/* ==============================================================
   WRITING PRACTICE ENGINE CSS (LUYỆN VIẾT CHỮ HÁN & THỨ TỰ NÉT)
   Hỗ trợ từ đơn & từ nhiều chữ (vd: 北京, 出租车), ô Mễ Tự chuẩn,
   cân đối hoàn hảo trên cả máy tính lẫn điện thoại, phát âm chuẩn.
   ============================================================== */

.writing-container {
  max-width: 1060px;
  margin: 0 auto;
  padding: 12px 16px 50px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  box-sizing: border-box;
}

/* Header & Top Bar */
.writing-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-color, #e2e8f0);
}

.writing-head-titles h2 {
  font-size: 1.6rem;
  margin: 0 0 4px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-color, #0f172a);
}

.writing-head-titles p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--subtext-color, #64748b);
}

.writing-top-controls {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

/* HSK Level Selector in Writing Bar */
.writing-hsk-picker {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--card-bg, #ffffff);
  border: 1px solid var(--border-color, #cbd5e1);
  padding: 4px 10px;
  border-radius: 8px;
}

.writing-hsk-label {
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--subtext-color, #64748b);
}

.writing-hsk-select {
  border: none;
  background: transparent;
  font-size: 0.92rem;
  font-weight: 700;
  color: #2563eb;
  cursor: pointer;
  outline: none;
  padding: 4px 2px;
}

.writing-search-bar {
  display: flex;
  align-items: center;
  gap: 6px;
}

.writing-search-input {
  padding: 8px 12px;
  border: 1px solid var(--border-color, #cbd5e1);
  border-radius: 8px;
  font-size: 0.92rem;
  background: var(--card-bg, #ffffff);
  color: var(--text-color, #0f172a);
  width: 150px;
  transition: all 0.2s ease;
}

.writing-search-input:focus {
  outline: none;
  border-color: #3b82f6;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
  width: 180px;
}

.writing-btn-sm {
  padding: 8px 14px;
  font-size: 0.88rem;
  font-weight: 600;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  background: #3b82f6;
  color: #fff;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.writing-btn-sm:hover {
  background: #2563eb;
  transform: translateY(-1px);
}

/* Word Bar (Word Info & Navigation) */
.writing-word-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  background: var(--card-bg, #ffffff);
  border: 1px solid var(--border-color, #e2e8f0);
  border-radius: 14px;
  padding: 14px 18px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.04);
}

.writing-word-info {
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
}

.writing-cur-word {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-color, #0f172a);
  letter-spacing: 2px;
}

.writing-cur-pinyin {
  font-size: 1.25rem;
  color: #2563eb;
  font-weight: 700;
}

.writing-cur-meaning {
  font-size: 0.98rem;
  color: var(--subtext-color, #64748b);
  max-width: 320px;
}

/* Main Speaker Button with Visual Pulse */
.writing-speak-btn {
  background: rgba(37, 99, 235, 0.1);
  border: 1px solid rgba(37, 99, 235, 0.25);
  color: #2563eb;
  font-size: 1.25rem;
  padding: 6px 12px;
  border-radius: 8px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s ease;
  line-height: 1;
}

.writing-speak-btn:hover {
  background: #2563eb;
  color: #ffffff;
  transform: scale(1.05);
}

.writing-speak-btn.speaking {
  animation: pulseAudio 0.9s infinite alternate;
  background: #2563eb;
  color: #ffffff;
}

@keyframes pulseAudio {
  0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(37, 99, 235, 0.6); }
  100% { transform: scale(1.1); box-shadow: 0 0 0 10px rgba(37, 99, 235, 0); }
}

.writing-nav-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.writing-nav-btn {
  padding: 7px 13px;
  border: 1px solid var(--border-color, #cbd5e1);
  border-radius: 8px;
  background: var(--bg-color, #f8fafc);
  color: var(--text-color, #334155);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition: all 0.15s ease;
}

.writing-nav-btn:hover {
  background: #e2e8f0;
  color: #0f172a;
}

#wp-word-counter {
  font-weight: 700;
  font-size: 0.92rem;
  color: #64748b;
  min-width: 65px;
  text-align: center;
}

/* Mode Switcher Tabs */
.writing-mode-tabs {
  display: flex;
  gap: 8px;
  border-bottom: 2px solid var(--border-color, #e2e8f0);
  padding-bottom: 8px;
  overflow-x: auto;
}

.writing-mode-tab {
  padding: 9px 16px;
  font-size: 0.92rem;
  font-weight: 600;
  border-radius: 8px;
  border: none;
  background: transparent;
  color: var(--subtext-color, #64748b);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.writing-mode-tab:hover {
  color: #2563eb;
  background: rgba(37, 99, 235, 0.08);
}

.writing-mode-tab.active {
  background: #2563eb;
  color: #ffffff;
}

/* Main Workspace Grid (Left: Multi-Canvas Card | Right: Radicals & Stroke Order) */
.writing-workspace {
  display: grid;
  grid-template-columns: minmax(360px, 1.25fr) minmax(320px, 1fr);
  gap: 20px;
  align-items: start;
}

@media (max-width: 860px) {
  .writing-workspace {
    grid-template-columns: 1fr;
    justify-items: center;
  }
}

/* Canvas Card (Contains multiple character boxes for multi-character words) */
.writing-canvas-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: var(--card-bg, #ffffff);
  border: 1px solid var(--border-color, #e2e8f0);
  border-radius: 16px;
  padding: 20px;
  box-shadow: 0 4px 14px rgba(0,0,0,0.05);
  width: 100%;
  box-sizing: border-box;
}

/* Multi-character Grid: displays all characters of the word together! */
.mizige-multi-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 14px;
  width: 100%;
  margin-bottom: 12px;
}

/* Individual Character Card in Multi-character word */
.mizige-char-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 8px;
  border-radius: 12px;
  background: var(--bg-color, #f8fafc);
  border: 2px solid transparent;
  transition: all 0.2s ease;
  cursor: pointer;
}

.mizige-char-block:hover {
  background: #f1f5f9;
}

.mizige-char-block.active {
  border-color: #2563eb;
  background: #eff6ff;
  box-shadow: 0 0 16px rgba(37, 99, 235, 0.25);
}

.mizige-char-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 0 4px;
  box-sizing: border-box;
}

.mizige-char-order {
  font-size: 0.8rem;
  font-weight: 700;
  color: #64748b;
}

.mizige-char-hanzi {
  font-size: 1.15rem;
  font-weight: 800;
  color: #1e293b;
}

.mizige-char-audio-btn {
  border: none;
  background: transparent;
  cursor: pointer;
  font-size: 0.95rem;
  padding: 2px 4px;
  border-radius: 4px;
  transition: transform 0.15s ease;
}

.mizige-char-audio-btn:hover {
  transform: scale(1.2);
}

/* Ô Viết Chữ Hán - Lưới Ô Ly Nhỏ Chuẩn Vở Tập Viết */
.mizige-box-wrap {
  position: relative;
  isolation: isolate; /* Cách ly stacking context, đảm bảo nét chữ z-index: 2 luôn nằm trên nền z-index: 1 */
  border: 2.5px solid #ef4444; /* Khung đỏ truyền thống của vở tập viết */
  border-radius: 8px;
  background: #fffdfa; /* Nền giấy tập ấm áp */
  overflow: hidden;
  box-shadow: inset 0 0 10px rgba(0,0,0,0.03);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Đảm bảo chữ Hán và các nét viết LUÔN nằm trên lớp lưới nền (KHÔNG bao giờ bị lưới đè lên chữ) */
.mizige-box-wrap svg {
  position: relative;
  z-index: 2;
  display: block;
}

/* Lưới các ô ly nhỏ chuẩn vở tập viết (nằm chìm bên dưới ở z-index: 1, KHÔNG đè lên chữ) */
.mizige-box-wrap::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'%3E%3Cline x1='25' y1='0' x2='25' y2='100' stroke='rgba(239,68,68,0.22)' stroke-width='0.6' stroke-dasharray='2,2'/%3E%3Cline x1='75' y1='0' x2='75' y2='100' stroke='rgba(239,68,68,0.22)' stroke-width='0.6' stroke-dasharray='2,2'/%3E%3Cline x1='0' y1='25' x2='100' y2='25' stroke='rgba(239,68,68,0.22)' stroke-width='0.6' stroke-dasharray='2,2'/%3E%3Cline x1='0' y1='75' x2='100' y2='75' stroke='rgba(239,68,68,0.22)' stroke-width='0.6' stroke-dasharray='2,2'/%3E%3Cline x1='50' y1='0' x2='50' y2='100' stroke='rgba(239,68,68,0.48)' stroke-width='0.8' stroke-dasharray='3,2'/%3E%3Cline x1='0' y1='50' x2='100' y2='50' stroke='rgba(239,68,68,0.48)' stroke-width='0.8' stroke-dasharray='3,2'/%3E%3C/svg%3E");
  background-size: 100% 100%;
}

.mizige-char-badge {
  font-size: 0.78rem;
  font-weight: 700;
  color: #475569;
  background: #e2e8f0;
  padding: 2px 8px;
  border-radius: 99px;
  transition: all 0.2s ease;
}

.mizige-char-block.completed .mizige-char-badge {
  background: #d1fae5;
  color: #065f46;
}

/* Quiz Status Badge */
.writing-quiz-status {
  margin: 6px 0 14px;
  padding: 8px 16px;
  font-size: 0.92rem;
  font-weight: 600;
  border-radius: 8px;
  background: #eff6ff;
  color: #1e40af;
  border: 1px solid #bfdbfe;
  width: 100%;
  text-align: center;
  box-sizing: border-box;
}

.writing-quiz-status.correct {
  background: #ecfdf5;
  color: #065f46;
  border-color: #a7f3d0;
}

.writing-quiz-status.mistake {
  background: #fef2f2;
  color: #991b1b;
  border-color: #fecaca;
}

/* Canvas Action Buttons */
.writing-canvas-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  width: 100%;
}

.writing-action-btn {
  padding: 9px 14px;
  font-size: 0.88rem;
  font-weight: 600;
  border-radius: 8px;
  border: 1px solid var(--border-color, #cbd5e1);
  background: var(--bg-color, #f8fafc);
  color: var(--text-color, #334155);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.15s ease;
}

.writing-action-btn:hover {
  background: #e2e8f0;
}

.writing-action-btn.primary {
  background: #2563eb;
  color: #ffffff;
  border-color: #2563eb;
}

.writing-action-btn.primary:hover {
  background: #1d4ed8;
}

.writing-action-btn.success {
  background: #059669;
  color: #ffffff;
  border-color: #059669;
}

.writing-action-btn.success:hover {
  background: #047857;
}

/* Right Details Card (Radical + Stroke Order) */
.writing-details-card {
  display: flex;
  flex-direction: column;
  gap: 16px;
  width: 100%;
}

/* Character Switcher in Details Card for multi-character words */
.writing-char-switcher {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  padding: 6px;
  background: var(--card-bg, #ffffff);
  border: 1px solid var(--border-color, #e2e8f0);
  border-radius: 10px;
}

.writing-char-switch-tab {
  flex: 1;
  min-width: 90px;
  padding: 7px 12px;
  border: 1px solid var(--border-color, #cbd5e1);
  background: var(--bg-color, #f8fafc);
  color: var(--text-color, #475569);
  border-radius: 8px;
  font-size: 0.88rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.15s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.writing-char-switch-tab:hover {
  background: #e2e8f0;
}

.writing-char-switch-tab.active {
  background: #2563eb;
  color: #ffffff;
  border-color: #2563eb;
  box-shadow: 0 2px 6px rgba(37,99,235,0.3);
}

.writing-radical-box,
.writing-strokes-box {
  background: var(--card-bg, #ffffff);
  border: 1px solid var(--border-color, #e2e8f0);
  border-radius: 14px;
  padding: 18px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.03);
}

.writing-box-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-color, #0f172a);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.writing-radical-content {
  display: flex;
  align-items: center;
  gap: 16px;
}

.writing-radical-badge {
  width: 64px;
  height: 64px;
  border-radius: 12px;
  background: #ecfdf5;
  border: 2px solid #059669;
  color: #059669;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.2rem;
  font-weight: bold;
  flex-shrink: 0;
}

.writing-radical-desc {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.writing-radical-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-color, #0f172a);
}

.writing-radical-meaning {
  font-size: 0.9rem;
  color: var(--subtext-color, #64748b);
  line-height: 1.45;
}

/* Stroke Order Stepper & Chips */
.writing-stroke-stepper {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.writing-stroke-count {
  font-weight: 700;
  color: #2563eb;
  font-size: 0.95rem;
}

.writing-stroke-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 8px;
  max-height: 240px;
  overflow-y: auto;
  padding-right: 4px;
}

.writing-stroke-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid var(--border-color, #cbd5e1);
  background: var(--bg-color, #f8fafc);
  cursor: pointer;
  transition: all 0.15s ease;
}

.writing-stroke-chip:hover {
  background: #e2e8f0;
  border-color: #94a3b8;
}

.writing-stroke-chip.active {
  background: #eff6ff;
  border-color: #2563eb;
  box-shadow: 0 0 0 1px #2563eb;
}

.stroke-idx {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #2563eb;
  color: #fff;
  font-size: 0.78rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.stroke-info {
  display: flex;
  flex-direction: column;
}

.stroke-info b {
  font-size: 0.84rem;
  color: var(--text-color, #1e293b);
}

.stroke-info span {
  font-size: 0.75rem;
  color: var(--subtext-color, #64748b);
}

/* 214 Kangxi Radicals View */
.writing-radicals-view {
  display: none;
  flex-direction: column;
  gap: 16px;
  background: var(--card-bg, #ffffff);
  border: 1px solid var(--border-color, #e2e8f0);
  border-radius: 14px;
  padding: 18px;
}

.writing-radicals-view.active {
  display: flex;
}

.writing-radicals-filter {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.writing-radicals-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(135px, 1fr));
  gap: 10px;
  max-height: 480px;
  overflow-y: auto;
  padding: 4px;
}

.writing-rad-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px;
  border-radius: 8px;
  border: 1px solid var(--border-color, #cbd5e1);
  background: var(--bg-color, #f8fafc);
  cursor: pointer;
  transition: all 0.15s ease;
}

.writing-rad-item:hover {
  background: #eff6ff;
  border-color: #2563eb;
  transform: translateY(-2px);
  box-shadow: 0 2px 8px rgba(37,99,235,0.15);
}

.writing-rad-char {
  font-size: 1.6rem;
  font-weight: bold;
  color: #059669;
  width: 38px;
  text-align: center;
  flex-shrink: 0;
}

.writing-rad-text {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.writing-rad-text b {
  font-size: 0.85rem;
  color: var(--text-color, #0f172a);
}

.writing-rad-text span {
  font-size: 0.75rem;
  color: var(--subtext-color, #64748b);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Celebration Overlay Modal */
.writing-celebrate-modal {
  position: fixed;
  inset: 0;
  z-index: 10090;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(4px);
  padding: 16px;
}

.writing-celebrate-content {
  background: var(--card-bg, #ffffff);
  border-radius: 18px;
  padding: 28px;
  max-width: 400px;
  width: 100%;
  text-align: center;
  box-shadow: 0 20px 40px rgba(0,0,0,0.25);
  animation: popIn 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes popIn {
  from { transform: scale(0.85); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.writing-celebrate-icon {
  font-size: 3.5rem;
  margin-bottom: 8px;
}

.writing-celebrate-content h3 {
  margin: 0 0 8px;
  font-size: 1.45rem;
  color: var(--text-color, #0f172a);
}

.writing-celebrate-content p {
  margin: 0 0 16px;
  color: var(--subtext-color, #64748b);
  font-size: 0.95rem;
}

/* ==============================================================
   RESPONSIVE DESIGN FOR BOTH MOBILE AND DESKTOP
   ============================================================== */
@media (max-width: 600px) {
  .writing-container {
    padding: 10px 10px 40px;
    gap: 14px;
  }
  .writing-head-titles h2 {
    font-size: 1.35rem;
  }
  .writing-cur-word {
    font-size: 1.65rem;
  }
  .writing-cur-pinyin {
    font-size: 1.1rem;
  }
  .writing-search-input {
    width: 120px;
  }
  .writing-search-input:focus {
    width: 140px;
  }
  .writing-canvas-card {
    padding: 12px;
  }
  .mizige-multi-grid {
    gap: 8px;
  }
  .mizige-char-block {
    padding: 5px;
  }
}


/* ==============================================================
   VOCABULARY ILLUSTRATION CARD IN WRITING PRACTICE
   ============================================================== */
.writing-image-box {
  background: var(--card-bg, #ffffff);
  border: 1px solid var(--border-color, #e2e8f0);
  border-radius: 14px;
  padding: 14px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.04);
}

.writing-img-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  margin-top: 10px;
}

.writing-vocab-img {
  width: 100%;
  max-height: 200px;
  min-height: 140px;
  object-fit: cover;
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
  border: 1px solid rgba(0,0,0,0.06);
  background: #f1f5f9;
}

.writing-img-caption {
  font-size: 0.88rem;
  font-weight: 700;
  color: #2563eb;
  text-align: center;
  padding: 4px 10px;
  border-radius: 6px;
  background: rgba(37, 99, 235, 0.08);
  max-width: 100%;
  word-break: break-word;
}

body.dark-mode .writing-image-box {
  background: #1e293b;
  border-color: #334155;
}

body.dark-mode .writing-vocab-img {
  border-color: rgba(255,255,255,0.1);
  background: #0f172a;
}

body.dark-mode .writing-img-caption {
  color: #38bdf8;
  background: rgba(56, 189, 248, 0.12);
}