:root {
  --bg: #0b0e14;
  --panel: #141a24;
  --panel-2: #1b2331;
  --line: #2b3648;
  --text: #ffffff;
  --muted: #9fb0c3;
  /* Bright, high-contrast status colors (color-blind friendly, always paired with icon + word) */
  --green: #00e676;
  --green-ink: #04361f;
  --red: #ff1744;
  --red-ink: #3a020c;
  --amber: #ffb300;
  --amber-ink: #3a2600;
  --blue: #40c4ff;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", Roboto, system-ui, -apple-system, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

/* ---------------- Login ---------------- */
.login-body {
  display: flex; align-items: center; justify-content: center;
  min-height: 100vh; padding: 24px;
  background: radial-gradient(1200px 600px at 50% -10%, #16233a 0%, var(--bg) 60%);
}
.login-card {
  width: 100%; max-width: 380px;
  background: var(--panel); border: 1px solid var(--line);
  border-radius: 18px; padding: 32px 26px; text-align: center;
  box-shadow: 0 20px 60px rgba(0,0,0,.5);
}
.login-logo { font-size: 34px; font-weight: 900; letter-spacing: 3px; }
.login-sub { color: var(--muted); margin: 6px 0 22px; }
.login-card input {
  width: 100%; padding: 16px; font-size: 18px; text-align: center;
  background: var(--panel-2); color: var(--text);
  border: 2px solid var(--line); border-radius: 12px; outline: none;
}
.login-card input:focus { border-color: var(--blue); }
.login-card button {
  width: 100%; margin-top: 14px; padding: 16px; font-size: 18px; font-weight: 800;
  background: var(--green); color: var(--green-ink);
  border: 0; border-radius: 12px; cursor: pointer;
}
.login-card button:active { transform: translateY(1px); }
.login-error { color: var(--red); font-weight: 700; margin: 14px 0 0; }
.login-hint { color: var(--muted); font-size: 13px; margin: 18px 0 0; }

/* ---------------- TV display ---------------- */
.tv-body {
  display: flex; flex-direction: column; height: 100vh; overflow: hidden;
}
.tv-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 26px; border-bottom: 2px solid var(--line);
  background: linear-gradient(180deg, #10182a, #0b0e14);
}
.brand { font-size: 30px; font-weight: 900; letter-spacing: 4px; }
.tv-header-right { display: flex; align-items: baseline; gap: 22px; }
.month-label { font-size: 22px; font-weight: 700; color: var(--blue); }
.clock { font-size: 22px; font-weight: 700; color: var(--muted); font-variant-numeric: tabular-nums; }

.columns {
  flex: 1; display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 14px; padding: 14px; min-height: 0;
}
.col {
  display: flex; flex-direction: column; min-height: 0;
  background: var(--panel); border: 1px solid var(--line);
  border-top: 6px solid var(--accent, var(--blue));
  border-radius: 14px; overflow: hidden;
}
.col-head { padding: 12px 16px 10px; text-align: center; border-bottom: 1px solid var(--line); }
.col-letters {
  font-size: clamp(44px, 6vw, 84px); font-weight: 900; line-height: 1;
  letter-spacing: 4px; color: var(--accent, #fff);
  text-shadow: 0 0 22px rgba(64,196,255,.25);
}
.col-name { font-size: 20px; font-weight: 800; margin-top: 6px; }
.col-city { font-size: 14px; color: var(--muted); }

.col-body { flex: 1; overflow: auto; padding: 12px 12px 14px; }
.col-body::-webkit-scrollbar { width: 8px; }
.col-body::-webkit-scrollbar-thumb { background: var(--line); border-radius: 8px; }

/* Big rent status banner */
.rent {
  display: flex; align-items: center; gap: 12px;
  border-radius: 12px; padding: 12px 14px; margin-bottom: 12px; font-weight: 900;
  border: 2px solid transparent;
}
.rent .rent-icon { font-size: 30px; line-height: 1; }
.rent .rent-main { font-size: 20px; letter-spacing: .5px; }
.rent .rent-sub { font-size: 13px; font-weight: 700; opacity: .9; }
.rent.paid { background: rgba(0,230,118,.14); border-color: var(--green); color: var(--green); }
.rent.due  { background: rgba(255,23,68,.16); border-color: var(--red); color: var(--red); }

.section-title {
  font-size: 12px; text-transform: uppercase; letter-spacing: 1.5px;
  color: var(--muted); font-weight: 800; margin: 14px 2px 8px;
}
.section-title:first-child { margin-top: 0; }

/* Units */
.unit {
  display: flex; align-items: center; gap: 10px;
  background: var(--panel-2); border: 1px solid var(--line);
  border-radius: 10px; padding: 9px 11px; margin-bottom: 8px;
}
.unit .u-dot { width: 12px; height: 12px; border-radius: 50%; flex: 0 0 auto; }
.u-dot.paid { background: var(--green); }
.u-dot.unpaid { background: var(--red); }
.u-dot.vacant { background: var(--amber); }
.unit .u-main { flex: 1; min-width: 0; }
.unit .u-label { font-weight: 800; font-size: 15px; }
.unit .u-tenant { font-size: 13px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.unit .u-tag {
  font-size: 11px; font-weight: 900; letter-spacing: .5px;
  padding: 3px 8px; border-radius: 999px; white-space: nowrap;
}
.u-tag.paid { background: var(--green); color: var(--green-ink); }
.u-tag.unpaid { background: var(--red); color: #fff; }
.u-tag.vacant { background: var(--amber); color: var(--amber-ink); }

/* Alerts */
.alert {
  display: flex; gap: 9px; align-items: flex-start;
  background: rgba(255,179,0,.12); border: 1px solid var(--amber);
  border-radius: 10px; padding: 9px 11px; margin-bottom: 8px;
  font-size: 14px; font-weight: 600; color: #ffd780;
}
.alert .a-icon { color: var(--amber); font-size: 16px; line-height: 1.2; }

/* Todos */
.todo {
  display: flex; gap: 9px; align-items: flex-start;
  padding: 7px 4px; border-bottom: 1px dashed var(--line); font-size: 14px;
}
.todo:last-child { border-bottom: 0; }
.todo .t-box { font-size: 16px; line-height: 1.2; }
.todo.done { color: var(--muted); text-decoration: line-through; }
.todo.done .t-box { color: var(--green); }

.empty { color: var(--muted); font-size: 13px; font-style: italic; padding: 2px 2px 4px; }

.tv-footer {
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px 26px; border-top: 1px solid var(--line);
  color: var(--muted); font-size: 13px;
}
.admin-link { color: var(--blue); text-decoration: none; font-weight: 700; }

/* ---------------- Admin ---------------- */
.admin-body { background: var(--bg); color: var(--text); min-height: 100vh; }
.admin-wrap { max-width: 760px; margin: 0 auto; padding: 16px 16px 120px; }
.admin-top {
  position: sticky; top: 0; z-index: 5;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  background: rgba(11,14,20,.96); backdrop-filter: blur(6px);
  padding: 12px 4px; border-bottom: 1px solid var(--line); margin-bottom: 14px;
}
.admin-top h1 { font-size: 18px; margin: 0; letter-spacing: 2px; }
.admin-top .sub { font-size: 12px; color: var(--muted); }
.month-row { display: flex; gap: 8px; align-items: center; margin-bottom: 16px; }
.month-row label { font-size: 13px; color: var(--muted); font-weight: 700; }

.acol {
  background: var(--panel); border: 1px solid var(--line);
  border-top: 5px solid var(--accent, var(--blue));
  border-radius: 14px; padding: 14px; margin-bottom: 16px;
}
.acol-head { display: flex; align-items: baseline; gap: 10px; margin-bottom: 6px; }
.acol-letters { font-size: 30px; font-weight: 900; color: var(--accent); letter-spacing: 2px; }
.acol-name { font-weight: 800; }
.acol-city { color: var(--muted); font-size: 13px; }

.rent-toggle {
  display: flex; align-items: center; justify-content: space-between;
  background: var(--panel-2); border: 2px solid var(--line);
  border-radius: 12px; padding: 12px 14px; margin: 10px 0 4px; font-weight: 800;
}
.rent-toggle.on { border-color: var(--green); color: var(--green); background: rgba(0,230,118,.10); }
.rent-toggle.off { border-color: var(--red); color: var(--red); background: rgba(255,23,68,.10); }

.a-section { margin-top: 14px; }
.a-section h3 {
  font-size: 12px; text-transform: uppercase; letter-spacing: 1.4px;
  color: var(--muted); margin: 0 0 8px;
}
.a-unit {
  display: grid; grid-template-columns: 1fr auto; gap: 8px;
  background: var(--panel-2); border: 1px solid var(--line);
  border-radius: 10px; padding: 10px; margin-bottom: 8px;
}
.a-unit .row1 { display: flex; gap: 8px; }
.a-unit .row2 { display: flex; gap: 8px; align-items: center; grid-column: 1 / -1; flex-wrap: wrap; }
.a-unit input[type="text"] {
  background: var(--bg); border: 1px solid var(--line); color: var(--text);
  border-radius: 8px; padding: 9px 10px; font-size: 15px; width: 100%;
}
.a-unit .u-label-in { max-width: 110px; }
.chip {
  border: 2px solid var(--line); background: transparent; color: var(--muted);
  border-radius: 999px; padding: 7px 12px; font-size: 13px; font-weight: 800; cursor: pointer;
}
.chip.active-green { border-color: var(--green); color: var(--green); background: rgba(0,230,118,.12); }
.chip.active-red { border-color: var(--red); color: var(--red); background: rgba(255,23,68,.12); }
.chip.active-amber { border-color: var(--amber); color: var(--amber); background: rgba(255,179,0,.12); }

.list-item {
  display: flex; gap: 8px; align-items: center; margin-bottom: 8px;
}
.list-item input[type="text"] {
  flex: 1; background: var(--bg); border: 1px solid var(--line); color: var(--text);
  border-radius: 8px; padding: 10px; font-size: 15px;
}
.icon-btn {
  background: var(--panel-2); border: 1px solid var(--line); color: var(--muted);
  border-radius: 8px; width: 40px; height: 40px; font-size: 18px; cursor: pointer; flex: 0 0 auto;
}
.icon-btn.danger { color: var(--red); border-color: rgba(255,23,68,.5); }
.icon-btn.check { color: var(--green); }
.add-btn {
  background: transparent; border: 2px dashed var(--line); color: var(--blue);
  border-radius: 10px; padding: 10px; width: 100%; font-weight: 800; cursor: pointer; font-size: 14px;
}
.todo-check { font-size: 20px; background: none; border: 0; cursor: pointer; width: 34px; }

.save-bar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 10;
  display: flex; gap: 10px; align-items: center; justify-content: space-between;
  padding: 12px 16px; background: rgba(11,14,20,.97);
  border-top: 1px solid var(--line);
}
.save-bar .status { font-size: 13px; color: var(--muted); }
.save-bar button {
  padding: 14px 26px; font-size: 16px; font-weight: 900;
  background: var(--green); color: var(--green-ink); border: 0; border-radius: 12px; cursor: pointer;
}
.save-bar button:disabled { opacity: .5; }
.ghost-link { color: var(--muted); text-decoration: none; font-size: 13px; }

@media (max-width: 560px) {
  .a-unit .u-label-in { max-width: 90px; }
}