/* CT Compressor Sales Tools — mobile-first */
:root {
  --blue: #0f4c81;
  --blue-dark: #0a3457;
  --accent: #f39c12;
  --bg: #f4f6f8;
  --card: #ffffff;
  --text: #1c2733;
  --muted: #64748b;
  --line: #dbe2ea;
  --ok: #1a7f4b;
  --err: #c0392b;
}
* { box-sizing: border-box; }
body { margin: 0; font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; background: var(--bg); color: var(--text); }

/* Top bar */
.topbar { background: var(--blue); color: #fff; }
.topbar-inner { max-width: 1100px; margin: 0 auto; padding: 10px 16px; display: flex; flex-wrap: wrap; align-items: center; gap: 8px 16px; }
.brand { color: #fff; text-decoration: none; font-weight: 700; font-size: 18px; }
.brand span { color: var(--accent); font-weight: 600; }
.nav { display: flex; flex-wrap: wrap; gap: 4px; margin-left: auto; }
.nav a { color: #dce8f5; text-decoration: none; padding: 6px 10px; border-radius: 6px; font-size: 14px; }
.nav a.on, .nav a:hover { background: var(--blue-dark); color: #fff; }

.wrap { max-width: 1100px; margin: 0 auto; padding: 16px; }
.wrap.bare { max-width: 420px; padding-top: 10vh; }

h1 { font-size: 22px; margin: 8px 0 16px; }
h2 { font-size: 17px; margin: 20px 0 10px; }

.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 16px; margin-bottom: 16px; }

.flash { padding: 10px 14px; border-radius: 8px; margin-bottom: 14px; background: #e8f6ee; color: var(--ok); border: 1px solid #bfe6cf; overflow-wrap: anywhere; }
.flash.err { background: #fdeceb; color: var(--err); border-color: #f5c6c2; }

/* Forms */
label { display: block; font-size: 13px; font-weight: 600; color: var(--muted); margin: 10px 0 4px; }
input[type=text], input[type=email], input[type=password], input[type=number], input[type=url], select, textarea {
  width: 100%; padding: 10px 12px; font-size: 16px; border: 1px solid var(--line); border-radius: 8px; background: #fff; color: var(--text);
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--blue); outline-offset: 0; border-color: var(--blue); }
.grid { display: grid; grid-template-columns: 1fr; gap: 0 16px; }
@media (min-width: 640px) { .grid.c2 { grid-template-columns: 1fr 1fr; } .grid.c3 { grid-template-columns: 1fr 1fr 1fr; } }
.check { display: flex; align-items: center; gap: 8px; margin: 12px 0; }
.check input { width: 18px; height: 18px; }
.check label { margin: 0; }

.btn { display: inline-block; background: var(--blue); color: #fff; border: 0; border-radius: 8px; padding: 11px 18px; font-size: 15px; font-weight: 600; cursor: pointer; text-decoration: none; margin-top: 12px; }
.btn:hover { background: var(--blue-dark); }
.btn.small { padding: 6px 10px; font-size: 13px; margin: 0; }
.btn.ghost { background: transparent; color: var(--blue); border: 1px solid var(--blue); }
.btn.danger { background: var(--err); }

/* Tables — horizontal scroll on phones */
.tablewrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
table { border-collapse: collapse; width: 100%; font-size: 14px; background: var(--card); }
th, td { padding: 9px 10px; border-bottom: 1px solid var(--line); text-align: left; white-space: nowrap; }
th { background: #eef2f6; font-size: 12px; text-transform: uppercase; letter-spacing: .03em; color: var(--muted); position: sticky; top: 0; }
tr.best { background: #e8f6ee; }
td.num, th.num { text-align: right; }

.muted { color: var(--muted); font-size: 13px; }
.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.badge.vsd { background: #e3edf7; color: var(--blue); }
.badge.fixed { background: #eee; color: #555; }
.badge.off { background: #fdeceb; color: var(--err); }

/* Dashboard tool cards */
.tools { display: grid; grid-template-columns: 1fr; gap: 14px; }
@media (min-width: 640px) { .tools { grid-template-columns: 1fr 1fr; } }
.tool { display: block; background: var(--card); border: 1px solid var(--line); border-left: 5px solid var(--blue); border-radius: 10px; padding: 18px; text-decoration: none; color: var(--text); }
.tool:hover { border-left-color: var(--accent); }
.tool h3 { margin: 0 0 6px; color: var(--blue); }
.tool p { margin: 0; font-size: 14px; color: var(--muted); }

.sheet-link { color: var(--blue); display: inline-block; vertical-align: -2px; margin-left: 4px; }
.sheet-link:hover { color: var(--accent); }

/* Checkbox dropdowns */
.msel { position: relative; }
.msel summary { list-style: none; cursor: pointer; padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px; background: #fff; font-size: 16px; user-select: none; }
.msel summary::-webkit-details-marker { display: none; }
.msel summary::after { content: " ▾"; color: var(--muted); }
.msel[open] summary { border-color: var(--blue); }
.msel-list { position: absolute; z-index: 30; left: 0; right: 0; margin-top: 4px; background: #fff; border: 1px solid var(--line); border-radius: 8px; box-shadow: 0 8px 20px rgba(0,0,0,.12); max-height: 260px; overflow-y: auto; padding: 6px; }
.msel-opt { display: flex; align-items: center; gap: 8px; padding: 7px 8px; margin: 0; font-size: 15px; font-weight: 400; color: var(--text); border-radius: 6px; cursor: pointer; }
.msel-opt:hover { background: var(--bg); }
.msel-opt input { width: 17px; height: 17px; }

/* Manufacturer preference chips */
.makers { display: flex; flex-wrap: wrap; gap: 8px; }
.maker { border: 1px solid var(--line); background: #fff; color: var(--text); border-radius: 999px; padding: 7px 14px; font-size: 14px; cursor: pointer; }
.maker:hover { border-color: var(--blue); }
.maker.pref { background: #fff7e8; border-color: var(--accent); color: #8a5a00; font-weight: 600; }
.star { color: var(--accent); }
tr.prefrow td { background: #fffaf0; }
tr.best td { background: #e8f6ee; }

.inline-form { display: inline; }
.actions { display: flex; gap: 6px; flex-wrap: wrap; }