:root {
  --charcoal: #1E1E1E;
  --blue: #0D3B66;
  --mist: #F2F4F7;
  --line: #E3E7EC;
  --muted: #5A6470;
  --danger: #B3261E;
  --font: Arial, Helvetica, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
body { margin: 0; font-family: var(--font); color: var(--charcoal); background: var(--mist); }
.hidden { display: none !important; }
button { font-family: var(--font); cursor: pointer; }

.login { position: fixed; inset: 0; display: flex; align-items: center; justify-content: center; background: var(--mist); z-index: 50; }
.login-card { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 32px; width: 320px; display: flex; flex-direction: column; gap: 12px; }
.login-card h1 { font-size: 18px; margin: 0 0 8px; color: var(--blue); }
.login-card input { padding: 10px; border: 1px solid var(--line); border-radius: 6px; font-size: 15px; }
.login-card button { padding: 10px; background: var(--blue); color: #fff; border: 0; border-radius: 6px; font-size: 15px; }
.error { color: var(--danger); font-size: 13px; min-height: 16px; margin: 0; }

header { background: #fff; border-bottom: 1px solid var(--line); display: flex; align-items: center; gap: 24px; padding: 0 20px; position: sticky; top: 0; z-index: 10; flex-wrap: wrap; }
.brand { font-size: 15px; color: var(--blue); white-space: nowrap; }
#tabs { display: flex; gap: 2px; overflow-x: auto; }
#tabs button { background: none; border: 0; border-bottom: 3px solid transparent; padding: 14px 14px 11px; font-size: 14px; color: var(--muted); white-space: nowrap; }
#tabs button.active { color: var(--charcoal); border-bottom-color: var(--blue); font-weight: bold; }

main { max-width: 1100px; margin: 0 auto; padding: 20px; }

/* Chat */
#tab-chat { display: flex; flex-direction: column; height: calc(100vh - 110px); }
.chat-log { flex: 1; overflow-y: auto; display: flex; flex-direction: column; gap: 12px; padding: 4px 2px 12px; }
.msg { max-width: 85%; padding: 12px 14px; border-radius: 10px; font-size: 14px; line-height: 1.45; white-space: pre-wrap; word-break: break-word; }
.msg.user { align-self: flex-end; background: var(--blue); color: #fff; }
.msg.assistant { align-self: flex-start; background: #fff; border: 1px solid var(--line); }
.msg.pending { color: var(--muted); font-style: italic; }
.msg .actions { margin-top: 8px; padding-top: 8px; border-top: 1px solid var(--line); font-size: 12px; color: var(--muted); }
.msg .thumb { max-width: 180px; max-height: 120px; border-radius: 6px; display: block; margin-top: 6px; border: 1px solid rgba(255,255,255,.4); }
.chat-input { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 10px; display: flex; flex-direction: column; gap: 8px; }
.chat-input textarea { border: 0; resize: vertical; font-family: var(--font); font-size: 14px; outline: none; min-height: 60px; }
.chat-input button { align-self: flex-end; background: var(--blue); color: #fff; border: 0; border-radius: 6px; padding: 8px 22px; font-size: 14px; }
.chat-input button:disabled { opacity: .5; cursor: default; }
.chat-images { display: flex; gap: 8px; flex-wrap: wrap; }
.chat-images:empty { display: none; }
.chat-images .chip { position: relative; }
.chat-images img { height: 56px; border-radius: 6px; border: 1px solid var(--line); display: block; }
.chat-images .x { position: absolute; top: -6px; right: -6px; width: 18px; height: 18px; border-radius: 50%; background: var(--charcoal); color: #fff; border: 0; font-size: 11px; line-height: 1; padding: 0; }

/* Dashboard */
.metrics { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 12px; }
.metric { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 14px; }
.metric .v { font-size: 26px; font-weight: bold; color: var(--blue); }
.metric .l { font-size: 12px; color: var(--muted); margin-top: 4px; }
.metric.warn .v { color: var(--danger); }
#due-panel { margin-bottom: 16px; }
.due { background: #FFF7E6; border: 1px solid #F0D9A8; border-radius: 10px; padding: 14px 16px; margin-bottom: 16px; }
.due h3 { margin: 0 0 8px; font-size: 14px; }
.due ul { margin: 0; padding-left: 18px; font-size: 13px; }
.due li { margin: 3px 0; }
.friday { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; margin-top: 16px; }
.friday h3 { margin: 0 0 8px; font-size: 14px; color: var(--blue); }
.friday ul { margin: 0; padding-left: 18px; font-size: 13px; color: var(--muted); }
.friday li { margin: 4px 0; }

/* Tables */
.toolbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
.toolbar h2 { font-size: 16px; margin: 0; }
.toolbar button { background: var(--blue); color: #fff; border: 0; border-radius: 6px; padding: 8px 16px; font-size: 13px; }
.table-wrap { overflow-x: auto; background: #fff; border: 1px solid var(--line); border-radius: 10px; }
table { border-collapse: collapse; width: 100%; font-size: 13px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { background: var(--mist); font-size: 11px; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); white-space: nowrap; position: sticky; top: 0; }
tbody tr { cursor: pointer; }
tbody tr:hover { background: #F7FAFF; }
tr.overdue td:first-child { border-left: 3px solid var(--danger); }
.pill { display: inline-block; padding: 2px 8px; border-radius: 10px; background: var(--mist); font-size: 12px; white-space: nowrap; }
.pill.hot { background: #FDECEA; color: var(--danger); }
.pill.good { background: #E8F3EC; color: #1B6E3C; }
td.num { text-align: right; white-space: nowrap; }
.empty { padding: 24px; color: var(--muted); font-size: 14px; text-align: center; }

/* Modal */
.modal { position: fixed; inset: 0; background: rgba(30,30,30,.45); display: flex; align-items: center; justify-content: center; z-index: 40; padding: 20px; }
.modal-card { background: #fff; border-radius: 10px; padding: 20px 22px; width: 640px; max-width: 100%; max-height: 90vh; overflow-y: auto; }
.modal-card h2 { font-size: 16px; margin: 0 0 14px; color: var(--blue); }
#modal-form { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 14px; }
#modal-form label { display: flex; flex-direction: column; gap: 4px; font-size: 12px; color: var(--muted); }
#modal-form label.wide { grid-column: 1 / -1; }
#modal-form input, #modal-form select, #modal-form textarea { padding: 8px; border: 1px solid var(--line); border-radius: 6px; font-family: var(--font); font-size: 13px; color: var(--charcoal); }
#modal-form textarea { min-height: 60px; resize: vertical; }
.modal-actions { display: flex; gap: 10px; margin-top: 16px; }
.modal-actions .spacer { flex: 1; }
.modal-actions button { padding: 9px 18px; border-radius: 6px; border: 1px solid var(--line); background: #fff; font-size: 13px; }
.modal-actions .primary { background: var(--blue); color: #fff; border-color: var(--blue); }
.modal-actions .danger { color: var(--danger); border-color: var(--danger); }

@media (max-width: 700px) {
  main { padding: 12px; }
  #tab-chat { height: calc(100vh - 150px); }
  #modal-form { grid-template-columns: 1fr; }
}