/* css/components.css — Modal, Toast, and shared responsive utilities */

/* Notes Modal */
.notes-modal {
  position: fixed; inset: 0; z-index: 500;
  display: flex; align-items: center; justify-content: center;
}
.modal-backdrop {
  position: absolute; inset: 0;
  background: rgba(0,0,0,.6);
  backdrop-filter: blur(4px);
}
.modal-content {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  width: 90%; max-width: 500px;
  box-shadow: var(--shadow-lg);
  animation: fadeSlideUp .25s var(--ease);
}
.modal-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 14px;
}
.modal-header h3 {
  font-size: 15px; font-weight: 700;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  max-width: 80%;
}
.modal-close-btn {
  width: 30px; height: 30px;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--border); border-radius: var(--radius-xs);
  background: transparent; color: var(--text-muted);
  cursor: pointer; transition: all .15s var(--ease);
}
.modal-close-btn:hover { border-color: var(--danger); color: var(--danger); }

/* Rich Text Editor */
.modal-notes-editor { max-width: 600px; }

.notes-toolbar {
  display: flex; align-items: center; gap: 2px;
  padding: 6px 8px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-bottom: none;
  border-radius: var(--radius-xs) var(--radius-xs) 0 0;
  flex-wrap: wrap;
}
.toolbar-btn {
  width: 30px; height: 28px;
  display: flex; align-items: center; justify-content: center;
  border: none; border-radius: 4px;
  background: transparent; color: var(--text-sec);
  cursor: pointer; font-size: 13px; font-family: inherit;
  transition: all .12s var(--ease);
}
.toolbar-btn:hover { background: var(--bg-hover); color: var(--text); }
.toolbar-btn:active { background: var(--bg-surface); }
.toolbar-sep {
  width: 1px; height: 18px;
  background: var(--border); margin: 0 4px;
}
.toolbar-heading-select {
  padding: 3px 6px;
  background: var(--bg); border: 1px solid var(--border); border-radius: 4px;
  color: var(--text-sec); font-size: 11px; font-family: inherit;
  cursor: pointer;
}

.notes-editor {
  width: 100%; min-height: 200px; max-height: 400px;
  overflow-y: auto; resize: none;
  background: var(--bg); border: 1px solid var(--border);
  border-radius: 0 0 var(--radius-xs) var(--radius-xs);
  color: var(--text); padding: 14px; font-size: 13.5px; font-family: inherit;
  line-height: 1.7; outline: none;
  transition: border-color var(--dur) var(--ease);
}
.notes-editor:focus { border-color: var(--ras); }
.notes-editor:empty::before {
  content: attr(data-placeholder);
  color: var(--text-muted); font-style: italic;
  pointer-events: none;
}
/* Rich text inside editor */
.notes-editor h1 { font-size: 20px; font-weight: 700; margin: 8px 0 4px; color: var(--text); }
.notes-editor h2 { font-size: 17px; font-weight: 700; margin: 6px 0 3px; color: var(--text); }
.notes-editor h3 { font-size: 15px; font-weight: 600; margin: 5px 0 2px; color: var(--text-sec); }
.notes-editor ul, .notes-editor ol { padding-left: 20px; margin: 4px 0; }
.notes-editor li { margin-bottom: 2px; }
.notes-editor pre {
  background: var(--bg-card-2); border: 1px solid var(--border);
  border-radius: 6px; padding: 10px 12px; font-family: 'Consolas', monospace;
  font-size: 12.5px; overflow-x: auto; margin: 6px 0;
}
.notes-editor mark, .notes-editor span[style*="background"] {
  border-radius: 2px; padding: 1px 3px;
}

.notes-hint {
  font-size: 11px; color: var(--text-muted);
}

.modal-actions {
  display: flex; justify-content: flex-end; gap: 8px; margin-top: 14px;
}
.btn-primary {
  padding: 8px 20px; border: none; border-radius: var(--radius-xs);
  background: var(--grad-ras); color: white;
  font-size: 13px; font-weight: 600; font-family: inherit;
  cursor: pointer; transition: all var(--dur) var(--ease);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: var(--shadow-glow-ras); }

/* Toast notifications */
.toast-container {
  position: fixed; bottom: 24px; right: 24px;
  z-index: 900;
  display: flex; flex-direction: column; gap: 8px;
  pointer-events: none;
}
.toast-message {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 3px solid var(--gk);
  border-radius: var(--radius-xs);
  padding: 12px 18px;
  font-size: 13px; font-weight: 500;
  color: var(--text);
  box-shadow: var(--shadow-md);
  transform: translateX(120%);
  opacity: 0;
  transition: all .35s var(--ease);
  pointer-events: auto;
  max-width: 340px;
}
.toast-message.show { transform: translateX(0); opacity: 1; }
.toast-message.toast-success { border-left-color: var(--gk); }
.toast-message.toast-info    { border-left-color: var(--ras); }
.toast-message.toast-warning { border-left-color: var(--sci); }

@media (max-width: 640px) {
  .toast-container { bottom: 68px; right: 12px; left: 12px; }
  .toast-message { max-width: none; }
}

/* ==================== STUDY HUB MODAL ==================== */
.hub-modal-content {
  width: 90%; max-width: 960px;
  height: 82vh; max-height: 720px;
  display: flex; flex-direction: column;
  padding: 0; overflow: hidden;
}

.hub-modal-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
  background: var(--bg-card-2);
}
.hub-header-titles { min-width: 0; }
.hub-breadcrumb { font-size: 11px; color: var(--text-muted); display: block; font-weight: 500; }
.hub-topic-title { font-size: 16px; font-weight: 700; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.hub-header-actions { display: flex; align-items: center; gap: 10px; }
.btn-primary-sm {
  display: flex; align-items: center; gap: 6px;
  padding: 6px 14px; border: none; border-radius: var(--radius-xs);
  background: var(--grad-ras); color: white; font-size: 12px; font-weight: 600;
  cursor: pointer; transition: all var(--dur) var(--ease);
}
.btn-primary-sm:hover { transform: translateY(-1px); box-shadow: var(--shadow-glow-ras); }
.btn-secondary-sm {
  padding: 6px 12px; border: 1px solid var(--border); border-radius: var(--radius-xs);
  background: transparent; color: var(--text-sec); font-size: 12px; font-weight: 500;
  cursor: pointer; transition: all var(--dur) var(--ease);
}
.btn-secondary-sm:hover { border-color: var(--text-muted); color: var(--text); }

.hub-modal-body {
  display: flex; flex: 1; min-height: 0; overflow: hidden;
}

/* Sidebar */
.hub-sidebar {
  width: 260px; flex-shrink: 0;
  border-right: 1px solid var(--border);
  background: var(--bg-card);
  display: flex; flex-direction: column;
}
.hub-sidebar-label {
  padding: 12px 16px 6px 16px;
  font-size: 10px; font-weight: 800; color: var(--text-muted);
  letter-spacing: 0.8px;
}
.hub-items-list {
  flex: 1; overflow-y: auto; padding: 6px;
  display: flex; flex-direction: column; gap: 4px;
}
.hub-item-card {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; border-radius: var(--radius-xs);
  border: 1px solid transparent;
  cursor: pointer; transition: all var(--dur) var(--ease);
}
.hub-item-card:hover { background: var(--bg-hover); }
.hub-item-card.active {
  background: var(--bg-surface);
  border-color: var(--ras);
}
.hub-item-icon { font-size: 16px; flex-shrink: 0; }
.hub-item-info { flex: 1; min-width: 0; }
.hub-item-title { font-size: 13px; font-weight: 600; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.hub-item-type { font-size: 10px; color: var(--text-muted); text-transform: uppercase; font-weight: 700; }

/* Main Viewer */
.hub-main-view {
  flex: 1; min-width: 0;
  display: flex; flex-direction: column;
  background: var(--bg);
  overflow: hidden;
}

.hub-reader-mode, .hub-editor-mode {
  display: flex; flex-direction: column; height: 100%; min-height: 0;
}

.hub-reader-header {
  padding: 16px 24px; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
  background: var(--bg-card);
}
.hub-type-badge {
  padding: 2px 8px; border-radius: 4px; font-size: 9.5px; font-weight: 800;
  background: var(--ras-glow); color: var(--ras); letter-spacing: 0.5px; text-transform: uppercase;
}
.reader-item-title { font-size: 18px; font-weight: 700; margin-top: 4px; color: var(--text); }
.hub-reader-controls { display: flex; gap: 8px; }
.hub-control-btn {
  display: flex; align-items: center; gap: 6px;
  padding: 6px 12px; border: 1px solid var(--border); border-radius: var(--radius-xs);
  background: transparent; color: var(--text-sec); font-size: 12px; font-weight: 500;
  cursor: pointer; transition: all var(--dur) var(--ease);
}
.hub-control-btn:hover { border-color: var(--ras); color: var(--ras); }
.hub-control-btn.danger:hover { border-color: var(--danger); color: var(--danger); }

/* Clean Slate Container */
.clean-slate-container {
  flex: 1; overflow-y: auto; padding: 24px 32px;
  background: var(--bg);
}
.clean-slate-body {
  max-width: 720px; margin: 0 auto;
  font-family: 'Inter', -apple-system, sans-serif;
  font-size: 15px; line-height: 1.7; color: var(--text);
}
.clean-slate-body h1 { font-size: 22px; font-weight: 800; margin: 16px 0 8px 0; color: var(--text); }
.clean-slate-body h2 { font-size: 18px; font-weight: 700; margin: 14px 0 6px 0; color: var(--text); }
.clean-slate-body h3 { font-size: 16px; font-weight: 600; margin: 12px 0 4px 0; color: var(--text); }
.clean-slate-body p { margin-bottom: 12px; }
.clean-slate-body ul, .clean-slate-body ol { margin: 8px 0 12px 24px; }
.clean-slate-body li { margin-bottom: 4px; }
.clean-slate-body pre {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-xs); padding: 14px;
  font-family: monospace; font-size: 13px; overflow-x: auto;
  margin: 12px 0; color: #a855f7;
}

/* Media Embeds */
.media-embed-video {
  position: relative; width: 100%; padding-bottom: 56.25%; height: 0;
  border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border);
  box-shadow: var(--shadow-md); margin-bottom: 16px; background: #000;
  transform: translateZ(0);
  will-change: transform;
}
.media-embed-video iframe {
  position: absolute; top: 0; left: 0; width: 100%; height: 100%; border: 0;
  transform: translateZ(0);
  background: #000;
}

.media-embed-image {
  text-align: center; margin-bottom: 16px;
}
.media-embed-image img {
  max-width: 100%; max-height: 480px; border-radius: var(--radius);
  border: 1px solid var(--border); box-shadow: var(--shadow-md); object-fit: contain;
}

.media-embed-card {
  display: flex; align-items: center; gap: 16px;
  padding: 20px 24px; background: var(--bg-card);
  border: 1px solid var(--border); border-radius: var(--radius);
  margin-bottom: 16px; transition: border-color var(--dur) var(--ease);
}
.media-embed-card:hover { border-color: var(--ras); }
.media-embed-card .card-icon { font-size: 32px; flex-shrink: 0; }
.media-embed-card .card-details { flex: 1; min-width: 0; }
.media-embed-card .card-title { font-size: 15px; font-weight: 700; color: var(--text); margin-bottom: 2px; }
.media-embed-card .card-url { font-size: 12px; color: var(--ras); word-break: break-all; }

/* Editor Form */
.hub-editor-mode { padding: 20px 28px; overflow-y: auto; }
.hub-editor-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.hub-editor-header h4 { font-size: 16px; font-weight: 700; }
.hub-form-group { margin-bottom: 16px; }
.hub-form-group label { display: block; font-size: 12px; font-weight: 700; color: var(--text-sec); margin-bottom: 6px; }
.hub-input {
  width: 100%; padding: 10px 14px; background: var(--bg-card);
  border: 1px solid var(--border); border-radius: var(--radius-xs);
  color: var(--text); font-size: 13.5px; font-family: inherit;
  outline: none; transition: border-color var(--dur) var(--ease);
}
.hub-input:focus { border-color: var(--ras); }

.hub-type-selector { display: flex; gap: 6px; flex-wrap: wrap; }
.type-btn {
  padding: 8px 14px; border: 1px solid var(--border); border-radius: var(--radius-xs);
  background: var(--bg-card); color: var(--text-sec); font-size: 12px; font-weight: 600;
  cursor: pointer; transition: all var(--dur) var(--ease);
}
.type-btn:hover { border-color: var(--text-muted); color: var(--text); }
.type-btn.active { border-color: var(--ras); background: var(--ras-glow); color: var(--ras); }

.res-url-hint { font-size: 11px; color: var(--text-muted); margin-top: 4px; display: block; }

/* Structured Time Inputs */
.time-inputs-grid {
  display: flex; gap: 10px; margin-top: 4px;
}
.time-box {
  display: flex; align-items: center; gap: 6px;
  flex: 1; background: var(--bg-card);
  border: 1px solid var(--border); border-radius: var(--radius-xs);
  padding: 0 10px;
}
.time-box:focus-within { border-color: var(--ras); }
.time-num-input {
  border: none !important; padding: 8px 0 !important;
  text-align: center; font-weight: 700; font-size: 14px;
  -moz-appearance: textfield;
}
.time-num-input::-webkit-outer-spin-button,
.time-num-input::-webkit-inner-spin-button {
  -webkit-appearance: none; margin: 0;
}
.time-unit {
  font-size: 11px; font-weight: 700; color: var(--text-muted); text-transform: uppercase;
}

.hub-item-thumb {
  width: 38px; height: 26px; border-radius: 4px; object-fit: cover;
  flex-shrink: 0; border: 1px solid var(--border);
}

.media-embed-pdf-object {
  width: 100%; height: 500px; border-radius: var(--radius);
  border: 1px solid var(--border); margin-bottom: 16px;
  background: var(--bg-card);
}

.url-file-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 6px;
}
.url-file-header label { margin-bottom: 0 !important; }

.btn-file-browse {
  padding: 4px 10px; border: 1px solid var(--border); border-radius: var(--radius-xs);
  background: var(--bg-surface); color: var(--text-sec); font-size: 11px; font-weight: 600;
  cursor: pointer; transition: all var(--dur) var(--ease);
}
.btn-file-browse:hover { border-color: var(--ras); color: var(--ras); }

.file-name-display {
  font-size: 11px; color: var(--gk); margin-top: 4px; font-weight: 600;
}

.note-header-labels {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 6px;
}
.note-header-labels label { margin-bottom: 0 !important; }
.md-hint { font-size: 10.5px; color: var(--text-muted); font-weight: 400; }

.bm-card-thumb {
  width: 100%; height: 120px; border-radius: var(--radius-xs);
  object-fit: cover; margin-bottom: 8px; border: 1px solid var(--border);
}

/* Custom Themed Confirmation Modal */
.confirm-modal {
  position: fixed; inset: 0;
  z-index: 1100;
  display: flex; align-items: center; justify-content: center;
}
.confirm-card {
  position: relative; z-index: 1101;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  width: 90%; max-width: 380px;
  text-align: center;
  box-shadow: var(--shadow-lg);
  animation: modalScaleUp .25s var(--ease);
}
@keyframes modalScaleUp {
  from { opacity: 0; transform: scale(.94) translateY(10px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}

.confirm-icon-wrap {
  width: 48px; height: 48px; margin: 0 auto 14px auto;
  border-radius: 50%; background: #ef444415;
  display: flex; align-items: center; justify-content: center;
}
.confirm-title { font-size: 17px; font-weight: 700; color: var(--text); margin-bottom: 6px; }
.confirm-message { font-size: 13px; color: var(--text-sec); margin-bottom: 20px; line-height: 1.5; }
.confirm-actions { display: flex; gap: 10px; justify-content: flex-end; }
.confirm-actions button { flex: 1; }

.btn-danger-sm {
  padding: 8px 14px; border: none; border-radius: var(--radius-xs);
  background: var(--danger); color: white; font-size: 12.5px; font-weight: 600;
  cursor: pointer; transition: all var(--dur) var(--ease);
}
.btn-danger-sm:hover { opacity: 0.9; transform: translateY(-1px); }

/* Mobile adjustments */
@media (max-width: 640px) {
  .hub-modal-content { width: 95%; height: 90vh; max-height: none; }
  .hub-modal-body { flex-direction: column; }
  .hub-sidebar { width: 100%; height: 130px; border-right: none; border-bottom: 1px solid var(--border); }
  .hub-items-list { flex-direction: row; overflow-x: auto; padding: 6px; }
  .hub-item-card { flex-direction: column; text-align: center; min-width: 100px; padding: 6px 8px; }
  .clean-slate-container { padding: 16px; }
  .hub-reader-header { padding: 12px 16px; }
  .media-embed-pdf-object { height: 350px; }
}