:root {
  --bg: #eef3fb;
  --surface: #ffffff;
  --surface-alt: #f4f8fd;
  --border: #d8e4f5;
  --border-strong: #b9cdec;

  --text: #16253e;
  --text-muted: #5c6c88;
  --text-faint: #8ea0bc;

  --blue-50: #eaf2fd;
  --blue-100: #d3e3fa;
  --blue-200: #a9c8f2;
  --blue-300: #7fa8e6;
  --blue-500: #2f6fd6;
  --blue-600: #255cb8;
  --blue-700: #1c4894;
  --blue-900: #102c5e;

  --green: #3d8f6b;
  --green-bg: #e3f3ea;
  --amber: #b8842c;
  --amber-bg: #faf1de;
  --gray-bg: #eef1f6;

  --radius: 10px;
  --shadow: 0 1px 2px rgba(16, 44, 94, 0.06), 0 4px 16px rgba(16, 44, 94, 0.06);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.4;
}

button, input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

/* ---------- Login ---------- */
.login-body {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  background: linear-gradient(160deg, var(--blue-50), var(--bg) 60%);
}
.login-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 32px 28px;
  width: 320px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.login-card h1 { margin: 0; font-size: 20px; color: var(--blue-900); }
.login-card .muted { color: var(--text-muted); margin: 0 0 8px; font-size: 13px; }
.login-card input {
  padding: 10px 12px;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  background: var(--surface-alt);
}
.login-card button {
  padding: 10px 12px;
  border: none;
  border-radius: 8px;
  background: var(--blue-500);
  color: white;
  font-weight: 600;
  cursor: pointer;
}
.login-card button:hover { background: var(--blue-600); }
.error { color: #b5433a; font-size: 13px; min-height: 16px; margin: 0; }

/* ---------- App shell ---------- */
#app { display: flex; flex-direction: column; min-height: 100vh; }

.topbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 20px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 20;
  flex-wrap: wrap;
}
.brand { font-weight: 700; color: var(--blue-900); font-size: 16px; white-space: nowrap; }

.view-tabs { display: flex; gap: 4px; background: var(--gray-bg); padding: 3px; border-radius: 8px; }
.tab {
  border: none;
  background: transparent;
  padding: 7px 14px;
  border-radius: 6px;
  cursor: pointer;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 13px;
}
.tab.active { background: var(--surface); color: var(--blue-700); box-shadow: 0 1px 2px rgba(16,44,94,0.1); }

.topbar-actions { display: flex; gap: 8px; margin-left: auto; align-items: center; flex-wrap: wrap; }
.topbar-actions input {
  padding: 8px 10px;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  background: var(--surface-alt);
  min-width: 200px;
}

button.btn-primary {
  background: var(--blue-500);
  color: white;
  border: none;
  padding: 8px 14px;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
}
button.btn-primary:hover { background: var(--blue-600); }
button.btn-ghost {
  background: transparent;
  border: 1px solid var(--border-strong);
  color: var(--text-muted);
  padding: 8px 12px;
  border-radius: 8px;
  cursor: pointer;
}
button.btn-ghost:hover { background: var(--gray-bg); }
button.btn-sm {
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--text-muted);
  padding: 4px 9px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
}
button.btn-sm:hover { background: var(--blue-50); border-color: var(--blue-200); color: var(--blue-700); }
button.icon-btn {
  border: none;
  background: transparent;
  cursor: pointer;
  color: var(--text-faint);
  padding: 2px 6px;
  border-radius: 6px;
  font-size: 14px;
}
button.icon-btn:hover { background: var(--blue-50); color: var(--blue-700); }

#mainArea { flex: 1; padding: 20px 24px 60px; max-width: 1200px; width: 100%; margin: 0 auto; }

.section-title {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  font-weight: 700;
  margin: 22px 0 10px;
}
.section-title:first-child { margin-top: 0; }

/* ---------- Ideas rail ---------- */
.ideas-rail { display: flex; flex-wrap: wrap; gap: 10px; }
.idea-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--surface);
  border: 1px dashed var(--border-strong);
  border-radius: 20px;
  padding: 7px 8px 7px 14px;
  font-size: 13px;
  color: var(--text);
}
.idea-chip .idea-title { max-width: 220px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ---------- Project cards ---------- */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 14px;
}
.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 5px solid var(--blue-500);
  border-radius: var(--radius);
  padding: 14px 16px;
  cursor: pointer;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: transform .08s ease;
}
.project-card:hover { transform: translateY(-2px); }
.project-card .p-title { font-weight: 700; color: var(--blue-900); font-size: 15px; }
.project-card .p-meta { display: flex; justify-content: space-between; align-items: center; font-size: 12px; color: var(--text-muted); }
.progress-bar { height: 6px; border-radius: 4px; background: var(--gray-bg); overflow: hidden; }
.progress-bar > div { height: 100%; background: var(--blue-500); }

.status-pill {
  border: none;
  border-radius: 20px;
  padding: 3px 10px;
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
  text-transform: capitalize;
}
.status-someday   { background: var(--gray-bg); color: var(--text-muted); }
.status-this_month{ background: var(--blue-50); color: var(--blue-600); }
.status-this_week  { background: var(--blue-100); color: var(--blue-700); }
.status-done       { background: var(--green-bg); color: var(--green); }
.status-archived   { background: #f1f1f1; color: #9a9a9a; }

/* ---------- Project detail ---------- */
.breadcrumb { display: flex; align-items: center; gap: 8px; margin-bottom: 14px; color: var(--blue-600); cursor: pointer; font-weight: 600; font-size: 13px; }
.detail-header {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  margin-bottom: 16px;
  box-shadow: var(--shadow);
}
.detail-header .row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-top: 8px; }
.detail-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--blue-900);
  border: none;
  background: transparent;
  width: 100%;
  padding: 2px 0;
}
.detail-notes {
  width: 100%;
  border: 1px solid var(--border);
  background: var(--surface-alt);
  border-radius: 8px;
  padding: 8px 10px;
  margin-top: 8px;
  resize: vertical;
  min-height: 40px;
}

.task-list { display: flex; flex-direction: column; gap: 8px; }
.task-row {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
}
.task-row .task-main { display: flex; align-items: center; gap: 10px; }
.task-row input[type="text"].title-input {
  border: none;
  background: transparent;
  flex: 1;
  font-weight: 600;
  padding: 4px 2px;
}
.task-row.done .title-input { text-decoration: line-through; color: var(--text-faint); }
.task-row .task-controls { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.task-row input[type="date"] {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 3px 6px;
  font-size: 12px;
  background: var(--surface-alt);
}

.subtask-list { margin: 8px 0 2px 30px; display: flex; flex-direction: column; gap: 6px; }
.subtask-row { display: flex; align-items: center; gap: 8px; font-size: 13px; }
.subtask-row input[type="text"] { border: none; background: transparent; flex: 1; padding: 2px; }
.subtask-row.done input[type="text"] { text-decoration: line-through; color: var(--text-faint); }

.add-inline { display: flex; gap: 8px; margin-top: 10px; }
.add-inline input {
  flex: 1;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  padding: 8px 10px;
  background: var(--surface-alt);
}

/* ---------- Planner ---------- */
.planner-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.planner-col {
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px;
  min-height: 200px;
}
.planner-col h3 { margin: 0 0 10px; font-size: 13px; color: var(--blue-700); display: flex; justify-content: space-between; align-items: center; }
.planner-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
  margin-bottom: 8px;
  box-shadow: var(--shadow);
}
.planner-card .pc-title { font-weight: 600; font-size: 13px; }
.planner-card .pc-meta { display: flex; justify-content: space-between; align-items: center; margin-top: 6px; }
.planner-card select { border: 1px solid var(--border); border-radius: 6px; font-size: 11px; padding: 2px 4px; background: var(--surface-alt); }

.week-days { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.week-day-col { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 8px; min-height: 90px; }
.week-day-col h4 { margin: 0 0 6px; font-size: 11px; color: var(--text-muted); }
.week-day-col.today h4 { color: var(--blue-600); }

/* ---------- Calendar ---------- */
.calendar-nav { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.calendar-nav h2 { margin: 0; font-size: 16px; color: var(--blue-900); }
.calendar-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 6px; }
.cal-dow { text-align: center; font-size: 11px; color: var(--text-muted); font-weight: 700; padding-bottom: 4px; }
.cal-day {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  min-height: 88px;
  padding: 6px;
  font-size: 11px;
}
.cal-day.outside { background: var(--gray-bg); color: var(--text-faint); }
.cal-day.today { border-color: var(--blue-500); border-width: 2px; }
.cal-day .cal-date { font-weight: 700; margin-bottom: 4px; }
.cal-item {
  border-radius: 5px;
  padding: 2px 5px;
  margin-bottom: 3px;
  background: var(--blue-50);
  color: var(--blue-700);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  cursor: pointer;
}

/* ---------- Modal ---------- */
.modal-backdrop {
  position: fixed; inset: 0; background: rgba(16,37,62,0.35);
  display: flex; align-items: center; justify-content: center; z-index: 100;
}
.modal-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 20px;
  width: 420px;
  max-width: 92vw;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.modal-card h3 { margin: 0; color: var(--blue-900); }
.modal-card label { font-size: 12px; color: var(--text-muted); font-weight: 600; margin-bottom: -4px; }
.modal-card input, .modal-card textarea, .modal-card select {
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  padding: 8px 10px;
  background: var(--surface-alt);
  width: 100%;
}
.modal-actions { display: flex; justify-content: space-between; margin-top: 6px; }
.color-swatches { display: flex; gap: 6px; }
.color-swatch { width: 22px; height: 22px; border-radius: 50%; cursor: pointer; border: 2px solid transparent; }
.color-swatch.selected { border-color: var(--blue-900); }

.empty-hint { color: var(--text-faint); font-size: 13px; padding: 10px 2px; }

@media (max-width: 900px) {
  .planner-grid { grid-template-columns: 1fr 1fr; }
  .week-days { grid-template-columns: 1fr 1fr; }
  .project-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .topbar { padding: 10px 12px; }
  .topbar-actions input { min-width: 120px; }
  #mainArea { padding: 14px 12px 40px; }
  .planner-grid { grid-template-columns: 1fr; }
  .week-days { grid-template-columns: 1fr 1fr; }
  .project-grid { grid-template-columns: 1fr; }
  .calendar-grid { grid-template-columns: repeat(7, minmax(34px, 1fr)); }
  .cal-day { min-height: 60px; padding: 3px; font-size: 9px; }
}