex; justify-content:space-between; align-items:center;
    box-shadow: 0 -4px 16px rgba(0,0,0,0.06);
  }
  .sticky-bar .label{ font-size:11px; color:var(--ink-soft); text-transform:uppercase; letter-spacing:0.06em; font-weight:600; }
  .sticky-bar .num{ font-size:20px; font-weight:700; color: var(--teal-deep); }

  .notice{
    background: var(--amber-soft); border: 1px solid #F0CC9A; color: #8A5411;
    border-radius: 10px; padding: 10px 12px; font-size: 12.5px; margin-top: 10px; line-height:1.4;
  }

  footer{ text-align:center; padding: 18px 16px 8px; font-size:11px; color:var(--ink-soft); }

  /* Login screen */
  #loginScreen{
    min-height: 100vh;
    display:flex;
    align-items:center;
    justify-content:center;
    padding: 20px;
  }
  .login-box{
    background: var(--panel);
    border-radius: var(--radius);
    padding: 28px 24px;
    max-width: 380px;
    width: 100%;
    box-shadow: 0 4px 24px rgba(0,0,0,0.06);
  }
  .login-box h1{
    font-family:'Space Grotesk', sans-serif;
    font-size: 20px;
    margin: 0 0 4px;
    color: var(--ink);
  }
  .login-box p{
    color: var(--ink-soft);
    font-size: 13px;
    margin: 0 0 20px;
  }
  #loginError{
    display:none;
    background: #FDECEA;
    color: var(--danger);
    border-radius: 8px;
    padding: 10px 12px;
    font-size: 13px;
    margin-bottom: 12px;
  }
  #btnLogin{
    width: 100%;
    background: var(--teal);
    color: white;
    border: none;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    font-size: 14px;
    padding: 12px;
    border-radius: 10px;
    cursor: pointer;
  }
  #btnLogin:disabled{ opacity: 0.6; cursor: not-allowed; }

  /* Botón hamburguesa */
  #btnMenuToggle{
    background: transparent;
    border: 1px solid rgba(255,255,255,0.4);
    padding: 8px 10px;
    border-radius: 8px;
    cursor: pointer;
    position: absolute;
    top: 16px;
    right: 16px;
    z-index: 5;
    display: flex;
  }
  #btnMenuToggle svg{ width:18px; height:18px; display:block; }

  /* Menú lateral */
  #menuBackdrop{
    position: fixed;
    inset: 0;
    background: rgba(15,25,25,0.45);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
    z-index: 40;
  }
  #menuBackdrop.open{ opacity: 1; pointer-events: auto; }

  #sideMenu{
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 260px;
    max-width: 80vw;
    background: var(--panel);
    box-shadow: 4px 0 24px rgba(0,0,0,0.15);
    transform: translateX(-100%);
    transition: transform 0.25s ease;
    z-index: 50;
    display: flex;
    flex-direction: column;
    padding: 18px 14px;
  }
  #sideMenu.open{ transform: translateX(0); }

  .side-menu-header{
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600;
    font-size: 15px;
    color: var(--ink);
    padding: 8px 10px 18px;
    border-bottom: 1px solid var(--line);
    margin-bottom: 10px;
  }

  .menu-item{
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    background: transparent;
    border: none;
    text-align: left;
    padding: 12px 10px;
    border-radius: 10px;
    font-family: 'Inter', sans-serif;
    font-size: 14px;
    font-weight: 500;
    color: var(--ink-soft);
    cursor: pointer;
  }
  .menu-item svg{ width:18px; height:18px; flex-shrink:0; }
  .menu-item.active{ background: rgba(14,124,134,0.1); color: var(--teal-deep); font-weight: 600; }
  .menu-item:hover{ background: rgba(14,124,134,0.06); }
  .menu-item-danger{ color: var(--danger); }
  .menu-item-danger:hover{ background: #FDECEA; }

  .menu-divider{ height: 1px; background: var(--line); margin: 8px 4px; }

  /* Toast de aviso */
  .toast-aviso{
    position: fixed;
    left: 50%;
    bottom: 90px;
    transform: translateX(-50%) translateY(20px);
    background: var(--ink);
    color: white;
    padding: 12px 18px;
    border-radius: 10px;
    font-size: 13px;
    font-weight: 500;
    box-shadow: 0 6px 20px rgba(0,0,0,0.25);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
    z-index: 100;
    max-width: 85vw;
    text-align: center;
  }
  .toast-aviso.show{ opacity: 1; transform: translateX(-50%) translateY(0); }
  .toast-aviso.toast-error{ background: var(--danger); }

  /* Presupuestos guardados */
  .presupuesto-item{
    background: var(--panel);
    border-radius: var(--radius);
    padding: 14px 16px;
    margin-bottom: 10px;
    box-shadow: var(--shadow);
  }
  .presupuesto-top{ display:flex; justify-content:space-between; align-items:flex-start; gap:10px; }
  .presupuesto-item .cliente{ font-weight:600; color:var(--ink); font-size:14px; }
  .presupuesto-item .meta{ font-size:12px; color:var(--ink-soft); margin-top:2px; }
  .presupuesto-item .total{ font-weight:700; color:var(--ink); font-size:15px; white-space:nowrap; }
  .estado-row{ display:flex; align-items:center; gap:10px; margin-top:10px; }
  .badge{ font-size:11px; font-weight:600; padding:4px 10px; border-radius:999px; }
  .badge-enviado{ background:#EAF1F7; color:#3C6E9E; }
  .badge-aceptado{ background:#E7F5EE; color:#1F8A5A; }
  .badge-rechazado{ background:#FDECEA; color:var(--danger); }
  .estado-select{ margin:0; padding:6px 10px; font-size:12px; width:auto; flex:1; }
  .btn-ver-detalle{
    background: transparent;
    border: 1px solid var(--line);
    color: var(--ink-soft);
    font-size: 12px;
    padding: 6px 10px;
    border-radius: 8px;
    cursor: pointer;
  }
  .presupuesto-top{ cursor: pointer; }
  .presupuesto-detalle{
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px dashed var(--line);
  }
  .detalle-linea{
    display: flex;
    justify-content: space-between;
    gap: 10px;
    font-size: 12.5px;
    color: var(--ink-soft);
    padding: 3px 0;
  }
  .detalle-linea.discount span:last-child{ color: #7CD9A8; }
  .detalle-linea.detalle-total{
    font-weight: 700;
    color: var(--ink);
    font-size: 13.5px;
    border-top: 1px solid var(--line);
    margin-top: 6px;
    padding-top: 8px;
  }
  .detalle-notas{ font-size:12px; color:var(--ink-soft); margin-top:8px; font-style:italic; }
  .btn-duplicar{
    width: 100%;
    background: var(--teal);
    color: white;
    border: none;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    font-size: 13px;
    padding: 10px;
    border-radius: 10px;
    cursor: pointer;
    margin-top: 12px;
  }
  #btnProponerModelo, #btnGuardarRetencion{
    width: 100%;
    background: white;
    color: var(--teal);
    border: 1.5px solid var(--teal);
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    font-size: 13px;
    padding: 10px;
    border-radius: 10px;
    cursor: pointer;
  }
  #btnProponerModelo:disabled, #btnGuardarRetencion:disabled{ opacity: 0.6; cursor: not-allowed; }

  /* Panel admin */
  .propuesta-item{
    background: var(--panel);
    border-radius: var(--radius);
    padding: 14px 16px;
    margin-bottom: 10px;
    box-shadow: var(--shadow);
  }
  .propuesta-item .marca{ font-weight: 600; color: var(--ink); font-size: 14px; }
  .propuesta-item .meta{ font-size: 12px; color: var(--ink-soft); margin: 4px 0 10px; }
  .propuesta-item .acciones{ display:flex; gap: 8px; }
  .btn-aprobar, .btn-rechazar{
    flex: 1;
    border: none;
    padding: 9px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
  }
  .btn-aprobar{ background: var(--teal); color: white; }
  .btn-rechazar{ background: #FDECEA; color: var(--danger); }
  .btn-aprobar:disabled, .btn-rechazar:disabled{ opacity: 0.5; cursor: not-allowed; }
  header{ position: relative; }
  #loadingScreen{
    min-height: 100vh;
    display:flex;
    align-items:center;
    justify-content:center;
    color: var(--ink-soft);
    font-size: 14px;
  }