/* ====================================================
   Kanban web app · hoja de estilos
   ==================================================== */
:root {
  --bg: #0f1115;
  --bg-elev: #171a21;
  --bg-elev-2: #1f232c;
  --sidebar-bg: #131620;
  --border: #2a2f3a;
  --border-soft: #232834;
  --text: #e7e9ee;
  --text-dim: #9aa3b2;
  --text-mute: #6b7384;
  --primary: #6c8cff;
  --primary-dim: #4a6aef;
  --danger: #ff6b6b;
  --success: #4ade80;
  --warning: #fbbf24;

  --col-todo: #9aa3b2;
  --col-progress: #6c8cff;
  --col-review: #fbbf24;
  --col-done: #4ade80;

  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  overflow: hidden;
}

body { display: flex; }

.hidden { display: none !important; }

/* ====================================================
   Sidebar
   ==================================================== */
#sidebar {
  width: 260px;
  flex-shrink: 0;
  background: var(--sidebar-bg);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  height: 100vh;
}

.sidebar-header {
  padding: 18px 18px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-soft);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-mark {
  color: var(--primary);
  font-size: 20px;
  line-height: 1;
}

.brand-text {
  font-weight: 700;
  font-size: 17px;
  letter-spacing: 0.2px;
}

.badge {
  font-size: 10px;
  padding: 3px 8px;
  border-radius: 20px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.badge-connected {
  background: rgba(74, 222, 128, 0.15);
  color: var(--success);
}

.badge-fallback {
  background: rgba(251, 191, 36, 0.15);
  color: var(--warning);
}

.sidebar-section {
  padding: 16px 12px;
  flex: 1;
  overflow-y: auto;
}

.section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 6px 10px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--text-mute);
}

.icon-btn {
  background: transparent;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 16px;
  width: 22px;
  height: 22px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
}

.icon-btn:hover {
  background: var(--bg-elev-2);
  color: var(--text);
}

.project-list { list-style: none; }

.project-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--text-dim);
  margin-bottom: 2px;
  transition: all 0.15s;
  font-weight: 500;
}

.project-item:hover {
  background: var(--bg-elev);
  color: var(--text);
}

.project-item.active {
  background: var(--bg-elev-2);
  color: var(--text);
  box-shadow: inset 3px 0 0 var(--primary);
}

.project-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-mute);
  flex-shrink: 0;
}

.project-item.active .project-dot { background: var(--primary); }

.project-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sidebar-footer {
  padding: 12px 18px;
  border-top: 1px solid var(--border-soft);
  font-size: 12px;
  color: var(--text-mute);
}

/* ====================================================
   Main
   ==================================================== */
#main {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

#board-header {
  padding: 22px 28px 16px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  border-bottom: 1px solid var(--border-soft);
  flex-shrink: 0;
}

#board-title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 4px;
}

.board-desc {
  color: var(--text-dim);
  font-size: 13px;
}

.board-actions {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

/* ====================================================
   Board
   ==================================================== */
.board {
  flex: 1;
  display: flex;
  gap: 16px;
  padding: 20px 28px;
  overflow-x: auto;
  align-items: flex-start;
}

.column {
  width: 290px;
  flex-shrink: 0;
  background: var(--bg-elev);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  max-height: calc(100vh - 160px);
}

.column-header {
  padding: 14px 14px 10px;
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid var(--border-soft);
}

.column-color {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.column-name {
  font-weight: 600;
  font-size: 13px;
  flex: 1;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.column-count {
  font-size: 11px;
  color: var(--text-mute);
  background: var(--bg-elev-2);
  padding: 2px 8px;
  border-radius: 20px;
}

.column-add {
  background: transparent;
  border: none;
  color: var(--text-mute);
  cursor: pointer;
  font-size: 18px;
  width: 22px;
  height: 22px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.column-add:hover {
  background: var(--bg-elev-2);
  color: var(--text);
}

.column-edit,
.column-delete {
  background: transparent;
  border: none;
  color: var(--text-mute);
  cursor: pointer;
  font-size: 13px;
  width: 22px;
  height: 22px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.15s, color 0.15s, background 0.15s;
}

.column-header:hover .column-edit,
.column-header:hover .column-delete {
  opacity: 1;
}

.column-edit:hover {
  background: var(--bg-elev-2);
  color: var(--primary);
}

.column-delete:hover {
  background: rgba(255, 107, 107, 0.12);
  color: var(--danger);
}

/* ----- Botón "Añadir columna" ----- */
.column-add-new {
  width: 290px;
  flex-shrink: 0;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 14px;
}

.add-column-btn {
  width: 100%;
  padding: 14px;
  background: transparent;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  color: var(--text-mute);
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  font-family: inherit;
  transition: all 0.15s;
}

.add-column-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(108, 140, 255, 0.05);
}

/* ----- Selector de color en modal de columna ----- */
.color-picker {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 4px;
}

.color-swatch {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.12s, border-color 0.12s;
}

.color-swatch:hover {
  transform: scale(1.12);
}

.color-swatch.selected {
  border-color: white;
  transform: scale(1.12);
}

.task-list {
  padding: 10px;
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 60px;
  transition: background 0.15s;
}

.task-list.drag-over {
  background: rgba(108, 140, 255, 0.06);
}

.column-empty {
  padding: 16px;
  text-align: center;
  color: var(--text-mute);
  font-size: 12px;
  border: 1px dashed var(--border);
  border-radius: var(--radius-sm);
  margin: 4px;
}

/* ====================================================
   Cards
   ==================================================== */
.card {
  background: var(--bg-elev-2);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  padding: 12px;
  cursor: grab;
  transition: all 0.15s;
  position: relative;
}

.card:hover {
  border-color: var(--border);
  transform: translateY(-1px);
}

.card.dragging {
  opacity: 0.4;
  cursor: grabbing;
}

.card-title {
  font-weight: 500;
  margin-bottom: 8px;
  word-break: break-word;
  padding-right: 18px;
}

.card-desc {
  color: var(--text-dim);
  font-size: 12px;
  margin-bottom: 10px;
  word-break: break-word;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.priority {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  padding: 2px 7px;
  border-radius: 20px;
}

.priority-low { background: rgba(154, 163, 178, 0.15); color: var(--text-dim); }
.priority-medium { background: rgba(108, 140, 255, 0.15); color: var(--primary); }
.priority-high { background: rgba(251, 191, 36, 0.15); color: var(--warning); }
.priority-urgent { background: rgba(255, 107, 107, 0.15); color: var(--danger); }

.card-delete {
  position: absolute;
  top: 8px;
  right: 8px;
  background: transparent;
  border: none;
  color: var(--text-mute);
  cursor: pointer;
  font-size: 14px;
  opacity: 0;
  transition: opacity 0.15s;
}

.card:hover .card-delete { opacity: 1; }
.card-delete:hover { color: var(--danger); }

/* ====================================================
   Botones
   ==================================================== */
.btn {
  border: none;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.15s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.btn-primary {
  background: var(--primary);
  color: white;
}
.btn-primary:hover { background: var(--primary-dim); }

.btn-ghost {
  background: var(--bg-elev-2);
  color: var(--text-dim);
  border: 1px solid var(--border-soft);
}
.btn-ghost:hover { color: var(--text); border-color: var(--border); }

.btn-danger-ghost {
  background: transparent;
  color: var(--danger);
  border: 1px solid rgba(255, 107, 107, 0.3);
}
.btn-danger-ghost:hover { background: rgba(255, 107, 107, 0.1); }

/* ====================================================
   Modal
   ==================================================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  backdrop-filter: blur(2px);
}

.modal {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  width: 90%;
  max-width: 420px;
  box-shadow: var(--shadow);
}

.modal h3 {
  margin-bottom: 18px;
  font-size: 17px;
}

.modal-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 20px;
}

.form-field { display: flex; flex-direction: column; gap: 5px; }

.form-field label {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-dim);
}

.form-field input,
.form-field textarea,
.form-field select {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 9px 11px;
  color: var(--text);
  font-family: inherit;
  font-size: 13px;
  outline: none;
  transition: border-color 0.15s;
}

.form-field input:focus,
.form-field textarea:focus,
.form-field select:focus {
  border-color: var(--primary);
}

.form-field textarea {
  resize: vertical;
  min-height: 70px;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

/* ====================================================
   Empty state
   ==================================================== */
.empty-state {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px;
}

.empty-icon { font-size: 48px; margin-bottom: 16px; opacity: 0.7; }
.empty-state h2 { font-size: 20px; margin-bottom: 8px; }
.empty-state p { color: var(--text-dim); margin-bottom: 20px; }

/* ====================================================
   Toast
   ==================================================== */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 11px 20px;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
  z-index: 200;
  font-size: 13px;
  animation: toastIn 0.2s ease;
}

.toast.error { border-color: var(--danger); color: var(--danger); }
.toast.success { border-color: var(--success); color: var(--success); }

@keyframes toastIn {
  from { opacity: 0; transform: translateX(-50%) translateY(8px); }
  to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* ====================================================
   Scrollbar
   ==================================================== */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover { background: var(--text-mute); }

/* ====================================================
   Responsive
   ==================================================== */
@media (max-width: 768px) {
  #sidebar { width: 200px; }
  .board { padding: 14px; }
  #board-header { padding: 16px; flex-direction: column; align-items: flex-start; }
  .column { width: 260px; }
}

/* ====================================================
   Auth Screen
   ==================================================== */
.auth-screen {
  position: fixed;
  inset: 0;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 300;
}

.auth-card {
  text-align: center;
  padding: 48px 40px;
}

.auth-icon {
  font-size: 40px;
  color: var(--primary);
  margin-bottom: 16px;
}

.auth-card h1 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 8px;
}

.auth-card p {
  color: var(--text-dim);
  margin-bottom: 28px;
  font-size: 14px;
}

.btn-login {
  padding: 12px 24px;
  font-size: 14px;
  border-radius: var(--radius);
  gap: 8px;
}

/* ====================================================
   Sidebar User Block
   ==================================================== */
.sidebar-user {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  border-top: 1px solid var(--border-soft);
  background: var(--bg);
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--primary-dim);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  flex-shrink: 0;
}

.user-email {
  flex: 1;
  font-size: 12px;
  color: var(--text-dim);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.btn-logout {
  font-size: 11px;
  padding: 4px 10px;
  color: var(--text-mute);
  border: 1px solid var(--border-soft);
  background: transparent;
}
.btn-logout:hover {
  color: var(--danger);
  border-color: rgba(255, 107, 107, 0.3);
}