:root {
  --bg: #f4f5f7;
  --panel: #ffffff;
  --text: #1c2126;
  --text-dim: #6b7280;
  --border: #e3e6ea;
  --accent: #2563eb;
  --sidebar-bg: #14181f;
  --sidebar-text: #cfd6e0;
  --sidebar-active: #232a35;
  --danger: #dc2626;
  --ok: #16a34a;
  --warn: #d97706;
  --radius: 10px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #14161a;
    --panel: #1c1f24;
    --text: #e7e9ec;
    --text-dim: #9aa1ab;
    --border: #2b2f36;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #14161a;
  --panel: #1c1f24;
  --text: #e7e9ec;
  --text-dim: #9aa1ab;
  --border: #2b2f36;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: "IBM Plex Sans Thai", "IBM Plex Sans", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow: hidden;
}
code, .mono { font-family: "IBM Plex Mono", monospace; }

#app { height: 100%; display: flex; flex-direction: column; }

/* ---------- Login ---------- */
.login-wrap {
  height: 100%; display: flex; align-items: center; justify-content: center;
}
.login-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 32px; width: 340px; max-width: 90vw;
}
.login-card h1 { font-size: 18px; margin: 0 0 4px; }
.login-card p.sub { color: var(--text-dim); font-size: 13px; margin: 0 0 20px; }
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 12px; color: var(--text-dim); margin-bottom: 4px; }
input, select, textarea {
  width: 100%; padding: 9px 10px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--bg); color: var(--text); font: inherit;
}
button { font: inherit; cursor: pointer; }
.btn {
  padding: 9px 14px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--panel); color: var(--text);
}
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-danger { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn-block { width: 100%; }
.error-msg { color: var(--danger); font-size: 13px; margin-top: 8px; }

/* ---------- Shell ---------- */
.shell { display: flex; height: 100%; }
.sidebar {
  width: 200px; flex: none; background: var(--sidebar-bg); color: var(--sidebar-text);
  display: flex; flex-direction: column; padding: 16px 10px;
}
.sidebar .brand { font-weight: 700; color: #fff; padding: 0 8px 16px; font-size: 15px; }
.sidebar a, .sidebar .nav-item {
  display: block; padding: 9px 10px; border-radius: 8px; color: var(--sidebar-text);
  text-decoration: none; font-size: 14px; margin-bottom: 2px; cursor: pointer;
}
.sidebar .nav-item.active, .sidebar .nav-item:hover { background: var(--sidebar-active); color: #fff; }
.sidebar .spacer { flex: 1; }
.sidebar .who { font-size: 12px; padding: 8px; color: var(--text-dim); border-top: 1px solid #2a2f38; margin-top: 8px; }

.main { flex: 1; min-width: 0; display: flex; flex-direction: column; height: 100%; }
.topbar {
  height: 52px; flex: none; border-bottom: 1px solid var(--border); display: flex;
  align-items: center; padding: 0 16px; gap: 10px; background: var(--panel);
}
.topbar .title { font-weight: 600; font-size: 15px; }
.topbar .spacer { flex: 1; }

.filterbar {
  flex: none; border-bottom: 1px solid var(--border); padding: 10px 16px; display: flex;
  gap: 8px; align-items: center; flex-wrap: wrap; background: var(--panel);
}
.filterbar input[type=text] { max-width: 220px; }
.toggle-group { display: inline-flex; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.toggle-group button { border: none; background: var(--panel); padding: 7px 12px; font-size: 13px; }
.toggle-group button.active { background: var(--accent); color: #fff; }

/* ---------- Board ---------- */
.workspace { flex: 1; min-height: 0; display: flex; flex-direction: column; overflow: hidden; }
.board {
  flex: 1; min-height: 0; display: flex; gap: 12px; padding: 14px; overflow-x: auto;
  cursor: grab; user-select: none;
}
.board.panning { cursor: grabbing; }
.col {
  flex: 0 0 260px; min-height: 0; display: flex; flex-direction: column;
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
}
.col-head { padding: 10px 12px; font-size: 13px; font-weight: 600; border-bottom: 1px solid var(--border); display:flex; justify-content:space-between; }
.col-head .count { color: var(--text-dim); font-weight: 400; }
.col-body { flex: 1; min-height: 0; overflow-y: auto; padding: 8px; display: flex; flex-direction: column; gap: 8px; }

.card {
  background: var(--bg); border: 1px solid var(--border); border-radius: 8px; padding: 10px;
  cursor: pointer; font-size: 13px;
}
.card:hover { border-color: var(--accent); }
.card .no { font-family: "IBM Plex Mono", monospace; font-size: 11px; color: var(--text-dim); }
.card .t { font-weight: 600; margin: 4px 0; }
.chips { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 6px; }
.chip { font-size: 10.5px; padding: 2px 7px; border-radius: 999px; border: 1px solid var(--border); color: var(--text-dim); }
.chip.sev-critical { color: #fff; background: var(--danger); border-color: var(--danger); }
.chip.sev-major { color: #fff; background: var(--warn); border-color: var(--warn); }

/* ---------- Modal / drawer ---------- */
.overlay { position: fixed; inset: 0; background: rgba(0,0,0,.4); display: flex; justify-content: flex-end; z-index: 50; }
.drawer {
  width: 460px; max-width: 100vw; background: var(--panel); height: 100%; overflow-y: auto;
  padding: 20px; border-left: 1px solid var(--border);
}
.drawer h2 { font-size: 16px; margin: 0 0 2px; }
.drawer .meta { color: var(--text-dim); font-size: 12px; margin-bottom: 14px; }
.section { margin-bottom: 18px; }
.section h4 { font-size: 12px; text-transform: uppercase; letter-spacing: .04em; color: var(--text-dim); margin: 0 0 8px; }
.comment { border: 1px solid var(--border); border-radius: 8px; padding: 8px 10px; margin-bottom: 8px; font-size: 13px; }
.comment.internal { background: #3a2e10; border-color: #6b4f0a; }
.comment .who { font-size: 11px; color: var(--text-dim); margin-bottom: 4px; }
.actions-row { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.modal-center { position: fixed; inset: 0; background: rgba(0,0,0,.4); display:flex; align-items:center; justify-content:center; z-index:60; }
.modal-box { background: var(--panel); border-radius: var(--radius); padding: 20px; width: 420px; max-width: 92vw; }

[hidden] { display: none !important; }