:root {
  --ink: #162126;
  --muted: #607079;
  --paper: #f7f4ee;
  --surface: #ffffff;
  --line: #d8ded7;
  --teal: #176b70;
  --teal-dark: #12343b;
  --gold: #c48a2c;
  --rose: #b95050;
  --blue: #315f9f;
  --green: #2f855a;
  --shadow: 0 14px 34px rgba(22, 33, 38, 0.1);
  color-scheme: light;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
  margin: 0;
}

body {
  background: var(--paper);
  color: var(--ink);
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  border: 0;
  cursor: pointer;
}

.app-shell {
  min-height: 100vh;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: minmax(220px, 1fr) auto;
  gap: 16px;
  align-items: center;
  padding: 14px clamp(16px, 3vw, 34px);
  background: rgba(247, 244, 238, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.brand {
  display: flex;
  gap: 12px;
  align-items: center;
  min-width: 0;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  color: #fff;
  background: var(--teal-dark);
  border-radius: 8px;
  font-weight: 800;
}

.brand-title {
  margin: 0;
  font-size: 18px;
  line-height: 1.2;
}

.brand-subtitle {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.role-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
}

.nav-button {
  min-height: 38px;
  padding: 8px 12px;
  color: var(--teal-dark);
  background: #e9eee8;
  border: 1px solid transparent;
  border-radius: 8px;
  white-space: nowrap;
}

.nav-button.active {
  color: #fff;
  background: var(--teal);
}

.sync-chip {
  display: inline-flex;
  min-height: 38px;
  max-width: 210px;
  flex-direction: column;
  justify-content: center;
  padding: 6px 10px;
  color: var(--teal-dark);
  background: #edf2ed;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 12px;
  line-height: 1.15;
}

.sync-chip span {
  margin-top: 2px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 600;
}

.sync-chip.green {
  color: #fff;
  background: var(--green);
  border-color: var(--green);
}

.sync-chip.green span,
.sync-chip.red span,
.sync-chip.blue span {
  color: rgba(255, 255, 255, 0.82);
}

.sync-chip.red {
  color: #fff;
  background: var(--rose);
  border-color: var(--rose);
}

.sync-chip.blue {
  color: #fff;
  background: var(--blue);
  border-color: var(--blue);
}

.sync-refresh {
  min-width: 54px;
}

.main {
  display: grid;
  gap: 18px;
  width: min(1280px, 100%);
  margin: 0 auto;
  padding: 20px clamp(14px, 3vw, 34px) 40px;
}

.status-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.protocol-panel {
  box-shadow: 0 10px 24px rgba(22, 33, 38, 0.06);
}

.protocol-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.protocol-list li {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 8px;
  min-height: 58px;
  align-items: start;
  padding: 10px;
  background: #f4f7f3;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--teal-dark);
  font-size: 13px;
  line-height: 1.35;
}

.protocol-index {
  display: grid;
  width: 24px;
  height: 24px;
  place-items: center;
  color: #fff;
  background: var(--teal);
  border-radius: 50%;
  font-size: 12px;
  font-weight: 800;
}

.metric {
  min-height: 88px;
  padding: 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 10px 24px rgba(22, 33, 38, 0.06);
}

.metric-label {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 12px;
}

.metric-value {
  margin: 0;
  font-size: clamp(20px, 2.4vw, 30px);
  font-weight: 800;
  line-height: 1.1;
}

.metric-note {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 12px;
}

.panel-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(340px, 0.75fr);
  gap: 18px;
  align-items: start;
}

.panel-grid.reverse {
  grid-template-columns: minmax(340px, 0.78fr) minmax(0, 1.22fr);
}

.panel {
  padding: 18px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.panel.compact {
  padding: 14px;
}

.panel-title-row {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 14px;
}

.panel-title-row.tight {
  margin-bottom: 10px;
}

.panel h2,
.panel h3 {
  margin: 0;
  line-height: 1.2;
}

.panel h2 {
  font-size: clamp(20px, 2.4vw, 28px);
}

.panel h3 {
  font-size: 17px;
}

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

.small {
  font-size: 12px;
}

.timer-board {
  display: grid;
  grid-template-columns: minmax(210px, 0.9fr) minmax(0, 1.1fr);
  gap: 16px;
}

.timer-face {
  display: grid;
  min-height: 230px;
  place-items: center;
  padding: 16px;
  color: #fff;
  background: linear-gradient(145deg, var(--teal-dark), #1f5f57);
  border-radius: 8px;
}

.timer-time {
  margin: 0;
  font-size: clamp(48px, 9vw, 86px);
  font-weight: 900;
  line-height: 1;
  letter-spacing: 0;
}

.timer-mode {
  margin: 14px 0 0;
  font-weight: 700;
}

.timer-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 18px;
}

.button {
  min-height: 42px;
  padding: 10px 14px;
  color: #fff;
  background: var(--teal);
  border-radius: 8px;
  font-weight: 750;
}

.button.secondary {
  color: var(--teal-dark);
  background: #e7eeec;
}

.button.warn {
  background: var(--rose);
}

.button.gold {
  background: var(--gold);
}

.button.full {
  width: 100%;
  margin-top: 10px;
}

.button.compact-button {
  min-height: 34px;
  padding: 7px 10px;
  white-space: nowrap;
}

.button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

.mission {
  display: grid;
  gap: 12px;
  align-content: start;
}

.mission-title {
  margin: 0;
  font-size: 22px;
  line-height: 1.25;
}

.mission-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.pill {
  display: inline-flex;
  min-height: 28px;
  align-items: center;
  padding: 5px 9px;
  color: var(--teal-dark);
  background: #edf2ed;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
}

.pill.green {
  color: #fff;
  background: var(--green);
  border-color: var(--green);
}

.pill.red {
  color: #fff;
  background: var(--rose);
  border-color: var(--rose);
}

.pill.blue {
  color: #fff;
  background: var(--blue);
  border-color: var(--blue);
}

.task-list,
.event-list,
.rubric-list,
.knowledge-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.task-item,
.event-item,
.knowledge-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  min-height: 64px;
  padding: 12px;
  background: #fbfcf9;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.task-index {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  color: #fff;
  background: var(--teal-dark);
  border-radius: 8px;
  font-size: 13px;
  font-weight: 800;
}

.task-name {
  margin: 0;
  font-weight: 800;
}

.task-detail {
  margin: 3px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.progress-track {
  height: 10px;
  overflow: hidden;
  background: #e7ebe4;
  border-radius: 999px;
}

.progress-bar {
  width: var(--value, 0%);
  height: 100%;
  background: linear-gradient(90deg, var(--teal), var(--gold));
}

.split-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.mini-block {
  padding: 12px;
  background: #fbfcf9;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.mini-block p {
  margin: 6px 0 0;
}

.tutor-field {
  margin-top: 12px;
}

.tutor-answer {
  margin-top: 10px;
}

.tutor-audit-box {
  gap: 12px;
}

.tutor-audit-list {
  margin-top: 2px;
}

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

.audit-stats .mini-block {
  padding: 10px;
}

.tutor-error {
  margin: 10px 0 0;
}

.device-setup-list {
  display: grid;
  gap: 10px;
  margin-top: 14px;
  padding: 12px;
  background: #fbfcf9;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.setup-check-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  padding: 10px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.setup-check-item input {
  width: 18px;
  height: 18px;
  margin-top: 2px;
}

.setup-check-item label {
  display: grid;
  gap: 4px;
}

.preserve-lines {
  white-space: pre-line;
}

.alert-list {
  display: grid;
  gap: 10px;
}

.alert {
  padding: 12px;
  border-left: 4px solid var(--gold);
  background: #fff9ec;
  border-radius: 8px;
}

.alert.critical {
  border-left-color: var(--rose);
  background: #fff1f1;
}

.alert.ok {
  border-left-color: var(--green);
  background: #effaf3;
}

.sync-note {
  display: grid;
  gap: 4px;
  margin-bottom: 12px;
  padding: 10px 12px;
  background: #fbfcf9;
  border: 1px solid var(--line);
  border-left: 4px solid var(--blue);
  border-radius: 8px;
}

.sync-note.green {
  border-left-color: var(--green);
}

.sync-note.red {
  border-left-color: var(--rose);
}

.sync-note span {
  color: var(--muted);
  font-size: 12px;
}

.notification-box,
.activity-box {
  display: grid;
  gap: 10px;
  padding: 12px;
  background: #fbfcf9;
  border: 1px solid var(--line);
  border-radius: 8px;
}

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

.notification-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  padding: 10px;
  background: #fff9ec;
  border: 1px solid #ead8b1;
  border-left: 4px solid var(--gold);
  border-radius: 8px;
}

.notification-item.critical {
  background: #fff1f1;
  border-color: #efc3c3;
  border-left-color: var(--rose);
}

.notification-item.read {
  background: #f4f7f3;
  border-color: var(--line);
  border-left-color: var(--green);
}

.notification-item p {
  margin: 5px 0 0;
}

.empty-state {
  padding: 12px;
  color: var(--muted);
  background: #f4f7f3;
  border: 1px dashed var(--line);
  border-radius: 8px;
  font-size: 13px;
}

.chart {
  display: grid;
  grid-template-columns: repeat(6, minmax(38px, 1fr));
  gap: 8px;
  align-items: end;
  min-height: 170px;
  padding-top: 12px;
}

.bar {
  display: grid;
  gap: 6px;
  align-items: end;
}

.bar-fill {
  min-height: 20px;
  height: var(--height);
  background: var(--teal);
  border-radius: 8px 8px 3px 3px;
}

.bar-label {
  color: var(--muted);
  font-size: 11px;
  text-align: center;
}

.table {
  width: 100%;
  border-collapse: collapse;
}

.table th,
.table td {
  padding: 10px 8px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.table th {
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.field {
  display: grid;
  gap: 6px;
}

.field label {
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  min-height: 42px;
  padding: 9px 10px;
  color: var(--ink);
  background: #fbfcf9;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.field textarea {
  min-height: 108px;
  resize: vertical;
}

.student-executor {
  display: grid;
  gap: 16px;
}

.single-task-shell {
  width: min(820px, 100%);
  margin: 0 auto;
}

.executor-screen {
  display: grid;
  gap: 14px;
}

.student-step-bar {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.step-chip {
  min-height: 40px;
  padding: 9px 10px;
  color: var(--muted);
  background: #f4f7f3;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 13px;
  font-weight: 800;
  text-align: center;
}

.step-chip.active {
  color: var(--teal-dark);
  background: #fff9ec;
  border-color: #e4c581;
}

.step-chip.done {
  color: #fff;
  background: var(--green);
  border-color: var(--green);
}

.single-action-card,
.student-complete-card {
  display: grid;
  gap: 14px;
  min-height: 330px;
  align-content: center;
  justify-items: start;
  padding: clamp(20px, 4vw, 34px);
  background: #fbfcf9;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.single-action-card h2,
.student-complete-card h2 {
  font-size: clamp(28px, 5vw, 44px);
}

.primary-action {
  width: min(420px, 100%);
  min-height: 58px;
  font-size: 18px;
}

.current-task-button {
  display: grid;
  gap: 14px;
  width: 100%;
  min-height: 360px;
  padding: clamp(20px, 4vw, 34px);
  color: var(--ink);
  background: #fff9ec;
  border: 2px solid #d7a344;
  border-radius: 8px;
  text-align: left;
  box-shadow: 0 14px 34px rgba(196, 138, 44, 0.14);
}

.current-task-button h2 {
  margin: 0;
  font-size: clamp(30px, 5.8vw, 52px);
  line-height: 1.08;
}

.current-task-button p {
  max-width: 680px;
  margin: 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.55;
}

.current-task-button strong {
  display: inline-grid;
  min-height: 56px;
  width: min(390px, 100%);
  place-items: center;
  color: #fff;
  background: var(--teal);
  border-radius: 8px;
  font-size: 18px;
  text-align: center;
}

.student-task-summary {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.single-current-task {
  grid-template-columns: minmax(170px, 0.58fr) minmax(0, 1.42fr);
}

.proof-flow {
  display: grid;
  gap: 12px;
}

.proof-actions {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.8fr);
  gap: 10px;
}

.student-only-note {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}

.executor-layout {
  display: grid;
  grid-template-columns: minmax(260px, 0.58fr) minmax(0, 1.42fr);
  gap: 16px;
  align-items: start;
}

.executor-steps {
  display: grid;
  gap: 10px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.executor-steps li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  min-height: 76px;
  padding: 12px;
  background: #fbfcf9;
  border: 1px solid var(--line);
  border-left: 5px solid #c9d5cf;
  border-radius: 8px;
}

.executor-steps li.active {
  border-left-color: var(--gold);
  background: #fff9ec;
}

.executor-steps li.done {
  border-left-color: var(--green);
  background: #effaf3;
}

.executor-steps p,
.executor-task-list p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.executor-index {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  color: #fff;
  background: var(--teal-dark);
  border-radius: 8px;
  font-weight: 850;
}

.executor-main {
  display: grid;
  gap: 12px;
}

.task-focus-card {
  display: grid;
  grid-template-columns: minmax(190px, 0.72fr) minmax(0, 1.28fr);
  gap: 14px;
  padding: 14px;
  background: #fbfcf9;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.executor-timer {
  min-height: 210px;
}

.offline-material-box {
  padding: 12px;
  background: #fff;
  border: 1px solid var(--line);
  border-left: 4px solid var(--blue);
  border-radius: 8px;
}

.offline-material-box p {
  margin: 6px 0 0;
  color: var(--muted);
}

.executor-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.proof-card {
  display: grid;
  gap: 12px;
  padding: 14px;
  background: #fbfcf9;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.executor-task-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.executor-task-list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  min-height: 76px;
  padding: 10px;
  background: #fbfcf9;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.executor-task-list li.current {
  border-color: var(--gold);
  background: #fff9ec;
}

.executor-task-list li.done {
  border-color: #b9dcc8;
  background: #effaf3;
}

.executor-task-list span {
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  color: #fff;
  background: var(--teal);
  border-radius: 8px;
  font-size: 12px;
  font-weight: 850;
}

.evidence-preview {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin-top: 10px;
}

.evidence-thumb {
  display: grid;
  gap: 6px;
  align-content: start;
  min-width: 0;
}

.evidence-thumb img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.evidence-thumb p {
  overflow: hidden;
  margin: 0;
  color: var(--muted);
  font-size: 11px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.footer-note {
  color: var(--muted);
  font-size: 12px;
  text-align: center;
}

.login-shell {
  display: grid;
  grid-template-columns: minmax(260px, 0.9fr) minmax(340px, 1fr);
  gap: 24px;
  align-items: center;
  width: min(980px, 100%);
  min-height: 100vh;
  margin: 0 auto;
  padding: 24px clamp(16px, 4vw, 44px);
}

.login-hero {
  display: grid;
  gap: 14px;
  align-content: center;
}

.login-hero .brand-mark {
  width: 58px;
  height: 58px;
}

.login-hero h1 {
  margin: 0;
  font-size: clamp(30px, 5vw, 56px);
  line-height: 1.05;
}

.login-hero p {
  max-width: 520px;
  margin: 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.6;
}

.login-panel {
  box-shadow: var(--shadow);
}

@media (max-width: 920px) {
  .topbar,
  .panel-grid,
  .panel-grid.reverse,
  .login-shell,
  .timer-board,
  .executor-layout,
  .task-focus-card {
    grid-template-columns: 1fr;
  }

  .role-nav {
    justify-content: flex-start;
  }

  .sync-chip {
    max-width: 100%;
  }

  .status-strip,
  .student-step-bar,
  .executor-task-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .protocol-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 620px) {
  .main {
    padding-inline: 12px;
  }

  .status-strip,
  .protocol-list,
  .split-list,
  .audit-stats,
  .form-grid {
    grid-template-columns: 1fr;
  }

  .task-item,
  .event-item,
  .knowledge-item {
    grid-template-columns: auto minmax(0, 1fr);
  }

  .task-item .pill,
  .event-item .pill,
  .knowledge-item .pill {
    grid-column: 2;
    justify-self: start;
  }

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

  .executor-steps li,
  .executor-actions,
  .proof-actions,
  .executor-task-list,
  .evidence-preview {
    grid-template-columns: 1fr;
  }

  .executor-steps li .button,
  .executor-steps li .pill {
    justify-self: start;
  }
}