:root {
  color-scheme: light;
  --bg: #f6f8fa;
  --surface: #ffffff;
  --surface-soft: #eef4f8;
  --field-bg: #ffffff;
  --chart-bg: #ffffff;
  --topbar-bg: rgba(246, 248, 250, 0.94);
  --ink: #18222f;
  --muted: #647284;
  --line: #d8e0e8;
  --blue: #2463eb;
  --blue-ink: #ffffff;
  --green: #0d8a61;
  --amber: #9a5b00;
  --red: #bf3630;
  --success-bg: #e7f7f0;
  --success-border: #a8ddca;
  --warn-bg: #fff2d9;
  --danger-bg: #ffe5e3;
  --danger-border: #f0b2ad;
  --empty-bg: rgba(255, 255, 255, 0.55);
  --focus: #1d9bd1;
  --shadow: 0 10px 30px rgba(20, 35, 48, 0.08);
}

[data-theme="dark"] {
  color-scheme: dark;
  --bg: #101419;
  --surface: #171d24;
  --surface-soft: #222b35;
  --field-bg: #111820;
  --chart-bg: #141a21;
  --topbar-bg: rgba(16, 20, 25, 0.94);
  --ink: #eef3f8;
  --muted: #9facba;
  --line: #303b47;
  --blue: #6ea2ff;
  --blue-ink: #07111f;
  --green: #54d19b;
  --amber: #f1b95a;
  --red: #ff8a82;
  --success-bg: #15352b;
  --success-border: #2b6e55;
  --warn-bg: #352816;
  --danger-bg: #3d1c1f;
  --danger-border: #7c383d;
  --empty-bg: rgba(255, 255, 255, 0.04);
  --focus: #6ec7ed;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.28);
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--bg);
}

body {
  min-height: 100%;
  margin: 0;
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  line-height: 1.45;
  letter-spacing: 0;
}

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

button {
  border: 0;
}

a {
  color: var(--blue);
}

.auth-page,
.app-shell {
  width: min(100%, 1040px);
  margin: 0 auto;
  padding: 18px;
}

.auth-page {
  min-height: 100vh;
  display: grid;
  align-content: center;
  gap: 18px;
}

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

.brand-row {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.brand-row h1 {
  flex: 1 1 220px;
}

.brand h1,
.page-title h1 {
  margin: 0;
  font-size: clamp(2rem, 8vw, 4.5rem);
  line-height: 0.95;
  letter-spacing: 0;
}

.brand p,
.page-title p {
  max-width: 58ch;
  margin: 0;
  color: var(--muted);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 5;
  margin: -18px -18px 16px;
  padding: 14px 18px 12px;
  background: var(--topbar-bg);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.topbar-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.topbar-user,
.person-row {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.topbar-user > div,
.person-row > div {
  min-width: 0;
}

.topbar strong {
  display: block;
  max-width: 46vw;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.topbar small {
  display: block;
  color: var(--muted);
}

.topbar-actions {
  display: flex;
  align-items: center;
  justify-content: end;
  gap: 8px;
  flex-wrap: wrap;
}

.avatar {
  display: block;
  flex: 0 0 auto;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--surface-soft);
  object-fit: cover;
}

.avatar-sm {
  width: 34px;
  height: 34px;
}

.avatar-md {
  width: 44px;
  height: 44px;
}

.avatar-xl {
  width: 92px;
  height: 92px;
}

.avatar-fallback {
  display: grid;
  place-items: center;
  color: var(--ink);
  font-weight: 800;
}

.avatar-upload {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: center;
  margin-bottom: 16px;
}

.profile-title {
  display: flex;
  align-items: center;
  gap: 16px;
}

.profile-title h1 {
  overflow-wrap: anywhere;
}

.nav {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 6px;
  margin-top: 12px;
}

.nav button,
.tabs button {
  min-height: 42px;
  padding: 8px 6px;
  border: 1px solid transparent;
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}

.nav button.active,
.tabs button.active {
  border-color: var(--line);
  background: var(--surface);
  color: var(--ink);
  box-shadow: var(--shadow);
}

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

.stack {
  display: grid;
  gap: 14px;
}

.grid {
  display: grid;
  gap: 14px;
}

.grid.compact {
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
}

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

.panel {
  padding: 16px;
}

.item {
  padding: 14px;
}

.history-row {
  position: relative;
  display: block;
  width: 100%;
  text-align: left;
  color: inherit;
  cursor: pointer;
  transition:
    border-color 140ms ease,
    transform 140ms ease,
    background 140ms ease;
}

.history-row:hover {
  border-color: var(--focus);
  transform: translateY(-1px);
}

.history-tooltip {
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: calc(100% + 8px);
  z-index: 4;
  display: none;
  max-width: min(360px, calc(100vw - 64px));
  padding: 9px 11px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--ink);
  box-shadow: var(--shadow);
  font-size: 0.9rem;
  line-height: 1.35;
  overflow-wrap: anywhere;
}

.history-tooltip::after {
  content: "";
  position: absolute;
  left: 18px;
  bottom: -6px;
  width: 10px;
  height: 10px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--surface);
  transform: rotate(45deg);
}

.history-row:hover .history-tooltip,
.history-row:focus-visible .history-tooltip {
  display: block;
}

.history-row-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  align-items: center;
}

.history-row-grid strong,
.history-row-grid span {
  display: block;
}

.history-row-grid span {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
}

.history-row-grid p {
  margin: 0;
  color: var(--muted);
  overflow-wrap: anywhere;
}

.history-weight {
  text-align: left;
}

.history-controls {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  align-items: end;
}

.connection-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
}

.connection-row h3,
.connection-row p {
  margin: 0;
}

.connection-row p {
  margin-top: 5px;
}

.social-detail {
  margin-bottom: 14px;
}

.social-checkin-row {
  display: grid;
  grid-template-columns: minmax(88px, 0.75fr) minmax(0, 1.4fr) auto;
  align-items: center;
  gap: 12px;
}

.social-checkin-row h3,
.social-checkin-row p {
  margin: 0;
}

.social-checkin-row p {
  min-width: 0;
  overflow-wrap: anywhere;
}

.social-checkin-row .pill {
  justify-self: end;
}

.section-head,
.item-head,
.actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.section-head {
  margin-bottom: 12px;
}

.section-head h2,
.item h3,
.panel h2,
.panel h3 {
  margin: 0;
  font-size: 1rem;
  line-height: 1.2;
}

.item p,
.panel p,
.muted {
  color: var(--muted);
}

.item p,
.panel p {
  margin: 6px 0 0;
}

.form {
  display: grid;
  gap: 12px;
}

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

.field label {
  font-size: 0.86rem;
  font-weight: 700;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  min-height: 44px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--field-bg);
  color: var(--ink);
}

.field textarea {
  min-height: 92px;
  resize: vertical;
}

.field input:focus,
.field select:focus,
.field textarea:focus,
button:focus-visible {
  outline: 3px solid rgba(29, 155, 209, 0.24);
  outline-offset: 2px;
  border-color: var(--focus);
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.button {
  min-height: 42px;
  padding: 9px 12px;
  border-radius: 8px;
  background: var(--surface-soft);
  color: var(--ink);
  cursor: pointer;
  font-weight: 750;
}

.button.primary {
  background: var(--blue);
  color: var(--blue-ink);
}

.button.warn {
  background: var(--warn-bg);
  color: var(--amber);
}

.button.success {
  background: var(--success-bg);
  color: var(--green);
}

.button.danger {
  background: var(--danger-bg);
  color: var(--red);
}

.button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.notice {
  padding: 12px 14px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--surface);
}

.notice.error {
  border-color: var(--danger-border);
  background: var(--danger-bg);
  color: var(--red);
}

.notice.success {
  border-color: var(--success-border);
  background: var(--success-bg);
  color: var(--green);
}

.pill {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  max-width: 100%;
  padding: 4px 8px;
  border-radius: 999px;
  background: var(--surface-soft);
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 800;
  white-space: nowrap;
}

.pill.ahead,
.pill.on_track,
.pill.connected {
  background: var(--success-bg);
  color: var(--green);
}

.pill.behind,
.pill.error {
  background: var(--danger-bg);
  color: var(--red);
}

.pill.waiting,
.pill.requested,
.pill.incoming,
.pill.invited {
  background: var(--warn-bg);
  color: var(--amber);
}

.progress {
  position: relative;
  width: 100%;
  height: 10px;
  overflow: hidden;
  border-radius: 999px;
  background: var(--surface-soft);
}

.progress span {
  display: block;
  height: 100%;
  width: var(--value, 0%);
  min-width: 2px;
  max-width: 100%;
  background: linear-gradient(90deg, var(--green), var(--blue));
}

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

.goal-card {
  display: grid;
  gap: 12px;
}

.goal-card > p {
  margin: 0;
}

.goal-card .metric-row {
  margin-top: 2px;
}

.goal-actions {
  justify-content: flex-end;
  margin-top: 2px;
}

.join-goal-note {
  display: grid;
  gap: 4px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--field-bg);
}

.join-goal-note p,
.compact-copy {
  margin: 0;
}

.challenge-goal-summary {
  display: grid;
  gap: 10px;
}

.challenge-goal-summary > p {
  margin: 0;
  color: var(--ink);
}

.challenge-goal-summary strong {
  font-weight: 800;
}

.field input[readonly] {
  color: var(--muted);
}

.metric {
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--field-bg);
}

.challenge-member-metric {
  border-color: var(--member-color);
}

.challenge-member-metric strong,
.challenge-member-metric span {
  color: var(--member-color);
}

.member-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.line-toggle {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--member-color);
  font-size: 0.78rem;
  font-weight: 800;
}

.line-toggle input {
  width: 15px;
  height: 15px;
  accent-color: var(--member-color);
}

.metric strong {
  display: block;
  overflow-wrap: anywhere;
}

.metric span {
  color: var(--muted);
  font-size: 0.84rem;
}

.chart {
  width: 100%;
  aspect-ratio: 16 / 9;
  min-height: 220px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--chart-bg);
}

.embedded-goal-chart {
  display: grid;
  gap: 12px;
  padding-top: 4px;
}

.chart-toggle-row {
  width: 100%;
  min-height: 34px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--field-bg);
  color: var(--muted);
  cursor: pointer;
  font-size: 1.15rem;
  font-weight: 800;
}

.chart-toggle-row:hover {
  border-color: var(--focus);
  color: var(--ink);
}

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

.checkbox {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 36px;
}

.checkbox input {
  width: 18px;
  height: 18px;
}

.empty {
  padding: 18px;
  border: 1px dashed var(--line);
  border-radius: 8px;
  color: var(--muted);
  background: var(--empty-bg);
}

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

.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: grid;
  place-items: end center;
  padding: 16px;
  background: rgba(7, 13, 20, 0.62);
}

.modal {
  width: min(100%, 520px);
  max-height: min(92vh, 720px);
  overflow: auto;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--ink);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.32);
}

.modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 12px;
}

.modal-head h2 {
  margin: 0;
  font-size: 1.1rem;
  line-height: 1.2;
}

.calendar-title {
  margin: 2px 0 12px;
  font-size: 1.05rem;
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 6px;
}

.calendar-weekdays {
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
  text-align: center;
}

.calendar-cell {
  position: relative;
  display: grid;
  grid-template-rows: auto 1fr;
  min-height: 74px;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--field-bg);
  color: var(--ink);
  text-align: left;
  overflow: hidden;
}

.calendar-cell:disabled {
  color: var(--muted);
  cursor: default;
  opacity: 0.6;
}

.calendar-cell.has-checkin {
  cursor: pointer;
  border-color: var(--success-border);
  background:
    linear-gradient(180deg, var(--success-bg), var(--field-bg) 62%);
  box-shadow: inset 0 3px 0 var(--green);
}

.calendar-cell:not(.empty-cell) {
  cursor: pointer;
}

.calendar-cell.today-cell {
  border-color: var(--blue);
  box-shadow: inset 0 0 0 1px var(--blue);
}

.calendar-cell.has-checkin.today-cell {
  box-shadow:
    inset 0 3px 0 var(--green),
    inset 0 0 0 1px var(--blue);
}

.calendar-cell.has-checkin:hover {
  border-color: var(--focus);
}

.calendar-day {
  display: block;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
}

.calendar-note-indicator {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 13px;
  height: 15px;
  border: 1px solid var(--amber);
  border-radius: 3px;
  background: var(--warn-bg);
}

.calendar-note-indicator::after {
  content: "";
  position: absolute;
  top: -1px;
  right: -1px;
  width: 5px;
  height: 5px;
  border-left: 1px solid var(--amber);
  border-bottom: 1px solid var(--amber);
  border-bottom-left-radius: 2px;
  background: var(--field-bg);
}

.calendar-metrics {
  align-self: end;
  display: grid;
  gap: 1px;
  line-height: 1.16;
  overflow-wrap: anywhere;
}

.calendar-metric.primary {
  color: var(--ink);
  font-size: 0.86rem;
  font-weight: 750;
}

.calendar-metric.secondary {
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 600;
}

.empty-cell {
  visibility: hidden;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 42px;
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--ink);
  box-shadow: var(--shadow);
  cursor: pointer;
  font-weight: 750;
}

.theme-toggle input {
  width: 38px;
  height: 22px;
  appearance: none;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface-soft);
  cursor: pointer;
  position: relative;
}

.theme-toggle input::before {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--muted);
  transition: transform 140ms ease, background 140ms ease;
}

.theme-toggle input:checked::before {
  transform: translateX(16px);
  background: var(--blue);
}

@media (min-width: 760px) {
  .auth-page,
  .app-shell {
    padding: 28px;
  }

  .topbar {
    margin: -28px -28px 22px;
    padding: 16px 28px 14px;
  }

  .grid.two {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    align-items: start;
  }

  .grid.three {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .history-controls {
    grid-template-columns: minmax(0, 180px) minmax(0, 180px) auto;
  }

  .history-row-grid {
    grid-template-columns: minmax(120px, 0.7fr) minmax(0, 1.5fr) minmax(95px, 0.5fr);
  }

  .history-weight {
    text-align: right;
  }

  .social-detail {
    gap: 14px;
  }

  .nav {
    display: flex;
  }

  .nav button {
    padding-inline: 14px;
  }

  .auth-card {
    width: min(100%, 480px);
  }

  .modal-backdrop {
    place-items: center;
  }
}