/* ══════════════════════════════════════
   TEACHER.CSS — Teacher area styles
══════════════════════════════════════ */

/* ─── Lock screen ─── */
.lock-screen {
  padding: 60px 22px 40px;
  display: flex; flex-direction: column; align-items: center; text-align: center;
}
.lock-icon {
  width: 72px; height: 72px; background: var(--blue); border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 30px; margin-bottom: 24px;
}
.lock-title { font-size: 22px; font-weight: 900; color: var(--black); margin-bottom: 8px; }
.lock-sub { font-size: 12px; color: var(--mid); line-height: 1.6; margin-bottom: 32px; }
.lock-input {
  width: 100%; padding: 14px 18px; border: 1.5px solid var(--border); border-radius: 12px;
  font-size: 16px; font-family: 'Montserrat', sans-serif; color: var(--text);
  background: var(--off); outline: none; text-align: center; letter-spacing: 4px;
  margin-bottom: 12px;
}
.lock-input:focus { border-color: var(--blue); background: var(--white); }
.lock-btn {
  width: 100%; padding: 14px; background: var(--blue); color: var(--white);
  border: none; border-radius: 12px; font-size: 12px; font-weight: 700;
  letter-spacing: 1.5px; text-transform: uppercase; cursor: pointer;
  font-family: 'Montserrat', sans-serif; transition: background 0.15s;
}
.lock-btn:hover { background: #153d6a; }
.lock-error { font-size: 11px; color: var(--red); margin-top: 8px; font-weight: 600; display: none; }

/* ─── Teacher sub-nav ─── */
.teacher-subnav {
  display: flex; gap: 0; padding: 0 22px;
  border-bottom: 1px solid var(--border); overflow-x: auto;
  scrollbar-width: none;
}
.teacher-subnav::-webkit-scrollbar { display: none; }
.t-tab {
  flex-shrink: 0; padding: 14px 16px; font-size: 10px; font-weight: 700;
  letter-spacing: 1px; text-transform: uppercase; color: var(--mid);
  background: none; border: none; cursor: pointer; font-family: 'Montserrat', sans-serif;
  border-bottom: 2px solid transparent; margin-bottom: -1px; transition: color 0.15s;
  white-space: nowrap;
}
.t-tab.active { color: var(--blue); border-bottom-color: var(--blue); }

/* ─── Teacher hero ─── */
.teacher-hero {
  padding: 32px 22px 28px; border-bottom: 1px solid var(--border);
  position: relative; overflow: hidden;
}
.teacher-hero::before { content: ''; position: absolute; left: 0; top: 0; width: 4px; height: 100%; background: var(--blue); }
.teacher-eyebrow {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 9px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase;
  color: var(--blue); margin-bottom: 14px;
}
.teacher-eyebrow::before { content: ''; width: 16px; height: 2px; background: var(--blue); display: block; }

/* ─── Stats row ─── */
.stats-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; padding: 0 22px; }
.stat-card { background: var(--off); border: 1px solid var(--border); border-radius: 12px; padding: 14px 10px; text-align: center; }
.stat-n2 { font-size: 22px; font-weight: 900; color: var(--blue); line-height: 1; }
.stat-l2 { font-size: 10px; color: var(--mid); margin-top: 4px; font-weight: 400; }

/* ─── Class cards ─── */
.class-list { padding: 0 22px; display: flex; flex-direction: column; gap: 10px; }
.class-card { background: var(--white); border: 1px solid var(--border); border-radius: 14px; overflow: hidden; cursor: pointer; transition: transform 0.15s; }
.class-card:hover { transform: translateY(-2px); box-shadow: 0 4px 16px rgba(0,0,0,0.06); }
.class-card-head { display: flex; align-items: center; gap: 14px; padding: 16px 18px; border-bottom: 1px solid var(--border); }
.class-color-bar { width: 4px; height: 44px; border-radius: 2px; flex-shrink: 0; }
.class-info { flex: 1; }
.class-name { font-size: 15px; font-weight: 900; color: var(--black); }
.class-meta { font-size: 10px; color: var(--mid); margin-top: 2px; font-weight: 400; }
.class-count { font-size: 20px; font-weight: 900; color: var(--blue); }
.class-count-l { font-size: 9px; color: var(--mid); font-weight: 400; text-align: right; }
.class-foot { display: flex; gap: 8px; padding: 12px 18px; flex-wrap: wrap; }
.topic-pill { font-size: 9px; font-weight: 700; letter-spacing: 1px; text-transform: uppercase; padding: 4px 10px; border-radius: 20px; background: var(--off); color: var(--mid); border: 1px solid var(--border); }
.topic-pill.done { background: #e8f5ee; color: var(--green); border-color: #c3e6d0; }

/* ─── Student rows ─── */
.student-list { padding: 0 22px; display: flex; flex-direction: column; gap: 8px; }
.student-row { background: var(--off); border: 1px solid var(--border); border-radius: 12px; padding: 12px 16px; display: flex; align-items: center; gap: 12px; cursor: pointer; transition: transform 0.12s; }
.student-row:hover { transform: translateY(-2px); box-shadow: 0 4px 16px rgba(0,0,0,0.05); }
.avatar { width: 36px; height: 36px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 12px; font-weight: 900; flex-shrink: 0; color: var(--white); }
.student-body { flex: 1; }
.student-name { font-size: 13px; font-weight: 700; color: var(--text); }
.student-meta { font-size: 10px; color: var(--mid); margin-top: 2px; font-weight: 400; }
.attendance-badge { font-size: 10px; font-weight: 700; padding: 3px 9px; border-radius: 20px; flex-shrink: 0; }
.att-good { background: #e8f5ee; color: var(--green); }
.att-warn { background: #fff8e6; color: var(--orange); }
.att-bad { background: #fdecea; color: var(--red); }

/* ─── Detail pages ─── */
.detail-hero { padding: 28px 22px 24px; border-bottom: 1px solid var(--border); position: relative; }
.back-btn {
  display: inline-flex; align-items: center; gap: 6px; font-size: 10px; font-weight: 700;
  letter-spacing: 1px; text-transform: uppercase; color: var(--mid);
  background: none; border: none; cursor: pointer; font-family: 'Montserrat', sans-serif;
  margin-bottom: 16px; padding: 0;
}
.back-btn:hover { color: var(--blue); }
.detail-title { font-size: 26px; font-weight: 900; color: var(--black); line-height: 1.1; letter-spacing: -0.5px; }
.detail-sub { font-size: 12px; color: var(--mid); margin-top: 6px; line-height: 1.6; }

/* ─── Inner tabs ─── */
.inner-tabs { display: flex; padding: 0 22px; border-bottom: 1px solid var(--border); overflow-x: auto; scrollbar-width: none; }
.inner-tabs::-webkit-scrollbar { display: none; }
.i-tab {
  flex-shrink: 0; padding: 13px 14px; font-size: 10px; font-weight: 700;
  letter-spacing: 1px; text-transform: uppercase; color: var(--mid);
  background: none; border: none; cursor: pointer; font-family: 'Montserrat', sans-serif;
  border-bottom: 2px solid transparent; margin-bottom: -1px; transition: color 0.15s;
}
.i-tab.active { color: var(--blue); border-bottom-color: var(--blue); }

/* ─── Checklist ─── */
.checklist { padding: 0 22px; display: flex; flex-direction: column; gap: 6px; }
.check-item { display: flex; align-items: center; gap: 12px; padding: 12px 16px; background: var(--off); border: 1px solid var(--border); border-radius: 10px; cursor: pointer; transition: background 0.15s; }
.check-item:hover { background: #f0f0ee; }
.check-item.checked { background: #e8f5ee; border-color: #c3e6d0; }
.check-box { width: 20px; height: 20px; border-radius: 5px; border: 2px solid var(--border); flex-shrink: 0; display: flex; align-items: center; justify-content: center; font-size: 11px; color: var(--white); transition: all 0.15s; }
.check-item.checked .check-box { background: var(--green); border-color: var(--green); }
.check-label { font-size: 12px; font-weight: 600; color: var(--text); flex: 1; }
.check-item.checked .check-label { color: var(--green); }
.check-date { font-size: 9px; color: var(--mid); font-weight: 400; }

/* ─── Progress ─── */
.progress-wrap { padding: 0 22px; }
.progress-bar-outer { background: var(--border); border-radius: 10px; height: 8px; overflow: hidden; }
.progress-bar-inner { height: 100%; border-radius: 10px; background: var(--blue); transition: width 0.4s; }
.progress-label { display: flex; justify-content: space-between; font-size: 10px; color: var(--mid); margin-bottom: 6px; font-weight: 600; }

/* ─── Notes ─── */
.notes-area { margin: 0 22px; }
.notes-field { width: 100%; min-height: 90px; border: 1px solid var(--border); border-radius: 12px; padding: 14px 16px; font-size: 12px; font-family: 'Montserrat', sans-serif; color: var(--text); background: var(--off); resize: vertical; outline: none; line-height: 1.6; }
.notes-field:focus { border-color: var(--blue); background: var(--white); }
.save-btn { margin-top: 8px; padding: 10px 20px; background: var(--blue); color: var(--white); border: none; border-radius: 10px; font-size: 10px; font-weight: 700; letter-spacing: 1px; text-transform: uppercase; cursor: pointer; font-family: 'Montserrat', sans-serif; transition: background 0.15s; }
.save-btn:hover { background: #153d6a; }
.save-btn.saved { background: var(--green); }

/* ─── Grades ─── */
.grade-grid { padding: 0 22px; display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.grade-card { background: var(--off); border: 1px solid var(--border); border-radius: 12px; padding: 14px; }
.grade-title { font-size: 10px; font-weight: 700; color: var(--mid); letter-spacing: 1px; text-transform: uppercase; margin-bottom: 8px; }
.grade-input-row { display: flex; align-items: center; gap: 8px; }
.grade-input { width: 60px; padding: 7px 10px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px; font-weight: 900; font-family: 'Montserrat', sans-serif; color: var(--blue); text-align: center; outline: none; background: var(--white); }
.grade-input:focus { border-color: var(--blue); }
.grade-max { font-size: 11px; color: var(--mid); font-weight: 400; }

/* ─── Modals ─── */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.4); z-index: 200; display: flex; align-items: flex-end; justify-content: center; opacity: 0; pointer-events: none; transition: opacity 0.2s; }
.modal-overlay.open { opacity: 1; pointer-events: all; }
.modal { background: var(--white); border-radius: 20px 20px 0 0; padding: 24px 22px 40px; width: 100%; max-width: 480px; transform: translateY(20px); transition: transform 0.2s; max-height: 90vh; overflow-y: auto; }
.modal-overlay.open .modal { transform: translateY(0); }
.modal-title { font-size: 18px; font-weight: 900; color: var(--black); margin-bottom: 4px; }
.modal-sub { font-size: 11px; color: var(--mid); margin-bottom: 20px; font-weight: 400; }
.form-group { margin-bottom: 14px; }
.form-label { font-size: 9px; font-weight: 700; letter-spacing: 1.5px; text-transform: uppercase; color: var(--mid); margin-bottom: 6px; display: block; }
.form-input { width: 100%; padding: 11px 14px; border: 1px solid var(--border); border-radius: 10px; font-size: 13px; font-family: 'Montserrat', sans-serif; color: var(--text); background: var(--off); outline: none; }
.form-input:focus { border-color: var(--blue); background: var(--white); }
.modal-actions { display: flex; gap: 10px; margin-top: 20px; }
.btn-primary { flex: 1; padding: 13px; background: var(--blue); color: var(--white); border: none; border-radius: 12px; font-size: 12px; font-weight: 700; letter-spacing: 1px; text-transform: uppercase; cursor: pointer; font-family: 'Montserrat', sans-serif; }
.btn-cancel { padding: 13px 18px; background: var(--off); border: 1px solid var(--border); border-radius: 12px; font-size: 12px; font-weight: 600; cursor: pointer; font-family: 'Montserrat', sans-serif; color: var(--mid); }

/* ─── Teacher sub-pages ─── */
.t-subpage { display: none; }
.t-subpage.active { display: block; }

/* ─── Empty state ─── */
.empty-state { padding: 20px 0; color: var(--mid); font-size: 12px; text-align: center; }