:root {
  --navy: #00255D;
  --navy-2: #0a3577;
  --blue: #3DADE2;
  --bg: #F3F6FA;
  --card: #FFFFFF;
  --line: #E1E7EF;
  --text: #1C2635;
  --muted: #66738A;
  --radius: 14px;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  font-family: Inter, system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.45;
}
.wrap { max-width: 1280px; margin: 0 auto; padding: 0 16px; }

/* topo */
.topbar {
  background: var(--navy);
  background-image: repeating-linear-gradient(-28deg, transparent 0 46px, rgba(61,173,226,.07) 46px 58px);
  color: #fff;
}
.topbar-in { display: flex; align-items: center; gap: 20px; padding: 18px 16px; }
.brand { height: 46px; width: auto; }
.topbar-title { border-left: 2px solid var(--blue); padding-left: 18px; display: flex; flex-direction: column; }
.topbar-title strong { font-size: 18px; letter-spacing: .2px; }
.topbar-title span { color: #A9C3E6; font-size: 13px; }

/* layout */
.layout { display: grid; grid-template-columns: minmax(340px, 440px) 1fr; gap: 24px; padding-top: 24px; padding-bottom: 48px; align-items: start; }
@media (max-width: 960px) { .layout { grid-template-columns: 1fr; } }

.panel, .preview-card, .howto {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 1px 2px rgba(0,37,93,.04), 0 8px 24px rgba(0,37,93,.05);
}
.panel { padding: 6px 20px 22px; }
.preview-col { display: flex; flex-direction: column; gap: 18px; position: sticky; top: 16px; min-width: 0; }
@media (max-width: 960px) { .preview-col { position: static; } }

/* abas */
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); margin: 0 -20px 18px; padding: 0 14px; }
.tab {
  background: none; border: 0; padding: 14px 12px 12px; font: inherit; font-weight: 600; color: var(--muted);
  cursor: pointer; border-bottom: 3px solid transparent; margin-bottom: -1px;
}
.tab:hover { color: var(--navy); }
.tab.active { color: var(--navy); border-bottom-color: var(--blue); }
.tabpane { display: none; }
.tabpane.active { display: block; }

/* formulários */
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 14px; }
.grid2 .full { grid-column: 1 / -1; }
label { display: flex; flex-direction: column; gap: 5px; font-size: 12.5px; font-weight: 600; color: #3B4556; }
input:not([type=checkbox]):not([type=radio]):not([type=color]), textarea {
  font: inherit; font-weight: 400; color: var(--text);
  border: 1px solid #CFD8E3; border-radius: 9px; padding: 9px 11px; background: #fff; width: 100%;
  transition: border-color .15s, box-shadow .15s;
}
input:focus, textarea:focus { outline: none; border-color: var(--blue); box-shadow: 0 0 0 3px rgba(61,173,226,.2); }
textarea { resize: vertical; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12.5px; }
label.check { flex-direction: row; align-items: center; gap: 8px; align-self: end; padding-bottom: 10px; font-weight: 500; }
label.check input { accent-color: var(--navy); width: 16px; height: 16px; }
h4 { margin: 22px 0 10px; font-size: 13px; text-transform: uppercase; letter-spacing: .6px; color: var(--navy); }
h4 small { text-transform: none; letter-spacing: 0; color: var(--muted); font-weight: 400; }
.hint { color: var(--muted); font-size: 12.5px; margin: 0 0 12px; }
code { background: #EEF3F9; border-radius: 5px; padding: 1px 5px; font-size: 12px; color: var(--navy); }

.upload { display: flex; align-items: center; gap: 8px; font-size: 12.5px; font-weight: 600; color: #3B4556; }
.upload span { flex: 1; }

.modelos { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.modelo { cursor: pointer; }
.modelo input { position: absolute; opacity: 0; }
.modelo span { display: block; border: 1.5px solid var(--line); border-radius: 10px; padding: 10px 12px; font-weight: 600; color: var(--navy); }
.modelo small { display: block; font-weight: 400; color: var(--muted); }
.modelo input:checked + span { border-color: var(--blue); background: #F0F8FD; box-shadow: 0 0 0 3px rgba(61,173,226,.15); }
.cores { display: flex; gap: 14px; flex-wrap: wrap; }
.cores label { align-items: center; }
.cores input { width: 44px; height: 32px; border: 1px solid #CFD8E3; border-radius: 8px; padding: 2px; background: #fff; cursor: pointer; }

/* botões */
.row { display: flex; gap: 8px; flex-wrap: wrap; margin: 12px 0; }
.btn {
  font: inherit; font-weight: 600; font-size: 13px; cursor: pointer;
  background: var(--navy); color: #fff; border: 1px solid var(--navy); border-radius: 9px; padding: 9px 14px;
  display: inline-flex; align-items: center; gap: 6px; transition: background .15s, transform .05s;
}
.btn:hover { background: var(--navy-2); }
.btn:active { transform: translateY(1px); }
.btn.ghost { background: #fff; color: var(--navy); border-color: #CFD8E3; }
.btn.ghost:hover { border-color: var(--navy); background: #F7FAFD; }
.btn.small { padding: 5px 10px; font-size: 12px; }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn.file { flex-direction: row; }

/* preview */
.preview-card { padding: 0; overflow: hidden; }
.preview-head { display: flex; justify-content: space-between; align-items: center; padding: 12px 18px; border-bottom: 1px solid var(--line); font-weight: 600; color: var(--navy); }
.seg { display: inline-flex; background: #EEF3F9; border-radius: 8px; padding: 3px; }
.seg button { border: 0; background: none; font: inherit; font-size: 12px; font-weight: 600; padding: 4px 10px; border-radius: 6px; color: var(--muted); cursor: pointer; }
.seg button.active { background: #fff; color: var(--navy); box-shadow: 0 1px 2px rgba(0,0,0,.08); }
.mail { padding: 22px 26px 28px; background: #fff; overflow-x: auto; transition: background .2s; }
.mail.dark { background: #1F1F1F; color: #E6E6E6; }
.mail-meta { font-size: 12.5px; color: var(--muted); border-bottom: 1px dashed var(--line); padding-bottom: 12px; margin-bottom: 14px; }
.mail.dark .mail-meta { border-color: #3a3a3a; color: #999; }
.mail-body { font-family: Arial, sans-serif; font-size: 14px; color: #333; margin: 0 0 18px; }
.mail.dark .mail-body { color: #ddd; }
.alert { margin: 0 18px 14px; background: #FFF7E6; border: 1px solid #F3D9A4; color: #7A5300; border-radius: 9px; padding: 10px 12px; font-size: 12.5px; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; padding: 14px 18px 18px; border-top: 1px solid var(--line); background: #FAFCFE; }

/* lote */
.lote-lista { display: flex; flex-direction: column; gap: 8px; margin-top: 6px; }
.lote-item { display: flex; align-items: center; gap: 10px; border: 1px solid var(--line); border-radius: 10px; padding: 9px 12px; cursor: pointer; }
.lote-item:hover { border-color: var(--blue); }
.lote-item.sel { border-color: var(--blue); background: #F0F8FD; }
.lote-item .who { flex: 1; min-width: 0; }
.lote-item .who b { display: block; color: var(--navy); }
.lote-item .who span { color: var(--muted); font-size: 12px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; display: block; }

/* howto */
.howto { padding: 4px 20px; }
.howto summary { cursor: pointer; font-weight: 600; color: var(--navy); padding: 12px 0; }
.howto-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 6px 22px; padding-bottom: 14px; }
.howto h5 { margin: 6px 0 4px; font-size: 13px; color: var(--navy); }
.howto ol { margin: 0; padding-left: 18px; color: #3B4556; font-size: 13px; }
.howto li { margin: 3px 0; }

.toast {
  position: fixed; left: 50%; bottom: 24px; transform: translate(-50%, 20px); opacity: 0;
  background: var(--navy); color: #fff; padding: 10px 16px; border-radius: 10px; font-weight: 600;
  box-shadow: 0 8px 24px rgba(0,37,93,.3); transition: all .25s; pointer-events: none; z-index: 10;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

@media (max-width: 520px) {
  .grid2 { grid-template-columns: 1fr; }
  .topbar-title span { display: none; }
  .mail { padding: 16px; }
}