/* ── Buttons ─────────────────────────────────────────────────────────────── */
button { cursor: pointer; font-family: inherit; }

.auth-tab:hover,
.btn-gradient:hover,
.nav-item:hover,
.btn-upload-sidebar:hover,
.btn-card:hover,
.btn-like:hover,
.btn-comment-toggle:hover,
.btn-comment-like:hover,
.btn-reply-toggle:hover,
.btn-expand-replies:hover,
.btn-send:hover,
.btn-edit-desc:hover,
.btn-cancel-desc:hover,
.btn-back:hover,
.btn-icon-close:hover {
  transform: translateY(-1px);
}

.auth-tab:active,
.btn-gradient:active,
.nav-item:active,
.btn-upload-sidebar:active,
.btn-card:active,
.btn-like:active,
.btn-comment-toggle:active,
.btn-comment-like:active,
.btn-reply-toggle:active,
.btn-expand-replies:active,
.btn-send:active,
.btn-edit-desc:active,
.btn-cancel-desc:active,
.btn-back:active,
.btn-icon-close:active {
  transform: translateY(0);
}

.btn-gradient {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  background: var(--accent);
  color: var(--button-text);
  border: none;
  border-radius: 999px;
  font-size: .92rem;
  font-weight: 600;
  transition: transform .18s, box-shadow .22s, background .22s, color .22s;
  box-shadow: 0 0 20px rgba(245,213,98,.25);
}
.btn-gradient:hover { background: #E0C550; color: var(--button-text); box-shadow: 0 0 30px rgba(245,213,98,.4); }
.btn-gradient:active { transform: translateY(0); }
.btn-gradient svg { width: 16px; height: 16px; }

.btn-full { width: 100%; margin-top: 4px; }

.btn-card {
  flex: 1;
  min-width: 0;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: .73rem;
  font-weight: 600;
  border: 1px solid transparent;
  background: var(--accent);
  color: var(--button-text);
  transition: transform .18s, box-shadow .22s, background .22s, color .22s, border-color .22s;
  white-space: nowrap;
  box-shadow: 0 0 16px rgba(245,213,98,.2);
}
.btn-card:hover { background: #E0C550; box-shadow: 0 0 22px rgba(245,213,98,.35); }
.btn-preview {
  flex: 0 0 auto;
  background: var(--accent);
  color: var(--button-text);
  box-shadow: 0 0 20px rgba(245,213,98,.25);
}
.btn-preview:hover { background: #E0C550; box-shadow: 0 0 30px rgba(245,213,98,.4); }

.btn-toggle {
  flex: 0 0 auto;
  min-width: 80px;
  padding: 9px 16px;
  background: rgba(232,232,240,.06);
  border-color: var(--border);
  color: var(--text-muted);
}
.btn-toggle:hover { background: rgba(245,213,98,.12); color: var(--accent); box-shadow: var(--button-shadow); }
.btn-toggle.is-public {
  background: rgba(16,185,129,.15);
  border-color: rgba(16,185,129,.3);
  color: #34d399;
}
.btn-toggle.is-public:hover { background: rgba(16,185,129,.25); }

.btn-edit {
  flex: 0 0 auto;
  background: rgba(232,232,240,.06);
  border-color: var(--border);
  color: var(--text-muted);
}
.btn-edit:hover { background: rgba(245,213,98,.12); color: var(--accent); }

.btn-delete {
  background: linear-gradient(105deg, rgba(255,221,226,.92), rgba(255,248,238,.88), rgba(239,247,252,.86));
  border-color: rgba(244,63,94,.18);
  color: #d94d67;
  flex: 0 0 auto;
}
.btn-delete:hover { background: linear-gradient(105deg, rgba(255,205,213,.98), rgba(255,245,235,.94), rgba(235,244,250,.92)); border-color: rgba(244,63,94,.3); }

.btn-send {
  padding: 9px 16px;
  background: var(--accent);
  color: var(--button-text);
  border: none;
  border-radius: 999px;
  font-size: .83rem;
  font-weight: 600;
  white-space: nowrap;
  transition: transform .18s, box-shadow .22s, background .22s, color .22s;
  box-shadow: 0 0 16px rgba(245,213,98,.2);
}
.btn-send:hover { background: #E0C550; box-shadow: 0 0 24px rgba(245,213,98,.35); }

/* ── Toggle ────────────────────────────────────────────────────────────────── */
.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  margin-bottom: 14px;
  cursor: pointer;
}
.toggle-label { font-size: .88rem; color: var(--text-dim); }

.pe-toggle { padding: 6px 0; margin-bottom: 6px; }

.toggle { position: relative; width: 44px; height: 24px; }
.toggle input { display: none; }
.toggle-track {
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, rgba(255,255,255,.1), rgba(235,244,250,.62));
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 12px;
  transition: all .25s;
  box-shadow: inset 0 1px 1px rgba(255,255,255,.1), 0 4px 10px rgba(0,0,0,.25);
}
.toggle-thumb {
  position: absolute;
  width: 18px; height: 18px;
  background: #fff;
  border-radius: 50%;
  top: 2px; left: 2px;
  box-shadow: 0 2px 5px rgba(0,0,0,.25);
  transition: all .25s;
}
.toggle input:checked ~ .toggle-track {
  background: var(--button-soft);
  border-color: rgba(255,255,255,.1);
}
.toggle input:checked ~ .toggle-track .toggle-thumb {
  transform: translateX(20px);
  background: #fff;
}

/* ── Upload Modal ──────────────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.45);
  backdrop-filter: blur(10px);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-card {
  width: 100%;
  max-width: 100%;
  background: var(--bg-elevated);
  border: 1px solid var(--border-accent);
  border-radius: 20px;
  padding: 28px;
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255,255,255,.1);
  backdrop-filter: blur(22px);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 22px;
}
.modal-header h3 { font-size: 1.05rem; font-weight: 700; }

.btn-icon-close {
  width: 30px; height: 30px;
  background: var(--button-soft);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 50%;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform .18s, box-shadow .22s, background .22s, color .22s;
  box-shadow: 0 7px 16px rgba(0,0,0,.25), inset 0 1px 1px rgba(255,255,255,.1);
}
.btn-icon-close svg { width: 14px; height: 14px; }
.btn-icon-close:hover { background: linear-gradient(105deg, rgba(255,218,224,.96), rgba(255,246,237,.9)); border-color: rgba(244,63,94,.22); color: #d94d67; }

/* ── Dropzone ──────────────────────────────────────────────────────────────── */
.dropzone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 28px 16px;
  margin-bottom: 14px;
  background: rgba(245,213,98,.07);
  border: 1.5px dashed rgba(245,213,98,.28);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all .2s;
}
.dropzone:hover { background: rgba(245,213,98,.13); border-color: rgba(245,213,98,.48); }
.dropzone input[type="file"] { display: none; }

.dropzone-icon { width: 36px; height: 36px; color: var(--accent-light); opacity: .7; }
.dropzone-text { font-size: .9rem; color: var(--text-dim); font-weight: 500; }
.dropzone-hint { font-size: .78rem; color: var(--text-muted); }
.dropzone.has-file { border-style: solid; border-color: rgba(245,213,98,.48); background: rgba(245,213,98,.13); }
.dropzone.has-file .dropzone-text { color: var(--accent-light); }

/* ── Toast Dialog ──────────────────────────────────────────────────────────── */
.toast-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.45);
  backdrop-filter: blur(8px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.toast-card {
  width: 100%;
  max-width: 100%;
  background: var(--bg-elevated);
  border: 1px solid var(--border-accent);
  border-radius: 18px;
  padding: 28px 26px 22px;
  text-align: center;
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255,255,255,.1);
  backdrop-filter: blur(22px);
  animation: fadeSlideIn .3s ease both;
}

.toast-msg {
  font-size: .95rem;
  color: var(--text-dim);
  line-height: 1.7;
  margin-bottom: 20px;
}

/* ── Profile Edit Avatar Row ─────────────────────────────────────────────── */
#profile-edit-modal .modal-card {
  max-width: 480px;
  max-height: 85vh;
  overflow-y: auto;
  margin: 0 auto;
  padding: 24px 28px 22px;
}

.profile-edit-avatar-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.pe-avatar-preview {
  width: 46px; height: 46px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border-accent);
}

.pe-avatar-btn {
  display: inline-block;
  position: relative;
  overflow: hidden;
  padding: 6px 14px;
  font-size: .78rem;
}
.pe-avatar-btn input[type="file"] { display: none; }

.pe-toggle { padding: 4px 0; margin-bottom: 4px; }

/* Compact form fields in profile edit */
#form-profile-edit .field { margin-bottom: 8px; }
#form-profile-edit .toggle-row { padding: 6px 0; margin-bottom: 6px; }
#form-profile-edit .btn-gradient { margin-top: 8px; }
#quiz-modal .modal-card { max-width: 480px; }

.quiz-form-section {
  position: relative;
  margin-bottom: 14px;
}

.quiz-form-title {
  width: 100%;
  padding: 13px 14px;
  background: rgba(255,255,255,.1);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: .95rem;
  font-weight: 600;
  outline: none;
  font-family: inherit;
  transition: border-color .2s, background .2s;
}
.quiz-form-title::placeholder { color: var(--text-muted); font-weight: 400; }
.quiz-form-title:focus { border-color: var(--accent-light); background: rgba(255,255,255,.1); }

.quiz-form-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  margin-bottom: 14px;
  background: rgba(255,255,255,.42);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: .85rem;
  color: var(--text-dim);
  transition: border-color .2s;
}
.quiz-form-toggle:hover { border-color: var(--accent-light); }

.quiz-form-row {
  display: flex;
  gap: 12px;
  margin-bottom: 14px;
}
.quiz-form-divider {
  width: 1px;
  background: var(--border);
  align-self: stretch;
  flex-shrink: 0;
}
.quiz-form-num {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.quiz-form-num-label {
  font-size: .8rem;
  color: var(--text-muted);
  display: block;
  text-align: center;
}
.quiz-modal-input-num {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: .92rem;
  font-weight: 600;
  background: rgba(255,255,255,.1);
  color: var(--text);
  outline: none;
  font-family: inherit;
  text-align: center;
  transition: border-color .2s, background .2s;
}
.quiz-modal-input-num:focus { border-color: var(--accent-light); background: rgba(255,255,255,.1); }
.quiz-modal-input-num::-webkit-inner-spin-button { opacity: 1; }

.quiz-modal-select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: .88rem;
  background: rgba(255,255,255,.1);
  color: var(--text);
  outline: none;
  font-family: inherit;
  cursor: pointer;
  transition: border-color .2s, background .2s;
  -webkit-appearance: none;
  appearance: none;
}
.quiz-modal-select:focus { border-color: var(--accent-light); background: rgba(255,255,255,.1); }

.quiz-modal-textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: .85rem;
  background: rgba(255,255,255,.1);
  color: var(--text);
  outline: none;
  font-family: inherit;
  resize: vertical;
  margin-bottom: 12px;
  transition: border-color .2s;
}
.quiz-modal-textarea:focus { border-color: var(--accent-light); }
.quiz-modal-textarea::placeholder { color: var(--text-muted); }

/* ── Classroom Check List ──────────────────────────────────────────── */
.quiz-classroom-checks {
  display: flex; flex-wrap: wrap; gap: 8px;
  padding: 10px 0; max-height: 160px; overflow-y: auto;
}
.classroom-check-item {
  display: flex; align-items: center; gap: 6px;
  padding: 6px 14px; background: rgba(255,255,255,.42);
  border: 1px solid var(--border); border-radius: 999px;
  font-size: .84rem; color: var(--text-dim); cursor: pointer;
  transition: all .15s; user-select: none;
}
.classroom-check-item:hover { border-color: var(--accent-light); background: rgba(245,213,98,.08); }
.classroom-check-item.checked { background: rgba(245,213,98,.14); border-color: var(--accent-light); color: var(--accent-light); font-weight: 600; }
.classroom-check-item input { display: none; }