:root{
  --bg:#f6f7fb;
  --card:#ffffff;
  --text:#0f172a;
  --muted:#64748b;
  --border:#e2e8f0;
  --shadow:0 10px 30px rgba(15,23,42,.08);
  --radius:16px;
  --radius-sm:12px;
  --focus:0 0 0 3px rgba(59,130,246,.25);
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Apple Color Emoji","Segoe UI Emoji";
  background:var(--bg);
  color:var(--text);
}

.app{
  max-width:1180px;
  margin:28px auto;
  padding:16px;
  display:grid;
  grid-template-columns:220px minmax(0,1fr) 340px;
  grid-template-areas:
    "header header header"
    "flash  flash  flash"
    "nav    main   aside";
  gap:16px;
  align-items:start;
}

.header{grid-area:header}
.flash{grid-area:flash}
.nav{grid-area:nav; display:flex; flex-direction:column; gap:10px}
.main{grid-area:main}
.aside{grid-area:aside; display:flex; flex-direction:column; gap:16px}

.brand{display:flex;flex-direction:column;gap:4px;padding:6px 2px}
.brand__title{font-size:22px;font-weight:750;letter-spacing:-.02em}
.brand__sub{font-size:13px;color:var(--muted)}
.flash__hint{color:var(--muted);font-size:13px;padding:4px 2px}

.card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  padding:18px;
}
.card--tight{padding:14px}
.card__title{font-weight:750;letter-spacing:-.01em;margin-bottom:12px}

.alert{
  border-radius:var(--radius);
  padding:14px 16px;
  border:1px solid var(--border);
  background:rgba(255,255,255,.7);
  backdrop-filter:blur(6px);
}
.alert__title{font-weight:750;margin-bottom:6px}
.alert__text{color:var(--muted);font-size:13px}
.alert__list{margin:8px 0 0 18px}
.alert--error{border-color:#fecaca;background:#fff1f2}
.alert--success{border-color:#bbf7d0;background:#f0fdf4}

.form{display:flex;flex-direction:column;gap:14px}
.field{display:flex;flex-direction:column;gap:6px}
.label{font-weight:700;font-size:13px}
.help{font-size:12px;color:var(--muted)}
.input{
  width:100%;
  height:44px;
  padding:10px 12px;
  border:1px solid var(--border);
  border-radius:var(--radius-sm);
  outline:none;
  background:#fff;
}
.input:focus{box-shadow:var(--focus);border-color:#93c5fd}

.meta{font-size:12px;color:var(--muted);min-height:16px}
.field--suggest{position:relative}

.suggest{
  position:absolute;
  top:78px;
  left:0;
  right:0;
  border:1px solid var(--border);
  border-radius:var(--radius-sm);
  background:#fff;
  box-shadow:0 18px 40px rgba(15,23,42,.12);
  overflow:hidden;
  z-index:10;
}
.suggest__item{
  padding:10px 12px;
  cursor:pointer;
  border-top:1px solid var(--border);
}
.suggest__item:first-child{border-top:0}
.suggest__item:hover{background:#f8fafc}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:44px;
  padding:0 14px;
  border-radius:12px;
  border:1px solid var(--border);
  text-decoration:none;
  font-weight:750;
  font-size:13px;
  color:var(--text);
  background:#fff;
  cursor:pointer;
}
.btn:focus{outline:none;box-shadow:var(--focus)}
.btn--block{width:100%}
.btn--active{border: 3px solid #b5644f;}
.btn--primary{background:#0f172a;color:#fff;border-color:#0f172a}
.btn--primary:hover{filter:brightness(1.05)}
.btn--ghost:hover{background:#f8fafc}

.formActions{
  display:flex;
  gap:10px;
  align-items:center;
}

.chips{display:flex;flex-direction:column;gap:10px}
.chip{
  width:100%;
  text-align:left;
  border:1px solid var(--border);
  background:#fff;
  border-radius:14px;
  padding:10px 12px;
  cursor:pointer;
  display:flex;
  flex-direction:column;
  gap:4px;
}
.chip:hover{background:#f8fafc;border-color:#cbd5e1}
.chip__code{font-weight:800;letter-spacing:.02em}
.chip__label{font-size:12px;color:var(--muted)}

.pdf{
  width:100%;
  height:520px;
  border:1px solid var(--border);
  border-radius:14px;
  background:#fff;
}

.actions{display:flex;gap:10px;margin-top:12px}

@media (max-width: 980px){
  .app{
    grid-template-columns:1fr;
    grid-template-areas:
      "header"
      "flash"
      "main"
      "aside"
      "nav";
  }
  .nav{flex-direction:row;flex-wrap:wrap}
  .chips{flex-direction:row;flex-wrap:wrap}
  .chip{width:auto;flex-direction:row;align-items:center;gap:10px}
  .chip__label{white-space:nowrap}
  .pdf{height:420px}
  .formActions{flex-direction:column;align-items:stretch}
}