*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#0a0c10;
  --s1:#0f1117;
  --s2:#151820;
  --s3:#1c2028;
  --border:#232836;
  --border2:#2e3545;
  --accent:#3b82f6;
  --accent-glow:rgba(59,130,246,.2);
  --accent2:#f59e0b;
  --green:#10b981;
  --red:#ef4444;
  --text:#e2e8f0;
  --text2:#94a3b8;
  --text3:#475569;
  --mono:'IBM Plex Mono',monospace;
  --sans:'IBM Plex Sans',sans-serif;
}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--text);font-family:var(--sans);font-size:14px;min-height:100vh;overflow-x:hidden}
 
/* Subtle scanline texture */
body::after{
  content:'';position:fixed;inset:0;z-index:0;pointer-events:none;
  background:repeating-linear-gradient(0deg,transparent,transparent 2px,rgba(0,0,0,.03) 2px,rgba(0,0,0,.03) 4px);
}
 
/* ═══════════════════════════════════════
   SCREEN SYSTEM
═══════════════════════════════════════ */
.screen{display:none;position:relative;z-index:1;min-height:100vh}
.screen.active{display:flex}
 
/* ═══════════════════════════════════════
   AUTH SCREENS (Login / Register / Forgot)
═══════════════════════════════════════ */
#loginScreen,#registerScreen,#forgotScreen{
  align-items:center;justify-content:center;padding:1.5rem;
  background:radial-gradient(ellipse at 50% 0%,rgba(59,130,246,.06) 0%,transparent 70%)
}
.auth-wrap{width:100%;max-width:440px;animation:authIn .4s ease both}
@keyframes authIn{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}
 
.auth-logo{margin-bottom:2rem}
.auth-logo .brand{font-family:var(--mono);font-size:1.1rem;font-weight:500;color:var(--accent);letter-spacing:.12em;display:flex;align-items:center;gap:.5rem}
.auth-logo .brand::before{content:'';width:8px;height:8px;background:var(--accent);border-radius:50%;box-shadow:0 0 8px var(--accent)}
.auth-logo h1{font-size:1.8rem;font-weight:700;color:#fff;margin-top:.5rem;letter-spacing:-.02em}
.auth-logo p{font-size:.8rem;color:var(--text3);margin-top:.25rem;font-family:var(--mono)}
 
.auth-card{
  background:var(--s1);border:1px solid var(--border);border-radius:8px;
  padding:2rem;position:relative;
}
.auth-card::before{
  content:'';position:absolute;top:0;left:24px;right:24px;height:1px;
  background:linear-gradient(90deg,transparent,var(--accent),transparent);opacity:.6
}
 
.field{margin-bottom:1.1rem}
.field label{
  display:block;font-size:.7rem;font-family:var(--mono);
  text-transform:uppercase;letter-spacing:.12em;color:var(--text3);
  margin-bottom:.4rem
}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:.75rem}
 
input[type=text],input[type=password],input[type=email],input[type=tel],input[type=number],textarea,select{
  width:100%;background:var(--bg);border:1px solid var(--border2);border-radius:5px;
  color:var(--text);font-family:var(--mono);font-size:.82rem;padding:.65rem .85rem;
  outline:none;transition:border-color .2s,box-shadow .2s;line-height:1.5
}
input:focus,textarea:focus,select:focus{
  border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow)
}
input::placeholder,textarea::placeholder{color:var(--text3)}
textarea{resize:vertical;min-height:72px}
input[type=number]{-moz-appearance:textfield}
input[type=number]::-webkit-inner-spin-button{-webkit-appearance:none}
 
.btn{
  width:100%;padding:.72rem;border:none;border-radius:5px;
  font-family:var(--sans);font-size:.85rem;font-weight:600;
  letter-spacing:.04em;cursor:pointer;transition:all .2s;
  display:flex;align-items:center;justify-content:center;gap:.5rem
}
.btn:active{transform:scale(.98)}
.btn:disabled{opacity:.45;cursor:not-allowed;transform:none}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover:not(:disabled){background:#2563eb;box-shadow:0 4px 14px rgba(59,130,246,.35)}
.btn-ghost{background:transparent;color:var(--accent);border:1px solid var(--border2)}
.btn-ghost:hover{background:rgba(59,130,246,.06);border-color:var(--accent)}
.btn-green{background:var(--green);color:#fff}
.btn-green:hover:not(:disabled){background:#059669;box-shadow:0 4px 14px rgba(16,185,129,.35)}
 
.msg-err{font-family:var(--mono);font-size:.72rem;color:var(--red);margin-top:.45rem;min-height:1em;display:flex;align-items:center;gap:.3rem}
.msg-ok{font-family:var(--mono);font-size:.72rem;color:var(--green);margin-top:.45rem;display:flex;align-items:center;gap:.3rem}
.auth-link{font-size:.78rem;color:var(--text3);text-align:center;margin-top:1.1rem;font-family:var(--mono)}
.auth-link a{color:var(--accent);cursor:pointer;text-decoration:none}
.auth-link a:hover{text-decoration:underline}
 
.divider{display:flex;align-items:center;gap:.75rem;margin:1.1rem 0}
.divider::before,.divider::after{content:'';flex:1;height:1px;background:var(--border)}
.divider span{font-size:.65rem;color:var(--text3);font-family:var(--mono);letter-spacing:.1em}
 
/* ═══════════════════════════════════════
   APP SCREEN
═══════════════════════════════════════ */
#appScreen{display:none;flex-direction:column}
#appScreen.active{display:flex}
 
/* Top bar */
.topbar{
  position:sticky;top:0;z-index:50;
  background:rgba(10,12,16,.9);backdrop-filter:blur(16px);
  border-bottom:1px solid var(--border);
  display:flex;align-items:center;justify-content:space-between;
  padding:.7rem 1.25rem;gap:1rem
}
.topbar-logo{font-family:var(--mono);font-size:.9rem;font-weight:500;color:var(--accent);display:flex;align-items:center;gap:.5rem}
.topbar-logo::before{content:'';width:6px;height:6px;background:var(--green);border-radius:50%;box-shadow:0 0 6px var(--green);animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
.topbar-logo span{color:var(--text3);font-size:.72rem;display:none}
@media(min-width:500px){.topbar-logo span{display:inline}}
.topbar-right{display:flex;align-items:center;gap:.6rem}
 
/* User button */
.user-btn{
  display:flex;align-items:center;gap:.5rem;
  background:var(--s2);border:1px solid var(--border);border-radius:5px;
  padding:.35rem .75rem;cursor:pointer;transition:all .2s;
  font-family:var(--mono);font-size:.72rem;color:var(--text);
  position:relative
}
.user-btn:hover{border-color:var(--accent);color:var(--accent)}
.user-btn .avatar{
  width:22px;height:22px;background:var(--accent);border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-size:.65rem;font-weight:700;color:#fff;flex-shrink:0
}
 
/* User dropdown */
.user-dropdown{
  position:absolute;top:calc(100% + 8px);right:0;width:280px;
  background:var(--s1);border:1px solid var(--border2);border-radius:8px;
  box-shadow:0 16px 48px rgba(0,0,0,.6);z-index:100;
  opacity:0;pointer-events:none;transform:translateY(-8px);
  transition:all .2s;overflow:hidden
}
.user-dropdown.open{opacity:1;pointer-events:all;transform:translateY(0)}
.user-dropdown-head{padding:1rem;border-bottom:1px solid var(--border);background:var(--s2)}
.user-dropdown-head .name{font-weight:600;font-size:.9rem;color:#fff}
.user-dropdown-head .info{font-family:var(--mono);font-size:.7rem;color:var(--text3);margin-top:.2rem}
.user-dropdown-item{
  display:flex;align-items:center;gap:.6rem;padding:.7rem 1rem;
  font-size:.82rem;color:var(--text2);cursor:pointer;transition:background .15s
}
.user-dropdown-item:hover{background:var(--s3);color:var(--text)}
.user-dropdown-item svg{opacity:.6}
.user-dropdown-sep{height:1px;background:var(--border);margin:.25rem 0}
.user-dropdown-item.danger{color:var(--red)}
.user-dropdown-item.danger:hover{background:rgba(239,68,68,.08)}
 
.btn-topout{
  padding:.38rem .75rem;background:transparent;border:1px solid var(--border);border-radius:4px;
  font-family:var(--mono);font-size:.68rem;color:var(--text3);cursor:pointer;
  text-transform:uppercase;letter-spacing:.1em;transition:all .2s
}
.btn-topout:hover{border-color:var(--red);color:var(--red)}
 
/* Progress */
.progress-bar{height:2px;background:var(--border);flex-shrink:0}
.progress-fill{height:100%;background:linear-gradient(90deg,var(--accent),var(--green));width:0%;transition:width .5s}
.progress-label{
  display:flex;align-items:center;justify-content:space-between;
  padding:.4rem 1.25rem;background:var(--s1);border-bottom:1px solid var(--border);
  font-family:var(--mono);font-size:.65rem;color:var(--text3)
}
.progress-label span{color:var(--accent)}
 
/* Main content */
.app-content{max-width:860px;margin:0 auto;width:100%;padding:1.5rem 1rem 5rem}
 
/* ═══════════════════════════════════════
   FORM SECTIONS
═══════════════════════════════════════ */
.sec{margin-bottom:1.25rem;border:1px solid var(--border);border-radius:8px;overflow:hidden}
.sec-hd{
  display:flex;align-items:center;gap:.75rem;
  padding:.85rem 1.1rem;background:var(--s2);cursor:pointer;
  user-select:none;transition:background .15s;position:relative
}
.sec-hd:hover{background:var(--s3)}
.sec-hd::after{
  content:'';position:absolute;left:0;top:0;bottom:0;width:3px;
  background:var(--accent);border-radius:0 2px 2px 0
}
.sec-icon{font-size:.95rem;flex-shrink:0}
.sec-name{font-size:.9rem;font-weight:600;flex:1;letter-spacing:.02em}
.sec-count{font-family:var(--mono);font-size:.63rem;color:var(--text3);background:var(--s3);border-radius:3px;padding:.15rem .45rem;border:1px solid var(--border)}
.sec-chev{color:var(--text3);font-size:.7rem;transition:transform .25s;flex-shrink:0}
.sec.closed .sec-chev{transform:rotate(-90deg)}
.sec-body{padding:1rem 1.1rem}
.sec.closed .sec-body{display:none}
 
/* Questions */
.q-wrap{padding:.65rem 0;border-bottom:1px solid var(--border)}
.q-wrap:last-child{border-bottom:none;padding-bottom:0}
.q-meta{font-family:var(--mono);font-size:.65rem;color:var(--text3);margin-bottom:.35rem;display:flex;align-items:center;gap:.5rem}
.q-meta .qnum{color:var(--accent);font-weight:500}
.q-meta .unit{background:rgba(245,158,11,.1);color:var(--accent2);border:1px solid rgba(245,158,11,.2);border-radius:3px;padding:.05rem .35rem;font-size:.6rem}
.q-text{font-size:.85rem;font-weight:500;color:var(--text);margin-bottom:.55rem;line-height:1.5}
 
/* Radio choices */
.choices{display:flex;flex-wrap:wrap;gap:.4rem}
.ch{
  padding:.35rem .75rem;background:var(--bg);border:1px solid var(--border2);
  border-radius:4px;font-family:var(--mono);font-size:.75rem;color:var(--text3);
  cursor:pointer;transition:all .15s;user-select:none
}
.ch:hover{border-color:var(--accent);color:var(--text)}
.ch.sel{background:rgba(59,130,246,.12);border-color:var(--accent);color:var(--accent);font-weight:500}
 
/* Checkbox grid */
.chk-grid{display:flex;flex-wrap:wrap;gap:.35rem}
.chk{
  padding:.28rem .6rem;background:var(--bg);border:1px solid var(--border2);
  border-radius:3px;font-family:var(--mono);font-size:.72rem;color:var(--text3);
  cursor:pointer;transition:all .15s;user-select:none
}
.chk:hover{border-color:var(--accent2);color:var(--text)}
.chk.on{background:rgba(245,158,11,.1);border-color:var(--accent2);color:var(--accent2)}
 
/* Filter rows (A/B/F/S por gas) */
.filter-rows{display:flex;flex-direction:column;gap:.4rem}
.filter-row{display:flex;align-items:center;gap:.75rem}
.filter-lbl{font-family:var(--mono);font-size:.7rem;color:var(--text3);width:72px;flex-shrink:0}
 
/* Submit panel */
.submit-panel{
  background:var(--s1);border:1px solid var(--border);border-radius:8px;
  padding:1.5rem;margin-top:1.5rem
}
.submit-panel h2{font-size:1rem;font-weight:700;color:#fff;margin-bottom:.3rem}
.submit-panel p{font-size:.78rem;color:var(--text3);font-family:var(--mono);margin-bottom:1.1rem;line-height:1.6}
.submit-actions{display:flex;gap:.75rem;flex-wrap:wrap}
.submit-actions .btn{width:auto;padding:.65rem 1.4rem}
 
/* ═══════════════════════════════════════
   USER PROFILE MODAL
═══════════════════════════════════════ */
.modal-overlay{
  position:fixed;inset:0;background:rgba(0,0,0,.7);z-index:200;
  display:flex;align-items:center;justify-content:center;padding:1rem;
  opacity:0;pointer-events:none;transition:opacity .25s
}
.modal-overlay.open{opacity:1;pointer-events:all}
.modal{
  background:var(--s1);border:1px solid var(--border2);border-radius:10px;
  width:100%;max-width:400px;overflow:hidden;
  transform:scale(.95) translateY(16px);transition:transform .25s
}
.modal-overlay.open .modal{transform:scale(1) translateY(0)}
.modal-head{padding:1.1rem 1.25rem;background:var(--s2);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between}
.modal-head h3{font-size:.95rem;font-weight:600;color:#fff}
.modal-close{background:transparent;border:none;color:var(--text3);cursor:pointer;font-size:1.2rem;padding:.2rem;transition:color .15s;line-height:1}
.modal-close:hover{color:var(--red)}
.modal-body{padding:1.25rem}
.profile-info{display:flex;align-items:center;gap:1rem;padding:.75rem;background:var(--bg);border:1px solid var(--border);border-radius:6px;margin-bottom:1.1rem}
.profile-avatar{
  width:44px;height:44px;background:var(--accent);border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-size:1.1rem;font-weight:700;color:#fff;flex-shrink:0
}
.profile-name{font-weight:600;font-size:.9rem;color:#fff}
.profile-role{font-family:var(--mono);font-size:.68rem;color:var(--accent);background:rgba(59,130,246,.1);border:1px solid rgba(59,130,246,.2);border-radius:3px;padding:.1rem .4rem;display:inline-block;margin-top:.2rem}
 
.modal-sep{height:1px;background:var(--border);margin:1rem 0}
.modal-actions{display:flex;flex-direction:column;gap:.5rem}
.btn-sm{padding:.55rem 1rem;font-size:.8rem;width:100%}
 
/* ═══════════════════════════════════════
   TOAST
═══════════════════════════════════════ */
.toast{
  position:fixed;bottom:1.5rem;right:1.5rem;z-index:300;
  background:var(--s2);border:1px solid var(--border2);border-radius:6px;
  padding:.75rem 1.1rem;font-family:var(--mono);font-size:.78rem;
  display:flex;align-items:center;gap:.6rem;max-width:300px;
  transform:translateY(70px) scale(.95);opacity:0;transition:all .3s;
  box-shadow:0 8px 24px rgba(0,0,0,.5)
}
.toast.show{transform:translateY(0) scale(1);opacity:1}
.toast-dot{width:6px;height:6px;border-radius:50%;flex-shrink:0}
.toast.ok .toast-dot{background:var(--green);box-shadow:0 0 8px var(--green)}
.toast.err .toast-dot{background:var(--red);box-shadow:0 0 8px var(--red)}
.toast.info .toast-dot{background:var(--accent);box-shadow:0 0 8px var(--accent)}
 
/* ═══════════════════════════════════════
   LOADING
═══════════════════════════════════════ */
.loader{
  position:fixed;inset:0;background:rgba(10,12,16,.85);z-index:400;
  display:flex;align-items:center;justify-content:center;
  opacity:0;pointer-events:none;transition:opacity .2s
}
.loader.show{opacity:1;pointer-events:all}
.spin{width:36px;height:36px;border:2px solid var(--border2);border-top-color:var(--accent);border-radius:50%;animation:spin .7s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}