:root {
  color-scheme: dark;
  --bg: #071014;
  --ink: #f4faf8;
  --ink-soft: #d9e4e1;
  --muted: #9cacaa;
  --muted-strong: #bfcbc8;
  --panel: rgba(8, 15, 19, 0.58);
  --panel-strong: rgba(10, 18, 23, 0.76);
  --panel-deep: rgba(4, 9, 12, 0.86);
  --panel-faint: rgba(255, 255, 255, 0.08);
  --line: rgba(231, 244, 240, 0.16);
  --line-strong: rgba(231, 244, 240, 0.28);
  --line-warm: rgba(233, 191, 116, 0.34);
  --accent: #78e0d2;
  --accent-2: #e7a6b7;
  --accent-3: #e9bf74;
  --good: #7ee2a8;
  --warn: #e9bf74;
  --danger: #f39aa9;
  --shadow: 0 28px 90px rgba(0, 0, 0, 0.46);
  --shadow-soft: 0 14px 38px rgba(0, 0, 0, 0.28);
  --radius: 8px;
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

html {
  background: var(--bg);
}

body {
  position: relative;
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
  color: var(--ink);
  overflow-x: hidden;
  background:
    linear-gradient(90deg, rgba(4, 9, 12, 0.88), rgba(4, 9, 12, 0.54) 38%, rgba(4, 9, 12, 0.68) 100%),
    linear-gradient(180deg, rgba(6, 13, 17, 0.16), rgba(6, 13, 17, 0.82)),
    url("/static/brain-orbital-observatory.webp"),
    var(--bg);
  background-attachment: fixed;
  background-position: center;
  background-size: cover;
}

/* The image carries the interface mood, so overlays stay structural and keep text readable. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(120, 224, 210, 0.12) 1px, transparent 1px),
    linear-gradient(0deg, rgba(255, 255, 255, 0.07) 1px, transparent 1px),
    linear-gradient(135deg, rgba(120, 224, 210, 0.12), transparent 34%),
    linear-gradient(245deg, rgba(231, 166, 183, 0.12), transparent 35%);
  background-size: 72px 72px, 72px 72px, auto, auto;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.78), transparent 88%);
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(ellipse at top, rgba(255, 255, 255, 0.16), transparent 42%),
    linear-gradient(180deg, transparent 0%, rgba(2, 5, 7, 0.34) 70%, rgba(2, 5, 7, 0.82) 100%);
}

button,
input,
textarea,
select {
  font: inherit;
  letter-spacing: 0;
}

button {
  min-height: 40px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.08);
  color: var(--ink);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.16) inset,
    0 -1px 0 rgba(0, 0, 0, 0.24) inset;
  cursor: pointer;
}

button:hover,
button:focus-visible {
  border-color: rgba(120, 224, 210, 0.58);
  background: rgba(120, 224, 210, 0.12);
  outline: none;
}

button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 2px solid rgba(120, 224, 210, 0.38);
  outline-offset: 2px;
}

input,
textarea,
select {
  color: var(--ink);
}

.glass-panel {
  border: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.11), rgba(255, 255, 255, 0.045)),
    var(--panel);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.18) inset,
    0 -1px 0 rgba(0, 0, 0, 0.24) inset,
    var(--shadow);
  backdrop-filter: blur(28px) saturate(1.25);
  -webkit-backdrop-filter: blur(28px) saturate(1.25);
}

.eyebrow {
  margin: 0 0 5px;
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
}

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

.login-page {
  display: grid;
  min-height: 100vh;
  place-items: center;
  padding: 24px;
}

.login-shell {
  width: min(100%, 460px);
}

.login-card {
  position: relative;
  overflow: hidden;
  padding: 30px;
  border-radius: var(--radius);
  background:
    linear-gradient(145deg, rgba(7, 16, 20, 0.86), rgba(15, 28, 34, 0.64)),
    rgba(7, 16, 20, 0.68);
}

.login-card::before {
  content: "";
  display: block;
  height: 132px;
  margin: -30px -30px 24px;
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(4, 9, 12, 0.06), rgba(4, 9, 12, 0.28)),
    url("/static/brain-orbital-observatory.webp");
  background-position: center;
  background-size: cover;
}

.login-card h1 {
  margin: 0;
  max-width: 11ch;
  color: var(--ink);
  font-size: clamp(2rem, 6vw, 3rem);
  line-height: 0.96;
}

.login-card p {
  max-width: 34rem;
}

.login-form {
  display: grid;
  gap: 10px;
  margin-top: 24px;
}

.login-form input,
.pane-heading input,
.quick-input textarea,
.quick-input select,
.note-editor textarea,
.mode-card textarea,
.mode-card input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(4, 9, 12, 0.44);
  color: var(--ink);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.12) inset;
}

.login-form input {
  min-height: 48px;
  padding: 0 12px;
}

.login-form button,
.quick-input button,
.note-editor button,
.mode-card button {
  color: #031011;
  border-color: rgba(120, 224, 210, 0.48);
  background: linear-gradient(135deg, var(--accent), #d8f7ef);
  box-shadow: 0 18px 34px rgba(120, 224, 210, 0.18);
  font-weight: 800;
}

.app-shell {
  display: grid;
  grid-template-columns: 292px minmax(0, 1fr);
  gap: 16px;
  min-height: 100vh;
  max-width: 2240px;
  margin: 0 auto;
  padding: 18px 18px 104px;
}

.folder-rail {
  position: sticky;
  top: 18px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  height: calc(100vh - 36px);
  padding: 16px;
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(5, 11, 14, 0.88), rgba(8, 15, 19, 0.62)),
    rgba(5, 11, 14, 0.72);
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(120, 224, 210, 0.96), rgba(233, 191, 116, 0.88));
  color: #061116;
  font-weight: 900;
  box-shadow: 0 18px 34px rgba(0, 0, 0, 0.24);
}

.brand-lockup h1,
.topbar h2,
.pane-heading h3 {
  margin: 0;
}

.brand-lockup h1 {
  font-size: 1.3rem;
}

.folder-list {
  display: grid;
  gap: 8px;
}

.folder-button {
  display: grid;
  min-height: 60px;
  padding: 10px 11px;
  text-align: left;
  border-color: rgba(255, 255, 255, 0.13);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.035));
}

.folder-button span {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  width: 100%;
  color: var(--ink);
  font-weight: 760;
}

.folder-button small {
  color: var(--muted);
}

.folder-button.is-active,
.mobile-folder-strip button.is-active,
.todo-tabs button.is-active {
  border-color: rgba(120, 224, 210, 0.58);
  background:
    linear-gradient(135deg, rgba(120, 224, 210, 0.18), rgba(233, 191, 116, 0.1));
}

.count-badge,
.mobile-folder-strip [data-folder-count] {
  display: inline-grid;
  min-width: 24px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  color: inherit;
  font-size: 0.72rem;
  font-weight: 800;
}

.logout-form {
  margin-top: auto;
}

.logout-form button {
  width: 100%;
  color: var(--muted-strong);
}

.workspace {
  display: grid;
  gap: 16px;
  min-width: 0;
  align-content: start;
}

.topbar {
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: minmax(260px, 1fr) auto;
  grid-template-areas:
    "title metrics"
    "title modes";
  align-items: center;
  gap: 14px 18px;
  min-height: 150px;
  padding: 20px;
  border-radius: var(--radius);
  border-color: rgba(255, 255, 255, 0.18);
  background:
    linear-gradient(120deg, rgba(4, 9, 12, 0.78), rgba(15, 36, 40, 0.58) 48%, rgba(96, 54, 64, 0.42)),
    rgba(5, 11, 14, 0.62);
}

.topbar::after {
  content: "";
  position: absolute;
  left: 20px;
  right: 20px;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(120, 224, 210, 0.72), rgba(233, 191, 116, 0.58), transparent);
}

.topbar > div:first-child {
  grid-area: title;
}

.topbar h2 {
  max-width: 13ch;
  color: var(--ink);
  font-size: clamp(2.25rem, 4.4vw, 4.9rem);
  line-height: 0.92;
}

.top-metrics,
.mode-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.top-metrics {
  grid-area: metrics;
  justify-content: flex-end;
}

.metric-pill {
  display: inline-grid;
  min-width: 86px;
  min-height: 48px;
  align-content: center;
  padding: 6px 11px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.08);
  color: var(--muted-strong);
  font-size: 0.76rem;
  box-shadow: var(--shadow-soft);
}

.metric-pill strong {
  color: var(--ink);
  font-size: 1.15rem;
  line-height: 1;
}

.mode-buttons {
  grid-area: modes;
  justify-content: flex-end;
}

.mode-buttons button {
  color: var(--ink);
  border-color: rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.08);
}

.mobile-folder-strip {
  display: none;
}

.content-grid {
  display: grid;
  grid-template-columns: minmax(340px, 0.32fr) minmax(0, 1fr);
  gap: 16px;
  height: clamp(340px, calc(100vh - 384px), 940px);
  min-height: 0;
}

.list-pane,
.detail-pane {
  min-width: 0;
  overflow: hidden;
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(9, 18, 23, 0.72), rgba(9, 18, 23, 0.52)),
    rgba(9, 18, 23, 0.5);
}

.list-pane {
  display: flex;
  flex-direction: column;
}

.pane-heading {
  display: grid;
  grid-template-columns: 1fr minmax(160px, 260px);
  gap: 12px;
  align-items: end;
  padding: 16px;
  border-bottom: 1px solid var(--line);
}

.pane-heading input {
  min-height: 40px;
  padding: 0 12px;
}

.todo-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--line);
}

.scroll-list {
  flex: 1;
  min-height: 0;
  overflow: auto;
  padding: 10px;
  scrollbar-color: rgba(120, 224, 210, 0.34) rgba(255, 255, 255, 0.06);
}

.list-item {
  display: grid;
  gap: 5px;
  width: 100%;
  min-height: 72px;
  margin-bottom: 8px;
  padding: 11px;
  text-align: left;
  border: 1px solid rgba(255, 255, 255, 0.11);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.11), rgba(255, 255, 255, 0.04));
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.11) inset;
}

.todo-card {
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
}

.todo-action {
  min-width: 98px;
  border-color: rgba(120, 224, 210, 0.24);
  background: rgba(120, 224, 210, 0.1);
}

.list-item strong {
  color: var(--ink);
  overflow-wrap: anywhere;
}

.list-item small,
.meta-line {
  color: var(--muted);
}

.detail-content {
  min-height: 100%;
  padding: 18px;
  overflow: auto;
  scrollbar-color: rgba(120, 224, 210, 0.34) rgba(255, 255, 255, 0.06);
}

.detail-content h2,
.detail-content h3 {
  margin-top: 0;
}

.detail-content h2 {
  color: var(--ink);
  font-size: clamp(1.6rem, 2.4vw, 2.45rem);
  line-height: 1;
}

.stats-grid,
.summary-strip {
  display: grid;
  gap: 10px;
}

.stats-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.summary-strip {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-bottom: 12px;
}

.stat-card,
.note-editor,
.frontmatter-box,
.mode-card,
.result-card {
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.04));
  padding: 12px;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.1) inset;
}

.stat-card strong {
  display: block;
  color: var(--accent-3);
  font-size: 1.55rem;
}

.note-editor,
.mode-card {
  display: grid;
  gap: 10px;
}

.note-editor textarea,
.mode-card textarea,
.mode-card input {
  padding: 10px;
}

.note-editor textarea {
  min-height: 360px;
  resize: vertical;
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
}

pre {
  overflow: auto;
  white-space: pre-wrap;
}

.quick-input {
  position: fixed;
  left: 50%;
  bottom: max(14px, var(--safe-bottom));
  z-index: 20;
  display: grid;
  grid-template-columns: 118px minmax(0, 1fr) 90px;
  align-items: end;
  gap: 8px;
  width: min(940px, calc(100vw - 28px));
  padding: 9px;
  border-radius: var(--radius);
  transform: translateX(-50%);
  border-color: rgba(255, 255, 255, 0.28);
  background:
    linear-gradient(180deg, rgba(14, 26, 31, 0.84), rgba(5, 11, 14, 0.76)),
    rgba(5, 11, 14, 0.72);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.18) inset,
    0 24px 74px rgba(0, 0, 0, 0.56);
}

.quick-input textarea {
  min-height: 42px;
  max-height: 120px;
  padding: 10px 12px;
  resize: none;
}

.quick-input select {
  min-height: 42px;
  padding: 0 8px;
}

.quick-status {
  grid-column: 2 / 3;
  min-height: 18px;
  margin: -2px 0 0;
  color: var(--muted);
  font-size: 0.78rem;
}

.quick-input button:disabled,
.quick-input textarea:disabled,
.quick-input select:disabled,
.todo-action:disabled {
  cursor: progress;
  opacity: 0.68;
}

.command-history {
  position: fixed;
  right: 16px;
  bottom: calc(96px + var(--safe-bottom));
  z-index: 18;
  display: none;
  width: min(360px, calc(100vw - 28px));
  padding: 10px;
  border-radius: var(--radius);
}

.command-history.is-visible {
  display: grid;
  gap: 8px;
}

.history-item {
  display: grid;
  justify-items: start;
  gap: 2px;
  width: 100%;
  min-height: 48px;
  text-align: left;
}

.history-item span {
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
}

.history-item strong {
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: calc(86px + var(--safe-bottom));
  z-index: 30;
  width: min(520px, calc(100vw - 28px));
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel-strong);
  box-shadow: var(--shadow);
  transform: translateX(-50%);
}

.mobile-explorer {
  display: none;
}

.mobile-sheet-handle {
  width: 44px;
  height: 4px;
  margin: 2px auto 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.28);
}

.mobile-sheet-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.mobile-sheet-header h3 {
  margin: 0;
}

.mobile-list-content {
  max-height: min(56vh, 520px);
  overflow: auto;
  padding-top: 10px;
}

@media (min-width: 1800px) {
  .app-shell {
    grid-template-columns: 314px minmax(0, 1fr);
    gap: 20px;
    padding: 22px 24px 112px;
  }

  .content-grid {
    grid-template-columns: minmax(430px, 0.29fr) minmax(0, 1fr);
  }
}

@media (max-width: 980px) {
  .topbar {
    grid-template-columns: 1fr;
    grid-template-areas:
      "title"
      "metrics"
      "modes";
  }

  .top-metrics,
  .mode-buttons {
    justify-content: flex-start;
  }

  .content-grid {
    grid-template-columns: minmax(300px, 0.42fr) minmax(0, 1fr);
  }
}

@media (max-width: 780px) {
  body {
    background:
      linear-gradient(180deg, rgba(4, 9, 12, 0.6), rgba(4, 9, 12, 0.84)),
      linear-gradient(90deg, rgba(4, 9, 12, 0.52), rgba(4, 9, 12, 0.26)),
      url("/static/brain-orbital-observatory.webp"),
      var(--bg);
    background-position: center top;
    background-size: auto 100%;
  }

  .app-shell {
    display: block;
    padding: 8px 8px calc(132px + var(--safe-bottom));
  }

  .folder-rail {
    display: none;
  }

  .workspace {
    gap: 10px;
  }

  .topbar {
    min-height: auto;
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 14px;
  }

  .topbar h2 {
    max-width: 9ch;
    font-size: clamp(2rem, 13vw, 3.35rem);
  }

  .top-metrics {
    width: 100%;
  }

  .metric-pill {
    flex: 1 1 30%;
    min-width: 0;
  }

  .mode-buttons {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    width: 100%;
  }

  .mode-buttons button {
    min-width: 0;
    padding: 0 8px;
  }

  .mobile-folder-strip {
    position: sticky;
    top: 8px;
    z-index: 10;
    display: grid;
    grid-auto-flow: column;
    grid-auto-columns: minmax(92px, 1fr);
    gap: 7px;
    overflow-x: auto;
    overscroll-behavior-x: contain;
    padding: 8px;
    border-radius: var(--radius);
    scrollbar-width: none;
  }

  .mobile-folder-strip::-webkit-scrollbar {
    display: none;
  }

  .mobile-folder-strip button {
    min-width: 0;
    min-height: 48px;
    padding: 0 8px;
    font-size: 0.76rem;
    line-height: 1.1;
    white-space: normal;
  }

  .content-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
    height: auto;
    min-height: auto;
  }

  .pane-heading {
    grid-template-columns: 1fr;
  }

  .scroll-list {
    max-height: 30vh;
  }

  .detail-content {
    min-height: 42vh;
  }

  .stats-grid,
  .summary-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .quick-input {
    width: calc(100vw - 14px);
    grid-template-columns: minmax(82px, 0.28fr) minmax(0, 1fr) 66px;
    bottom: max(7px, var(--safe-bottom));
    gap: 7px;
    padding: 8px;
  }

  .quick-input textarea {
    min-height: 44px;
  }

  .quick-status {
    grid-column: 1 / -1;
    order: 4;
  }

  .command-history {
    right: 7px;
    left: 7px;
    bottom: calc(116px + var(--safe-bottom));
    width: auto;
  }

  .todo-card {
    grid-template-columns: 1fr;
  }

  .todo-action {
    justify-self: stretch;
  }

  .mobile-explorer {
    position: fixed;
    right: 8px;
    bottom: calc(102px + var(--safe-bottom));
    left: 8px;
    z-index: 42;
    display: block;
    max-height: min(64vh, 560px);
    padding: 12px;
    border-radius: var(--radius);
    opacity: 0;
    pointer-events: none;
    transform: translateY(calc(100% + 24px));
  }

  .mobile-explorer.is-open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  body.mobile-sheet-open {
    overflow: hidden;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .app-shell {
    animation: surface-in 440ms cubic-bezier(0.2, 0.8, 0.2, 1) both;
  }

  .topbar,
  .folder-rail,
  .content-grid,
  .quick-input {
    animation: surface-in 520ms cubic-bezier(0.2, 0.8, 0.2, 1) both;
  }

  button,
  .list-item,
  .glass-panel,
  .mobile-explorer {
    transition:
      border-color 180ms ease,
      background-color 180ms ease,
      box-shadow 180ms ease,
      opacity 180ms ease,
      transform 180ms ease;
  }

  button:hover,
  .list-item:hover {
    transform: translateY(-1px);
  }

  .toast {
    animation: toast-in 180ms ease both;
  }

  .quick-status {
    transition: color 180ms ease;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
    animation: none !important;
  }
}

@keyframes surface-in {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translate(-50%, 8px);
  }
  to {
    opacity: 1;
    transform: translate(-50%, 0);
  }
}