/* Modern Kanban App Stylesheet with Auth */
@import url('https://fonts.googleapis.com/css2?family=Vazirmatn:wght@300;400;500;600;700;800;900&display=swap');

:root {
  --font-family: 'Vazirmatn', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  
  /* Light Theme */
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #f1f5f9;
  --bg-sidebar: #ffffff;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --border-color: #e2e8f0;
  --glass-bg: rgba(255, 255, 255, 0.75);
  --glass-border: rgba(226, 232, 240, 0.8);
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.06);

  /* Accents */
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-light: #e0e7ff;
  --primary-text: #3730a3;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --info: #06b6d4;

  --priority-urgent: #ef4444;
  --priority-urgent-bg: #fee2e2;
  --priority-high: #f97316;
  --priority-high-bg: #ffedd5;
  --priority-medium: #3b82f6;
  --priority-medium-bg: #dbeafe;
  --priority-low: #10b981;
  --priority-low-bg: #d1fae5;
}

[data-theme="dark"] {
  --bg-primary: #0b0f19;
  --bg-secondary: #111827;
  --bg-card: #1e293b;
  --bg-card-hover: #253347;
  --bg-sidebar: #0f172a;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-light: #64748b;
  --border-color: #1e293b;
  --glass-bg: rgba(17, 24, 39, 0.8);
  --glass-border: rgba(30, 41, 59, 0.8);
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 20px -3px rgba(0, 0, 0, 0.5);
  --shadow-card: 0 4px 12px rgba(0, 0, 0, 0.3);

  --primary: #6366f1;
  --primary-hover: #818cf8;
  --primary-light: #1e1e38;
  --primary-text: #c7d2fe;

  --priority-urgent: #f87171;
  --priority-urgent-bg: rgba(239, 68, 68, 0.18);
  --priority-high: #fb923c;
  --priority-high-bg: rgba(249, 115, 22, 0.18);
  --priority-medium: #60a5fa;
  --priority-medium-bg: rgba(59, 130, 246, 0.18);
  --priority-low: #34d399;
  --priority-low-bg: rgba(16, 185, 129, 0.18);
}

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

body {
  font-family: var(--font-family);
  direction: rtl;
  text-align: right;
  background-color: var(--bg-primary);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* App Header */
.app-header {
  height: 64px;
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 50;
}

.brand-section {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-logo {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--primary) 0%, #ec4899 100%);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 800;
  font-size: 20px;
  box-shadow: 0 4px 10px rgba(99, 102, 241, 0.35);
}

.brand-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand-version {
  font-size: 0.72rem;
  background: var(--primary-light);
  color: var(--primary-text);
  padding: 2px 7px;
  border-radius: 20px;
  font-weight: 600;
}

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

/* User & Auth Header */
.user-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 5px 12px;
  border-radius: 10px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
  cursor: pointer;
}

.user-badge:hover {
  background: var(--bg-card-hover);
}

/* Board Selector */
.board-select-wrapper {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 5px 12px;
  border-radius: 10px;
}

.board-select {
  background: transparent;
  border: none;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
  outline: none;
  cursor: pointer;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 10px;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  text-decoration: none;
}

.btn-primary {
  background: var(--primary);
  color: white;
  box-shadow: 0 2px 8px rgba(79, 70, 229, 0.25);
}

.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.35);
}

.btn-secondary {
  background: var(--bg-secondary);
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--text-light);
}

.btn-icon {
  width: 38px;
  height: 38px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  cursor: pointer;
}

.btn-icon:hover {
  background: var(--bg-card-hover);
  transform: translateY(-1px);
}

/* Sub-header / Filters */
.toolbar-section {
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
}

.search-box {
  position: relative;
  min-width: 260px;
}

.search-input {
  width: 100%;
  padding: 7px 36px 7px 32px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background: var(--bg-primary);
  color: var(--text-main);
  font-family: inherit;
  font-size: 0.85rem;
  outline: none;
  transition: border-color 0.2s;
}

.search-clear-btn {
  position: absolute;
  left: 8px;
  top: 50%;
  transform: translateY(-50%);
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 12px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  transition: color 0.15s, background-color 0.15s;
}

.search-clear-btn:hover {
  color: var(--text-main);
  background: var(--bg-card-hover);
}

.search-input:focus {
  border-color: var(--primary);
}

.search-icon {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 0.85rem;
}

.filter-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.filter-select {
  padding: 7px 10px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background: var(--bg-primary);
  color: var(--text-main);
  font-family: inherit;
  font-size: 0.85rem;
  outline: none;
  cursor: pointer;
}

.stats-badge-row {
  display: flex;
  gap: 12px;
}

.stat-chip {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
}

.stat-chip.urgent {
  color: var(--priority-urgent);
  background: var(--priority-urgent-bg);
  border-color: transparent;
}

/* Kanban Board Canvas */
.board-container {
  flex: 1;
  padding: 20px 24px;
  display: flex;
  gap: 20px;
  overflow-x: auto;
  align-items: flex-start;
}

/* Column */
.kanban-column {
  min-width: 300px;
  max-width: 320px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  display: flex;
  flex-direction: column;
  max-height: calc(100vh - 170px);
  box-shadow: var(--shadow-card);
  transition: transform 0.2s, box-shadow 0.2s;
}

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

.column-title-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
}

.column-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.column-title {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-main);
}

.column-count {
  font-size: 0.75rem;
  font-weight: 700;
  background: var(--bg-primary);
  color: var(--text-muted);
  padding: 2px 7px;
  border-radius: 12px;
}

.column-actions {
  display: flex;
  align-items: center;
  gap: 4px;
}

.column-btn-icon {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.column-btn-icon:hover {
  color: var(--text-main);
  background: var(--bg-card-hover);
}

/* Task List */
.task-list {
  padding: 12px;
  overflow-y: auto;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 80px;
}

.task-list.drag-over {
  background: rgba(99, 102, 241, 0.05);
  border: 2px dashed var(--primary);
  border-radius: 8px;
}

/* Task Card */
.task-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 14px;
  box-shadow: var(--shadow-sm);
  cursor: grab;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
  position: relative;
  user-select: none;
}

.task-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-light);
}

.task-card:active {
  cursor: grabbing;
}

.task-card.is-dragging {
  opacity: 0.75;
  border: 2px dashed var(--primary);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-lg);
  transform: scale(0.98);
}

.task-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 8px;
}

.task-card-header-left {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 1;
  overflow: hidden;
}

.task-drag-handle {
  color: var(--text-muted);
  cursor: grab;
  font-size: 15px;
  line-height: 1;
  opacity: 0.5;
  user-select: none;
  transition: opacity 0.2s, color 0.2s;
  padding: 0 2px;
}

.task-card:hover .task-drag-handle {
  opacity: 1;
  color: var(--primary-light);
}

.task-card-actions {
  display: flex;
  align-items: center;
  gap: 4px;
  opacity: 0.6;
  transition: opacity 0.2s;
}

.task-card:hover .task-card-actions {
  opacity: 1;
}

.task-btn-action {
  background: transparent;
  border: none;
  font-size: 13px;
  padding: 3px 6px;
  border-radius: 6px;
  cursor: pointer;
  color: var(--text-muted);
  transition: background 0.15s, color 0.15s, transform 0.1s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.task-btn-action:hover {
  background: var(--bg-primary);
  color: var(--text-main);
  transform: scale(1.12);
}

.task-btn-action.delete-task-btn:hover {
  color: var(--danger);
  background: rgba(239, 68, 68, 0.1);
}

.task-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 0;
}

.tag-badge {
  font-size: 0.68rem;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 6px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
}

.task-title {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.45;
  margin-bottom: 6px;
}

.task-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.4;
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.task-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.75rem;
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--border-color);
}

.task-priority-badge {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 6px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.task-priority-badge.urgent {
  background: var(--priority-urgent-bg);
  color: var(--priority-urgent);
}
.task-priority-badge.high {
  background: var(--priority-high-bg);
  color: var(--priority-high);
}
.task-priority-badge.medium {
  background: var(--priority-medium-bg);
  color: var(--priority-medium);
}
.task-priority-badge.low {
  background: var(--priority-low-bg);
  color: var(--priority-low);
}

.task-due {
  display: flex;
  align-items: center;
  gap: 4px;
  color: var(--text-muted);
}

.task-due.overdue {
  color: var(--danger);
  font-weight: 700;
}

.task-subtasks-progress {
  display: flex;
  align-items: center;
  gap: 4px;
  color: var(--text-muted);
  font-size: 0.72rem;
}

/* Add Task Button */
.add-task-btn {
  margin: 0 12px 12px 12px;
  padding: 8px;
  background: transparent;
  border: 1px dashed var(--border-color);
  border-radius: 8px;
  color: var(--text-muted);
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: all 0.2s;
}

.add-task-btn:hover {
  background: var(--bg-card-hover);
  color: var(--primary);
  border-color: var(--primary);
}

.add-column-btn {
  min-width: 260px;
  height: 52px;
  background: var(--bg-secondary);
  border: 2px dashed var(--border-color);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s;
}

.add-column-btn:hover {
  background: var(--bg-card-hover);
  color: var(--primary);
  border-color: var(--primary);
}

/* Modals */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
  padding: 16px;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-box {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  width: 100%;
  max-width: 520px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-lg);
  transform: translateY(20px) scale(0.97);
  transition: transform 0.2s ease;
}

.modal-overlay.active .modal-box {
  transform: translateY(0) scale(1);
}

.modal-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
}

.modal-close {
  background: transparent;
  border: none;
  font-size: 1.2rem;
  color: var(--text-muted);
  cursor: pointer;
}

.modal-body {
  padding: 20px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
}

.form-input, .form-textarea, .form-select {
  padding: 9px 12px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background: var(--bg-primary);
  color: var(--text-main);
  font-family: inherit;
  font-size: 0.85rem;
  outline: none;
  transition: border-color 0.2s;
}

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

.form-textarea {
  min-height: 80px;
  resize: vertical;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.modal-footer {
  padding: 14px 20px;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
}

/* Subtasks in Modal */
.subtasks-list-modal {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 6px;
}

.subtask-item-modal {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 10px;
  background: var(--bg-primary);
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

.subtask-checkbox-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
}

.subtask-checkbox-wrap.completed span {
  text-decoration: line-through;
  color: var(--text-light);
}

/* Dedicated Fullscreen Login Screen */
.login-screen-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg-primary);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.login-screen-overlay:not(.active) {
  display: none !important;
}

.login-screen-overlay.active {
  opacity: 1;
  visibility: visible;
}

.login-card {
  width: 100%;
  max-width: 400px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 32px 28px;
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  gap: 20px;
  text-align: center;
}

.login-icon-wrap {
  width: 64px;
  height: 64px;
  margin: 0 auto;
  background: linear-gradient(135deg, var(--primary) 0%, #ec4899 100%);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  color: white;
  box-shadow: 0 8px 20px rgba(99, 102, 241, 0.4);
}

.login-title {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--text-main);
}

.login-subtitle {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
  text-align: right;
}

.login-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
  background: var(--bg-primary);
  padding: 8px 12px;
  border-radius: 8px;
  border: 1px dashed var(--border-color);
  margin-top: 4px;
}

/* Toast */
.toast-container {
  position: fixed;
  bottom: 24px;
  left: 24px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toast {
  background: var(--bg-secondary);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  padding: 12px 18px;
  border-radius: 10px;
  box-shadow: var(--shadow-lg);
  font-size: 0.85rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  animation: slideIn 0.3s ease;
}

@keyframes slideIn {
  from {
    transform: translateY(20px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@media (max-width: 768px) {
  .app-header {
    padding: 0 12px;
  }
  .toolbar-section {
    padding: 10px 12px;
  }
  .board-container {
    padding: 12px;
  }
  .kanban-column {
    min-width: 270px;
  }
}