:root {
  --bg: #0a0e1a;
  --surface: #111827;
  --surface2: #1a2235;
  --border: #1e2d45;
  --accent: #00d4ff;
  --accent2: #ff6b35;
  --accent3: #a855f7;
  --green: #22c55e;
  --yellow: #f59e0b;
  --red: #ef4444;
  --text: #e2e8f0;
  --text-muted: #64748b;
  --text-dim: #94a3b8;
  --mono: 'Space Mono', monospace;
  --sans: 'Be Vietnam Pro', sans-serif;

  /* Responsive Font Sizes */
  --fs-xs: clamp(0.6rem, 0.5vw + 0.5rem, 0.68rem);
  --fs-sm: clamp(0.7rem, 0.6vw + 0.6rem, 0.78rem);
  --fs-md: clamp(0.8rem, 0.8vw + 0.7rem, 0.9rem);
  --fs-lg: clamp(1rem, 1vw + 0.8rem, 1.2rem);
  --fs-xl: clamp(1.8rem, 3vw + 1rem, 2.8rem);
  /* For KPI large numbers */
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  min-height: 100vh;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(ellipse 60% 40% at 10% 5%, rgba(0, 212, 255, 0.06) 0%, transparent 60%),
    radial-gradient(ellipse 50% 30% at 90% 90%, rgba(168, 85, 247, 0.05) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
}

/* HEADER */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 14, 26, 0.9);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.logo {
  font-family: var(--mono);
  font-size: var(--fs-sm);
  color: var(--accent);
  letter-spacing: 0.15em;
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 2s infinite;
}

@keyframes pulse {

  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }

  50% {
    opacity: 0.4;
    transform: scale(0.7);
  }
}

.header-right {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-family: var(--mono);
  font-size: var(--fs-sm);
  color: var(--text-muted);
}

#clock {
  color: var(--accent);
}

.refresh-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 6px 14px;
  border-radius: 6px;
  cursor: pointer;
  font-family: var(--mono);
  font-size: var(--fs-xs);
  transition: all 0.2s;
}

.refresh-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.refresh-btn svg {
  transition: transform 0.4s;
}

.refresh-btn.loading svg {
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* MAIN */
main {
  position: relative;
  z-index: 1;
  padding: 1.5rem 2rem 3rem;
  max-width: 100%;
  margin: 0 auto;
}

/* SECTION TITLE */
.section-label {
  font-family: var(--mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.2em;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 0.75rem;
  padding-left: 2px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.section-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--border), transparent);
}

/* KPI GRID */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1rem;
  margin-bottom: 2rem;
}

.kpi-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
  position: relative;
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
}

.kpi-card:hover {
  transform: translateY(-2px);
  border-color: var(--card-accent, var(--accent));
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4), 0 0 0 1px var(--card-accent, var(--accent)) inset;
}

.kpi-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--card-accent, var(--accent));
}

.kpi-card::after {
  content: '';
  position: absolute;
  top: -30%;
  right: -10%;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--card-accent, var(--accent)) 0%, transparent 70%);
  opacity: 0.06;
  pointer-events: none;
}

.kpi-label {
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  margin-bottom: 0.6rem;
  text-transform: uppercase;
}

.kpi-value {
  font-family: var(--mono);
  font-size: var(--fs-xl);
  font-weight: 700;
  line-height: 1;
  color: var(--card-accent, var(--accent));
}

.kpi-sub {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 0.4rem;
}

.kpi-loading {
  width: 40px;
  height: 12px;
  background: linear-gradient(90deg, var(--surface2) 25%, var(--border) 50%, var(--surface2) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.2s infinite;
  border-radius: 4px;
}

@keyframes shimmer {
  0% {
    background-position: 200% 0;
  }

  100% {
    background-position: -200% 0;
  }
}

/* BOTTOM GRID */
.bottom-grid {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 1.5rem;
}

/* PERSONNEL TABLE */
.table-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

.table-header {
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.table-title {
  font-size: var(--fs-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  white-space: nowrap;
  flex-shrink: 0;
}

.table-badge {
  font-family: var(--mono);
  font-size: var(--fs-xs);
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 2px 8px;
  border-radius: 20px;
}

.dept-select {
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-family: var(--sans);
  font-size: 0.7rem;
  font-weight: 500;
  padding: 4px 8px;
  border-radius: 6px;
  cursor: pointer;
  outline: none;
  transition: all 0.2s;
}

.dept-select:hover,
.dept-select:focus {
  border-color: var(--accent);
  color: var(--accent);
}

.dept-select option {
  background: var(--surface);
  color: var(--text);
}

.personnel-list {
  overflow-y: auto;
  max-height: 480px;
}

.personnel-list::-webkit-scrollbar {
  width: 4px;
}

.personnel-list::-webkit-scrollbar-track {
  background: transparent;
}

.personnel-list::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 2px;
}

.person-row {
  display: grid;
  grid-template-columns: 1fr 40px 40px 40px 40px 40px;
  align-items: center;
  padding: 0.65rem 1.5rem;
  border-bottom: 1px solid rgba(30, 45, 69, 0.5);
  gap: 0.5rem;
  cursor: pointer;
  transition: background 0.15s;
}

.person-row:hover {
  background: var(--surface2);
}

.person-row:last-child {
  border-bottom: none;
}

.person-name {
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--text-dim);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.person-stat {
  text-align: center;
  font-family: var(--mono);
  font-size: var(--fs-sm);
  font-weight: 700;
}

.stat-pending {
  color: var(--yellow);
}

.stat-doing {
  color: var(--accent);
}

.stat-review {
  color: var(--accent3);
}

.stat-priority {
  color: var(--red);
}

.person-row-head {
  grid-template-columns: 1fr 40px 40px 40px 40px 40px;
  padding: 0.5rem 1.5rem;
  background: var(--surface2);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 1;
}

.col-head {
  text-align: center;
  font-family: var(--mono);
  font-size: var(--fs-xs);
  color: var(--text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.col-head:first-child {
  text-align: left;
}

/* TASK DETAIL PANEL */
.detail-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.detail-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  padding: 0 1.5rem;
  gap: 0;
  overflow-x: auto;
  scrollbar-width: none;
  /* Firefox */
  -ms-overflow-style: none;
  /* IE */
  white-space: nowrap;
}

.detail-tabs::-webkit-scrollbar {
  display: none;
  /* Chrome, Safari, Opera */
}

.tab-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-family: var(--sans);
  font-size: var(--fs-sm);
  font-weight: 600;
  padding: 0.75rem 1rem;
  position: relative;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  transition: color 0.2s;
  white-space: nowrap;
  flex-shrink: 0;
}

.tab-btn::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transition: transform 0.2s;
}

.tab-btn.active {
  color: var(--accent);
}

.tab-btn.active::after {
  transform: scaleX(1);
}

.detail-body {
  flex: 1;
  overflow-y: auto;
  padding: 1rem 1.5rem;
  max-height: 480px;
}

.detail-body::-webkit-scrollbar {
  width: 4px;
}

.detail-body::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 2px;
}

/* TASK LIST */
.task-item {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.85rem 1rem;
  margin-bottom: 0.6rem;
  transition: border-color 0.15s;
  cursor: pointer;
}

.task-item:hover {
  border-color: var(--accent);
}

.task-title {
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--text);
  margin-bottom: 0.4rem;
  line-height: 1.4;
}

.task-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.4rem;
}

.task-tag {
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 2px 8px;
  border-radius: 4px;
  border: 1px solid;
}

.tag-pending {
  color: var(--yellow);
  border-color: rgba(245, 158, 11, 0.3);
  background: rgba(245, 158, 11, 0.08);
}

.tag-doing {
  color: var(--accent);
  border-color: rgba(0, 212, 255, 0.3);
  background: rgba(0, 212, 255, 0.08);
}

.tag-review {
  color: var(--accent3);
  border-color: rgba(168, 85, 247, 0.3);
  background: rgba(168, 85, 247, 0.08);
}

.tag-completed {
  color: var(--green);
  border-color: rgba(34, 197, 94, 0.3);
  background: rgba(34, 197, 94, 0.08);
}

.tag-priority {
  color: var(--red);
  border-color: rgba(239, 68, 68, 0.3);
  background: rgba(239, 68, 68, 0.08);
}

.task-assignee {
  font-size: var(--fs-xs);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 4px;
}

.task-tag.active-filter {
  box-shadow: 0 0 0 2px var(--surface), 0 0 0 4px currentColor;
  transform: scale(1.05);
}

.task-tag:hover {
  filter: brightness(1.2);
}

.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-muted);
  font-size: var(--fs-sm);
}

.empty-state svg {
  opacity: 0.2;
  margin-bottom: 0.5rem;
}

/* MODAL */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 999;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: all;
}

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  width: 100%;
  max-width: 680px;
  max-height: 85vh;
  overflow-y: auto;
  transform: translateY(16px);
  transition: transform 0.2s;
}

.modal-overlay.open .modal {
  transform: translateY(0);
}

.modal::-webkit-scrollbar {
  width: 4px;
}

.modal::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 2px;
}

.modal-header {
  padding: 1.5rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
}

.modal-title {
  font-size: var(--fs-lg);
  font-weight: 700;
  line-height: 1.4;
  color: var(--text);
}

.modal-close {
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text-muted);
  width: 32px;
  height: 32px;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.2s;
}

.modal-close:hover {
  border-color: var(--red);
  color: var(--red);
}

.modal-body {
  padding: 1.5rem;
}

.modal-field {
  margin-bottom: 1rem;
}

.modal-field-label {
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.3rem;
}

.modal-field-value {
  font-size: var(--fs-sm);
  color: var(--text-dim);
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.6rem 0.85rem;
  line-height: 1.5;
}

/* TOAST */
.toast {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 9999;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.75rem 1.2rem;
  font-size: var(--fs-sm);
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 8px;
  transform: translateY(10px);
  opacity: 0;
  transition: all 0.3s;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

.toast-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

/* Loading skeleton */
.skel {
  background: linear-gradient(90deg, var(--surface2) 25%, var(--border) 50%, var(--surface2) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.2s infinite;
  border-radius: 6px;
}

@media (max-width: 1200px) {
  .kpi-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .bottom-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 700px) {
  main {
    padding: 1rem;
  }

  .kpi-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  /* Task Tabs Grid for Mobile (3 per row) */
  .detail-tabs {
    flex-wrap: wrap;
    padding: 0;
    overflow-x: visible;
  }

  .tab-btn {
    flex: 1 1 33.33%;
    font-size: 0.65rem;
    padding: 0.75rem 0.5rem;
    text-align: center;
    border-bottom: 1px solid var(--border);
  }

  .tab-btn.active::after {
    bottom: -1px;
  }

  /* Hide the "Chi tiết Tasks" title on mobile */
  .detail-card .table-title {
    display: none;
  }

  /* Hide logo dot on mobile */
  .logo-dot {
    display: none;
  }

  .logo {
    display: none;
  }

  /* Shrink project dropdown on mobile */
  #projectSelect {
    font-size: 0.65rem;
    padding: 3px 6px;
    height: 28px;
  }

  #projectSelect {
    width: 200px;
    /* chỉnh nhỏ lại theo ý */
  }
}

/* SETUP MODAL */
.setup-modal {
  max-width: 520px;
}

.setup-field {
  margin-bottom: 1.25rem;
}

.setup-label {
  display: block;
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}

.setup-required {
  color: var(--red);
}

.setup-input {
  width: 100%;
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: var(--mono);
  font-size: var(--fs-sm);
  padding: 0.65rem 0.85rem;
  border-radius: 8px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.setup-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.setup-input::placeholder {
  color: var(--text-muted);
  opacity: 0.5;
}

.setup-hint {
  font-size: 0.65rem;
  color: var(--text-muted);
  margin-top: 0.3rem;
  line-height: 1.4;
}

.setup-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 0.6rem 1.2rem;
  border-radius: 8px;
  font-family: var(--mono);
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  border: 1px solid var(--border);
  transition: all 0.2s;
}

.setup-btn-primary {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
  flex: 1;
}

.setup-btn-primary:hover {
  background: #33ddff;
  box-shadow: 0 4px 20px rgba(0, 212, 255, 0.3);
}

.setup-btn-danger {
  background: transparent;
  color: var(--red);
  border-color: rgba(239, 68, 68, 0.3);
}

.setup-btn-danger:hover {
  background: rgba(239, 68, 68, 0.1);
  border-color: var(--red);
}

/* PERSON AVATAR */
.person-avatar {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  margin-right: 8px;
  vertical-align: middle;
  border: 1px solid var(--border);
}

.person-name {
  display: flex;
  align-items: center;
}

/* TASK KEY BADGE */
.task-key {
  font-family: var(--mono);
  font-size: 0.6rem;
  color: var(--accent);
  background: rgba(0, 212, 255, 0.08);
  border: 1px solid rgba(0, 212, 255, 0.2);
  padding: 1px 6px;
  border-radius: 3px;
  white-space: nowrap;
  flex-shrink: 0;
}
.dropdown-content {
  display: none;
  position: absolute;
  /* Dark theme matching */
  background-color: var(--surface);
  color: var(--text);
  min-width: 250px;
  max-width: 350px;
  box-shadow: 0px 8px 24px rgba(0,0,0,0.5);
  z-index: 1000;
  max-height: 400px;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px;
  top: 40px;
  left: 0;
}
.dropdown-content.show { display: block; }

.dropdown-content label { 
  display: flex; 
  align-items: center; 
  gap: 10px; 
  padding: 8px 10px; 
  cursor: pointer; 
  font-size: 13px; 
  color: var(--text); 
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  border-radius: 6px;
  transition: all 0.2s ease;
}

.dropdown-content label:hover { 
  background-color: var(--surface2); 
  color: #fff;
}

.dropdown-content input[type="checkbox"] {
  cursor: pointer;
  width: 16px;
  height: 16px;
  accent-color: var(--accent); /* Makes native checkbox match theme */
  flex-shrink: 0;
}