:root {
  color-scheme: dark;
  --bg: #06111e;
  --panel: #11233a;
  --panel-strong: #17304d;
  --text: #f4f8ff;
  --muted: #adc1d7;
  --accent: #48c1ff;
  --accent-2: #8b5cf6;
  --success: #2ed5a7;
  --danger: #f87171;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: radial-gradient(circle at top, rgba(72, 193, 255, 0.2), transparent 40%), linear-gradient(135deg, var(--bg), #091627);
  color: var(--text);
}

.topbar-app {
  width: calc(100% - 2.8rem);
  margin: 1rem auto 0;
  padding: 1rem 1.4rem;
  border-radius: 999px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(14px);
}

.topbar-title {
  font-weight: 700;
}

.topbar-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.5rem;
}

.ghost-btn,
.topbar-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  padding: 0.72rem 0.95rem;
  font-weight: 700;
  font: inherit;
  cursor: pointer;
}

.app-shell {
  width: 100%;
  padding: 1.5rem 1.4rem 3rem;
}

.cloud-sharing-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 1.25fr) auto;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
  padding: 1rem 1.2rem;
  border: 1px solid rgba(72, 193, 255, 0.2);
  border-radius: 1rem;
  background: rgba(17, 35, 58, 0.78);
}

.cloud-status {
  color: var(--muted);
  line-height: 1.5;
}

.cloud-status.error {
  color: var(--danger);
}

.cloud-login-form {
  display: grid;
  grid-template-columns: auto minmax(130px, 1fr) auto minmax(130px, 1fr) auto;
  align-items: center;
  gap: 0.5rem;
}

.cloud-login-form label {
  font-size: 0.82rem;
}

.cloud-login-form input {
  min-width: 0;
  padding: 0.65rem 0.75rem;
}

.cloud-login-form button,
.cloud-owner-actions button {
  white-space: nowrap;
}

.cloud-owner-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.5rem;
}

.cloud-sharing-panel [hidden] {
  display: none !important;
}

.tab-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.tab-btn {
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  border-radius: 999px;
  padding: 0.7rem 1rem;
  cursor: pointer;
  font-weight: 700;
}

.tab-btn.active {
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  color: #06111e;
}

.tab-panel.active {
  display: block;
}

.top-card,
.panel {
  background: linear-gradient(135deg, rgba(17, 35, 58, 0.95), rgba(23, 48, 77, 0.9));
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 1.2rem;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.25);
}

.top-card {
  padding: clamp(1.4rem, 2.5vw, 2.25rem);
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 700;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  margin-top: 0.35rem;
  font-size: clamp(2rem, 4vw, 3rem);
}

.subtitle {
  margin-top: 0.6rem;
  color: var(--muted);
  max-width: 55ch;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.stat-card {
  background: rgba(255, 255, 255, 0.04);
  border-radius: 1rem;
  padding: 1rem;
}

.stat-card span {
  display: block;
  font-size: 1.6rem;
  font-weight: 700;
}

.stat-card small {
  color: var(--muted);
}

.panel-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
  margin: 1rem 0;
}

.panel {
  padding: clamp(1.25rem, 2vw, 1.85rem);
}

.form-row {
  display: grid;
  gap: 0.35rem;
  margin-bottom: 0.9rem;
}

.form-row-inline {
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

label {
  font-weight: 600;
}

input,
select {
  width: 100%;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 0.9rem;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  padding: 0.85rem 0.95rem;
  font-size: 0.95rem;
}

.button-row,
.preset-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.primary-btn,
.secondary-btn,
.preset-btn,
.task-btn {
  border: none;
  border-radius: 999px;
  padding: 0.78rem 1rem;
  cursor: pointer;
  font-weight: 700;
  transition: transform 0.18s ease, opacity 0.18s ease;
}

.primary-btn {
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  color: #04111c;
}

.secondary-btn,
.preset-btn {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
}

.primary-btn:hover,
.secondary-btn:hover,
.preset-btn:hover,
.task-btn:hover {
  transform: translateY(-1px);
}

.progress-track {
  width: 100%;
  height: 14px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 999px;
  overflow: hidden;
  margin: 1rem 0 0.75rem;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(120deg, var(--success), var(--accent));
  border-radius: inherit;
}

.progress-text {
  color: var(--muted);
}

.section-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: end;
  gap: 0.75rem;
  margin-bottom: 0.85rem;
}

.section-header p {
  color: var(--muted);
}

.task-list {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
  display: grid;
  gap: 0.75rem;
}

.task-item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.75rem;
  align-items: center;
  padding: 0.85rem 0.95rem;
  border-radius: 0.95rem;
  background: rgba(255, 255, 255, 0.04);
}

.task-item.completed .task-text {
  text-decoration: line-through;
  color: var(--muted);
}

.task-checkbox {
  width: 20px;
  height: 20px;
  accent-color: var(--success);
}

.task-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  align-items: center;
  margin-top: 0.2rem;
  color: var(--muted);
  font-size: 0.84rem;
}

.task-btn {
  background: rgba(248, 113, 113, 0.15);
  color: #ffd4d4;
}

.task-category,
.task-period,
.task-schedule {
  padding: 0.25rem 0.5rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 700;
}

.task-category {
  background: rgba(72, 193, 255, 0.12);
  color: var(--accent);
}

.task-period {
  background: rgba(46, 213, 167, 0.14);
  color: #8df0d3;
}

.task-schedule {
  background: rgba(139, 92, 246, 0.14);
  color: #cdb6ff;
}

.study-notes-panel {
  margin-top: 1rem;
}

.study-note-form {
  display: grid;
  gap: 0.85rem;
}

textarea {
  width: 100%;
  min-height: 110px;
  border-radius: 0.9rem;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  padding: 0.85rem 0.95rem;
  resize: vertical;
}

.study-editor {
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 0.9rem;
  background: rgba(255, 255, 255, 0.04);
}

.study-editor-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  padding: 0.55rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.035);
}

.study-editor-btn {
  min-height: 2.2rem;
  padding: 0.4rem 0.65rem;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 0.55rem;
  background: rgba(255, 255, 255, 0.07);
  color: var(--text);
  cursor: pointer;
  font: inherit;
  font-size: 0.82rem;
}

.study-editor-btn:hover,
.study-editor-btn:focus-visible {
  border-color: var(--accent);
  background: rgba(72, 193, 255, 0.12);
}

.study-color-control,
.study-drawing-controls label {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  min-height: 2.2rem;
  padding: 0.25rem 0.5rem;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 0.55rem;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  font-size: 0.78rem;
}

.study-color-control input[type="color"],
.study-drawing-controls input[type="color"] {
  width: 2rem;
  height: 1.7rem;
  padding: 0.1rem;
  border: 0;
  border-radius: 0.3rem;
  background: transparent;
  cursor: pointer;
}

.study-drawing-panel {
  padding: 0.65rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.study-drawing-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  margin-bottom: 0.55rem;
}

.study-drawing-controls input[type="range"] {
  width: 7rem;
  padding: 0;
}

#studyDrawingCanvas {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 0.6rem;
  background: #fff;
  cursor: crosshair;
  touch-action: none;
}

.study-content-editor {
  min-height: 240px;
  padding: 1.1rem 1.25rem;
  outline: none;
  line-height: 1.75;
  overflow-wrap: anywhere;
}

.study-content-editor:empty::before {
  content: attr(data-placeholder);
  color: var(--muted);
  pointer-events: none;
}

.study-content-editor img,
.study-note-content img {
  display: block;
  max-width: 100%;
  max-height: 520px;
  margin: 0.65rem 0;
  border-radius: 0.65rem;
  object-fit: contain;
}

.study-content-editor blockquote,
.study-note-content blockquote {
  margin: 0.65rem 0;
  padding-left: 0.8rem;
  border-left: 3px solid var(--accent);
  color: var(--muted);
}

.study-content-editor [style*="background-color"],
.study-note-content [style*="background-color"] {
  border-radius: 0.15rem;
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
}

.study-content-editor ul,
.study-content-editor ol,
.study-note-content ul,
.study-note-content ol {
  padding-left: 1.5rem;
}

.study-content-editor table,
.study-note-content table {
  width: 100%;
  margin: 0.75rem 0;
  border-collapse: collapse;
}

.study-content-editor th,
.study-content-editor td,
.study-note-content th,
.study-note-content td {
  padding: 0.45rem 0.6rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
  text-align: left;
  vertical-align: top;
}

.study-content-editor th,
.study-note-content th {
  background: rgba(255, 255, 255, 0.08);
}

.study-content-editor pre,
.study-note-content pre {
  padding: 0.75rem;
  overflow-x: auto;
  border-radius: 0.6rem;
  background: rgba(0, 0, 0, 0.25);
  white-space: pre-wrap;
}

.study-content-editor hr,
.study-note-content hr {
  border: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.study-editor-status {
  min-height: 1.2em;
  color: var(--muted);
  font-size: 0.82rem;
}

.study-editor-status.error {
  color: var(--danger);
}

.study-form-actions,
.study-note-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.study-notes-list {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
  display: grid;
  gap: 0.75rem;
}

.study-catalog,
.study-legacy-notes {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.study-catalog h3,
.study-legacy-notes h3 {
  margin: 0 0 0.75rem;
  font-size: 1.15rem;
}

.study-legacy-notes p {
  color: var(--muted);
  font-size: 0.9rem;
}

.study-area-navigation,
.study-matter-navigation,
.study-topic-navigation {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.9rem;
}

.study-folder-btn {
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 999px;
  padding: 0.75rem 1rem;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  font: inherit;
  font-size: 0.92rem;
  text-align: left;
  cursor: pointer;
}

.study-folder-btn.active {
  border-color: var(--accent);
  background: rgba(72, 193, 255, 0.16);
  color: #d9f3ff;
}

.study-folder-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.study-topic-navigation {
  padding: 1rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 0.9rem;
  background: rgba(0, 0, 0, 0.12);
}

.study-folder-heading {
  margin: 1rem 0 0.5rem;
  color: var(--accent);
  font-size: 0.95rem;
}

.study-note-item {
  background: rgba(255, 255, 255, 0.04);
  border-radius: 1.1rem;
  padding: 1.25rem;
}

.study-note-subject {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--text);
  font-weight: 700;
  font-size: 1.08rem;
  text-align: left;
  cursor: pointer;
}

.study-note-subject::after {
  content: "+";
  margin-left: 0.75rem;
  color: var(--accent);
  font-size: 1.25rem;
  line-height: 1;
}

.study-note-subject[aria-expanded="true"]::after {
  content: "−";
}

.study-note-subject:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
  border-radius: 0.2rem;
}

.study-note-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0.45rem 0 0.6rem;
  color: var(--muted);
  font-size: 0.84rem;
}

.study-note-content {
  color: var(--text);
  margin: 0;
  padding: 0.35rem 0.25rem 0.75rem;
  line-height: 1.8;
  overflow-wrap: anywhere;
}

.study-note-content[hidden],
.study-note-actions[hidden] {
  display: none;
}

.study-note-content > :first-child {
  margin-top: 0;
}

.study-note-content > :last-child {
  margin-bottom: 0;
}

.study-note-empty {
  color: var(--muted);
}

.exercise-panel {
  margin-top: 1rem;
}

.set-detail-list {
  display: grid;
  gap: 0.75rem;
}

.set-detail-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.65rem;
  padding: 0.75rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 0.9rem;
  background: rgba(255, 255, 255, 0.035);
}

.set-detail-row label {
  display: grid;
  gap: 0.35rem;
  color: var(--muted);
  font-size: 0.82rem;
}

.set-detail-heading {
  grid-column: 1 / -1;
}

.set-detail-row input:disabled {
  opacity: 0.55;
}

.exercise-set-progress {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
}

.set-detail-list .set-detail-row {
  align-items: end;
}

@media (max-width: 640px) {
  .topbar-app {
    width: auto;
    margin: 0.65rem 0.65rem 0;
    padding: 0.75rem;
    border-radius: 1rem;
  }

  .app-shell {
    padding: 1rem 0.75rem 2rem;
  }

  .cloud-sharing-panel,
  .cloud-login-form {
    grid-template-columns: 1fr;
  }

  .cloud-login-form label {
    margin-top: 0.25rem;
  }

  .cloud-owner-actions {
    justify-content: flex-start;
  }

  .cloud-login-form button,
  .cloud-owner-actions button {
    white-space: normal;
  }

  .study-content-editor {
    min-height: 190px;
    padding: 0.9rem;
  }

  .study-note-item {
    padding: 1rem;
  }

  .set-detail-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.training-goal-hint {
  margin: -0.45rem 0 0.9rem;
  color: var(--muted);
  font-size: 0.85rem;
}

.exercise-form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.category-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.category-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 0.7rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text);
  font-size: 0.82rem;
  font-weight: 600;
}

.category-pill input {
  accent-color: var(--accent-2);
  width: 16px;
  height: 16px;
}

.timer-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.exercise-list {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
  display: grid;
  gap: 0.75rem;
}

.exercise-category-browser {
  display: grid;
  gap: 0.65rem;
  margin-top: 1.25rem;
}

.exercise-category-heading {
  margin: 0;
  font-size: 1rem;
}

.exercise-category-navigation {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.exercise-category-button {
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  padding: 0.45rem 0.75rem;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  cursor: pointer;
  font: inherit;
  font-size: 0.82rem;
}

.exercise-category-button.active {
  border-color: var(--accent);
  background: rgba(72, 193, 255, 0.14);
  color: var(--accent);
}

.exercise-item {
  display: grid;
  gap: 0.65rem;
  padding: 0.9rem;
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.04);
}

.exercise-item-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  align-items: center;
}

.exercise-name {
  font-weight: 700;
}

.exercise-note {
  padding: 0.6rem 0.75rem;
  border-left: 3px solid var(--accent);
  border-radius: 0.35rem;
  background: rgba(72, 193, 255, 0.08);
  color: var(--text);
  line-height: 1.5;
  white-space: pre-wrap;
}

.exercise-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  color: var(--muted);
  font-size: 0.85rem;
}

.exercise-meta span {
  background: rgba(255, 255, 255, 0.05);
  padding: 0.3rem 0.5rem;
  border-radius: 999px;
}

.exercise-status {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--muted);
}

.exercise-workout-timer {
  display: grid;
  gap: 0.75rem;
  background: rgba(72, 193, 255, 0.08);
  border-radius: 0.9rem;
  padding: 0.8rem;
}

.exercise-workout-timer strong {
  color: var(--accent);
  font-size: 1.5rem;
}

.exercise-timer-phase {
  color: var(--muted);
  font-weight: 700;
}

.exercise-current-set {
  line-height: 1.5;
}

.exercise-workout-timer .secondary-btn:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

.exercise-empty {
  color: var(--muted);
}

@media (max-width: 640px) {
  .topbar-app {
    display: grid;
    grid-template-columns: 1fr 1fr;
    border-radius: 1rem;
  }

  .topbar-title {
    grid-column: 1 / -1;
    grid-row: 1;
  }

  .topbar-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .topbar-app .ghost-btn,
  .topbar-actions .topbar-btn {
    width: 100%;
    padding: 0.65rem 0.5rem;
    text-align: center;
    font-size: 0.82rem;
  }

  .task-item {
    grid-template-columns: auto 1fr;
  }

  .task-btn {
    grid-column: 2;
    justify-self: start;
  }
}