:root {
  --blue: #0e6ba8; --teal: #17a2b8; --ink: #1c2733; --line: #d8e0e8;
  --bg: #f2f5f8; --card: #ffffff; --danger: #c0392b; --ok: #1e8e5a;
}
* { box-sizing: border-box; }
body { margin: 0; font: 15px/1.45 "Segoe UI", system-ui, sans-serif; color: var(--ink); background: var(--bg); }
h2, h3, h4 { margin: 0 0 .5em; }
.muted { color: #67788a; } .small { font-size: 12.5px; }
.err { color: var(--danger); }
hr { border: 0; border-top: 1px solid var(--line); margin: 16px 0; }

/* top bar */
.topbar { display: flex; align-items: center; gap: 18px; background: #fff; border-bottom: 2px solid var(--blue); padding: 8px 18px; position: sticky; top: 0; z-index: 5; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; color: var(--blue); }
.brand img { height: 34px; }
.tabs { display: flex; gap: 4px; }
.tab { border: 0; background: transparent; padding: 10px 16px; font: inherit; cursor: pointer; border-bottom: 3px solid transparent; color: #4a5a6a; }
.tab.active { color: var(--blue); border-color: var(--blue); font-weight: 600; }
.userbox { margin-left: auto; display: flex; align-items: center; gap: 10px; font-size: 13px; }

/* three-area layout */
.tabpane { display: none; padding: 16px; max-width: 1500px; margin: 0 auto; }
.tabpane.active { display: block; }
.area { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 16px 18px; }
.area-top { margin-bottom: 14px; }
.area-bottom { display: grid; grid-template-columns: minmax(360px, 44%) 1fr; gap: 14px; align-items: start; }
@media (max-width: 980px) { .area-bottom { grid-template-columns: 1fr; } }

.info-flex { display: flex; gap: 20px; flex-wrap: wrap; justify-content: space-between; }
.info-cards { display: flex; gap: 12px; }
.card { border: 1px solid var(--line); border-radius: 8px; padding: 10px 14px; min-width: 170px; background: #fafcfe; display: flex; flex-direction: column; gap: 4px; }
.card .lbl { font-size: 12px; color: #67788a; }
.card .selling-out { font-size: 20px; font-weight: 700; color: var(--blue); }

/* calculator */
.calc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 1200px) { .calc-grid { grid-template-columns: 1fr; } }
.calc-box { border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; }
.calc-box label { display: flex; justify-content: space-between; align-items: center; gap: 8px; font-size: 13px; margin: 5px 0; }
.calc-box input { width: 110px; }
.calc-out { width: 100%; border-collapse: collapse; margin-top: 12px; font-size: 13.5px; }
.calc-out td { padding: 4px 8px; border-bottom: 1px solid #eef2f5; }
.calc-out .num { text-align: right; font-variant-numeric: tabular-nums; }
.calc-out .total td { border-top: 2px solid var(--ink); font-weight: 700; }
.calc-out .ref td { color: #8a97a5; font-style: italic; }
.calc-out .hl td { background: #eef7fc; font-weight: 600; }
.calc-out .big td { font-size: 16px; color: var(--blue); }

/* forms */
input, select, textarea { font: inherit; padding: 7px 9px; border: 1px solid var(--line); border-radius: 6px; background: #fff; }
textarea { width: 100%; resize: vertical; }
label { font-size: 13.5px; }
.stack { display: flex; flex-direction: column; gap: 8px; max-width: 360px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 12px; }
.grid2 label { display: flex; flex-direction: column; gap: 4px; }
@media (max-width: 700px) { .grid2 { grid-template-columns: 1fr; } }

.btn { border: 1px solid var(--line); background: #fff; padding: 7px 13px; border-radius: 7px; font: inherit; cursor: pointer; }
.btn:hover { background: #f4f8fb; }
.btn.primary { background: var(--blue); border-color: var(--blue); color: #fff; }
.btn.primary:hover { background: #0a5a8e; }
.btn.sign { background: var(--ok); border-color: var(--ok); color: #fff; }
.btn.danger { color: var(--danger); border-color: #e5c1bb; }
.btn.small { padding: 3px 9px; font-size: 12.5px; }

/* quotation editor */
.q-toolbar { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin-bottom: 12px; }
.q-toolbar .grow { flex: 1; }
.q-fields { border: 0; padding: 0; margin: 0; }
.q-fields:disabled { opacity: .75; }
.item { border: 1px solid var(--line); border-radius: 8px; padding: 10px; margin-bottom: 10px; background: #fbfdfe; }
.item-head { display: flex; gap: 8px; align-items: center; margin-bottom: 6px; }
.item-no { background: var(--blue); color: #fff; border-radius: 50%; width: 24px; height: 24px; display: grid; place-items: center; font-size: 12.5px; flex: none; }
.it-title { flex: 1; font-weight: 600; }
.item-row { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; margin-bottom: 6px; font-size: 13px; }
.item-row input[type=number] { width: 110px; }
.chk { display: flex; gap: 5px; align-items: center; }
.it-total { margin-left: auto; font-weight: 700; }
.q-total { text-align: right; font-size: 17px; margin: 10px 0 14px; }
.sig-info { margin-top: 10px; }

/* lists */
.qlist { width: 100%; border-collapse: collapse; font-size: 13.5px; margin-top: 10px; }
.qlist th { text-align: left; border-bottom: 2px solid var(--ink); padding: 6px 8px; }
.qlist td { border-bottom: 1px solid #eef2f5; padding: 6px 8px; }
.qlist .num { text-align: right; }
.qlist tr.inactive td { opacity: .5; }
.badge { background: #e8edf2; border-radius: 20px; padding: 2px 10px; font-size: 12px; }
.badge.ok { background: #d8f2e4; color: var(--ok); font-weight: 600; }

/* toast */
#toast { position: fixed; bottom: 22px; left: 50%; transform: translateX(-50%) translateY(20px); background: var(--ink); color: #fff; padding: 10px 20px; border-radius: 8px; opacity: 0; pointer-events: none; transition: .25s; font-size: 14px; z-index: 20; }
#toast.show { opacity: 1; transform: translateX(-50%); }
#toast.bad { background: var(--danger); }

/* login */
.login-body { display: grid; place-items: center; min-height: 100vh; }
.login-card { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 34px; width: 340px; text-align: center; box-shadow: 0 8px 30px rgba(20, 50, 80, .08); }
.login-logo { height: 60px; margin-bottom: 8px; }
.login-card h1 { font-size: 19px; margin: 0 0 18px; color: var(--blue); }
.login-card form { display: flex; flex-direction: column; gap: 10px; }

/* v2 additions */
.badge.exp { background: #fdeecd; color: #8a5a00; font-weight: 600; }
.req { color: var(--danger); }
input.invalid { border-color: var(--danger); box-shadow: 0 0 0 2px rgba(192,57,43,.15); }
.row-actions { white-space: nowrap; }
.row-actions .btn { margin-right: 4px; }

/* v3 additions */
.gi-box { flex: 1; min-width: 320px; }
.gi-grid { display: grid; grid-template-columns: repeat(4, minmax(140px, 1fr)); gap: 10px; margin: 8px 0 4px; }
.gi-grid label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; }
@media (max-width: 900px) { .gi-grid { grid-template-columns: 1fr 1fr; } }
input[data-money] { text-align: right; width: 120px; font-variant-numeric: tabular-nums; }

/* v4 additions */
.info-cards { display: flex; flex-direction: column; gap: 8px; min-width: 300px; }
.card.row { flex-direction: row; justify-content: space-between; align-items: center; padding: 9px 14px; }
.card.row .val { font-weight: 700; font-size: 16px; color: var(--blue); }
.card.row .selling-out { font-size: 18px; }
.item.auto { border-color: #d9b96a; background: #fffdf4; }