:root {
  color-scheme: light;
  font-family: Inter, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  color: #17202f;
  background: #f4f6f8;
  font-size: 15px;
  letter-spacing: 0;
  --ink: #17202f;
  --muted: #657184;
  --line: #dce3e8;
  --soft: #eef5f2;
  --green: #0c695e;
  --green-dark: #084a43;
  --nav: #0b253d;
  --warning: #9a5b05;
  --danger: #a53737;
}

[hidden] { display: none !important; }

* { box-sizing: border-box; }
body { margin: 0; min-width: 1080px; }
button, input, select { font: inherit; letter-spacing: 0; }
button, select, input { border: 1px solid var(--line); border-radius: 6px; background: white; color: var(--ink); }
button { min-height: 38px; padding: 0 14px; cursor: pointer; font-weight: 650; }
button:hover { border-color: #8ca69f; }
button.primary { background: var(--green); color: white; border-color: var(--green); }
button.primary:hover { background: var(--green-dark); }
button.danger-button { color: var(--danger); border-color: #d9aaaa; background: #fff7f7; }
button.danger-button:hover { background: #ffecec; border-color: var(--danger); }
button.table-action { min-height: 30px; margin-top: 6px; padding: 0 9px; color: var(--green-dark); font-size: 12px; }
input, select { min-height: 40px; padding: 8px 10px; width: 100%; }
textarea { width: 100%; resize: vertical; border: 1px solid var(--line); border-radius: 6px; padding: 10px; color: var(--ink); font: inherit; }
label > span { display: block; color: var(--muted); font-size: 13px; margin-bottom: 6px; }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 8px; font-size: 28px; }
h2 { margin-bottom: 5px; font-size: 20px; }
h3 { margin-bottom: 5px; font-size: 16px; }
p { color: var(--muted); line-height: 1.55; }

.app-shell { min-height: 100vh; display: grid; grid-template-columns: 230px minmax(0, 1fr); }
.side-nav { background: var(--nav); color: white; padding: 24px 18px; position: sticky; top: 0; height: 100vh; }
.brand { display: flex; align-items: center; gap: 12px; padding: 0 8px 26px; }
.brand-mark { width: 44px; height: 44px; display: grid; place-items: center; border: 1px solid #7fa99f; background: #f7faf8; color: var(--green-dark); font-weight: 800; border-radius: 6px; }
.brand span { display: block; color: #b7c8d8; font-size: 12px; margin-top: 3px; }
.side-nav nav { display: grid; gap: 6px; }
.side-nav nav a, .side-nav nav span { color: #dbe6ef; text-decoration: none; padding: 12px 14px; border-radius: 6px; }
.side-nav nav .active { color: white; background: #27425e; }
.side-nav small { float: right; color: #8aa1b5; }
.scope-note { position: absolute; bottom: 24px; left: 26px; right: 26px; color: #9eb1c2; font-size: 12px; }

main { padding: 30px 34px 48px; min-width: 0; }
.page-header { display: flex; justify-content: space-between; gap: 28px; align-items: flex-start; margin-bottom: 24px; }
.page-header p { margin-bottom: 0; }
.eyebrow { color: var(--green); font-size: 12px; font-weight: 800; text-transform: uppercase; margin-bottom: 5px; }
.header-status { display: flex; align-items: center; gap: 10px; }
.header-status span, .status-badge { background: var(--soft); border: 1px solid #cfe1db; color: var(--green-dark); border-radius: 999px; padding: 8px 11px; font-size: 12px; font-weight: 700; white-space: nowrap; }

.toolbar { display: grid; grid-template-columns: minmax(240px, 1fr) 190px 170px auto; align-items: end; gap: 12px; background: white; border: 1px solid var(--line); padding: 16px; margin-bottom: 14px; }
.toolbar-actions, .section-actions { display: flex; gap: 8px; align-items: center; }
.message { border-left: 4px solid var(--green); background: #eaf5f1; color: var(--green-dark); padding: 11px 14px; margin-bottom: 14px; }
.message.error { border-color: var(--danger); background: #fff1f1; color: var(--danger); }

.workspace { display: grid; grid-template-columns: minmax(330px, 0.8fr) minmax(620px, 1.6fr); gap: 14px; align-items: start; }
.material-pane, .detail-pane { background: white; border: 1px solid var(--line); min-height: 640px; }
.material-pane { padding: 18px; }
.detail-pane { padding: 22px; }
.section-heading, .detail-title { display: flex; justify-content: space-between; gap: 18px; align-items: flex-start; }
.section-heading p, .detail-title p { margin-bottom: 0; font-size: 13px; }
.material-list { display: grid; gap: 6px; margin-top: 14px; }
.material-row { width: 100%; text-align: left; min-height: 78px; padding: 12px; display: grid; gap: 6px; }
.material-row.active { border-color: var(--green); background: var(--soft); box-shadow: inset 3px 0 var(--green); }
.material-row strong { overflow-wrap: anywhere; }
.material-row .row-meta { display: flex; justify-content: space-between; color: var(--muted); font-size: 12px; gap: 10px; }
.material-row .price { color: var(--green-dark); font-weight: 800; }
.empty-state { min-height: 580px; display: grid; place-content: center; text-align: center; }
.empty-state p { max-width: 390px; }
.detail-section { border-top: 1px solid var(--line); padding-top: 18px; margin-top: 18px; }
.spec-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; margin-top: 12px; }
.spec-card { border: 1px solid var(--line); padding: 11px; min-height: 82px; }
.spec-card span { display: block; color: var(--muted); font-size: 12px; margin-top: 5px; }
.table-scroll { overflow-x: auto; margin-top: 12px; }
table { border-collapse: collapse; width: 100%; min-width: 790px; }
th, td { border-bottom: 1px solid var(--line); text-align: left; padding: 10px 8px; vertical-align: top; }
th { color: var(--muted); font-size: 12px; background: #f7f9fa; }
td { font-size: 13px; }
td strong, td span { display: block; }
.recommended-label { color: var(--green); font-size: 11px; font-weight: 800; margin-top: 3px; }
.linkage-panel { margin-top: 18px; display: grid; grid-template-columns: minmax(300px, 1fr) 170px 170px; align-items: end; gap: 16px; border: 1px solid #bdd8d0; background: var(--soft); padding: 16px; }
.linkage-panel p { margin-bottom: 0; }
.preview-total span { display: block; color: var(--muted); font-size: 12px; margin-bottom: 6px; }
.preview-total strong { font-size: 24px; color: var(--green-dark); }

dialog { width: min(760px, calc(100vw - 48px)); border: 1px solid var(--line); border-radius: 6px; padding: 0; box-shadow: 0 18px 60px #14273c33; }
dialog::backdrop { background: #0d213660; }
dialog form { padding: 22px; }
.login-dialog { width: min(440px, calc(100vw - 36px)); }
.login-dialog form { display: grid; gap: 16px; }
.login-dialog h2 { margin: 4px 0 -8px; }
.login-dialog p { margin-bottom: 0; }
.login-brand { display: flex; align-items: center; gap: 12px; border-bottom: 1px solid var(--line); padding-bottom: 16px; }
.login-brand > span { width: 44px; height: 44px; display: grid; place-items: center; background: var(--green-dark); color: white; border-radius: 6px; font-weight: 800; }
.login-brand strong, .login-brand small { display: block; }
.login-brand small { color: var(--muted); margin-top: 3px; }
.login-submit { width: 100%; min-height: 44px; }
.login-error { color: var(--danger); background: #fff1f1; padding: 10px 12px; }
.dialog-header { display: flex; justify-content: space-between; gap: 20px; align-items: flex-start; border-bottom: 1px solid var(--line); padding-bottom: 14px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; padding: 18px 0; }
.form-hint { margin: 12px 0 0; }
.full-field { display: block; padding: 18px 0; }
.checkbox-field { display: flex; align-items: center; gap: 8px; padding-top: 24px; }
.checkbox-field input { min-height: auto; width: 18px; height: 18px; }
.checkbox-field span { margin: 0; }
.dialog-actions { display: flex; justify-content: flex-end; gap: 10px; border-top: 1px solid var(--line); padding-top: 14px; }

@media (max-width: 1250px) {
  .workspace { grid-template-columns: 340px minmax(0, 1fr); }
  .spec-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}