:root {
  --bg: #0b1215;
  --bg-card: #121b1f;
  --bg-card-2: #182428;
  --border: #223038;
  --text: #eaf2f2;
  --muted: #93a8ac;
  --accent: #2dd4bf;
  --accent-2: #5eead4;
  --green: #3ddc97;
  --blue: #4ea1ff;
  --orange: #ff8a3d;
  --red: #ff5c5c;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

/* Login */
.login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at 30% 20%, #142023, #0b1215 70%);
  padding: 20px;
}
.login-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 40px 32px;
  width: 100%;
  max-width: 360px;
  text-align: center;
  box-shadow: 0 20px 60px rgba(0,0,0,.4);
}
.login-icon { font-size: 40px; margin-bottom: 8px; }
.login-box h1 { margin: 0 0 4px; font-size: 26px; }
.login-sub { color: var(--muted); font-size: 14px; margin-bottom: 24px; }
.login-error { background: rgba(255,92,92,.15); color: var(--red); padding: 8px 12px; border-radius: 8px; font-size: 13px; margin-bottom: 16px; }
.login-box input {
  width: 100%; padding: 12px 14px; border-radius: 10px; border: 1px solid var(--border);
  background: var(--bg-card-2); color: var(--text); font-size: 15px; margin-bottom: 14px;
}
.login-box button {
  width: 100%; padding: 12px; border-radius: 10px; border: none;
  background: var(--accent); color: #04201c; font-weight: 600; font-size: 15px; cursor: pointer;
}
.login-box button:hover { background: var(--accent-2); }

/* App shell */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 28px; border-bottom: 1px solid var(--border);
  position: sticky; top: 0; background: rgba(11,18,21,.92); backdrop-filter: blur(6px); z-index: 10;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 12px var(--accent); }
.brand h1 { margin: 0; font-size: 18px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.logout-btn { color: var(--muted); text-decoration: none; font-size: 13px; border: 1px solid var(--border); padding: 8px 14px; border-radius: 8px; }
.logout-btn:hover { color: var(--text); border-color: var(--accent); }

main, .tabs { max-width: 1080px; margin: 0 auto; padding-left: 20px; padding-right: 20px; }

.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); padding-top: 14px; overflow-x: auto; }
.tab-btn {
  background: none; border: none; color: var(--muted); font-size: 13px; padding: 12px 10px;
  cursor: pointer; border-bottom: 2px solid transparent; font-weight: 600; white-space: nowrap;
}
.tab-btn.active { color: var(--text); border-bottom-color: var(--accent); }

.tab-panel { display: none; padding: 24px 0 60px; }
.tab-panel.active { display: block; }

.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-bottom: 14px; }
.card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 14px; padding: 18px; }
.card.wide { grid-column: span 2; }
.card h3 { margin: 0 0 12px; font-size: 13px; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: .03em; }
.card label { display: block; font-size: 12px; color: var(--muted); margin-bottom: 4px; margin-top: 8px; }
.card input, .card textarea {
  width: 100%; padding: 10px 12px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--bg-card-2); color: var(--text); font-size: 14px; margin-bottom: 4px; font-family: inherit;
}
.card textarea { resize: vertical; }

.save-btn {
  padding: 11px 18px; border-radius: 10px; border: none;
  background: var(--accent); color: #04201c; font-weight: 600; cursor: pointer; font-size: 13px; margin-bottom: 14px;
}
.save-btn:hover { background: var(--accent-2); }
.save-btn.saved { background: var(--green); color: #05271b; }
.save-btn.secondary { background: var(--bg-card-2); color: var(--text); border: 1px solid var(--border); margin-left: 8px; }
.save-btn.secondary:hover { border-color: var(--accent); color: var(--accent); }

.kpi-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 8px; }
.kpi-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 14px; padding: 16px; text-align: center; }
.kpi-num { font-size: 24px; font-weight: 700; color: var(--accent); }
.kpi-label { font-size: 12px; color: var(--muted); margin-top: 4px; }

/* Calculator */
.calc-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 16px; align-items: start; }
.calc-inputs { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.calc-result { background: var(--bg-card); border: 1px solid var(--accent); border-radius: 14px; padding: 18px; position: sticky; top: 90px; }
.calc-result h3 { margin-top: 0; color: var(--text); }
.result-row { display: flex; justify-content: space-between; font-size: 13px; padding: 6px 0; color: var(--muted); border-bottom: 1px dashed var(--border); }
.result-row b { color: var(--text); font-weight: 600; }
.result-row.total { border-top: 1px solid var(--border); margin-top: 6px; padding-top: 10px; }
.result-row.final { font-size: 16px; padding: 12px 0; border: none; }
.result-row.final b { color: var(--accent); font-size: 20px; }

/* Tables */
.table-wrap { overflow-x: auto; }
.data-table { width: 100%; border-collapse: collapse; background: var(--bg-card); border-radius: 14px; overflow: hidden; }
.data-table th {
  text-align: left; font-size: 11px; text-transform: uppercase; letter-spacing: .03em; color: var(--muted);
  padding: 12px 14px; border-bottom: 1px solid var(--border); background: var(--bg-card-2);
}
.data-table td { padding: 8px 14px; border-bottom: 1px solid var(--border); font-size: 13px; }
.data-table input, .data-table select {
  width: 100%; padding: 7px 8px; border-radius: 6px; border: 1px solid var(--border);
  background: var(--bg-card-2); color: var(--text); font-size: 13px;
}
.data-table .del-row { background: none; border: none; color: var(--muted); cursor: pointer; }
.data-table .del-row:hover { color: var(--red); }

/* Checklist reuse */
.task-row { display: flex; align-items: flex-start; gap: 10px; padding: 6px 0; }
.task-row input[type=checkbox] { margin-top: 3px; accent-color: var(--green); width: 16px; height: 16px; }
.task-row span { font-size: 14px; line-height: 1.4; }
.task-row.done span { text-decoration: line-through; color: var(--muted); }
.task-row .del-task { margin-left: auto; background: none; border: none; color: var(--muted); cursor: pointer; font-size: 13px; }
.task-row .del-task:hover { color: var(--red); }
.add-task-row { display: flex; gap: 8px; margin-top: 10px; }
.add-task-row input { flex: 1; padding: 8px 10px; border-radius: 8px; border: 1px solid var(--border); background: var(--bg-card-2); color: var(--text); font-size: 13px; }
.add-task-row button { padding: 8px 12px; border-radius: 8px; border: 1px solid var(--border); background: var(--bg-card-2); color: var(--text); cursor: pointer; font-size: 13px; }
.add-task-row button:hover { border-color: var(--accent); color: var(--accent); }

.channel-row { display: flex; align-items: center; gap: 10px; padding: 6px 0; }
.channel-row input[type=checkbox] { accent-color: var(--accent); width: 16px; height: 16px; }
.channel-row .del-task { margin-left: auto; background: none; border: none; color: var(--muted); cursor: pointer; font-size: 13px; }
.channel-row .del-task:hover { color: var(--red); }

/* Auto-save status */
.autosave-status { font-size: 12px; color: var(--green); margin-top: 12px; min-height: 16px; }
.invest-total { margin-top: 14px; font-size: 15px; font-weight: 600; color: var(--accent); }

@media (max-width: 900px) {
  .calc-grid { grid-template-columns: 1fr; }
  .calc-result { position: static; }
  .card-grid { grid-template-columns: 1fr; }
  .card.wide { grid-column: span 1; }
  .kpi-row { grid-template-columns: 1fr; }
  .calc-inputs { grid-template-columns: 1fr; }
}