/* Landware Engineering Tools — shared theme.
   Palette and components match frontend/public/home.html (light theme,
   slate chrome, green accent, white rounded cards, pill buttons, Inter). */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root{
  --slate:#1f2733;
  --ink:#28323d;
  --mute:#67737f;
  --faint:#9aa6b2;
  --green:#3f9d6b;
  --green-dk:#276b47;
  --green-soft:#eaf4ee;
  --paper:#f5f6f7;
  --card:#ffffff;
  --line:#e3e7eb;
  --line-2:#eef1f3;
  --warn:#8f5600;
  --warn-soft:#fdf3e3;
  --fail:#a63c25;
  --fail-soft:#faece8;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'Inter',-apple-system,sans-serif;
  background:var(--paper);color:var(--ink);line-height:1.5;
  -webkit-font-smoothing:antialiased;
}

.bg{position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.6;
  background-image:linear-gradient(var(--line-2) 1px,transparent 1px),
                   linear-gradient(90deg,var(--line-2) 1px,transparent 1px);
  background-size:46px 46px;
  mask-image:radial-gradient(ellipse 70% 60% at 70% 25%,#000,transparent 80%);
  -webkit-mask-image:radial-gradient(ellipse 70% 60% at 70% 25%,#000,transparent 80%);}

.wrap{position:relative;z-index:1;max-width:1080px;margin:0 auto;padding:0 28px}

/* ---- nav ---- */
nav{display:flex;align-items:center;justify-content:space-between;padding:22px 0}
.logo{display:flex;align-items:center;gap:11px;text-decoration:none}
.logo .mark{width:auto;height:30px;flex:0 0 auto;object-fit:contain}
.logo .word{font-size:21px;font-weight:600;letter-spacing:-.01em;color:var(--ink)}
.navlinks{display:flex;gap:28px;align-items:center;font-size:14.5px;color:var(--mute)}
.navlinks a{color:inherit;text-decoration:none;transition:color .18s}
.navlinks a:hover{color:var(--ink)}

.beta-chip{display:inline-flex;align-items:center;font-size:11px;font-weight:700;
  color:var(--green-dk);background:var(--green-soft);
  border:1px solid rgba(63,157,107,.25);padding:2px 9px;border-radius:999px;
  vertical-align:middle}

/* ---- buttons ---- */
.btn-ghost{font-family:inherit;font-size:14px;font-weight:500;
  padding:8px 17px;border:1px solid var(--line);border-radius:999px;
  background:var(--card);color:var(--ink);cursor:pointer;transition:all .18s;
  text-decoration:none;display:inline-flex;align-items:center;gap:8px}
.btn-ghost:hover{border-color:var(--mute)}
.btn-solid{font-family:inherit;font-size:15px;font-weight:600;
  padding:13px 26px;border:none;border-radius:999px;cursor:pointer;
  background:var(--green);color:#fff;transition:all .2s;
  box-shadow:0 4px 14px rgba(63,157,107,.28);
  display:inline-flex;align-items:center;gap:8px;text-decoration:none}
.btn-solid:hover{background:var(--green-dk);transform:translateY(-1px);box-shadow:0 8px 20px rgba(63,157,107,.32)}
/* Disabled: there is no result to act on. Must read as unavailable, not as a
   button that silently does nothing. */
.btn-solid:disabled,.btn-solid:disabled:hover{background:var(--faint);color:#fff;
  box-shadow:none;transform:none;cursor:not-allowed}

/* ---- page header ---- */
header.tool-head{padding:34px 0 26px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:600;letter-spacing:.04em;color:var(--green-dk);
  background:var(--green-soft);padding:6px 14px;border-radius:999px;margin-bottom:18px}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--green);animation:pulse 2.4s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}
h1.tool-title{font-size:clamp(26px,4vw,38px);font-weight:700;line-height:1.1;letter-spacing:-.02em;margin-bottom:12px}
.tool-lede{font-size:15.5px;color:var(--mute);max-width:72ch;line-height:1.6}

/* ---- layout ---- */
.tool-grid{display:grid;grid-template-columns:minmax(330px,5fr) minmax(330px,4fr);gap:22px;align-items:start;margin-bottom:26px}
/* Grid items default to min-width:auto, so a wide child (the duration-sweep
   table) sets the column's min-content width and pushes the whole page wider
   instead of scrolling inside its own .tbl-scroll box. */
.tool-grid > *{min-width:0}
.tool-grid .col-sticky{position:sticky;top:16px}
@media(max-width:860px){.tool-grid{grid-template-columns:1fr}.tool-grid .col-sticky{position:static}}

details.card summary{font-size:14px;font-weight:700;cursor:pointer;color:var(--ink)}
details.card summary:hover{color:var(--green-dk)}
details.card[open] summary{margin-bottom:12px}

.card{background:var(--card);border:1px solid var(--line);border-radius:18px;
  padding:24px 26px;box-shadow:0 8px 26px rgba(40,50,61,.06)}
.card h2{font-size:16px;font-weight:700;letter-spacing:-.01em;margin-bottom:16px;
  display:flex;align-items:center;gap:9px}
.card h2 .n{display:inline-flex;align-items:center;justify-content:center;width:22px;height:22px;
  border-radius:50%;background:var(--green-soft);color:var(--green-dk);font-size:12px;font-weight:700}
.card + .card{margin-top:22px}

/* ---- forms ---- */
.field{margin-bottom:15px}
.field:last-child{margin-bottom:0}
label{display:block;font-size:12px;font-weight:600;letter-spacing:.03em;color:var(--mute);margin-bottom:6px}
label .unit{font-weight:500;color:var(--faint);letter-spacing:0}
input[type=number],input[type=text],select,textarea{
  width:100%;padding:10px 13px;border:1px solid var(--line);border-radius:11px;
  font-family:inherit;font-size:14.5px;background:#fff;color:var(--ink);transition:border-color .18s}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--green);box-shadow:0 0 0 3px rgba(63,157,107,.14)}
/* paste boxes (e.g. a HIRDS depth-duration table pasted from the browser) */
textarea{min-height:74px;resize:vertical;font-size:13px;line-height:1.45;
  font-variant-numeric:tabular-nums}
input[readonly]{background:var(--paper);color:var(--mute)}
.row{display:flex;gap:12px}
.row .field{flex:1;min-width:0}
.hint{font-size:12px;color:var(--mute);margin-top:5px;line-height:1.5}
.hint a{color:var(--green-dk)}
fieldset{border:none;margin:0;padding:0}

.seg{display:flex;border:1px solid var(--line);border-radius:11px;overflow:hidden}
.seg button{flex:1;font-family:inherit;font-size:13px;font-weight:600;padding:9px 6px;border:none;
  background:#fff;color:var(--mute);cursor:pointer;transition:all .15s}
.seg button + button{border-left:1px solid var(--line)}
.seg button.on{background:var(--green-soft);color:var(--green-dk)}

/* ---- results ---- */
.results .placeholder{color:var(--faint);font-size:14px;padding:18px 0;text-align:center}
table.res{width:100%;border-collapse:collapse;font-size:14px}
table.res th{font-size:11.5px;font-weight:600;color:var(--mute);
  text-align:left;padding:7px 10px;border-bottom:1px solid var(--line)}
table.res td{padding:8px 10px;border-bottom:1px solid var(--line-2);vertical-align:top}
table.res tr:last-child td{border-bottom:none}
table.res td.k{color:var(--mute);width:52%}
table.res td.v{font-weight:600;text-align:left;font-variant-numeric:tabular-nums}
table.res td.v .u{font-weight:500;color:var(--faint);margin-left:4px}
/* wide detail tables (e.g. the storm-duration sweep) scroll rather than
   forcing the sticky result column wider */
.tbl-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}
.tbl-scroll table.res{min-width:440px}
.res-hero{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:16px}
.res-hero .stat{flex:1;min-width:130px;background:var(--green-soft);border:1px solid rgba(63,157,107,.2);
  border-radius:13px;padding:13px 16px}
.res-hero .stat .lbl{font-size:11.5px;font-weight:600;color:var(--green-dk)}
.res-hero .stat .val{font-size:23px;font-weight:700;letter-spacing:-.02em;margin-top:2px;font-variant-numeric:tabular-nums}
.res-hero .stat .val .u{font-size:13px;font-weight:500;color:var(--mute);margin-left:4px}
.res-hero .stat.warn{background:var(--warn-soft);border-color:rgba(184,110,0,.25)}
.res-hero .stat.warn .lbl{color:var(--warn)}
.res-hero .stat.fail{background:var(--fail-soft);border-color:rgba(192,73,47,.25)}
.res-hero .stat.fail .lbl{color:var(--fail)}
.res-hero .stat.plain{background:var(--paper);border-color:var(--line)}
.res-hero .stat.plain .lbl{color:var(--mute)}

/* dynamic diagrams (trench cross-section, pavement build-up, pipe flow, ...) */
#xsection svg,#diagram svg{display:block;width:100%;height:auto}
svg .dim{font-size:10px;fill:var(--mute);font-family:'Inter',sans-serif}
svg .dimline{stroke:var(--mute);stroke-width:1;marker-end:none}
svg .lbl{font-size:10.5px;font-weight:600;fill:var(--ink);font-family:'Inter',sans-serif}

.badge{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;
  padding:3px 11px;border-radius:999px}
.badge.ok{background:var(--green-soft);color:var(--green-dk)}
.badge.warn{background:var(--warn-soft);color:var(--warn)}
.badge.fail{background:var(--fail-soft);color:var(--fail)}

.callout{border-radius:13px;padding:12px 15px;font-size:13.5px;line-height:1.55;margin-top:14px}
.callout.ok{background:var(--green-soft);color:var(--green-dk)}
.callout.warn{background:var(--warn-soft);color:var(--warn)}
.callout.fail{background:var(--fail-soft);color:var(--fail)}

/* ---- dynamic row tables (e.g. catchment surfaces, scala readings) ---- */
table.rows{width:100%;border-collapse:collapse;font-size:13.5px}
table.rows th{font-size:11px;font-weight:600;color:var(--mute);
  text-align:left;padding:4px 6px 7px}
table.rows td{padding:3px 4px;vertical-align:middle}
table.rows input,table.rows select{padding:8px 10px;font-size:13.5px;border-radius:9px}
table.rows td.calc{font-weight:600;text-align:right;white-space:nowrap;color:var(--ink);
  font-variant-numeric:tabular-nums;padding-right:8px}
.row-x{background:none;border:none;color:var(--faint);font-size:17px;cursor:pointer;
  padding:4px 7px;line-height:1;border-radius:7px}
.row-x:hover{color:var(--fail);background:var(--fail-soft)}
.add-row{margin-top:10px;font-family:inherit;font-size:13px;font-weight:600;color:var(--green-dk);
  background:var(--green-soft);border:none;border-radius:999px;padding:7px 16px;cursor:pointer}
.add-row:hover{background:#dcece2}

/* ---- references / notes ---- */
.refs{font-size:12.5px;color:var(--mute);line-height:1.65}
.refs h3{font-size:12px;font-weight:700;
  color:var(--mute);margin-bottom:8px}
.refs ul{padding-left:18px}
.refs li{margin-bottom:4px}

.disclaimer{font-size:12px;color:var(--faint);line-height:1.6;border-top:1px solid var(--line);
  margin-top:30px;padding:20px 0 36px}
.disclaimer strong{color:var(--mute)}

/* ---- index page tool cards ---- */
.tools-intro{text-align:center;padding:44px 0 8px}
.tools-intro h1{font-size:clamp(30px,4.6vw,46px);font-weight:700;letter-spacing:-.025em;line-height:1.08;
  max-width:20ch;margin:0 auto 16px}
.tools-intro h1 .g{color:var(--green-dk)}
.tools-intro p{font-size:16px;color:var(--mute);max-width:56ch;margin:0 auto 10px}
.tool-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:18px;margin:18px 0 10px}
.cat-head{font-size:13px;font-weight:700;
  color:var(--green-dk);margin:34px 0 0;padding-bottom:8px;border-bottom:1px solid var(--line)}
.cat-head:first-of-type{margin-top:26px}
a.tool-card{display:block;background:var(--card);border:1px solid var(--line);border-radius:18px;
  padding:22px 24px;text-decoration:none;color:var(--ink);transition:all .18s;
  box-shadow:0 6px 20px rgba(40,50,61,.05)}
a.tool-card:hover{transform:translateY(-2px);box-shadow:0 14px 34px rgba(40,50,61,.10);border-color:#cdd6cf}
.tool-card .ico{width:42px;height:42px;border-radius:12px;background:var(--green-soft);
  display:flex;align-items:center;justify-content:center;margin-bottom:14px}
.tool-card .ico svg{width:22px;height:22px;stroke:var(--green-dk);fill:none;stroke-width:1.8;
  stroke-linecap:round;stroke-linejoin:round}
.tool-card h3{font-size:16px;font-weight:700;letter-spacing:-.01em;margin-bottom:6px}
.tool-card p{font-size:13.5px;color:var(--mute);line-height:1.55}
.tool-card .std{display:inline-block;margin-top:12px;font-size:11.5px;font-weight:600;color:var(--faint);
  letter-spacing:.02em}

footer.tools-foot{padding:40px 0;margin-top:26px;border-top:1px solid var(--line);
  color:var(--mute);font-size:13px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}
footer.tools-foot a{color:var(--green-dk);text-decoration:none}

@media(max-width:720px){
  .navlinks a.navhome{display:none}
  .wrap{padding:0 20px}
  .row{flex-direction:column;gap:0}
}

/* ============================================================
   PRINT / PDF REPORT
   The on-screen UI is hidden; #pdfReport (built by tools.js) is
   shown and styled as an A4 Landware-branded calculation sheet.
   ============================================================ */
#pdfReport{display:none}

@media print{
  @page{size:A4;margin:16mm 15mm 18mm}
  body{background:#fff;-webkit-print-color-adjust:exact;print-color-adjust:exact}
  .bg,.wrap,nav.screen-only{display:none !important}
  #pdfReport{display:block;font-family:'Inter',-apple-system,sans-serif;color:var(--ink)}

  .pr-head{display:flex;align-items:center;justify-content:space-between;
    border-bottom:2.5px solid var(--green);padding-bottom:10px;margin-bottom:6px}
  .pr-head .logo{display:flex;align-items:center;gap:9px}
  .pr-head .logo img{height:26px;width:auto}
  .pr-head .logo span{font-size:17px;font-weight:600;letter-spacing:-.01em}
  .pr-head .doc{text-align:right;font-size:10.5px;color:var(--mute);line-height:1.5}
  .pr-head .doc b{display:block;font-size:12px;color:var(--ink)}

  .pr-title{font-size:19px;font-weight:700;letter-spacing:-.015em;margin:12px 0 2px}
  .pr-sub{font-size:11px;color:var(--mute);margin-bottom:14px}

  /* Slim project-details strip — metadata only; the calculation is the
     focus of the sheet. */
  .pr-meta{display:grid;grid-template-columns:repeat(4,1fr);gap:0;
    border-top:1px solid var(--line-2);border-bottom:1px solid var(--line-2);
    margin-bottom:12px}
  .pr-meta div{padding:3px 8px 3px 0;font-size:8.5px;color:var(--faint)}
  .pr-meta b{font-size:9.5px;color:var(--mute);font-weight:600;margin-left:4px}

  .pr-section{margin-bottom:14px;page-break-inside:avoid}
  .pr-section h3{font-size:11px;font-weight:700;
    color:var(--green-dk);border-bottom:1px solid var(--line);padding-bottom:4px;margin-bottom:7px}
  table.pr-table{width:100%;border-collapse:collapse;font-size:10.5px}
  table.pr-table th{text-align:left;font-size:9.5px;font-weight:600;
    color:var(--mute);padding:4px 8px;border-bottom:1px solid var(--line)}
  table.pr-table td{padding:4.5px 8px;border-bottom:1px solid var(--line-2);vertical-align:top}
  table.pr-table td.k{color:var(--mute);width:48%}
  table.pr-table td.v{font-weight:600;text-align:left;font-variant-numeric:tabular-nums}
  table.pr-table td.v .u{font-weight:400;color:var(--mute);margin-left:3px}
  table.pr-table tr.hero td{background:var(--green-soft);font-weight:700}

  .pr-badge{display:inline-block;font-size:9.5px;font-weight:700;padding:1.5px 8px;border-radius:99px}
  .pr-badge.ok{background:var(--green-soft);color:var(--green-dk)}
  .pr-badge.warn{background:var(--warn-soft);color:var(--warn)}
  .pr-badge.fail{background:var(--fail-soft);color:var(--fail)}

  .pr-notes{font-size:9.5px;color:var(--mute);line-height:1.55}
  .pr-notes ul{padding-left:14px}
  .pr-notes li{margin-bottom:2.5px}

  /* Printed when the page has no current result — see ui.js pdfOnPrint. */
  .pr-empty{font-size:11px;color:var(--mute);padding:6px 0}

  .pr-disclaimer{margin-top:16px;border-top:1px solid var(--line);padding-top:8px;
    font-size:8.5px;color:var(--faint);line-height:1.5}
  .pr-foot{margin-top:8px;font-size:8.5px;color:var(--faint);display:flex;justify-content:space-between}
}