/* ============================================
   KANBAN BOARD - STYLESHEET
   Colours matched to Figma reference design.
   ============================================ */

/* --- CSS Variables (Design Tokens) --- */
:root {
  /* Light mode colours */
  --bg-main: #F4F7FD;
  --bg-card: #FFFFFF;
  --bg-sidebar: #FFFFFF;
  --text-primary: #000112;
  --text-secondary: #828FA3;
  --border-color: #E4EBFA;
  --primary: #635FC7;
  --primary-hover: #A8A4FF;
  --destructive: #EA5555;
  --destructive-hover: #FF9898;
}

.dark {
  /* Dark mode colours */
  --bg-main: #20212C;
  --bg-card: #2B2C37;
  --bg-sidebar: #2B2C37;
  --text-primary: #FFFFFF;
  --text-secondary: #828FA3;
  --border-color: #3E3F4E;
  --primary: #635FC7;
  --primary-hover: #A8A4FF;
  --destructive: #EA5555;
  --destructive-hover: #FF9898;
}

/* --- Reset & Base --- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Plus Jakarta Sans', sans-serif;
  background-color: var(--bg-main);
  color: var(--text-primary);
  display: flex;
  height: 100vh;
  overflow: hidden;
  transition: background-color 0.3s, color 0.3s;
}

button {
  cursor: pointer;
  border: none;
  font-family: inherit;
}

/* --- Utility --- */
.hidden {
  display: none !important;
}

/* ============================================
   SIDEBAR
   ============================================ */
.sidebar {
  width: 260px;
  min-width: 260px;
  height: 100vh;
  background-color: var(--bg-card);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  transition: width 0.3s, min-width 0.3s, transform 0.3s;
  z-index: 50;
}

.sidebar.collapsed {
  width: 0;
  min-width: 0;
  overflow: hidden;
}

.sidebar-inner {
  display: flex;
  flex-direction: column;
  height: 100%;
  min-width: 260px;
}

/* Logo */
.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 32px 24px 24px;
}

.logo-bars {
  display: flex;
  gap: 3px;
}

.logo-bars .bar {
  width: 6px;
  height: 25px;
  border-radius: 100px;
  background-color: var(--primary);
}

.logo-bars .bar-mid { opacity: 0.75; }
.logo-bars .bar-light { opacity: 0.5; }

.logo-bars.small .bar {
  width: 4px;
  height: 20px;
}

.logo-text {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--text-primary);
}

/* Board list */
.sidebar-boards {
  flex: 1;
  padding-right: 20px;
}

.boards-heading {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 2.4px;
  color: var(--text-secondary);
  padding: 0 24px;
  margin-bottom: 16px;
}

.board-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 24px;
  border-radius: 0 100px 100px 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--text-secondary);
  transition: background-color 0.2s, color 0.2s;
}

.board-item.active {
  background-color: var(--primary);
  color: #FFFFFF;
}

.board-icon { width: 16px; height: 16px; }

/* Sidebar bottom */
.sidebar-bottom {
  padding: 12px 12px 32px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* Theme toggle */
.theme-toggle-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  background-color: var(--bg-main);
  border-radius: 6px;
  padding: 14px;
}

.theme-icon {
  font-size: 16px;
}

.theme-toggle {
  position: relative;
  width: 40px;
  height: 20px;
  border-radius: 100px;
  background-color: var(--primary);
  transition: background-color 0.2s;
}

.theme-toggle:hover {
  background-color: var(--primary-hover);
}

.toggle-knob {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background-color: #FFFFFF;
  transition: left 0.2s;
}

.dark .toggle-knob {
  left: 23px;
}

/* Hide sidebar button */
.hide-sidebar-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 24px;
  border-radius: 0 100px 100px 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--text-secondary);
  background: none;
  transition: background-color 0.2s, color 0.2s;
}

.hide-sidebar-btn:hover {
  background-color: var(--bg-main);
  color: var(--text-primary);
}

/* Show sidebar button (floating) */
.show-sidebar-btn {
  position: fixed;
  bottom: 32px;
  left: 0;
  width: 56px;
  height: 48px;
  border-radius: 0 100px 100px 0;
  background-color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
  transition: background-color 0.2s;
}

.show-sidebar-btn:hover {
  background-color: var(--primary-hover);
}

/* ============================================
   MAIN CONTENT
   ============================================ */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  transition: margin-left 0.3s;
}

/* Header */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
  padding: 0 24px;
  background-color: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.mobile-menu-btn {
  display: none;
  align-items: center;
  gap: 8px;
  background: none;
}

.chevron {
  margin-left: 4px;
}

.board-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
}

.add-task-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 24px;
  border-radius: 100px;
  background-color: var(--primary);
  color: #FFFFFF;
  font-size: 15px;
  font-weight: 700;
  transition: background-color 0.2s;
}

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

.plus {
  font-size: 18px;
  font-weight: 700;
}

/* Board */
.board {
  flex: 1;
  display: flex;
  gap: 24px;
  padding: 24px;
  overflow-x: auto;
  overflow-y: hidden;
}

/* Loading & Error states */
.loading, .error {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  gap: 16px;
  color: var(--text-secondary);
  font-size: 14px;
}

.retry-btn {
  padding: 10px 20px;
  border-radius: 100px;
  background-color: var(--primary);
  color: #FFFFFF;
  font-size: 13px;
  font-weight: 700;
}

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

/* ============================================
   COLUMNS
   ============================================ */
.column {
  min-width: 280px;
  width: 280px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
}

.column-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
  padding: 0 4px;
}

.column-dot {
  width: 15px;
  height: 15px;
  border-radius: 50%;
}

.column-dot.todo { background-color: #49C4E5; }
.column-dot.doing { background-color: #8471F2; }
.column-dot.done { background-color: #67E2AE; }

.column-title {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 2.4px;
  color: var(--text-secondary);
}

.column-tasks {
  display: flex;
  flex-direction: column;
  gap: 20px;
  flex: 1;
  overflow-y: auto;
  max-height: calc(100vh - 180px);
  padding-right: 4px;
}

.empty-column {
  border: 2px dashed var(--border-color);
  border-radius: 6px;
  padding: 40px 0;
  text-align: center;
  font-size: 13px;
  color: var(--text-secondary);
}

/* ============================================
   TASK CARDS
   ============================================ */
.task-card {
  background-color: var(--bg-card);
  border-radius: 8px;
  padding: 20px 16px;
  box-shadow: 0 4px 6px rgba(54, 78, 126, 0.1);
  cursor: pointer;
  transition: color 0.2s;
}

.task-card:hover .task-title {
  color: var(--primary);
}

.task-title {
  font-size: 15px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-primary);
  transition: color 0.2s;
}

.task-desc {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-top: 6px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.task-priority {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 10px;
}

.priority-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.priority-dot.high { background-color: #EA5555; }
.priority-dot.medium { background-color: #F5A623; }
.priority-dot.low { background-color: #67E2AE; }

.priority-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-secondary);
}

/* ============================================
   MODAL
   ============================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 60;
  padding: 16px;
}

.modal {
  width: 100%;
  max-width: 480px;
  background-color: var(--bg-card);
  border-radius: 6px;
  padding: 24px 32px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.25);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.modal-header h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
}

.modal-close {
  font-size: 24px;
  background: none;
  color: var(--text-secondary);
  transition: color 0.2s;
}

.modal-close:hover { color: var(--text-primary); }

.modal-body { display: flex; flex-direction: column; gap: 20px; }

.field-label {
  display: block;
  font-size: 12px;
  font-weight: 700;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.field-input {
  width: 100%;
  padding: 8px 16px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background: transparent;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 13px;
  outline: none;
  transition: border-color 0.2s;
}

.field-input:focus { border-color: var(--primary); }
.field-textarea { resize: none; }

.modal-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
}

.delete-btn {
  padding: 10px 16px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 700;
  color: var(--destructive);
  background: none;
  transition: background-color 0.2s;
}

.delete-btn:hover { background-color: rgba(234, 85, 85, 0.1); }

.delete-btn.confirm {
  background-color: var(--destructive);
  color: #FFFFFF;
}

.save-btn {
  padding: 10px 24px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 700;
  background-color: var(--primary);
  color: #FFFFFF;
  transition: background-color 0.2s;
}

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

/* ============================================
   RESPONSIVE - MOBILE
   ============================================ */
@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    transform: translateX(-100%);
    z-index: 100;
  }

  .sidebar.open {
    transform: translateX(0);
    width: 260px;
    min-width: 260px;
  }

  .sidebar.collapsed {
    transform: translateX(-100%);
  }

  .mobile-menu-btn { display: flex; }
  .board-title { display: none; }
  .btn-text { display: none; }
  .show-sidebar-btn { display: none !important; }

  .header { height: 64px; }

  .add-task-btn {
    padding: 10px 18px;
    font-size: 18px;
  }

  /* Mobile overlay */
  .mobile-overlay {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 99;
  }
}

/* Scrollbar */
.column-tasks::-webkit-scrollbar { width: 6px; }
.column-tasks::-webkit-scrollbar-track { background: transparent; }
.column-tasks::-webkit-scrollbar-thumb {
  background-color: rgba(130, 143, 163, 0.3);
  border-radius: 100px;
}
/* Add this if not present to hide modals */
.hidden {
  display: none !important;
}