/* Thuộc tính hidden phải thắng mọi display của CSS bên dưới
   (nếu không, màn hình đăng nhập vẫn hiện dù đã mở khoá) */
[hidden] { display: none !important; }

/* Giao diện trang quản lý — trắng đen, dùng chung biến màu với styles.css */

.admin { max-width: 760px; margin: 0 auto; padding: 20px 16px 60px; display: grid; gap: 18px; }

.card { padding: 20px; border: 1px solid var(--line); background: var(--paper); }
.card h2 { font-size: 15px; font-weight: 600; letter-spacing: -.2px; margin-bottom: 16px; }
.card-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; flex-wrap: wrap; }
.card-head h2 { margin-bottom: 0; }
.pill {
  display: inline-block; min-width: 22px; padding: 2px 8px; border-radius: 999px;
  font-size: 12px; font-weight: 500; color: var(--ink-soft); border: 1px solid var(--line);
}
.hint { color: var(--ink-soft); font-size: 13px; line-height: 1.55; }

/* Form thêm mới */
.form { display: grid; gap: 14px; }
.form label { display: grid; gap: 6px; font-size: 12px; font-weight: 500; color: var(--ink-soft); }
.form input[type="text"], .form select, .form textarea, .sync-row input {
  padding: 11px 12px; border-radius: 2px; font-size: 14px; font-family: inherit;
  color: var(--ink); background: var(--paper); border: 1px solid var(--line);
}
.form input:focus, .form select:focus, .form textarea:focus, .sync-row input:focus {
  outline: none; border-color: var(--ink);
}
.form input[type="file"] { font-size: 12px; color: var(--ink-soft); }
.preview {
  width: 88px; height: 88px; background-size: cover; background-position: center;
  border: 1px dashed var(--line);
}
.preview.has-image { border: 1px solid var(--line-strong); border-style: solid; }

/* Danh sách */
.list { display: grid; gap: 8px; }
.row {
  display: grid; grid-template-columns: 52px 1fr auto; gap: 12px; align-items: center;
  padding: 10px; border: 1px solid var(--line);
}
.row.is-off { opacity: .4; }
.row-thumb {
  width: 52px; height: 52px; background-size: cover; background-position: center;
  display: grid; place-items: center; font-size: 20px; font-weight: 300; color: var(--ink);
  border: 1px solid var(--line);
}
.row-main { display: grid; gap: 6px; min-width: 0; overflow: hidden; }
.row-meta { display: flex; gap: 6px; min-width: 0; }
.row-name, .row-note, .row-group {
  padding: 7px 9px; border-radius: 2px; font-size: 13px; font-family: inherit;
  color: var(--ink); background: var(--paper); border: 1px solid transparent; min-width: 0;
}
.row-note {
  flex: 1 1 0; min-width: 0; text-align: left; cursor: pointer; color: var(--ink-soft);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; display: block;
}
.row-note:hover { border-color: var(--ink); color: var(--ink); }
.row-note-empty { font-style: italic; opacity: .7; }
.row-name { font-weight: 600; }
.row-name:hover, .row-note:hover, .row-group:hover { border-color: var(--line); }
.row-name:focus, .row-note:focus, .row-group:focus { border-color: var(--ink); outline: none; }
.row-group { flex: 0 0 130px; }

.row-actions { display: flex; gap: 4px; }
.icon-btn {
  min-width: 44px; height: 32px; padding: 0 10px; display: grid; place-items: center; cursor: pointer;
  border: 1px solid var(--line); border-radius: 2px; font-size: 12px; font-family: inherit;
  background: var(--paper); color: var(--ink-soft);
}
.icon-btn:hover { color: var(--ink); }
.icon-btn:hover { border-color: var(--ink); }
.icon-btn.danger:hover { color: var(--paper); background: var(--ink); }

.tools { display: flex; gap: 6px; flex-wrap: wrap; }
.btn-sm {
  padding: 7px 12px; border-radius: 2px; cursor: pointer; font-size: 12px;
  color: var(--ink-soft); background: var(--paper); border: 1px solid var(--line);
}
.btn-sm:hover { color: var(--ink); border-color: var(--ink); }

/* Đồng bộ */
.sync-row { display: flex; gap: 8px; margin-top: 14px; flex-wrap: wrap; }
.sync-row input { flex: 1; min-width: 160px; }
.sync-row .btn { flex: 0 0 auto; padding: 11px 20px; }
.status { margin-top: 10px; font-size: 13px; color: var(--ink-soft); min-height: 18px; }
.status.ok { color: var(--ink); font-weight: 500; }
.status.warn { color: var(--ink); font-weight: 500; }

@media (max-width: 560px) {
  .row { grid-template-columns: 44px 1fr; }
  .row-thumb { width: 44px; height: 44px; }
  .row-meta { flex-direction: column; min-width: 0; }
  .row-group { flex: 1; }
  .row-actions { grid-column: 1 / -1; justify-content: flex-end; }
}

/* Bật/tắt hiển thị khoá học trên vòng quay */
.group-list { display: grid; gap: 8px; margin-top: 14px; }
.group-row {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 12px 14px; border: 1px solid var(--line);
}
.group-row.is-off { opacity: .5; }
.group-info { display: grid; gap: 2px; min-width: 0; }
.group-info strong { font-size: 14px; font-weight: 600; }
.group-info span { font-size: 12px; color: var(--ink-soft); }
.group-row .btn-sm { flex: 0 0 auto; }

/* Hàng khoá học: tên sửa trực tiếp, kèm nút ẩn/xoá */
.group-row {
  display: grid; grid-template-columns: minmax(0, 1fr) auto auto; align-items: center; gap: 12px;
}
.group-name {
  padding: 8px 10px; border-radius: 2px; font-size: 14px; font-weight: 600; font-family: inherit;
  color: var(--ink); background: var(--paper); border: 1px solid transparent; min-width: 0;
}
.group-name:hover { border-color: var(--line); }
.group-name:focus { border-color: var(--ink); outline: none; }
.group-count { font-size: 12px; color: var(--ink-soft); white-space: nowrap; }
.group-actions { display: flex; gap: 6px; }
.group-actions .btn-sm[disabled] { opacity: .4; cursor: not-allowed; }

.group-add { display: flex; gap: 8px; margin-top: 12px; }
.group-add input {
  flex: 1; min-width: 0; padding: 10px 12px; border-radius: 2px; font-size: 14px; font-family: inherit;
  color: var(--ink); background: var(--paper); border: 1px solid var(--line);
}
.group-add input:focus { border-color: var(--ink); outline: none; }
.group-add .btn-sm { flex: 0 0 auto; padding: 10px 16px; }

/* Danh sách kiểu tóc gom theo khoá học */
.group-section { margin-top: 18px; }
.group-section:first-child { margin-top: 0; }
.group-section h3 {
  font-size: 12px; font-weight: 600; letter-spacing: 1.2px; text-transform: uppercase;
  color: var(--ink-soft); padding-bottom: 8px; margin-bottom: 10px;
  border-bottom: 1px solid var(--line);
}
.group-section h3 span { font-weight: 400; text-transform: none; letter-spacing: 0; }

/* ---------- Màn hình đăng nhập ---------- */
.login-gate {
  min-height: calc(100dvh - 68px);
  display: grid; place-items: center; padding: 24px;
}
.login-box {
  width: 100%; max-width: 360px; display: grid; gap: 14px;
  padding: 32px 28px; border: 1px solid var(--line); background: var(--paper);
}
.login-box .brand-mark { justify-self: center; width: 44px; height: 44px; font-size: 15px; }
.login-box h1 { font-size: 20px; font-weight: 600; text-align: center; letter-spacing: -.3px; }
.login-box .hint { text-align: center; margin-top: -8px; margin-bottom: 4px; }
.login-box label { display: grid; gap: 6px; font-size: 12px; font-weight: 500; color: var(--ink-soft); }
.login-box input {
  padding: 12px; border-radius: 2px; font-size: 15px; font-family: inherit;
  color: var(--ink); background: var(--paper); border: 1px solid var(--line);
}
.login-box input:focus { border-color: var(--ink); outline: none; }
.login-box .btn { margin-top: 6px; }
.login-error { min-height: 18px; font-size: 13px; color: #b91c1c; text-align: center; }

/* ---------- Xem ảnh lớn từ danh sách ---------- */
.row-thumb.is-clickable { cursor: zoom-in; }
.row-thumb.is-clickable:hover { outline: 2px solid var(--ink); outline-offset: 1px; }

.lightbox {
  position: fixed; inset: 0; z-index: 80;
  display: grid; place-items: center; padding: 28px;
  background: rgba(255, 255, 255, .96);
  animation: fadeLb .16s ease;
}
@keyframes fadeLb { from { opacity: 0 } to { opacity: 1 } }

.lightbox-inner { display: grid; gap: 12px; justify-items: center; max-height: 100%; }
.lightbox-photo {
  width: min(78vw, 620px); height: min(80dvh, 900px);
  background-size: contain; background-position: center; background-repeat: no-repeat;
  background-color: var(--paper-soft); border: 1px solid var(--line);
}
.lightbox-name { font-size: 16px; font-weight: 600; text-align: center; }
.lightbox-close {
  position: absolute; top: 16px; right: 20px; width: 40px; height: 40px;
  border: 1px solid var(--line); border-radius: 50%; cursor: pointer;
  font-size: 24px; line-height: 1; color: var(--ink); background: var(--paper);
}
.lightbox-close:hover { color: var(--paper); background: var(--ink); }


/* ---------- Bảng sửa kiểu tóc ---------- */
.editor {
  position: fixed; inset: 0; z-index: 80;
  display: grid; place-items: center; padding: 24px;
  background: rgba(255, 255, 255, .96);
  animation: fadeEd .16s ease;
}
@keyframes fadeEd { from { opacity: 0 } to { opacity: 1 } }

.editor-box {
  position: relative; width: min(1000px, 96vw); max-height: 92dvh; overflow-y: auto;
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(280px, 380px); gap: 28px;
  padding: 24px; background: var(--paper); border: 1px solid var(--line-strong);
}
.editor-photo {
  width: 100%; height: min(74dvh, 700px);
  background-size: contain; background-position: center; background-repeat: no-repeat;
  background-color: var(--paper-soft); border: 1px solid var(--line);
  display: grid; place-items: center; font-size: 14px; color: var(--ink-soft);
}
.editor-form { display: grid; gap: 14px; align-content: center; }
.editor-form label { display: grid; gap: 6px; font-size: 12px; font-weight: 500; color: var(--ink-soft); }
.editor-form input, .editor-form select, .editor-form textarea {
  padding: 11px 12px; border-radius: 2px; font-size: 15px; font-family: inherit; line-height: 1.55;
  color: var(--ink); background: var(--paper); border: 1px solid var(--line); resize: vertical;
}
.editor-form input:focus, .editor-form select:focus, .editor-form textarea:focus {
  border-color: var(--ink); outline: none;
}
.editor-actions { display: flex; gap: 10px; margin-top: 6px; }
.editor-close {
  position: absolute; top: 10px; right: 12px; width: 34px; height: 34px;
  border: 0; border-radius: 50%; cursor: pointer; font-size: 22px; line-height: 1;
  color: var(--ink-soft); background: transparent;
}
.editor-close:hover { color: var(--ink); }

@media (max-width: 860px) {
  .editor { padding: 12px; }
  .editor-box { grid-template-columns: 1fr; gap: 16px; padding: 18px; }
  .editor-photo { height: min(44dvh, 380px); }
}

/* ---------- Logo và tên hiển thị ---------- */
.brand-row { display: flex; gap: 20px; align-items: flex-start; margin-top: 14px; flex-wrap: wrap; }
.brand-preview {
  flex: 0 0 auto; width: 84px; height: 84px; border-radius: 50%;
  display: grid; place-items: center; font-size: 26px; font-weight: 700; letter-spacing: .5px;
  color: var(--paper); background: var(--ink);
  background-size: cover; background-position: center;
}
.brand-preview.has-logo { background-color: var(--paper-soft); border: 1px solid var(--line); }
.brand-fields { flex: 1; min-width: 240px; display: grid; gap: 12px; }
.brand-fields label { display: grid; gap: 6px; font-size: 12px; font-weight: 500; color: var(--ink-soft); }
.brand-fields input {
  padding: 10px 12px; border-radius: 2px; font-size: 14px; font-family: inherit;
  color: var(--ink); background: var(--paper); border: 1px solid var(--line);
}
.brand-fields input:focus { border-color: var(--ink); outline: none; }
.brand-actions { display: flex; gap: 8px; }
.brand-upload { cursor: pointer; }

/* Thêm nhiều ảnh một lượt */
.bulk-add {
  margin-top: 18px; padding-top: 16px; border-top: 1px solid var(--line);
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
}
.bulk-add .hint { flex: 1 1 100%; margin-bottom: 2px; }
.bulk-btn { cursor: pointer; padding: 10px 16px; }
.bulk-status { font-size: 13px; color: var(--ink-soft); }

/* ---------- Nội dung luyện tập (tình huống, thẻ ôn bài) ---------- */
.content-list { display: grid; gap: 10px; margin-top: 14px; }
.content-row {
  display: grid; grid-template-columns: 30px minmax(0, 1fr) auto; gap: 12px; align-items: start;
  padding: 12px; border: 1px solid var(--line);
}
.content-no {
  width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center;
  font-size: 12px; font-weight: 600; color: var(--paper); background: var(--ink); margin-top: 4px;
}
.content-body { display: grid; gap: 8px; min-width: 0; }
.content-input {
  width: 100%; padding: 9px 10px; border-radius: 2px; font-size: 14px; font-family: inherit;
  line-height: 1.55; color: var(--ink); background: var(--paper); border: 1px solid var(--line);
  resize: vertical;
}
.content-input:nth-child(2) { color: var(--ink-soft); font-size: 13px; }
.content-input:focus { border-color: var(--ink); outline: none; }
.content-row .btn-sm { margin-top: 4px; }
.content-row .btn-sm.danger:hover { color: var(--paper); background: var(--ink); }

/* Bật/tắt phần luyện tập */
.section-name { font-size: 14px; font-weight: 600; }