:root {
  color-scheme: light;
  --bg: #f7f6f2;
  --surface: #ffffff;
  --surface-2: #fbfaf7;
  --line: #dedbd2;
  --line-strong: #bdb7aa;
  --text: #202427;
  --muted: #5e666b;
  --muted-soft: #7d8589;
  --accent: #2f6871;
  --accent-soft: #e6f0f1;
  --break: #8a5d4d;
  --break-soft: #f2e9e4;
  --danger: #9f4635;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #111111;
  --surface: #181818;
  --surface-2: #202020;
  --line: #303030;
  --line-strong: #4a4a4a;
  --text: #eeeeee;
  --muted: #b8b8b8;
  --muted-soft: #8d8d8d;
  --accent: #8f9f81;
  --accent-soft: #25291f;
  --break: #c29a86;
  --break-soft: #2a211d;
  --danger: #d98a78;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 15px;
  line-height: 1.5;
}

button,
input,
select {
  font: inherit;
}

.site-header,
.page {
  width: min(calc(100% - 32px), 1040px);
  margin: 0 auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: inherit;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--surface);
  color: var(--text);
  font-weight: 700;
}

.brand strong,
.brand small {
  display: block;
}

.brand small {
  color: var(--muted);
  font-size: 0.78rem;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.sync-status {
  display: inline-flex;
  min-height: 32px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0 10px;
  background: var(--surface-2);
  color: var(--muted);
  font-size: 0.82rem;
}

.page {
  padding: 26px 0 56px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(180px, 0.8fr) minmax(280px, 1.2fr);
  gap: 8px 24px;
  align-items: end;
  margin-bottom: 22px;
}

.hero .meta {
  grid-column: 1 / -1;
}

.hero h1 {
  grid-column: 1;
}

.hero .lead {
  grid-column: 2;
}

.meta {
  margin: 0 0 6px;
  color: var(--muted);
  font-size: 0.8rem;
}

h1,
h2,
h3,
p {
  margin: 0;
}

h1 {
  font-size: clamp(2rem, 4vw, 3.1rem);
  line-height: 1;
  letter-spacing: -0.05em;
}

h2 {
  font-size: clamp(1.25rem, 2vw, 1.55rem);
  letter-spacing: -0.025em;
}

h3 {
  font-size: 1rem;
}

.lead {
  max-width: 52rem;
  margin-top: 8px;
  color: var(--muted);
}

.screen-stack {
  position: relative;
  display: grid;
}

.screen {
  grid-area: 1 / 1;
  opacity: 0;
  pointer-events: none;
}

.screen.is-active {
  opacity: 1;
  pointer-events: auto;
}

.panel,
.timer-card,
.log-summary,
.calendar-day,
.subject-row,
.session-list li {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.panel,
.timer-card {
  padding: 22px;
}

.panel {
  max-width: 860px;
  margin: 0 auto;
}

.panel-copy {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.panel-copy .lead {
  max-width: 34rem;
}

.settings-form {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 18px;
  align-items: end;
}

.settings-form label,
.log-controls label,
.subject-create label,
.panel-form label {
  display: grid;
  gap: 6px;
}

.settings-form label span,
.log-controls label span,
.subject-create label span,
.panel-form label span {
  font-weight: 600;
}

.settings-form label small,
.panel-form label small {
  color: var(--muted);
}

.settings-form .is-wide,
.settings-form .form-message,
.settings-form .settings-note,
.settings-form .actions {
  grid-column: 1 / -1;
}

input,
select {
  width: 100%;
  min-height: 42px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--surface);
  color: var(--text);
  padding: 0 10px;
}

input:focus-visible,
select:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.settings-form > label.is-wide select {
  min-height: 48px;
  border-color: var(--accent);
  background: var(--surface);
}

.form-message {
  color: var(--break);
  min-height: 1.4em;
}

.settings-note {
  margin: 0;
  color: var(--muted);
}

.panel-form {
  display: grid;
  gap: 14px;
  margin-top: 22px;
}

.panel-form .actions {
  justify-content: flex-end;
  margin-top: 4px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
}

.timer-status {
  display: grid;
  gap: 6px;
  justify-items: end;
}

.subject-pill {
  display: inline-flex;
  width: fit-content;
  padding: 3px 8px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface-2);
  color: var(--text);
  font-size: 0.84rem;
}

.cycle,
.timer-metadata,
.session-list time,
.calendar-day span,
.log-section-header p {
  color: var(--muted);
  font-size: 0.84rem;
}

.timer {
  margin-top: 28px;
  font-family: "IBM Plex Mono", Consolas, monospace;
  font-size: clamp(4rem, 12vw, 7.5rem);
  font-weight: 500;
  line-height: 0.95;
  letter-spacing: -0.08em;
}

.progress {
  height: 8px;
  margin-top: 24px;
  overflow: hidden;
  border-radius: 999px;
  background: #e7e3da;
}

.progress span {
  display: block;
  width: 0%;
  height: 100%;
  background: var(--accent);
  transition: width 160ms linear;
}

.timer-card.is-break .progress span {
  background: var(--break);
}

.message {
  margin-top: 14px;
  color: var(--muted);
}

.timer-metadata {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 14px;
}

.timer-metadata span {
  padding-right: 12px;
  border-right: 1px solid var(--line);
}

.timer-metadata span:last-child {
  border-right: 0;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.settings-form .actions {
  justify-content: flex-end;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.button,
.ghost-button,
.delete-session {
  min-height: 38px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
}

.button,
.ghost-button {
  padding: 0 12px;
}

.button:hover,
.ghost-button:hover,
.delete-session:hover {
  background: var(--surface-2);
}

.button-primary {
  border-color: var(--accent);
  background: var(--accent);
  color: #ffffff;
}

.button-primary:hover {
  background: #275a62;
}

.timer-card.is-break .button-primary {
  border-color: var(--break);
  background: var(--break);
}

.delete-session {
  min-height: 32px;
  padding: 0 10px;
  border-color: #d0a297;
  color: var(--danger);
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 18px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.stat {
  min-height: 86px;
  padding: 16px;
  border-right: 1px solid var(--line);
}

.stat:last-child {
  border-right: 0;
}

.stat strong,
.log-summary strong {
  display: block;
  margin-top: 8px;
  font-family: "IBM Plex Mono", Consolas, monospace;
  font-size: 1.25rem;
  font-weight: 600;
}

.log-drawer {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: none;
}

.log-drawer.is-open {
  display: block;
}

.log-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(30, 31, 32, 0.32);
}

.log-panel {
  position: absolute;
  top: 0;
  right: 0;
  width: min(100%, 620px);
  height: 100%;
  overflow: auto;
  padding: 24px;
  border-left: 1px solid var(--line);
  background: var(--surface);
}

.subject-panel {
  width: min(100%, 560px);
}

.log-header,
.log-section-header,
.session-row,
.subject-manager-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
}

.log-panel .lead {
  margin-top: 10px;
}

.subject-manager {
  display: grid;
  gap: 16px;
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.subject-help {
  color: var(--muted);
  font-size: 0.86rem;
}

.subject-create {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 130px 82px;
  gap: 10px;
  align-items: end;
}

.subject-panel .subject-note-field {
  grid-column: 1 / 3;
}

.subject-panel .subject-create .button {
  grid-column: 3;
  min-height: 42px;
}

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

.subject-card,
.calendar-subject {
  --subject-color: var(--accent);
  border: 1px solid var(--line);
  background: var(--surface);
}

.subject-card {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  padding: 12px;
  border-radius: 8px;
}

.subject-card strong,
.subject-card small {
  display: block;
}

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

.subject-chip-icon,
.calendar-subject-icon,
.session-subject-icon {
  display: inline-grid;
  place-items: center;
  min-width: 24px;
  height: 24px;
  border-radius: 6px;
  background: var(--subject-color);
  color: #ffffff;
  font-size: 0.72rem;
  font-weight: 700;
}

.subject-card button {
  min-height: 32px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--surface);
  cursor: pointer;
}

.log-controls {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr) minmax(0, 1fr);
  gap: 12px;
  margin-top: 22px;
}

.period-tabs {
  display: flex;
  gap: 8px;
  align-items: end;
}

.period-tabs .ghost-button.is-active {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.log-summary {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  margin-top: 22px;
  overflow: hidden;
}

.log-summary article {
  padding: 14px;
  border-right: 1px solid var(--line);
}

.log-summary article:last-child {
  border-right: 0;
}

.log-summary span {
  color: var(--muted);
  font-size: 0.86rem;
}

.log-section {
  margin-top: 26px;
}

.log-section-header {
  align-items: baseline;
  margin-bottom: 12px;
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 8px;
}

.calendar-grid.is-day {
  grid-template-columns: 1fr;
}

.calendar-day,
.calendar-gap {
  min-height: 92px;
  padding: 10px;
}

.calendar-gap {
  opacity: 0.4;
}

.calendar-day.is-today {
  border-color: var(--accent);
}

.calendar-day strong,
.calendar-day span {
  display: block;
}

.calendar-day .calendar-total {
  margin-top: 8px;
  color: var(--accent);
}

.calendar-subject {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  width: fit-content;
  margin-top: 5px;
  padding: 3px 6px;
  border-radius: 6px;
}

.subject-breakdown {
  display: grid;
  gap: 10px;
}

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

.subject-meter {
  height: 6px;
  margin-top: 8px;
  overflow: hidden;
  border-radius: 999px;
  background: #e7e3da;
}

.subject-meter span {
  display: block;
  width: 0%;
  height: 100%;
  background: var(--accent);
}

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

.session-list li {
  padding: 14px;
}

.session-list strong,
.session-list span,
.session-list time {
  display: block;
}

.session-list span {
  margin-top: 4px;
  color: var(--muted);
}

.session-subject {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

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

.auth-layer {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: grid;
  place-items: center;
  padding: 24px;
  background: var(--bg);
}

.auth-layer[hidden] {
  display: none;
}

.auth-card {
  display: grid;
  width: min(100%, 420px);
  gap: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 24px;
  background: var(--surface);
}

.auth-card label {
  display: grid;
  gap: 6px;
}

.auth-card label span {
  font-weight: 600;
}

@media (max-width: 860px) {
  .hero,
  .panel-copy,
  .card-top,
  .log-header,
  .log-section-header,
  .subject-manager-header,
  .session-row {
    display: grid;
    grid-template-columns: 1fr;
  }

  .settings-form,
  .stats,
  .log-controls,
  .log-summary,
  .subject-create {
    grid-template-columns: 1fr;
  }

  .stat,
  .log-summary article {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .stat:last-child,
  .log-summary article:last-child {
    border-bottom: 0;
  }

  .subject-panel .subject-note-field,
  .subject-panel .subject-create .button {
    grid-column: auto;
  }
}

@media (max-width: 620px) {
  .site-header,
  .page {
    width: min(calc(100% - 24px), 1040px);
  }

  .site-header,
  .header-actions,
  .period-tabs,
  .timer-metadata,
  .actions {
    flex-direction: column;
    align-items: stretch;
  }

  .button,
  .ghost-button {
    justify-content: center;
    width: 100%;
  }

  .timer-status {
    justify-items: start;
  }

  .panel,
  .timer-card,
  .log-panel {
    padding: 18px;
  }

  .calendar-grid {
    grid-template-columns: 1fr;
  }

  .calendar-gap {
    display: none;
  }
}