:root {
  --bg: #070a14;
  --bg-2: #0b1020;
  --panel: rgba(12, 18, 36, 0.84);
  --card-border: rgba(120, 170, 255, 0.16);
  --text: #eef5ff;
  --muted: #9cb0d7;
  --accent: #2fe1ff;
  --accent-2: #bb6cff;
  --accent-3: #70ffda;
  --danger: #ff6888;
  --shadow: 0 18px 40px rgba(0, 0, 0, 0.36);
  --radius: 22px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 0% 0%, rgba(47,225,255,0.18), transparent 25%),
    radial-gradient(circle at 100% 10%, rgba(187,108,255,0.18), transparent 30%),
    radial-gradient(circle at 50% 100%, rgba(112,255,218,0.08), transparent 30%),
    linear-gradient(180deg, #04060d 0%, #091021 100%);
}
button, input, textarea, select { font: inherit; }
input, textarea, select {
  width: 100%;
  border-radius: 14px;
  border: 1px solid rgba(135, 170, 255, 0.16);
  background: rgba(3, 8, 20, 0.8);
  color: var(--text);
  padding: 12px 14px;
  outline: none;
}
input:focus, textarea:focus, select:focus {
  border-color: rgba(47,225,255,0.42);
  box-shadow: 0 0 0 3px rgba(47,225,255,0.1);
}
textarea { resize: vertical; line-height: 1.55; }
.code-textarea, .task-code-block, code, pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}
.field-helper, .panel-subcopy, label span, .preview-label {
  display: block;
  color: var(--muted);
  font-size: 0.92rem;
}
.field-helper { margin-top: 7px; line-height: 1.45; }

.app-shell {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  min-height: 100vh;
  transition: grid-template-columns 160ms ease;
}

.app-shell.sidebar-collapsed {
  grid-template-columns: 92px minmax(0, 1fr);
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 18px;
  padding: 22px 16px 18px;
  border-right: 1px solid rgba(120,170,255,0.14);
  background:
    linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.015)),
    radial-gradient(circle at 0% 0%, rgba(47,225,255,0.12), transparent 30%),
    radial-gradient(circle at 100% 0%, rgba(187,108,255,0.12), transparent 34%),
    rgba(6, 10, 22, 0.92);
  backdrop-filter: blur(12px);
}
.sidebar.collapsed { width: 92px; }
.sidebar-top, .sidebar-bottom { display: flex; flex-direction: column; gap: 18px; }
.sidebar-brand { padding: 8px 8px 10px; }
.sidebar-wordmark {
  font-size: 1.9rem;
  font-weight: 900;
  letter-spacing: 0.05em;
  line-height: 0.96;
  text-transform: uppercase;
  color: #f9fcff;
  text-shadow: 0 0 12px rgba(47,225,255,0.18), 0 0 22px rgba(187,108,255,0.12);
}
.sidebar-submark, .brand-submark {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 8px;
}
.brand-wordmark {
  font-size: clamp(2.4rem, 5vw, 4.4rem);
  font-weight: 900;
  letter-spacing: 0.04em;
  line-height: 0.95;
  text-transform: uppercase;
  color: #f9fcff;
  text-shadow: 0 0 14px rgba(47,225,255,0.18), 0 0 28px rgba(187,108,255,0.12);
}
.brand-line {
  display: block;
  height: 2px;
  width: 84px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 12px rgba(47,225,255,0.18);
}
.brand-subtext {
  font-size: 0.98rem;
  letter-spacing: 0.45em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.9);
  padding-left: 0.45em;
}
.sidebar-label {
  margin: 0;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.74rem;
}

.sidebar-nav, .section-nav, .utility-actions.vertical {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.sidebar-nav-btn, .section-nav-btn {
  appearance: none;
  border: 1px solid rgba(135,170,255,0.12);
  background: rgba(255,255,255,0.03);
  color: var(--text);
  padding: 12px 14px;
  border-radius: 14px;
  text-align: left;
  cursor: pointer;
  transition: 160ms ease;
}
.section-nav-btn {
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 10px;
}
.section-nav-number {
  display: inline-flex;
  min-width: 34px;
  height: 34px;
  align-items: center;
  justify-content: center;
  padding: 0 10px;
  border-radius: 999px;
  font-size: 0.88rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--accent);
  background: linear-gradient(180deg, rgba(47,225,255,0.12), rgba(187,108,255,0.08));
  border: 1px solid rgba(47,225,255,0.18);
  box-shadow: 0 0 0 1px rgba(47,225,255,0.08);
}
.section-nav-text {
  min-width: 0;
  flex: 1;
}
.sidebar-nav-btn:hover, .section-nav-btn:hover,
.sidebar-nav-btn.active, .section-nav-btn.active {
  color: var(--text);
  border-color: rgba(47,225,255,0.28);
  background: linear-gradient(180deg, rgba(47,225,255,0.12), rgba(187,108,255,0.08));
  box-shadow: 0 0 0 1px rgba(47,225,255,0.12), 0 0 16px rgba(47,225,255,0.08);
}
.section-nav {
  max-height: calc(100vh - 370px);
  overflow: auto;
  padding-right: 4px;
}
.sidebar-collapse-btn { width: 100%; }

.sidebar.collapsed .sidebar-wordmark,
.sidebar.collapsed .brand-subtext,
.sidebar.collapsed .sidebar-label,
.sidebar.collapsed .section-nav-text,
.sidebar.collapsed .sidebar-nav-btn span,
.sidebar.collapsed .persistence-card .small-copy,
.sidebar.collapsed .persistence-card .card-label {
  display: none;
}
.sidebar.collapsed .sidebar-submark { justify-content: center; }
.sidebar.collapsed .brand-line { width: 24px; }
.sidebar.collapsed .section-nav, .sidebar.collapsed .sidebar-nav { align-items: stretch; }
.sidebar.collapsed .sidebar-nav-btn, .sidebar.collapsed .section-nav-btn,
.sidebar.collapsed .sidebar-collapse-btn, .sidebar.collapsed .primary-btn,
.sidebar.collapsed .danger-btn, .sidebar.collapsed .import-label .inline-btn {
  text-align: center;
  font-size: 0.82rem;
  padding-left: 10px;
  padding-right: 10px;
}
.sidebar.collapsed .sidebar-bottom {
  display: none;
}

.persistence-card, .summary-card, .hero, .filters-panel, .phase-card, .notes-panel, .builder-panel, .log-panel {
  background: linear-gradient(180deg, rgba(255,255,255,0.032), rgba(255,255,255,0.012));
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow);
  border-radius: var(--radius);
}
.persistence-card { padding: 16px; }

.main-shell { min-width: 0; padding: 24px 24px 36px; }
.hero {
  padding: 26px 28px;
  display: flex;
  justify-content: space-between;
  gap: 22px;
  align-items: flex-start;
  margin-bottom: 18px;
}
.eyebrow {
  margin: 0 0 8px;
  color: var(--accent-3);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.76rem;
}
h1, h2, h3, h4, h5, p { margin-top: 0; }
h1 { font-size: clamp(2rem, 4vw, 3rem); line-height: 1.04; margin-bottom: 0; }
.subtitle {
  margin: 14px 0 0;
  max-width: 760px;
  color: var(--muted);
  line-height: 1.62;
}

.hero-actions, .inline-actions, .phase-toolbar, .notes-header-actions, .utility-actions, .file-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.notes-page-grid { display: grid; gap: 16px; }

.summary-top-row, .filters-panel { margin-bottom: 18px; }
.summary-card { padding: 18px; }
.card-label {
  margin: 0 0 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  font-size: 0.76rem;
}
.small-copy, .phase-description, .task-detail, .markdown-rendered, .markdown-preview, .preview-empty {
  color: var(--muted);
  line-height: 1.7;
}

.progress-line {
  width: 100%;
  height: 12px;
  border-radius: 999px;
  background: rgba(255,255,255,0.08);
  overflow: hidden;
}
.progress-line.large { height: 14px; }
.progress-fill {
  height: 100%;
  width: 0;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--accent), var(--accent-2), var(--accent-3));
  box-shadow: 0 0 16px rgba(47,225,255,0.18);
  transition: width 180ms ease;
}
.summary-values {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  margin-top: 12px;
  font-size: 1rem;
}
.summary-values span:first-child {
  font-size: 1.35rem;
  font-weight: 800;
}

button, .import-label .inline-btn {
  cursor: pointer;
  border: 1px solid transparent;
  color: var(--text);
  background: rgba(255,255,255,0.05);
  border-radius: 14px;
  padding: 12px 15px;
  transition: 160ms ease;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
button:hover, .import-label .inline-btn:hover {
  transform: translateY(-1px);
  border-color: rgba(255,255,255,0.14);
}
.ghost-btn { background: rgba(255,255,255,0.04); border-color: rgba(255,255,255,0.1); }
.primary-btn { background: linear-gradient(180deg, rgba(47,225,255,0.22), rgba(112,255,218,0.14)); border-color: rgba(47,225,255,0.24); }
.danger-btn { background: linear-gradient(180deg, rgba(255,104,136,0.16), rgba(255,255,255,0.04)); border-color: rgba(255,104,136,0.18); }
.inline-btn { padding: 10px 13px; font-size: 0.96rem; }

.filters-panel {
  padding: 18px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-end;
}
.filters-left { flex: 1; min-width: 0; }
.filters-right { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.toggle-row { color: var(--muted); display: inline-flex; align-items: center; gap: 8px; }

.sections-container { display: grid; gap: 16px; }
.phase-card { overflow: hidden; }
.phase-header {
  width: 100%;
  border: 0;
  background: transparent;
  color: inherit;
  padding: 22px 22px 20px;
  display: flex;
  gap: 20px;
  justify-content: space-between;
  align-items: flex-start;
  cursor: pointer;
  text-align: left;
}
.phase-title-wrap { flex: 1; min-width: 0; }
.phase-tag {
  display: inline-flex;
  align-items: center;
  padding: 9px 14px;
  border-radius: 999px;
  background: linear-gradient(180deg, rgba(47,225,255,0.14), rgba(187,108,255,0.08));
  border: 1px solid rgba(47,225,255,0.18);
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.11em;
  font-size: 0.8rem;
  margin-bottom: 14px;
}
.phase-title { font-size: clamp(1.6rem, 3vw, 2.3rem); margin-bottom: 10px; }
.phase-metrics { min-width: 330px; display: flex; gap: 14px; align-items: center; }
.phase-progress-group { flex: 1; min-width: 0; }
.phase-stats { margin-top: 8px; text-align: right; color: var(--muted); white-space: nowrap; }
.chevron {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  color: var(--accent);
  transition: transform 160ms ease;
}
.phase-header[aria-expanded="true"] .chevron { transform: rotate(180deg); }
.phase-body { padding: 0 22px 22px; }
.phase-toolbar { margin-bottom: 14px; }

.card-form, .section-knowledge-panel, .task-row {
  border: 1px solid rgba(255,255,255,0.08);
  background: linear-gradient(180deg, rgba(255,255,255,0.025), rgba(255,255,255,0.01));
  border-radius: 18px;
}
.card-form { padding: 18px; margin-bottom: 16px; }
.form-grid { display: grid; gap: 14px; }
.task-grid, .section-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.full-span { grid-column: 1 / -1; }

.phase-checklist { display: grid; gap: 14px; }
.task-row { padding: 16px; }
.task-row.status-done {
  border-color: rgba(112,255,218,0.24);
  background: linear-gradient(180deg, rgba(112,255,218,0.07), rgba(255,255,255,0.012));
}
.task-row.status-inprogress {
  border-color: rgba(47,225,255,0.22);
  background: linear-gradient(180deg, rgba(47,225,255,0.07), rgba(255,255,255,0.012));
}
.task-row.status-blocked {
  border-color: rgba(255,104,136,0.22);
  background: linear-gradient(180deg, rgba(255,104,136,0.07), rgba(255,255,255,0.012));
}

.task-top-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 16px;
  align-items: flex-start;
}
.task-left {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: flex-start;
  min-width: 0;
  width: 100%;
}
.task-checkbox {
  margin-top: 6px;
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
}
.task-content {
  min-width: 0;
  width: 100%;
  cursor: pointer;
}
.task-content:focus-visible {
  outline: 2px solid rgba(47,225,255,0.4);
  outline-offset: 6px;
  border-radius: 10px;
}
.task-title {
  display: block;
  font-weight: 800;
  font-size: 1.08rem;
  margin-bottom: 6px;
  color: var(--text);
}
.task-right-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: flex-end;
  align-items: flex-start;
  min-width: 0;
  flex: 0 0 auto;
}
.task-status-select {
  width: auto;
  min-width: 124px;
  padding: 10px 12px;
}
.task-state {
  flex-shrink: 0;
  border-radius: 999px;
  padding: 10px 16px;
  font-weight: 800;
  letter-spacing: 0.06em;
  font-size: 0.84rem;
  text-transform: uppercase;
  border: 1px solid transparent;
}
.task-row.status-todo .task-state {
  color: #dce8ff;
  background: rgba(180, 198, 255, 0.1);
  border-color: rgba(180, 198, 255, 0.22);
}
.task-row.status-inprogress .task-state {
  color: var(--accent);
  background: rgba(47,225,255,0.12);
  border-color: rgba(47,225,255,0.25);
}
.task-row.status-blocked .task-state {
  color: #ffc8d4;
  background: rgba(255,104,136,0.12);
  border-color: rgba(255,104,136,0.25);
}
.task-row.status-done .task-state {
  color: var(--accent-3);
  background: rgba(112,255,218,0.12);
  border-color: rgba(112,255,218,0.24);
}

.task-detail p, .markdown-preview p, .phase-description p, .section-notes-preview p { margin: 0 0 0.8em; }
.task-detail p:last-child, .markdown-preview p:last-child, .phase-description p:last-child, .section-notes-preview p:last-child { margin-bottom: 0; }
.task-detail ul, .task-detail ol,
.markdown-preview ul, .markdown-preview ol,
.phase-description ul, .phase-description ol,
.section-notes-preview ul, .section-notes-preview ol {
  margin: 0.45em 0 0.9em 1.2em;
  padding: 0;
}
.task-detail code, .markdown-preview code, .phase-description code, .section-notes-preview code {
  padding: 0.16em 0.38em;
  border-radius: 8px;
  background: rgba(255,255,255,0.06);
  color: #cdf6ff;
  font-size: 0.92em;
}
.task-detail pre, .markdown-preview pre, .phase-description pre, .section-notes-preview pre, .task-code-block {
  margin: 0.9em 0 0;
  padding: 14px;
  border-radius: 14px;
  background: rgba(3, 8, 20, 0.84);
  border: 1px solid rgba(255,255,255,0.08);
  overflow: auto;
}
.task-code-wrap { margin-top: 14px; }
.task-code-meta-row { display: flex; flex-wrap: wrap; gap: 8px 12px; align-items: center; }
.task-code-label {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.78rem;
  color: var(--accent);
}
.task-code-location { color: var(--muted); font-size: 0.95rem; }
.task-actions { display: flex; justify-content: flex-end; margin-top: 14px; }
.task-edit-form { margin-top: 14px; }

.section-knowledge-panel { margin-top: 16px; padding: 18px; }
.section-notes-body { margin-top: 14px; }
.notes-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.preview-label-row { display: flex; justify-content: space-between; margin-bottom: 8px; }
.markdown-preview {
  min-height: 160px;
  padding: 16px;
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(3,8,20,0.6);
}
.section-files-panel { margin-top: 18px; padding-top: 16px; border-top: 1px solid rgba(255,255,255,0.08); }
.section-files-list { display: grid; gap: 10px; margin-top: 14px; }
.file-empty {
  padding: 14px;
  border-radius: 14px;
  border: 1px dashed rgba(255,255,255,0.12);
  color: var(--muted);
  background: rgba(255,255,255,0.02);
}
.file-item {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: flex-start;
  padding: 14px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.025);
}
.file-item-left { flex: 1; min-width: 0; }
.file-name { display: block; font-weight: 700; word-break: break-word; }
.file-meta { display: block; margin-top: 4px; color: var(--muted); font-size: 0.92rem; }

.notes-panel, .builder-panel, .log-panel { padding: 18px; }
.change-log-list { display: grid; gap: 10px; margin-top: 16px; }
.log-item {
  padding: 14px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.025);
}
.log-time {
  display: inline-block;
  margin-bottom: 6px;
  color: var(--accent-3);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.log-message { display: block; color: var(--text); font-weight: 600; }
.log-context { display: block; margin-top: 5px; color: var(--muted); font-size: 0.92rem; }
.notes-inline-status {
  color: var(--accent-3);
  font-size: 0.86rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.return-top-btn {
  position: fixed;
  right: 24px;
  bottom: 22px;
  width: 52px;
  height: 52px;
  border-radius: 999px;
  padding: 0;
  font-size: 1.4rem;
  z-index: 30;
  background: linear-gradient(180deg, rgba(47,225,255,0.2), rgba(187,108,255,0.16));
  border-color: rgba(47,225,255,0.24);
  box-shadow: 0 10px 24px rgba(0,0,0,0.35), 0 0 20px rgba(47,225,255,0.12);
}

.hidden { display: none !important; }
.section-hidden, .task-hidden { display: none !important; }
.preview-empty { font-style: italic; }

@media (max-width: 1200px) {
  .app-shell { grid-template-columns: 1fr; }
  .sidebar {
    position: static;
    height: auto;
    border-right: 0;
    border-bottom: 1px solid rgba(120,170,255,0.14);
  }
  .section-nav { max-height: 220px; }
}
@media (max-width: 900px) {
  .notes-grid, .task-grid, .section-grid { grid-template-columns: 1fr; }
  .phase-header, .hero, .filters-panel { flex-direction: column; align-items: stretch; }
  .phase-metrics { min-width: 0; width: 100%; }
  .phase-stats { text-align: left; }
}
@media (max-width: 700px) {
  .main-shell { padding: 16px; }
  .task-top-row {
    grid-template-columns: 1fr;
  }
  .task-right-controls {
    min-width: 0;
    width: 100%;
    justify-content: flex-start;
  }
  .summary-values { flex-direction: column; }
  .brand-line { width: 42px; }
  .brand-subtext { font-size: 0.88rem; letter-spacing: 0.3em; }
}