:root {
  --ink: #1C1A16;
  --charcoal: #17161B;
  --charcoal-2: #201F26;
  --paper: #FAF7F1;
  --paper-2: #F1ECE1;
  --line: #E4DDCD;
  --amber: #E3960C;
  --amber-deep: #B9760A;
  --green: #4C8F63;
  --red: #C1503D;
  --muted: #7A7364;
  --white: #FFFFFF;
  --radius: 5px;
  --font-head: 'Space Grotesk', sans-serif;
  --font-body: 'IBM Plex Sans', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--paper);
  color: var(--ink);
  font-size: 15px;
  line-height: 1.5;
}

a { color: inherit; text-decoration: none; }

.shell {
  display: flex;
  min-height: 100vh;
}

/* ---------- Sidebar ---------- */
.sidebar {
  width: 264px;
  flex-shrink: 0;
  background: var(--charcoal);
  display: flex;
  flex-direction: column;
  padding: 28px 20px;
  position: sticky;
  top: 0;
  height: 100vh;
}

.brand { margin-bottom: 40px; }
.brand-logo { width: 100%; height: auto; display: block; }

.nav { display: flex; flex-direction: column; gap: 2px; flex: 1; }
.nav a {
  color: #B9B4A8;
  padding: 10px 12px;
  border-radius: var(--radius);
  font-size: 14.5px;
  font-weight: 500;
  transition: background 0.12s ease, color 0.12s ease;
}
.nav a:hover { background: var(--charcoal-2); color: var(--white); }
.nav a.active { background: var(--amber); color: var(--charcoal); font-weight: 600; }

/* ---------- Content ---------- */
.content { flex: 1; min-width: 0; max-width: 1560px; overflow-x: hidden; padding: 40px 48px; }

.page-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 28px; flex-wrap: wrap; gap: 12px; }
.page-head h1 { font-family: var(--font-head); font-size: 26px; font-weight: 600; margin: 0; }
.page-head p { color: var(--muted); margin: 4px 0 0; font-size: 14px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--amber);
  color: var(--charcoal);
  border: none;
  padding: 10px 18px;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
}
.btn:hover { background: var(--amber-deep); }
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}
.btn-ghost:hover { background: var(--paper-2); }
.btn-sm { padding: 6px 12px; font-size: 13px; }

/* ---------- Cards / panels ---------- */
.panel {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  margin-bottom: 22px;
  min-width: 0;
}
.panel h2 { font-family: var(--font-head); font-size: 16px; margin: 0 0 16px; }

.stat-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 28px; }
.stat {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
}
.stat .num { font-family: var(--font-mono); font-size: 26px; font-weight: 500; }
.stat .label { color: var(--muted); font-size: 13px; margin-top: 2px; }
.stat.warn .num { color: var(--red); }

/* ---------- Tables ---------- */
.table-scroll { overflow-x: auto; min-width: 0; }
table { width: 100%; border-collapse: collapse; }
th {
  text-align: left;
  font-size: 12.5px;
  color: var(--muted);
  font-weight: 600;
  padding: 8px 10px;
  border-bottom: 1px solid var(--line);
}
td {
  padding: 11px 10px;
  border-bottom: 1px solid var(--paper-2);
  font-size: 14px;
}
tr:last-child td { border-bottom: none; }
td.mono, .mono { font-family: var(--font-mono); font-size: 13px; }
td.num { text-align: right; }
th.num { text-align: right; }

.badge {
  display: inline-block;
  padding: 3px 9px;
  border-radius: 3px;
  font-size: 12px;
  font-weight: 600;
  background: var(--paper-2);
  color: var(--ink);
}
.badge.stage-enquiry { background: #EFE9DC; color: #6B6045; }
.badge.stage-quoted { background: #E8EEF5; color: #3D5F80; }
.badge.stage-approved { background: #E5EFE6; color: #3E7248; }
.badge.stage-ordered { background: #FBEFDB; color: var(--amber-deep); }
.badge.stage-delivered { background: #FBEFDB; color: var(--amber-deep); }
.badge.stage-installed { background: #E5EFE6; color: #3E7248; }
.badge.stage-commissioned { background: #E5EFE6; color: #2F5C3A; }
.badge.stage-closed { background: #E9E7E3; color: var(--muted); }
.badge.low { background: #F7E2DC; color: var(--red); }

/* ---------- Forms ---------- */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 18px; }
.form-grid.full { grid-template-columns: 1fr; }
.field { display: flex; flex-direction: column; gap: 5px; }
.field.span2 { grid-column: 1 / -1; }
.field label { font-size: 13px; font-weight: 600; color: var(--ink); }
.field input, .field select, .field textarea {
  font-family: var(--font-body);
  font-size: 14px;
  padding: 9px 11px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: 2px solid var(--amber);
  outline-offset: -1px;
  background: var(--white);
}
.form-actions { margin-top: 16px; display: flex; gap: 10px; }

.line-items { border: 1px solid var(--line); border-radius: var(--radius); margin-bottom: 12px; }
.line-item-row { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr auto; gap: 10px; padding: 10px 12px; border-bottom: 1px solid var(--paper-2); align-items: end; }
.line-item-row:last-child { border-bottom: none; }
.line-item-row .field label { font-size: 11px; }
.remove-line { background: none; border: none; color: var(--red); cursor: pointer; font-size: 18px; line-height: 1; padding: 8px; }

/* ---------- Kanban ---------- */
.board-scroll {
  overflow-x: auto;
  overflow-y: hidden;
  min-width: 0;
  padding-bottom: 14px;
  margin-bottom: -6px;
  scrollbar-width: thin;
  scrollbar-color: var(--amber) var(--paper-2);
}
.board-scroll::-webkit-scrollbar { height: 8px; }
.board-scroll::-webkit-scrollbar-track { background: var(--paper-2); border-radius: 4px; }
.board-scroll::-webkit-scrollbar-thumb { background: var(--amber); border-radius: 4px; }

.board { display: flex; gap: 10px; width: max-content; min-width: 100%; }
.board-col { flex: 0 0 168px; width: 168px; }
.board-col-head {
  font-size: 12px;
  font-weight: 600;
  color: var(--ink);
  padding: 8px 4px;
  border-top: 3px solid var(--amber);
  margin-bottom: 8px;
  display: flex;
  justify-content: space-between;
  white-space: nowrap;
}
.board-col-head .count { color: var(--muted); font-family: var(--font-mono); }
.board-card {
  display: block;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px 12px;
  margin-bottom: 8px;
  font-size: 13px;
  white-space: normal;
}
.board-card .pn { font-family: var(--font-mono); font-size: 11px; color: var(--muted); display: block; margin-bottom: 2px; }
.board-empty { color: var(--muted); font-size: 12.5px; padding: 8px 4px; white-space: nowrap; }

/* ---------- Stepper (project detail) ---------- */
.stepper { display: flex; flex-wrap: wrap; gap: 0; margin-bottom: 24px; }
.step {
  flex: 1;
  min-width: 110px;
  text-align: center;
  padding: 10px 6px;
  border-bottom: 3px solid var(--line);
  font-size: 12.5px;
  color: var(--muted);
  font-weight: 600;
  cursor: pointer;
  background: none;
  border-top: none; border-left: none; border-right: none;
  font-family: var(--font-body);
}
.step.done { border-bottom-color: var(--green); color: var(--ink); }
.step.current { border-bottom-color: var(--amber); color: var(--ink); }
.step:hover { background: var(--paper-2); }

.timeline { list-style: none; margin: 0; padding: 0; }
.timeline li { padding: 10px 0; border-bottom: 1px solid var(--paper-2); font-size: 14px; display: flex; justify-content: space-between; gap: 12px; }
.timeline li:last-child { border-bottom: none; }
.timeline .t-note { color: var(--muted); font-size: 13px; }
.timeline .t-when { color: var(--muted); font-size: 12.5px; font-family: var(--font-mono); white-space: nowrap; }

.empty-state { text-align: center; padding: 48px 20px; color: var(--muted); }
.empty-state h3 { font-family: var(--font-head); color: var(--ink); margin-bottom: 6px; }

@media (max-width: 900px) {
  .shell { flex-direction: column; }
  .sidebar {
    width: 100%;
    height: auto;
    position: sticky;
    top: 0;
    z-index: 10;
    flex-direction: row;
    align-items: center;
    padding: 12px 16px;
    gap: 16px;
  }
  .brand { margin-bottom: 0; flex: 0 0 auto; }
  .brand-logo { width: auto; height: 30px; }
  .nav {
    flex-direction: row;
    flex: 1;
    overflow-x: auto;
    gap: 4px;
    min-width: 0;
  }
  .nav a { white-space: nowrap; padding: 8px 12px; font-size: 13.5px; }
  .content { padding: 20px 16px; }
  .form-grid { grid-template-columns: 1fr; }
  .stat-row { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .line-item-row { grid-template-columns: 1fr; gap: 8px; }
  .remove-line { justify-self: end; }
  .page-head { flex-direction: column; align-items: stretch; }
  .page-head .btn, .page-head > div[style] { width: 100%; }
}

@media (max-width: 480px) {
  .stat-row { grid-template-columns: 1fr 1fr; }
  .stat .num { font-size: 22px; }
  .page-head h1 { font-size: 22px; }
}