/* ========================================================== */
/* FILE: css/style.css (Full Updated) */
/* ========================================================== */

@import url("./theme.css");
@import url("./base.css");
@import url("./layout.css");
@import url("./components.css");
@import url("./viewer.css");
@import url("./effects.css");

/* =================== 1. LAYOUT CHUNG & MOBILE SPLIT VIEW =================== */

/* TOPBAR GLOBAL */
#topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--topbar-h);
  padding: 0 16px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 300;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
}

.brand {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  font-size: 18px;
  font-weight: 800;
  text-align: center;
  white-space: nowrap;
}

.topbar-right {
  flex: 1;
  display: flex;
  justify-content: flex-end;
}

#themeBadge {
  position: static !important;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin: 0;
  cursor: pointer;
}

/* MOBILE CONFIGURATION (Max-width: 768px) */
@media (max-width: 768px) {
  #hamburger {
    display: none !important;
  }

  /* Chia đôi màn hình */
  #app {
    display: flex !important;
    flex-direction: column !important;
    height: calc(100vh - var(--topbar-h));
    overflow: hidden;
  }

  /* Viewer: 40% */
  #viewerWrap {
    order: 1;
    width: 100% !important;
    height: 40vh !important;
    flex: none !important;
    border-radius: 0 !important;
    border-bottom: 2px solid var(--border);
    border-left: none;
    border-right: none;
    z-index: 1;
  }

  /* Controls: 60% */
  #controls {
    order: 2;
    position: static !important;
    width: 100% !important;
    height: auto !important;
    flex: 1 1 auto !important;
    background: var(--bg) !important;
    transform: none !important;
    box-shadow: none !important;
    border: none;
    padding: 12px;
    padding-bottom: 80px;
    /* Chừa chỗ cho bàn phím ảo */
    overflow-y: auto;
    z-index: 2;
  }

  #overlay {
    display: none !important;
  }

  .row {
    display: grid !important;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  .row button,
  input,
  select {
    width: 100%;
    margin: 0 !important;
    min-height: 42px;
    font-size: 15px;
  }
}

/* =================== 2. VIEWER & RESET BUTTON =================== */

#viewerWrap {
  position: relative !important;
  overflow: hidden;
}

/* --- CSS CHO 2 NÚT CÔNG CỤ TRÊN GÓC PHẢI DƯỚI --- */
.view-tool-btn {
  position: absolute;
  right: 15px;
  z-index: 10;
  width: 40px; /* Thu nhỏ lại 1 chút cho đỡ thô */
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--card, #fff);
  color: var(--fg, #333);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 1.2rem;
}

.view-tool-btn:hover {
  background: var(--accent, #3b82f6);
  color: #fff;
  border-color: var(--accent, #3b82f6);
}

/* Vị trí mặc định trên Desktop */
#btnTogglePanel {
  bottom: 65px; /* Nằm trên nút crosshair */
  display: none; /* TRÊN DESKTOP ẨN NÚT NÀY ĐI VÌ KHÔNG CẦN THIẾT */
}
#btnResetView {
  bottom: 15px;
}

body.dark .view-tool-btn {
  background: #1e1e1e;
  border-color: #444;
  color: #fff;
}

/* ================= TỐI ƯU MOBILE - LÀM LẠI CHUẨN GRID ================= */
@media (max-width: 768px) {
  /* Hiện nút mũi tên trên Mobile */
  #btnTogglePanel {
    display: flex !important;
  }

  /* CẤU TRÚC GRID ĐỘNG ĐỂ JS CAN THIỆP */
  #app {
    display: grid !important;
    /* Mặc định Panel hiển thị 40vh. Biến CSS này sẽ bị JS thay đổi khi bấm nút */
    grid-template-rows: var(--app-grid-rows, 1fr 40vh) !important;
    height: calc(100vh - 50px) !important;
    overflow: hidden !important;
    transition: grid-template-rows 0.4s cubic-bezier(0.4, 0, 0.2, 1) !important;
  }

  #viewerWrap {
    grid-row: 1 !important;
    height: 100% !important;
    position: relative !important;
  }

  #controls {
    grid-row: 2 !important;
    height: 100% !important;
    overflow-y: auto !important;
    display: block !important;
    background: var(--bg);
    padding-bottom: 20px !important;
  }

  .tab-content {
    padding-bottom: 50px !important;
    height: auto !important;
  }

  /* Cập nhật Header Icon */
  .topbar-left a.topbar-icon[title="Thư viện kiến thức"],
  .topbar-left a.topbar-icon[title="Tài liệu tham khảo"] {
    display: none !important;
  }
  .brand {
    font-size: 1.2rem !important;
    margin-left: -5px;
  }
  .mobile-only-hr-book,
  .mobile-only-link-book,
  .mobile-only-hr-file,
  .mobile-only-link-file {
    display: flex !important;
  }
}

/* =================== 3. PRO TOAST NOTIFICATION (POPUP ĐỘNG) =================== */

#toast-container {
  position: fixed;
  top: 80px;
  right: 20px;
  z-index: 10000;
  display: flex;
  flex-direction: column;
  gap: 12px;
  pointer-events: none;
}

.toast-item {
  pointer-events: auto;
  position: relative;
  min-width: 320px;
  max-width: 400px;
  background: var(--card);
  color: var(--fg);
  border-left: 5px solid #ff4d4f;
  /* Viền đỏ báo lỗi */
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  border-radius: 6px;
  padding: 14px 18px;
  padding-bottom: 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  overflow: hidden;
  animation: toastSlideIn 0.4s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}

.toast-item.hide {
  animation: toastSlideOut 0.4s forwards;
}

.toast-content {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95em;
  font-weight: 500;
  line-height: 1.4;
}

.toast-icon {
  color: #ff4d4f;
  font-size: 1.4em;
  flex-shrink: 0;
}

.toast-progress {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 3px;
  background-color: #ff4d4f;
  width: 100%;
  animation: progressRun 5s linear forwards;
}

@keyframes toastSlideIn {
  from {
    transform: translateX(120%);
    opacity: 0;
  }

  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes toastSlideOut {
  from {
    transform: translateX(0);
    opacity: 1;
  }

  to {
    transform: translateX(120%);
    opacity: 0;
  }
}

@keyframes progressRun {
  from {
    width: 100%;
  }

  to {
    width: 0%;
  }
}

/* =================== 4. CHECKLIST NÂNG CẤP (LAYOUT CHUẨN) =================== */

.checklist-tools {
  padding-bottom: 8px;
  margin-bottom: 8px;
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.vec-search-inp {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--fg);
  font-size: 0.95em;
}

/* Dòng "Chọn tất cả" và Dòng Vector */
.select-all-row,
.vec-item-row {
  display: flex;
  justify-content: space-between;
  /* Chữ trái - Tick phải */
  align-items: center;
  padding: 8px 6px;
  cursor: pointer;
  border-radius: 4px;
  user-select: none;
  transition: background 0.15s;
}

.vec-item-row {
  border-bottom: 1px dashed var(--border);
}

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

.vec-item-row:hover,
.select-all-row:hover {
  background: var(--hover);
}

.vec-label-text,
.select-all-text {
  flex: 1;
  text-align: left;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-right: 15px;
  font-weight: 500;
  font-size: 0.95em;
  color: var(--fg);
}

.vec-label-text {
  font-family: "Consolas", monospace;
}

.vec-checkbox,
.select-all-cb {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  cursor: pointer;
  accent-color: var(--primary);
}

/* [SỬA HOẶC THÊM MỚI] */
.vec-list-scroll {
  max-height: 280px;
  /* Tăng chiều cao lên để nhìn được nhiều hơn */
  overflow-y: auto;
  /* Bắt buộc có thanh cuộn */
  padding-right: 4px;

  /* Thêm viền nhẹ để phân biệt vùng cuộn (tùy chọn) */
  border: 1px solid var(--border);
  border-radius: 4px;
  margin-top: 4px;
}

.empty-list-msg {
  text-align: center;
  color: #ff4d4f;
  font-size: 0.95em;
  padding: 15px;
  border: 1px dashed #ff4d4f;
  border-radius: 6px;
  cursor: pointer;
  background: rgba(255, 77, 79, 0.05);
  margin-top: 5px;
}

.empty-list-msg:hover {
  background: rgba(255, 77, 79, 0.1);
  font-weight: 600;
}

/* =================== 5. MATH KEYPAD (FULL WIDTH) =================== */

#mathKeypad {
  position: fixed !important;
  left: 0 !important;
  right: 0 !important;
  bottom: 0 !important;
  width: 100% !important;
  background: var(--bg);
  border-top: 1px solid var(--border);
  box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.1);
  z-index: 2147483647;
  transform: translateY(100%);
  transition: transform 0.25s cubic-bezier(0.2, 0.8, 0.2, 1);
  display: flex;
  flex-direction: column;
  align-items: center;
}

#mathKeypad.open {
  transform: translateY(0);
}

.keypad-header {
  width: 100%;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding: 0 15px;
  background: color-mix(in srgb, var(--bg) 95%, var(--fg));
  border-bottom: 1px solid var(--border);
}

#keypadClose {
  background: transparent;
  border: none;
  font-size: 20px;
  color: var(--muted);
  cursor: pointer;
  padding: 0 10px;
  line-height: 1;
}

#keypadClose:hover {
  color: var(--danger);
}

.keypad-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
  padding: 10px;
  width: 100%;
  max-width: 900px;
}

.k-btn {
  height: 46px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--card);
  color: var(--fg);
  font-size: 18px;
  font-family: "JetBrains Mono", monospace;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.1s;
}

.k-btn:active {
  background: var(--border);
  transform: scale(0.98);
}

.k-btn.op {
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 5%, var(--card));
}

.k-btn.primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.drag-handle {
  display: none;
}

input,
.lbl,
.card-header button,
.card-header .btn,
.vec-item input {
  font-family: "JetBrains Mono", "Consolas", monospace;
  font-weight: 600;
}

input:focus {
  border-color: var(--accent) !important;
  box-shadow: 0 0 0 2px rgba(var(--accent-rgb), 0.2);
}

body.has-keypad #controls {
  padding-bottom: 50vh !important;
  scroll-behavior: smooth;
}

/* =================== 6. TÙY CHỈNH INPUT HỆ SỐ K (ĐÃ SỬA) =================== */

/* Căn giữa chữ trong ô input K */
#scalarInp {
  text-align: center;
  /* Số nằm giữa */
  font-weight: bold;
  color: var(--accent);
  font-size: 1.1em;
  padding: 0;
  /* Bỏ padding thừa để căn giữa chuẩn hơn */
}

/* Ẩn mũi tên lên xuống (Spinners) cho Chrome/Safari/Edge */
input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

/* Ẩn mũi tên cho Firefox (Sửa để hết gạch vàng: dùng appearance chuẩn) */
input[type="number"] {
  appearance: textfield;
  /* Chuẩn mới */
  -moz-appearance: textfield;
  /* Chuẩn cũ Firefox */
}

/* =================== SETTINGS MENU & ANIMATION =================== */

/* Container nút cài đặt nằm trong Topbar */
.settings-container {
  position: relative;
  display: flex;
  align-items: center;
}

/* Style Nút Bánh Răng */
.icon-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--fg);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 1.1rem;
}

.icon-btn:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  transform: rotate(45deg);
}

/* Menu Dropdown */
.settings-dropdown {
  position: absolute;
  top: 45px;
  /* Cách topbar một chút */
  right: 0;
  width: 250px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--shadow-lg);
  padding: 12px;
  display: none;
  flex-direction: column;
  gap: 6px;
  z-index: 1000;
}

.settings-dropdown.show {
  display: flex;
  animation: slideDown 0.2s cubic-bezier(0.2, 0.8, 0.2, 1);
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.setting-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 4px 0;
}

.st-label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--fg);
}

/* Toggle Switch đẹp */
.switch {
  position: relative;
  display: inline-block;
  width: 40px;
  height: 22px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--muted);
  opacity: 0.5;
  transition: 0.3s;
  border-radius: 34px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 16px;
  width: 16px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: 0.3s;
  border-radius: 50%;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

input:checked + .slider {
  background-color: var(--accent);
  opacity: 1;
}

input:checked + .slider:before {
  transform: translateX(18px);
}

/* Animation Mặt Trời / Mặt Trăng */
.theme-transition-icons {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 9999;
  pointer-events: none;
  display: flex;
  justify-content: center;
  align-items: center;
}

#sunIcon,
#moonIcon {
  font-size: 8rem;
  position: absolute;
  opacity: 0;
  transform: translateY(100px) scale(0.5);
}

#sunIcon {
  color: #f59e0b;
  filter: drop-shadow(0 0 40px rgba(245, 158, 11, 0.8));
}

#moonIcon {
  color: #f8fafc;
  filter: drop-shadow(0 0 40px rgba(248, 250, 252, 0.8));
}

.animate-rise-fade {
  animation: riseAndFade 1.8s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

@keyframes riseAndFade {
  0% {
    opacity: 0;
    transform: translateY(150px) scale(0.5);
  }

  40% {
    opacity: 1;
    transform: translateY(0px) scale(1.2);
  }

  100% {
    opacity: 0;
    transform: translateY(-100px) scale(0.8);
  }
}

body {
  opacity: 0;
  transition: opacity 0.25s ease-in;
}

/* CSS Bổ sung để chỉnh nút Setting nằm gọn trong Topbar */
.topbar-right {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 15px;
}

.settings-container {
  position: relative;
  display: flex;
  align-items: center;
}

/* Style cho menu dropdown */
.settings-dropdown {
  position: absolute;
  top: 45px;
  right: 0;
  width: 260px;
  background: var(--card, #fff);
  border: 1px solid var(--border, #ddd);
  border-radius: 8px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
  padding: 12px;
  display: none;
  flex-direction: column;
  gap: 8px;
  z-index: 1000;
}

.settings-dropdown.show {
  display: flex;
  animation: slideDown 0.2s ease-out;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.setting-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 500;
  color: var(--fg, #333);
  font-size: 0.95rem;
}

.setting-item i {
  width: 20px;
  text-align: center;
  margin-right: 8px;
  color: var(--muted, #888);
}

/* Nút Bánh Răng */
.icon-btn {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid var(--border, #ccc);
  background: var(--bg, #fff);
  color: var(--fg, #333);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s;
  font-size: 1.1rem;
}

.icon-btn:hover {
  background: var(--accent, #3b82f6);
  color: #fff;
  border-color: var(--accent, #3b82f6);
  transform: rotate(45deg);
}

/* ========================================================== */
/* FIX LỖI KHÔNG NHẬP ĐƯỢC DANH SÁCH VECTOR (QUAN TRỌNG) */
/* ========================================================== */

/* 1. Mở khóa tương tác cho Math-field */
math-field.vec-math-input,
.vec-item math-field {
  user-select: text !important;
  -webkit-user-select: text !important;
  pointer-events: auto !important;
  cursor: text !important;
  touch-action: manipulation !important;

  /* Đảm bảo nó nổi lên trên để nhận click */
  position: relative !important;
  z-index: 10 !important;

  /* Fix màu text hiển thị rõ ràng */
  color: var(--fg) !important;
  opacity: 1 !important;
}

/* 2. Cho phép chọn văn bản trong các phần tử nội bộ của MathLive */
math-field::part(content),
math-field::part(container) {
  user-select: text !important;
  -webkit-user-select: text !important;
  cursor: text !important;
}

/* 3. Ngăn thẻ cha (.vec-item) chặn sự kiện của con */
.vec-item,
.vec-header {
  user-select: auto !important;
  pointer-events: auto !important;
}

/* 4. Fix lỗi hiển thị màu trong chế độ tối (Dark Mode) cho ô nhập này */
body.dark math-field.vec-math-input {
  background-color: rgba(255, 255, 255, 0.08) !important;
  border-color: rgba(255, 255, 255, 0.2) !important;
  color: #fff !important;
  --caret-color: #fff !important;
}