html,
body {
  width: 100%;
  overflow-x: hidden;
  box-sizing: border-box;
}

*,
*::before,
*::after {
  box-sizing: inherit;
}

:root {
  --bg-color: #f9f9f9;
  --text-color: rgb(51, 51, 51);
  --header-bg: #1be357;
  --card-bg: white;
  --border-color: #dddddd;
  --accent-color: #7123a5;
  --secondary-accent: #7123a5;
  --day-bg: #f0f8ff;
  --day-border: #4a7c59;
  --special-bg: #fffacd;
  --transition: 0.4s;
  --error-color: red;
  --modal-bg: #fefefe;
  --modal-overlay: rgba(0, 0, 0, 0.4);
  --custom-font-family: Arial, sans-serif;
  --custom-font-size: 16px;
}

.dark-mode {
  --bg-color: #121212;
  --text-color: #e0e0e0;
  --header-bg: #4a7c59;
  --card-bg: #1e1e1e;
  --border-color: rgb(51, 51, 51);
  --accent-color: #2dc75e;
  --accent-color: #5a1e8c;
  --day-bg: #4a7c59;
  --day-border: #2a3a2a;
  --special-bg: #4a4a00;
  --error-color: #ff6b6b;
  --modal-bg: #2a2a2a;
  --modal-overlay: rgba(0, 0, 0, 0.6);
}

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  transition:
    background-color var(--transition),
    color var(--transition);
  font-family: var(--custom-font-family);
  font-size: var(--custom-font-size);
  margin: 0;
  padding: 20px;
  line-height: 1.6;
}

header {
  background-color: var(--header-bg);
  color: var(--text-color);
  padding: 20px;
  text-align: center;
  transition: background-color var(--transition);
  margin-bottom: 20px;
  border-radius: 8px;
  position: relative;
}

.header-controls {
  position: static;
  display: flex;
  align-items: center;
  gap: 15px;
  z-index: 10;
}

.settings-toggle {
  position: absolute;
  top: -26px;
  right: 10px;
}

.settings-toggle img {
  width: 24px;
  height: 24px;
  position: relative;
  top: 40px;
  left: -10px;
}

.theme-toggle {
  position: absolute;
  top: -36px;
  right: 80px;
}

.theme-toggle img {
  position: relative;
  top: -11px;
  left: -10.5px;
}

.toggle-switch {
  position: absolute;
  bottom: 20px;
  right: -95%;
  z-index: 11;
}

.search-section {
  text-align: center;
  margin-bottom: 30px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

#searchInput {
  padding: 12px;
  width: 80%;
  max-width: 300px;
  border: 2px solid var(--accent-color);
  border-radius: 4px;
  font-size: 16px;
  background-color: var(--card-bg);
  color: var(--text-color);
  transition:
    border-color var(--transition),
    background-color var(--transition),
    color var(--transition);
  box-sizing: border-box;
}

button {
  padding: 12px 20px;
  background-color: var(--accent-color);
  color: rgb(250, 4, 4);
  border: none;
  border-radius: 4px;
  cursor: pointer;
  margin-left: 10px;
  transition: background-color var(--transition);
}

button:hover {
  background-color: var(--secondary-accent);
}

#content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 15px;
  max-width: 100%;
  margin: 0 auto;
}

.card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  padding: 20px;
  border-radius: 8px;
  transition:
    background-color var(--transition),
    border-color var(--transition);
}

.sub-card {
  margin-bottom: 15px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-color);
}

.sub-card:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.card h3 {
  color: var(--accent-color);
  margin-top: 0;
}

.card .teacher {
  font-weight: bold;
  color: var(--text-color);
}

.card .location {
  font-style: italic;
  color: #888;
}

.day {
  margin: 10px 0;
  padding: 8px;
  background: var(--day-bg);
  border-left: 4px solid var(--day-border);
  transition:
    background var(--transition),
    border-left-color var(--transition);
}

.hidden {
  display: none;
}

#noResults {
  text-align: center;
  color: var(--text-color);
  font-style: italic;
  margin: 20px;
}

footer {
  text-align: center;
  margin-top: 40px;
  padding: 15px;
  background-color: var(--secondary-accent);
  color: white;
  border-radius: 8px;
  transition: background-color var(--transition);
}

footer a {
  color: white;
  text-decoration: none;
}

.modal {
  display: block;
  position: fixed;
  z-index: 12;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: var(--modal-overlay);
  transition: background-color var(--transition);
}

.modal-content {
  background-color: var(--modal-bg);
  margin: 15% auto;
  padding: 20px;
  border: 1px solid var(--border-color);
  width: 80%;
  max-width: 400px;
  border-radius: 8px;
  text-align: center;
  color: var(--text-color);
  transition:
    background-color var(--transition),
    color var(--transition),
    border-color var(--transition);
}

.close {
  color: #aaa;
  float: right;
  font-size: 28px;
  font-weight: bold;
  cursor: pointer;
  transition: color var(--transition);
}

.close:hover {
  color: var(--text-color);
}

#loginForm input {
  width: 100%;
  padding: 10px;
  margin: 10px 0;
  border: 1px solid var(--accent-color);
  border-radius: 4px;
  background-color: var(--card-bg);
  color: var(--text-color);
  transition:
    border-color var(--transition),
    background-color var(--transition),
    color var(--transition);
}

#loginForm button {
  width: 100%;
  padding: 10px;
  margin-top: 10px;
  margin-right: 0.2%;
  margin-left: 0.2%;
  background-color: var(--accent-color);
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color var(--transition);
  position: relative;
}

.error {
  color: var(--error-color);
  margin-top: 10px;
}

.search-section button:last-child {
  background-color: var(--secondary-accent);
}

.search-section button:last-child:hover {
  background-color: darken(var(--secondary-accent), 10%);
}

.toggle-switch {
  position: relative;
  display: inline-block;
  width: 60px;
  height: 30px;
}

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

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ccc;
  transition: 0.4s;
  border-radius: 30px;
  overflow: hidden;
}

.slider-text-k {
  position: absolute;
  left: 15px;
  top: 50%;
  transform: translateY(-50%);
  font-weight: bold;
  color: #666;
  z-index: 1;
  transition: color 0.4s;
}

.slider-text-s {
  position: absolute;
  right: 15px;
  top: 50%;
  transform: translateY(-50%);
  font-weight: bold;
  color: purple;
  z-index: 1;
  transition: color 0.4s;
}

input:checked + .slider .slider-text-k {
  color: purple;
}

input:checked + .slider .slider-text-s {
  color: #666;
}

.slider:before {
  position: absolute;
  content: '';
  height: 26px;
  width: 26px;
  left: 2px;
  bottom: 2px;
  background-color: #4a7c59;
  transition: 0.4s;
  border-radius: 50%;
  border: 2px solid white;
  z-index: 2;
}

input:checked + .slider {
  background-color: #ccc;
}

input:checked + .slider:before {
  transform: translateX(30px);
}

.nav-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 20px;
  background-color: var(--card-bg);
  padding: 20px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

.radio-group {
  display: flex;
  justify-content: center;
  margin-bottom: 10px;
}

.radio-group label {
  margin: 0 10px;
  cursor: pointer;
  color: var(--text-color);
  display: flex;
  align-items: center;
}

.radio-group input[type='radio'] {
  margin-right: 5px;
}

.button-group {
  margin-top: 5px;
  display: flex;
  justify-content: center;
  gap: 25px;
}

#searchInput {
  border-right: 2px solid var(--border-color);
  padding-right: 0.5px;
}

#grade-select {
  padding: 12px;
  width: 300px;
  border: 2px solid var(--accent-color);
  border-radius: 4px;
  font-size: 16px;
  background-color: var(--card-bg);
  color: var(--text-color);
  transition: border-color var(--transition);
}

.table-scroll {
  overflow-x: auto;
}

.lesson-table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--card-bg);
  color: var(--text-color);
  min-width: 600px;
}

.lesson-table th,
.lesson-table td {
  border: 1px solid var(--border-color);
  padding: 8px;
  text-align: center;
  vertical-align: top;
}

.lesson-table th:nth-child(1),
.lesson-table td:nth-child(1) {
  width: 10%;
}

.lesson-table th:nth-child(2),
.lesson-table td:nth-child(2) {
  width: 15%;
}

.lesson-table th:nth-child(3),
.lesson-table td:nth-child(3) {
  width: 30%;
}

.lesson-table th:nth-child(4),
.lesson-table td:nth-child(4) {
  width: 20%;
}

.lesson-table th:nth-child(5),
.lesson-table td:nth-child(5) {
  width: 25%;
}

.lesson-table th {
  background-color: var(--header-bg);
  color: var(--text-color);
}

.lesson-table .highlight {
  background-color: var(--day-bg);
  color: var(--text-color);
  font-weight: bold;
}

.lesson-table .special-lesson {
  background-color: var(--special-bg);
  font-weight: bold;
}

.lesson-table.vertical-days {
  border-collapse: collapse;
  width: 100%;
  table-layout: fixed;
}

.lesson-table.vertical-days th,
.lesson-table.vertical-days td {
  border: 1px solid var(--border-color);
  padding: 15px;
  text-align: center;
  vertical-align: middle;
  height: 25px !important;
}

.day-sidebar {
  writing-mode: vertical-lr !important;
  text-orientation: sideways !important;
  font-weight: bold !important;
  width: 60px !important;
  background-color: #4a7c59 !important;
  color: white !important;
  border: 2px solid #5a1e8c !important;
}

.day-header {
  background-color: var(--header-bg);
  color: white;
  writing-mode: vertical-rl !important;
  text-orientation: upright !important;
  font-weight: bold;
  width: 15px !important;
}

@media (max-width: 768px) {
  .lesson-table.vertical-days .day-sidebar,
  .lesson-table.vertical-days .day-header {
    writing-mode: horizontal-tb !important;
    width: auto;
    height: 30px !important;
  }
}

.settings-toggle {
  background-color: var(--accent-color);
  border: none;
  padding: 10px;
  border-radius: 50%;
  cursor: pointer;
  width: 40px;
  height: 40px;
  color: white;
  font-size: 18px;
  transition: background-color var(--transition);
}

.settings-toggle img {
  position: relative;
  top: 2px;
}

.settings-toggle:hover {
  background-color: var(--secondary-accent);
}

.theme-toggle {
  background-color: var(--accent-color);
  border: none;
  padding: 10px;
  border-radius: 50%;
  cursor: pointer;
  width: 40px;
  height: 40px;
  margin-left: 10px;
  margin-top: 10px;
  color: white;
  font-size: 18px;
  transition: background-color var(--transition);
}

.theme-toggle:hover {
  background-color: var(--secondary-accent);
}

.setting-group {
  margin: 15px 0;
  text-align: left;
}

.setting-group label {
  display: block;
  margin-bottom: 5px;
  font-weight: bold;
  color: var(--text-color);
}

.setting-group input[type='color'] {
  width: 50px;
  height: 40px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

.setting-group select {
  width: 100%;
  padding: 8px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background-color: var(--card-bg);
  color: var(--text-color);
  font-size: 16px;
}

#settingsForm button {
  margin: 10px 5px;
  padding: 10px 15px;
  background-color: var(--accent-color);
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color var(--transition);
}

#settingsForm button:hover {
  background-color: var(--secondary-accent);
}

@media (max-width: 768px) {
  body {
    padding: 10px;
  }

  #searchInput {
    width: 100%;
    max-width: none;
    padding: 10px;
  }

  button {
    margin-top: 10px;
    margin-left: 0;
    display: block;
    width: 100%;
    padding: 10px;
  }

  .card {
    padding: 15px;
  }

  #content {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .modal-content {
    width: 95%;
    margin: 20% auto;
    padding: 15px;
  }

  header {
    padding: 15px 10px;
  }

  .settings-toggle {
    top: -36px;
    right: 1px;
    width: 35px;
    height: 35px;
    font-size: 16px;
  }

  .theme-toggle {
    top: -36px;
    right: 41px;
    width: 35px;
    height: 35px;
    font-size: 16px;
  }

  .toggle-switch {
    bottom: 15px;
    right: -87%;
  }

  .toggle-switch {
    width: 50px;
    height: 25px;
  }

  .slider-text-k,
  .slider-text-s {
    font-size: 12px;
  }

  .slider-text-k {
    left: 12px;
  }

  .slider-text-s {
    right: 12px;
  }

  .slider:before {
    height: 21px;
    width: 21px;
  }

  input:checked + .slider:before {
    transform: translateX(25px);
  }

  footer {
    padding: 15px 10px;
  }
}

@media (max-width: 480px) {
  body {
    padding: 5px;
  }

  header {
    padding: 10px;
    margin-bottom: 10px;
  }

  .search-section {
    display: none;
    margin-bottom: 20px;
  }

  #searchInput {
    font-size: 14px;
    padding: 8px;
  }

  button {
    padding: 8px;
    font-size: 14px;
  }

  .card {
    padding: 10px;
  }

  .sub-card {
    margin-bottom: 10px;
  }

  .day {
    padding: 6px;
    margin: 5px 0;
    font-size: 14px;
  }

  .modal-content {
    width: 98%;
    margin: 50px auto;
    padding: 10px;
  }

  footer {
    padding: 10px;
    margin-top: 20px;
  }
}

/* Lesson Player Styles */
.lesson-container {
  display: flex;
  flex-direction: column;
  height: 90vh;
  max-width: 1200px;
  margin: 0 auto;
}

.lesson-header {
  text-align: center;
  padding: 1rem;
  background: var(--card-bg, #f0f0f0);
}

.progress-info {
  font-size: 1.2rem;
  margin: 0.5rem 0;
}

.progress-bar {
  height: 10px;
  background: #ddd;
  border-radius: 5px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: #4caf50;
  transition: width 0.4s ease;
}

.lesson-iframe {
  flex: 1;
  border: none;
  width: 100%;
}

.lesson-nav {
  display: flex;
  justify-content: center;
  gap: 1rem;
  padding: 1rem;
}

.lesson-nav button {
  padding: 0.8rem 1.5rem;
  font-size: 1.1rem;
  border: none;
  border-radius: 8px;
  cursor: pointer;
}

.lesson-nav button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

#reset-btn {
  background: #ff9800;
  color: white;
}

.info {
  text-align: center;
  color: var(--text-color);
  font-style: italic;
  margin: 20px;
  font-size: 18px;
}

/* Progress tracking stats */
.stats {
  background: #e3f2fd;
  border: 2px solid #4a90e2;
  border-radius: 10px;
  padding: 15px;
  margin: 20px auto;
  max-width: 600px;
  text-align: center;
  font-size: 1.2rem;
}
.stats button {
  background: #ff9800;
  margin-top: 10px;
}

/* Immersive full-screen task mode */
body.task-mode {
  background: #f8fff8 !important;
  overflow: hidden;
}

body.task-mode #public-grade-select,
body.task-mode #public-subject-select,
body.task-mode #public-task-radios,
body.task-mode .header,
body.task-mode .nav-top {
  display: none !important;
}

.immersive-lesson {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: #f8fff8;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.immersive-lesson iframe {
  flex: 1;
  border: none;
  background: white;
}

.immersive-bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: white;
  padding: 15px 20px;
  box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.1);
  display: flex;
  justify-content: space-around;
  z-index: 10000;
  border-top: 1px solid #eee;
}

.immersive-bottom-nav button {
  padding: 12px 20px;
  font-size: 1.1rem;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  background: #1be357;
  color: white;
  transition: background-color 0.3s;
}

.immersive-bottom-nav button:hover:not(:disabled) {
  background: #0ea345;
}

.immersive-bottom-nav button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

#exit-btn {
  background: #666 !important;
}

#exit-btn:hover {
  background: #555 !important;
}

/* Flip Book Notes Styles */
.flipbook-toggle {
  position: fixed;
  top: 25px;
  left: 20px;
  background-color: var(--accent-color);
  color: white;
  border: none;
  border-radius: 50%;
  width: 60px;
  height: 60px;
  font-size: 24px;
  cursor: pointer;
  z-index: 1000;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
  transition: all 0.3s ease;
}

.flipbook-toggle:hover {
  background-color: var(--secondary-accent);
  transform: scale(1.1);
}

.flipbook-notes {
  position: fixed;
  top: 100px;
  left: 20px;
  width: 350px;
  max-height: 70vh;
  background-color: var(--card-bg);
  border: 2px solid var(--border-color);
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  z-index: 999;
  overflow-y: auto;
  display: none;
}

.flipbook-notes h3 {
  margin-top: 0;
  color: var(--accent-color);
  text-align: center;
  border-bottom: 2px solid var(--accent-color);
  padding-bottom: 10px;
}

.add-note {
  width: 100%;
  padding: 10px;
  background-color: var(--accent-color);
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  margin-bottom: 15px;
  font-size: 16px;
  transition: background-color 0.3s ease;
}

.add-note:hover {
  background-color: var(--secondary-accent);
}

.notes-container {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.note-card {
  perspective: 1000px;
}

.note-flipper {
  position: relative;
  width: 100%;
  height: 120px;
  transition: transform 0.6s;
  transform-style: preserve-3d;
  cursor: pointer;
}

.note-flipper.flipped {
  transform: rotateY(180deg);
}

.note-front,
.note-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border-radius: 8px;
  padding: 12px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  overflow: hidden;
}

.note-front {
  background-color: var(--day-bg);
  border: 2px solid var(--day-border);
  display: flex;
  align-items: center;
  justify-content: center;
}

.note-preview {
  text-align: center;
  font-style: italic;
  color: var(--text-color);
  font-size: 14px;
  line-height: 1.4;
}

.note-back {
  background-color: var(--card-bg);
  border: 2px solid var(--border-color);
  transform: rotateY(180deg);
  display: flex;
  flex-direction: column;
}

.note-textarea {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  color: var(--text-color);
  font-family: inherit;
  font-size: 14px;
  resize: none;
  padding: 0;
  line-height: 1.4;
}

.note-textarea::placeholder {
  color: #888;
}

.delete-note {
  position: absolute;
  top: 8px;
  right: 8px;
  background: #ff4444;
  color: white;
  border: none;
  border-radius: 4px;
  width: 30px;
  height: 30px;
  cursor: pointer;
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.3s ease;
}

.delete-note:hover {
  background: #cc0000;
}

/* Responsive adjustments for flip-book notes */
@media (max-width: 768px) {
  .flipbook-toggle {
    width: 50px;
    height: 50px;
    font-size: 20px;
    top: auto;
    right: auto;
    bottom: 20px;
    left: 20px;
  }

  .flipbook-notes {
    width: 280px;
    top: auto;
    right: auto;
    bottom: 90px;
    left: 20px;
    max-height: 60vh;
    padding: 15px;
  }

  .note-flipper {
    height: 100px;
  }

  .note-front,
  .note-back {
    padding: 10px;
  }

  .note-preview {
    font-size: 12px;
  }

  .note-textarea {
    font-size: 12px;
  }
}

@media (max-width: 480px) {
  .flipbook-notes {
    width: 250px;
    bottom: 80px;
    left: 15px;
    max-height: 50vh;
  }

  .note-flipper {
    height: 80px;
  }
}