/* ===== Reset & base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0f1117;
  --surface: #1a1d27;
  --surface2: #22263a;
  --border: #2e3352;
  --accent: #5b6af0;
  --accent-hover: #6e7cf5;
  --danger: #e04a4a;
  --danger-hover: #f05555;
  --text: #e8eaf6;
  --text-muted: #8891b5;
  --q1: rgba(239, 83, 80, 0.08);
  --q2: rgba(102, 187, 106, 0.08);
  --q3: rgba(255, 193, 7, 0.06);
  --q4: rgba(100, 181, 246, 0.06);
  --radius: 8px;
  --panel-width: 280px;
  --axis-label-size: 11px;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  font-size: 14px;
  height: 100vh;
  overflow: hidden;
  user-select: none;
}

/* ===== Auth overlay ===== */
#auth-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 11, 18, 0.96);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  backdrop-filter: blur(4px);
}

#auth-overlay.hidden { display: none; }

.auth-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 40px 36px;
  width: 340px;
  text-align: center;
}

.auth-box h1 {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 6px;
  letter-spacing: -0.3px;
}

.auth-box p {
  color: var(--text-muted);
  margin-bottom: 28px;
  font-size: 13px;
}

.auth-box input[type="password"] {
  width: 100%;
  padding: 10px 14px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 14px;
  margin-bottom: 12px;
  outline: none;
  transition: border-color 0.15s;
}

.auth-box input[type="password"]:focus {
  border-color: var(--accent);
}

.auth-box .btn-primary {
  width: 100%;
}

#auth-error {
  color: var(--danger);
  font-size: 12px;
  margin-top: 10px;
  min-height: 16px;
}

/* ===== Buttons ===== */
.btn-primary, .btn-ghost, .btn-danger {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  transition: background 0.15s, opacity 0.15s;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover { background: var(--accent-hover); }

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}
.btn-ghost:hover { background: var(--surface2); color: var(--text); }

.btn-danger {
  background: transparent;
  color: var(--danger);
  border: 1px solid var(--danger);
}
.btn-danger:hover { background: var(--danger); color: #fff; }

/* ===== Layout ===== */
#app {
  display: flex;
  height: 100vh;
  position: relative;
}

/* ===== Matrix ===== */
#matrix-wrap {
  flex: 1;
  position: relative;
  overflow: hidden;
}

#matrix {
  position: absolute;
  inset: 40px 40px 40px 40px;
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
}

/* Quadrant backgrounds */
#matrix::before, #matrix::after,
.q3-bg, .q4-bg {
  content: '';
  position: absolute;
  width: 50%;
  height: 50%;
  pointer-events: none;
}

#matrix::before { top: 0; right: 0; background: var(--q1); }  /* Q1: urgent+important */
#matrix::after  { top: 0; left: 0;  background: var(--q2); }  /* Q2: important not urgent */
.q3-bg { bottom: 0; right: 0; background: var(--q3); }        /* Q3: urgent not important */
.q4-bg { bottom: 0; left: 0;  background: var(--q4); }        /* Q4: neither */

/* Dividing lines */
.axis-h, .axis-v {
  position: absolute;
  background: var(--border);
  pointer-events: none;
}
.axis-h { left: 0; right: 0; top: 50%; height: 1px; }
.axis-v { top: 0; bottom: 0; left: 50%; width: 1px; }

/* Axis labels */
.axis-label {
  position: absolute;
  font-size: var(--axis-label-size);
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.5px;
  text-transform: uppercase;
  pointer-events: none;
}
.label-top    { top: 8px;  left: 50%; transform: translateX(-50%); }
.label-bottom { bottom: 8px; left: 50%; transform: translateX(-50%); }
.label-left   { left: 8px; top: 50%; transform: translateY(-50%) rotate(-90deg); transform-origin: center; }
.label-right  { right: 8px; top: 50%; transform: translateY(-50%) rotate(90deg); transform-origin: center; }

/* Quadrant corner hints */
.q-hint {
  position: absolute;
  font-size: 10px;
  font-weight: 600;
  color: var(--text-muted);
  opacity: 0.5;
  pointer-events: none;
  padding: 6px 8px;
}
.q-hint.q1 { top: 0;    right: 0;  }
.q-hint.q2 { top: 0;    left: 0;   }
.q-hint.q3 { bottom: 0; right: 0;  }
.q-hint.q4 { bottom: 0; left: 0;   }

/* Delete zone */
#delete-zone {
  position: absolute;
  bottom: 16px;
  left: 16px;
  width: 64px;
  height: 64px;
  border-radius: 50%;
  border: 2px dashed #5a2d2d;
  background: rgba(224, 74, 74, 0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  color: #5a3333;
  transition: border-color 0.15s, background 0.15s, color 0.15s;
  pointer-events: none; /* enabled when dragging */
  z-index: 10;
}
#delete-zone.drag-over {
  border-color: var(--danger);
  background: rgba(224, 74, 74, 0.2);
  color: var(--danger);
}

/* ===== Task cards on matrix ===== */
.task-card {
  position: absolute;
  transform: translate(-50%, -50%);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px 11px;
  min-width: 110px;
  max-width: 170px;
  cursor: grab;
  z-index: 5;
  transition: box-shadow 0.15s, border-color 0.15s;
  pointer-events: all;
}

.task-card:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 20px rgba(91, 106, 240, 0.2);
}

.task-card.dragging {
  opacity: 0.5;
  cursor: grabbing;
}

.task-card .card-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.3;
  word-break: break-word;
}

.task-card .card-assignee {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 3px;
}

/* ===== Unsorted panel ===== */
#panel {
  width: var(--panel-width);
  background: var(--surface);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  transition: width 0.2s ease, opacity 0.2s ease;
  overflow: hidden;
}

#panel.collapsed {
  width: 0;
  opacity: 0;
  pointer-events: none;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.panel-header h2 {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

#panel-toggle {
  position: fixed;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  z-index: 50;
  width: 24px;
  height: 56px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-right: none;
  border-radius: 6px 0 0 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 12px;
  transition: background 0.15s;
}
#panel-toggle:hover { background: var(--surface); color: var(--text); }

/* Unsorted task list */
#unsorted-list {
  flex: 1;
  overflow-y: auto;
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

#unsorted-list::-webkit-scrollbar { width: 4px; }
#unsorted-list::-webkit-scrollbar-track { background: transparent; }
#unsorted-list::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.unsorted-card {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 12px;
  cursor: grab;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.unsorted-card:hover {
  border-color: var(--accent);
  box-shadow: 0 2px 12px rgba(91, 106, 240, 0.15);
}
.unsorted-card.dragging { opacity: 0.4; cursor: grabbing; }
.unsorted-card .card-title { font-size: 12px; font-weight: 600; }
.unsorted-card .card-assignee { font-size: 11px; color: var(--text-muted); margin-top: 3px; }

/* Add task area */
#add-task-area {
  padding: 10px;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

#add-task-form {
  display: none;
  flex-direction: column;
  gap: 7px;
  margin-top: 8px;
}
#add-task-form.visible { display: flex; }

#add-task-form input, #add-task-form textarea {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 12px;
  padding: 7px 10px;
  outline: none;
  resize: none;
  transition: border-color 0.15s;
  font-family: inherit;
}
#add-task-form input:focus, #add-task-form textarea:focus { border-color: var(--accent); }
#add-task-form textarea { height: 56px; }

.form-row { display: flex; gap: 6px; }
.form-row button { flex: 1; padding: 7px 10px; font-size: 12px; }

/* ===== Edit modal ===== */
#modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 11, 18, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  backdrop-filter: blur(2px);
}
#modal-overlay.hidden { display: none; }

.modal-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
  width: 420px;
  max-width: calc(100vw - 32px);
}

.modal-box h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 20px;
}

.modal-field {
  display: flex;
  flex-direction: column;
  gap: 5px;
  margin-bottom: 14px;
}

.modal-field label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.modal-field input, .modal-field textarea {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 13px;
  padding: 8px 12px;
  outline: none;
  resize: vertical;
  transition: border-color 0.15s;
  font-family: inherit;
}
.modal-field input:focus, .modal-field textarea:focus { border-color: var(--accent); }
.modal-field textarea { min-height: 80px; }

.modal-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 20px;
}

/* ===== Confirm modal ===== */
#confirm-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 11, 18, 0.75);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 300;
  backdrop-filter: blur(2px);
}
#confirm-overlay.hidden { display: none; }

.confirm-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
  width: 340px;
  text-align: center;
}
.confirm-box p { color: var(--text-muted); margin: 10px 0 24px; font-size: 13px; }
.confirm-actions { display: flex; gap: 10px; justify-content: center; }

/* ===== Top bar ===== */
#topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: var(--panel-width);
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  z-index: 40;
  pointer-events: none;
}
#topbar .app-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.5px;
  pointer-events: all;
}
#topbar .topbar-right { pointer-events: all; }
#logout-btn {
  font-size: 11px;
  padding: 4px 10px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 5px;
  color: var(--text-muted);
  cursor: pointer;
}
#logout-btn:hover { color: var(--text); border-color: var(--text-muted); }