:root {
  --bg: #f4f8ff;
  --panel: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --primary: #1f6feb;
  --primary-soft: #eaf1ff;
  --danger: #c81e1e;
  --border: #dbe3ef;
  --ok: #0f7a32;
  --select: #ffeb3b;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--text);
  font-family: "Segoe UI", Tahoma, sans-serif;
  background:
    radial-gradient(circle at 20% 10%, #dfeafe 0%, transparent 35%),
    radial-gradient(circle at 80% 0%, #e9fff3 0%, transparent 30%),
    var(--bg);
}

.site-header {
  text-align: center;
  padding: 28px 16px 8px;
}

.site-header h1 {
  margin: 0;
  font-size: 32px;
}

.site-header p {
  margin: 6px 0 0;
  color: var(--muted);
}

.layout {
  max-width: 1100px;
  margin: 0 auto;
  padding: 16px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 18px;
  box-shadow: 0 10px 30px rgba(20, 46, 110, 0.08);
}

.tabs {
  display: flex;
  gap: 10px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.tab-btn {
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  border-radius: 10px;
  padding: 8px 12px;
  cursor: pointer;
}

.tab-btn.active {
  background: var(--primary-soft);
  border-color: var(--primary);
  color: var(--primary);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 16px;
}

.form-grid label {
  display: grid;
  gap: 6px;
  font-size: 14px;
  color: var(--muted);
}

.form-grid input,
.form-grid select {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px;
  font-size: 14px;
  color: var(--text);
  background: #fff;
}

select[multiple] {
  min-height: 110px;
}

.full {
  grid-column: 1 / -1;
}

.actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

button {
  border: 1px solid transparent;
  background: var(--primary);
  color: #fff;
  border-radius: 10px;
  padding: 10px 14px;
  cursor: pointer;
  font-size: 14px;
}

button.ghost {
  background: #fff;
  color: var(--text);
  border-color: var(--border);
}

button.danger {
  background: #fff5f5;
  color: var(--danger);
  border-color: #f7d0d0;
}

.table-wrap {
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: 12px;
}

.csv-import-panel {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  margin-bottom: 14px;
  background: #fbfdff;
}

.assistant-panel {
  border: 1px solid #d7ccff;
  background: #f7f2ff;
  border-radius: 12px;
  padding: 14px;
  display: grid;
  gap: 12px;
}

.assistant-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  flex-wrap: wrap;
}

.assistant-title {
  font-size: 15px;
  font-weight: 600;
}

.assistant-subtitle {
  font-size: 14px;
  color: #594f75;
}

.assistant-status-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
}

.assistant-badge {
  border: 1px solid #d4d4d4;
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 13px;
  color: #444;
  background: #f4f4f4;
}

.assistant-badge.connected {
  border-color: #86d7a3;
  color: #0f7a32;
  background: #e8faef;
}

.assistant-meta {
  display: grid;
  gap: 4px;
  color: #4f4673;
  font-size: 14px;
}

.assistant-flow-info {
  border: 1px solid #dec6ff;
  background: #efe3ff;
  border-radius: 10px;
  padding: 8px;
  color: #4b3275;
}

.assistant-last-error {
  border: 1px solid #ffc2c2;
  background: #fff1f1;
  color: #a11e1e;
  border-radius: 10px;
  padding: 8px;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  padding: 10px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

.collection-list {
  display: grid;
  gap: 10px;
}

.collection-item {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
}

.collection-item p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.game-board {
  margin-top: 10px;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
  background: #fcfdff;
}

.stats {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 8px;
  color: var(--muted);
}

.options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 10px;
}

.options button {
  text-align: left;
  min-height: 44px;
}

.options button.correct {
  background: #e6f8ec;
  border-color: #b8e7c7;
  color: var(--ok);
}

.options button.wrong {
  background: #fff3f3;
  border-color: #f4caca;
  color: var(--danger);
}

.options button.selected {
  background: #fff9c4;
  border-color: #f8dc56;
  color: #6b5800;
}

.build-controls {
  margin-top: 14px;
}

.build-answer {
  margin-bottom: 8px;
}

.card-info {
  color: var(--muted);
}

.card-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 10px 0;
}

.legend-item {
  border-radius: 12px;
  padding: 6px 10px;
  border: 1px solid var(--border);
  font-size: 13px;
}

.legend-word {
  background: #e3f2fd;
}

.legend-pronunciation {
  background: #f3e5f5;
}

.legend-translation {
  background: #e8f5e8;
}

.legend-selected {
  background: #ffeb3b;
}

.legend-correct {
  background: #4caf50;
  color: #fff;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 8px;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  min-height: 120px;
  background: #fff;
}

.card-item {
  width: 100%;
  min-height: 72px;
  border-radius: 10px;
  border: 1px solid transparent;
  text-align: center;
  color: #1f2937;
  font-weight: 600;
  line-height: 1.3;
  word-break: break-word;
}

.card-item.card-word {
  background: #e3f2fd;
}

.card-item.card-pronunciation {
  background: #f3e5f5;
}

.card-item.card-translation {
  background: #e8f5e8;
}

.card-item.card-selected {
  background: #ffeb3b;
  border-color: #e6c80f;
}

.card-item.card-correct {
  background: #4caf50;
  color: #fff;
}

.card-item.card-incorrect {
  background: #f44336;
  color: #fff;
}

.completed-chains-wrap {
  margin-top: 14px;
}

.completed-chains {
  margin: 0;
  padding-left: 18px;
  color: var(--text);
}

.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  display: grid;
  place-items: center;
  padding: 16px;
}

.modal-card {
  width: min(640px, 100%);
  max-height: 90vh;
  overflow: auto;
  background: #fff;
  border-radius: 12px;
  padding: 18px;
}

.toast {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: #111827;
  color: #fff;
  padding: 10px 14px;
  border-radius: 10px;
  max-width: 420px;
}

.chatbot-widget {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 1000;
}

.chatbot-toggle {
  border-radius: 999px;
  padding: 11px 16px;
  background: #1d4ed8;
  box-shadow: 0 8px 22px rgba(13, 40, 99, 0.3);
}

.chatbot-panel {
  width: min(420px, calc(100vw - 28px));
  height: min(560px, calc(100vh - 90px));
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 14px 30px rgba(10, 23, 56, 0.22);
  display: grid;
  grid-template-rows: auto 1fr auto;
  margin-top: 10px;
  overflow: hidden;
}

.chatbot-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  background: #f8faff;
}

.chatbot-messages {
  padding: 10px;
  overflow: auto;
  display: grid;
  gap: 8px;
  background: #fcfdff;
}

.chatbot-msg {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 10px;
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 14px;
}

.chatbot-msg.user {
  background: #ecf4ff;
}

.chatbot-msg.assistant {
  background: #f8f9fb;
}

.chatbot-form {
  border-top: 1px solid var(--border);
  padding: 10px;
  background: #fff;
}

.chatbot-form textarea {
  width: 100%;
  resize: vertical;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px;
  font: inherit;
  margin-bottom: 8px;
}

.hidden {
  display: none !important;
}

@media (max-width: 800px) {
  .form-grid {
    grid-template-columns: 1fr;
  }

  .card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}