/* ========================================================
   VOCAB SHEET STUDIO - STYLESHEET
   Style hiện đại, clean chuẩn ứng dụng Excel/Dashboard
   ======================================================== */

:root {
  --primary: #107c41;       /* Excel Green */
  --primary-hover: #0b5a30;
  --primary-light: #e8f5e9;
  --bg-main: #f3f4f6;
  --bg-toolbar: #1e293b;
  --text-toolbar: #f8fafc;
  --border-color: #cbd5e1;
  --cell-selected: #e2f0cb;
  --cell-highlight: rgba(16, 124, 65, 0.12);
  --success-bg: #dcfce7;
  --success-text: #166534;
  --danger-bg: #fee2e2;
  --danger-text: #991b1b;
}

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

body {
  font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, sans-serif;
  font-size: 13px;
  background-color: var(--bg-main);
  color: #1e293b;
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

/* 1. RIBBON TOOLBAR */
#toolbar {
  background-color: var(--bg-toolbar);
  color: var(--text-toolbar);
  padding: 8px 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.15);
  z-index: 10;
}

.tool-group {
  background: #334155;
  border-radius: 6px;
  padding: 6px 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.group-title {
  font-size: 10.5px;
  font-weight: 700;
  color: #94a3b8;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.group-content {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

/* Nút bấm */
button, .btn {
  font-family: inherit;
  font-size: 12px;
  font-weight: 500;
  border: 1px solid transparent;
  border-radius: 4px;
  padding: 5px 10px;
  cursor: pointer;
  background: #f8fafc;
  color: #0f172a;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: all 0.15s ease;
  user-select: none;
}

button:hover {
  background: #e2e8f0;
}

button:active {
  transform: translateY(1px);
}

.btn-primary {
  background: #2563eb;
  color: #fff;
  font-weight: 600;
}
.btn-primary:hover {
  background: #1d4ed8;
}

.btn-success {
  background: var(--primary);
  color: #fff;
  font-weight: 600;
}
.btn-success:hover {
  background: var(--primary-hover);
}

.btn-warning {
  background: #f59e0b;
  color: #1e293b;
  font-weight: 600;
}
.btn-warning:hover {
  background: #d97706;
}

.btn-danger {
  color: #ef4444;
}
.btn-danger:hover {
  background: #fee2e2;
  color: #b91c1c;
}

.btn-role {
  background: #475569;
  color: #f8fafc;
  border: 1px solid #64748b;
}
.btn-role:hover {
  background: #64748b;
}

.btn-toggle.on {
  background: #dcfce7;
  color: #166534;
  font-weight: 600;
  border-color: #86efac;
}

.btn-cluster {
  display: inline-flex;
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid #64748b;
}
.btn-cluster button {
  border-radius: 0;
  border: 0;
  border-right: 1px solid #cbd5e1;
}
.btn-cluster button:last-child {
  border-right: 0;
}

input, select {
  font-family: inherit;
  font-size: 12px;
  padding: 4px 8px;
  border: 1px solid #cbd5e1;
  border-radius: 4px;
  outline: none;
  background: #fff;
}
input:focus, select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 1px var(--primary);
}

.checkbox-group {
  display: flex;
  flex-direction: column;
  gap: 3px;
  font-size: 11.5px;
  color: #e2e8f0;
}
.checkbox-group label {
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 4px;
}

.inline-input {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  color: #e2e8f0;
}

/* 2. DASHBOARD BẢNG ĐIỂM */
#dashboard {
  background: #ffffff;
  border-bottom: 1px solid var(--border-color);
  padding: 8px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.dash-card {
  padding: 4px 10px;
  border-radius: 6px;
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 65px;
  border: 1px solid #e2e8f0;
}

.card-label {
  font-size: 10px;
  font-weight: 700;
  color: #64748b;
  margin-bottom: 2px;
}

.card-value {
  font-size: 15px;
  font-weight: 800;
}

.card-correct { background: #f0fdf4; border-color: #bbf7d0; color: #166534; }
.card-wrong { background: #fef2f2; border-color: #fecaca; color: #991b1b; }
.card-pending { background: #f8fafc; border-color: #e2e8f0; color: #475569; }
.card-total { background: #eff6ff; border-color: #bfdbfe; color: #1e40af; }
.card-score { background: #fefce8; border-color: #fef08a; color: #854d0e; }
.card-rate { background: #faf5ff; border-color: #e9d5ff; color: #6b21a8; }

.progress-wrap {
  flex: 1;
  min-width: 220px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.progress-label-row {
  display: flex;
  justify-content: space-between;
  font-size: 11.5px;
}

.badge {
  background: #e2e8f0;
  color: #475569;
  padding: 1px 6px;
  border-radius: 10px;
  font-size: 10.5px;
  font-weight: 600;
}

.progress-bar-bg {
  height: 9px;
  background: #e2e8f0;
  border-radius: 5px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, #107c41, #22c55e);
  transition: width 0.3s ease;
}

/* 3. THANH FX */
#fx-bar {
  background: #ffffff;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  height: 28px;
  padding: 0 8px;
}

#active-cell-coord {
  width: 55px;
  font-weight: 700;
  font-size: 12px;
  color: #334155;
  text-align: center;
  border-right: 1px solid var(--border-color);
}

.fx-icon {
  padding: 0 8px;
  font-style: italic;
  font-weight: bold;
  color: var(--primary);
  user-select: none;
}

#fx-input {
  flex: 1;
  border: 0;
  height: 100%;
  padding: 0 6px;
  font-family: inherit;
  font-size: 13px;
  outline: none;
}

/* 4. SPREADSHEET TABLE */
#sheet-container {
  flex: 1;
  overflow: auto;
  background: #ffffff;
  position: relative;
}

#sheet-table {
  border-collapse: collapse;
  table-layout: fixed;
  background: #fff;
}

/* Header ô A, B, C... và hàng 1, 2, 3... */
th {
  background: #f8fafc;
  color: #475569;
  font-weight: 600;
  font-size: 11.5px;
  border: 1px solid #cbd5e1;
  text-align: center;
  user-select: none;
  position: sticky;
  top: 0;
  z-index: 3;
}

th.corner-header {
  left: 0;
  z-index: 5;
  width: 45px;
  min-width: 45px;
  cursor: pointer;
  background: #f1f5f9;
}

th.col-header {
  padding: 4px 6px;
  min-width: 120px;
  cursor: pointer;
}
th.col-header:hover {
  background: #e2e8f0;
}
th.col-header.selected {
  background: #cbd5e1;
  color: var(--primary);
}

/* Nhãn vai trò nhỏ dưới chữ cái cột A, B, C */
.col-role-tag {
  display: block;
  font-size: 10px;
  font-weight: 700;
  color: var(--primary);
  margin-top: 2px;
  white-space: nowrap;
}

th.row-header {
  left: 0;
  top: auto;
  z-index: 2;
  width: 45px;
  min-width: 45px;
  background: #f8fafc;
  cursor: pointer;
}
th.row-header:hover {
  background: #e2e8f0;
}
th.row-header.selected {
  background: #cbd5e1;
  color: var(--primary);
}

/* Các ô dữ liệu TD */
td {
  border: 1px solid #e2e8f0;
  height: 26px;
  padding: 2px 6px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  outline: none;
  font-size: 13px;
  user-select: none;
}

td[contenteditable="true"] {
  cursor: cell;
}

td.cell-selected {
  background-color: var(--cell-highlight);
}

td.cell-focus {
  outline: 2px solid var(--primary);
  outline-offset: -2px;
  background-color: #fff !important;
}

/* Trạng thái chấm điểm */
td[data-status="ok"] {
  background-color: var(--success-bg) !important;
  color: var(--success-text);
  font-weight: 600;
}

td[data-status="bad"] {
  background-color: var(--danger-bg) !important;
  color: var(--danger-text);
  font-weight: 600;
}

/* Ô nhập liệu đáp án nổi bật */
td.col-input-cell {
  background-color: #fcfbf2;
}

/* Ô kết quả công thức */
td.col-res-cell {
  text-align: center;
  font-weight: 700;
}

/* 5. MODAL QUÉT DỮ LIỆU */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(2px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
}
.modal-backdrop[hidden] {
  display: none;
}

.modal-box {
  background: #fff;
  border-radius: 8px;
  width: min(850px, 94vw);
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 20px 25px -5px rgba(0,0,0,0.2);
}

.modal-header {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.modal-header h3 {
  font-size: 15px;
  color: #0f172a;
}
.modal-close {
  background: none;
  border: 0;
  font-size: 20px;
  cursor: pointer;
  color: #64748b;
}

.modal-body {
  padding: 16px;
  overflow-y: auto;
  flex: 1;
}

.modal-hint {
  font-size: 12px;
  color: #475569;
  margin-bottom: 8px;
}

#importTextarea {
  width: 100%;
  height: 160px;
  font-family: 'Consolas', monospace;
  font-size: 13px;
  padding: 8px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  outline: none;
  resize: vertical;
}

.preview-table-wrap {
  max-height: 250px;
  overflow: auto;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  margin-top: 8px;
}

#previewTable {
  width: 100%;
  border-collapse: collapse;
}
#previewTable th, #previewTable td {
  border: 1px solid #e2e8f0;
  padding: 6px 8px;
  text-align: left;
}
#previewTable th {
  background: #f8fafc;
}
#previewTable select {
  width: 100%;
  padding: 3px;
}

.modal-footer {
  padding: 12px 16px;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}