:root {
  color-scheme: dark;
  --night: #0b1220;
  --night-soft: #111b2e;
  --panel: #17233a;
  --panel-strong: #1b2942;
  --line: #2e3d58;
  --line-soft: rgba(156, 171, 193, 0.18);
  --ink: #f7f0df;
  --muted: #aeb9c8;
  --faint: #76869d;
  --amber: #f1ba5c;
  --amber-light: #ffda8a;
  --amber-deep: #c8862d;
  --desk: #704b35;
  --desk-dark: #3a251d;
  --paper: #f5edda;
  --blue: #6ea6d9;
  --green: #72aa82;
  --rose: #cb7a7a;
  --violet: #9a83c9;
  --slate: #8090a6;
  --radius: 22px;
  --radius-small: 14px;
  --shadow: 0 24px 70px rgba(2, 7, 16, 0.3);
  font-family: Inter, "Hiragino Sans", "Yu Gothic UI", "Yu Gothic", Meiryo, system-ui, sans-serif;
  font-synthesis: none;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--night);
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background:
    radial-gradient(circle at 77% 7%, rgba(241, 186, 92, 0.075), transparent 27rem),
    linear-gradient(180deg, #0c1424 0%, var(--night) 38%, #0a111e 100%);
}

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  color: inherit;
}

a {
  color: inherit;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 3px solid rgba(255, 218, 138, 0.95);
  outline-offset: 3px;
}

[hidden] {
  display: none !important;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 10px 16px;
  color: var(--night);
  background: var(--amber-light);
  border-radius: 10px;
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header,
main,
footer {
  width: min(1180px, calc(100% - 40px));
  margin-inline: auto;
}

.site-header {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid var(--line-soft);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 16px;
  font-weight: 760;
  letter-spacing: 0.04em;
  text-decoration: none;
}

.brand-lamp {
  position: relative;
  width: 28px;
  height: 28px;
  display: inline-block;
}

.brand-lamp::before {
  position: absolute;
  top: 2px;
  left: 7px;
  width: 14px;
  height: 10px;
  content: "";
  background: var(--amber);
  border-radius: 10px 10px 3px 3px;
  box-shadow: 0 0 18px rgba(241, 186, 92, 0.7);
}

.brand-lamp::after {
  position: absolute;
  right: 4px;
  bottom: 3px;
  width: 15px;
  height: 3px;
  content: "";
  background: var(--muted);
  border-radius: 99px;
}

.brand-lamp i {
  position: absolute;
  top: 10px;
  left: 13px;
  width: 3px;
  height: 13px;
  display: block;
  background: var(--muted);
  border-radius: 99px;
  transform: rotate(-28deg);
  transform-origin: top;
}

.site-header nav {
  display: flex;
  gap: 24px;
}

.site-header nav a {
  color: var(--muted);
  font-size: 13px;
  font-weight: 650;
  text-decoration: none;
}

.site-header nav a:hover {
  color: var(--amber-light);
}

main {
  padding: 44px 0 80px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--amber);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.17em;
  line-height: 1.3;
}

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

h1 {
  max-width: 18em;
  margin-bottom: 18px;
  font-size: clamp(26px, 3.1vw, 32px);
  line-height: 1.35;
  letter-spacing: -0.025em;
}

h2 {
  margin-bottom: 10px;
  font-size: clamp(22px, 2.5vw, 28px);
  line-height: 1.4;
}

h3 {
  margin: 0;
  font-size: 18px;
  line-height: 1.45;
}

.opening {
  min-height: 440px;
  display: grid;
  grid-template-columns: minmax(290px, 0.8fr) minmax(460px, 1.2fr);
  align-items: center;
  gap: clamp(38px, 7vw, 92px);
  padding: 34px 0 68px;
}

.opening-copy > p:not(.eyebrow) {
  max-width: 38em;
  margin-bottom: 22px;
  color: var(--muted);
  font-size: 15px;
}

.opening-points {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.opening-points li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 11px;
  color: #d7dee8;
  font-size: 12px;
  font-weight: 650;
  background: rgba(23, 35, 58, 0.72);
  border: 1px solid var(--line-soft);
  border-radius: 99px;
}

.point-lamp,
.point-book,
.point-sheet {
  position: relative;
  width: 13px;
  height: 13px;
  display: block;
}

.point-lamp {
  background: var(--amber);
  border-radius: 50%;
  box-shadow: 0 0 10px rgba(241, 186, 92, 0.65);
}

.point-book {
  background: var(--green);
  border-left: 3px solid #477758;
  border-radius: 2px;
}

.point-sheet {
  background:
    linear-gradient(var(--blue), var(--blue)) 3px 4px / 7px 1px no-repeat,
    linear-gradient(var(--blue), var(--blue)) 3px 7px / 7px 1px no-repeat,
    rgba(110, 166, 217, 0.18);
  border: 1px solid var(--blue);
  border-radius: 2px;
}

.desk-scene {
  position: relative;
  min-height: 350px;
  overflow: hidden;
  background: #121e32;
  border: 1px solid rgba(156, 171, 193, 0.18);
  border-radius: 30px 30px 14px 14px;
  box-shadow: var(--shadow);
}

.scene-wall {
  position: absolute;
  inset: 0 0 30%;
  background:
    linear-gradient(90deg, transparent 49.8%, rgba(255, 255, 255, 0.018) 50%),
    linear-gradient(#142139, #111c2f);
}

.scene-window {
  position: absolute;
  top: 38px;
  right: 42px;
  width: 138px;
  height: 112px;
  overflow: hidden;
  background:
    radial-gradient(circle at 76% 62%, rgba(255, 255, 255, 0.45) 0 1px, transparent 2px),
    radial-gradient(circle at 23% 25%, rgba(255, 255, 255, 0.5) 0 1px, transparent 2px), #081120;
  border: 9px solid #2a3850;
  box-shadow: inset 0 0 22px #020711;
}

.scene-window i {
  position: absolute;
  background: #2a3850;
}

.scene-window i:first-child {
  top: 0;
  bottom: 0;
  left: calc(50% - 3px);
  width: 6px;
}

.scene-window i:nth-child(2) {
  top: calc(50% - 3px);
  right: 0;
  left: 0;
  height: 6px;
}

.moon {
  position: absolute;
  top: 17px;
  left: 18px;
  width: 27px;
  height: 27px;
  background: #f3d78e;
  border-radius: 50%;
  box-shadow: 0 0 22px rgba(243, 215, 142, 0.35);
}

.lamp-halo {
  position: absolute;
  z-index: 1;
  right: 27%;
  bottom: -46px;
  width: 260px;
  height: 240px;
  background: radial-gradient(ellipse at 50% 35%, rgba(255, 203, 107, 0.26), transparent 68%);
}

.desk-lamp {
  position: absolute;
  z-index: 3;
  right: 32%;
  bottom: -38px;
  width: 112px;
  height: 190px;
}

.lamp-shade {
  position: absolute;
  top: 8px;
  right: 5px;
  width: 66px;
  height: 42px;
  background: #e2a947;
  border-bottom: 8px solid #ffd784;
  border-radius: 44px 44px 10px 10px;
  box-shadow: 0 9px 22px rgba(241, 186, 92, 0.35);
  transform: rotate(22deg);
}

.lamp-neck {
  position: absolute;
  top: 42px;
  right: 49px;
  width: 8px;
  height: 116px;
  background: #718097;
  border-radius: 99px;
  transform: rotate(-22deg);
  transform-origin: top;
}

.lamp-base {
  position: absolute;
  right: 30px;
  bottom: 19px;
  width: 78px;
  height: 15px;
  background: #536279;
  border-radius: 50% 50% 10px 10px;
}

.scene-desk {
  position: absolute;
  z-index: 2;
  right: 0;
  bottom: 0;
  left: 0;
  height: 31%;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.04), transparent 20% 70%, rgba(0, 0, 0, 0.08)),
    repeating-linear-gradient(5deg, transparent 0 21px, rgba(48, 26, 16, 0.1) 22px 23px),
    linear-gradient(#825a3e, #5d3c2c);
  border-top: 7px solid #9a704f;
  box-shadow: 0 -12px 30px rgba(2, 7, 16, 0.22);
}

.scene-books {
  position: absolute;
  bottom: 24px;
  left: 38px;
  width: 128px;
  height: 85px;
}

.scene-books span {
  position: absolute;
  bottom: 0;
  width: 33px;
  border-radius: 3px 5px 2px 2px;
  box-shadow: inset -5px 0 rgba(0, 0, 0, 0.12);
}

.scene-books span:nth-child(1) {
  left: 4px;
  height: 70px;
  background: var(--rose);
  transform: rotate(-5deg);
}

.scene-books span:nth-child(2) {
  left: 43px;
  height: 82px;
  background: var(--blue);
}

.scene-books span:nth-child(3) {
  left: 82px;
  height: 61px;
  background: var(--green);
  transform: rotate(4deg);
}

.scene-notebook {
  position: absolute;
  right: 34px;
  bottom: 15px;
  width: 132px;
  height: 76px;
  background: repeating-linear-gradient(#f7f0df 0 13px, #d7d0be 14px 15px), var(--paper);
  border-left: 10px solid #25334a;
  border-radius: 3px 10px 10px 3px;
  box-shadow: 0 11px 18px rgba(25, 13, 8, 0.25);
  transform: skewY(-4deg);
}

.scene-notebook i {
  position: absolute;
  left: 18px;
  width: 58%;
  height: 2px;
  background: #b98f5b;
}

.scene-notebook i:nth-child(1) {
  top: 18px;
}

.scene-notebook i:nth-child(2) {
  top: 34px;
}

.scene-notebook i:nth-child(3) {
  top: 50px;
}

.scene-clock {
  position: absolute;
  bottom: 28px;
  left: 43%;
  width: 74px;
  height: 55px;
  background: #26344b;
  border: 4px solid #56667e;
  border-radius: 13px;
  box-shadow: 0 8px 18px rgba(25, 13, 8, 0.22);
}

.scene-clock::before {
  position: absolute;
  top: 15px;
  left: 14px;
  content: "25:00";
  color: var(--amber-light);
  font:
    700 14px ui-monospace,
    monospace;
  letter-spacing: 0.06em;
}

.empty-desk {
  display: grid;
  grid-template-columns: minmax(280px, 0.7fr) minmax(340px, 1fr);
  gap: clamp(36px, 7vw, 90px);
  align-items: center;
  margin: 18px 0 80px;
  padding: clamp(28px, 5vw, 60px);
  background: linear-gradient(135deg, rgba(23, 35, 58, 0.95), rgba(15, 25, 42, 0.95));
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.empty-visual {
  position: relative;
  min-height: 270px;
}

.empty-light {
  position: absolute;
  top: 10%;
  left: 23%;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(241, 186, 92, 0.22), transparent 68%);
}

.empty-lamp {
  position: absolute;
  top: 28px;
  left: calc(50% - 45px);
  width: 74px;
  height: 55px;
  background: var(--amber);
  border-bottom: 10px solid var(--amber-light);
  border-radius: 50px 50px 10px 10px;
  box-shadow: 0 16px 25px rgba(241, 186, 92, 0.3);
  transform: rotate(16deg);
}

.empty-lamp::after {
  position: absolute;
  top: 48px;
  left: 17px;
  width: 8px;
  height: 136px;
  content: "";
  background: var(--slate);
  border-radius: 99px;
  transform: rotate(-23deg);
  transform-origin: top;
}

.empty-table {
  position: absolute;
  right: 0;
  bottom: 18px;
  left: 0;
  height: 48px;
  background:
    repeating-linear-gradient(3deg, transparent 0 23px, rgba(38, 20, 13, 0.16) 24px 25px),
    var(--desk);
  border-top: 6px solid #946a4a;
  border-radius: 5px;
}

.empty-copy > p:not(.eyebrow) {
  color: var(--muted);
  font-size: 14px;
}

form {
  display: grid;
  gap: 15px;
}

label {
  display: grid;
  gap: 7px;
  color: #d9e0e9;
  font-size: 12px;
  font-weight: 700;
}

input,
select,
textarea {
  width: 100%;
  min-height: 44px;
  padding: 10px 12px;
  color: var(--ink);
  background: #0e1829;
  border: 1px solid #354660;
  border-radius: 10px;
}

input::placeholder,
textarea::placeholder {
  color: #687b94;
}

textarea {
  min-height: 86px;
  resize: vertical;
}

.field-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.input-suffix {
  display: flex;
  align-items: center;
  overflow: hidden;
  background: #0e1829;
  border: 1px solid #354660;
  border-radius: 10px;
}

.input-suffix input {
  border: 0;
}

.input-suffix > span {
  padding: 0 12px 0 4px;
  color: var(--faint);
}

.focus-field {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin: 0;
  padding: 0;
  border: 0;
}

.focus-field legend {
  grid-column: 1 / -1;
  margin-bottom: 6px;
  color: #d9e0e9;
  font-size: 12px;
  font-weight: 700;
}

.focus-field label {
  cursor: pointer;
}

.focus-field input {
  position: absolute;
  opacity: 0;
}

.focus-field span {
  padding: 10px;
  color: var(--muted);
  text-align: center;
  background: #0e1829;
  border: 1px solid #354660;
  border-radius: 10px;
}

.focus-field input:checked + span {
  color: #251707;
  background: var(--amber);
  border-color: var(--amber-light);
}

.primary-button,
.quiet-button,
.text-button,
.book-edit,
.session-delete,
.target-stat button {
  cursor: pointer;
}

.primary-button,
.quiet-button {
  min-height: 44px;
  padding: 10px 16px;
  font-size: 13px;
  font-weight: 760;
  border-radius: 11px;
}

.primary-button {
  position: relative;
  overflow: hidden;
  color: #251707;
  background: linear-gradient(180deg, var(--amber-light), var(--amber));
  border: 1px solid #ffd98d;
  box-shadow: 0 9px 24px rgba(200, 134, 45, 0.18);
}

.primary-button:hover {
  background: #ffcf76;
}

.primary-button:disabled,
.quiet-button:disabled {
  cursor: not-allowed;
  opacity: 0.42;
}

.primary-button.small {
  min-height: 38px;
  padding: 7px 13px;
}

.primary-button.inline {
  width: fit-content;
  display: inline-flex;
  align-items: center;
  margin-top: 22px;
  text-decoration: none;
}

.button-glow {
  position: absolute;
  top: -35px;
  left: 15%;
  width: 70%;
  height: 48px;
  background: rgba(255, 255, 255, 0.35);
  border-radius: 50%;
  filter: blur(13px);
}

.quiet-button {
  color: #dae1eb;
  background: #17243a;
  border: 1px solid #3c4b64;
}

.quiet-button:hover {
  background: #1c2c47;
  border-color: #5a6b84;
}

.text-button {
  padding: 6px 4px;
  color: var(--amber-light);
  font-size: 12px;
  font-weight: 700;
  background: transparent;
  border: 0;
}

.form-state {
  min-height: 1.4em;
  margin: 0;
  color: var(--rose);
  font-size: 12px;
}

.study-room {
  margin: 6px 0 84px;
}

.room-header,
.timer-desk > header,
.bookcase > header,
.week-shelf > header,
.balance-board > header,
.session-ledger > header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.room-header {
  margin-bottom: 20px;
}

.header-actions,
.timer-actions,
.review-actions,
.ledger-filters {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 9px;
}

.room-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  overflow: hidden;
  margin-bottom: 16px;
  background: rgba(23, 35, 58, 0.72);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-small);
}

.room-stats article {
  min-width: 0;
  padding: 18px 20px;
  border-right: 1px solid var(--line-soft);
}

.room-stats article:last-child {
  border-right: 0;
}

.room-stats span,
.room-stats small {
  display: block;
  color: var(--faint);
  font-size: 11px;
}

.room-stats strong {
  display: block;
  margin: 2px 0;
  overflow: hidden;
  color: var(--ink);
  font-size: 21px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.target-stat button {
  padding: 0;
  color: var(--amber);
  font-size: 11px;
  font-weight: 700;
  background: none;
  border: 0;
}

.desk-grid,
.review-grid {
  display: grid;
  gap: 16px;
}

.desk-grid {
  grid-template-columns: minmax(0, 1.15fr) minmax(310px, 0.85fr);
}

.review-grid {
  grid-template-columns: minmax(0, 1.45fr) minmax(280px, 0.55fr);
  margin-top: 16px;
}

.timer-desk,
.bookcase,
.week-shelf,
.balance-board,
.session-ledger {
  background: linear-gradient(150deg, rgba(24, 37, 60, 0.96), rgba(15, 25, 42, 0.98));
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  box-shadow: 0 16px 50px rgba(2, 7, 16, 0.16);
}

.timer-desk,
.bookcase {
  min-height: 470px;
  padding: 24px;
}

.timer-status {
  padding: 5px 9px;
  color: var(--amber-light);
  font-size: 11px;
  font-weight: 760;
  background: rgba(241, 186, 92, 0.1);
  border: 1px solid rgba(241, 186, 92, 0.22);
  border-radius: 99px;
}

.timer-material-label {
  max-width: 360px;
  margin: 20px auto 0;
}

.timer-face {
  position: relative;
  width: 220px;
  height: 220px;
  display: grid;
  place-items: center;
  margin: 18px auto;
}

.timer-face::after {
  position: absolute;
  width: 135px;
  height: 135px;
  content: "";
  background: radial-gradient(circle, rgba(241, 186, 92, 0.1), transparent 70%);
  border-radius: 50%;
  transition: 300ms ease;
}

.timer-face[data-running="true"]::after {
  width: 185px;
  height: 185px;
  background: radial-gradient(circle, rgba(241, 186, 92, 0.2), transparent 70%);
}

.timer-face svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.timer-track,
.timer-progress {
  fill: none;
  stroke-width: 5;
}

.timer-track {
  stroke: #2a3953;
}

.timer-progress {
  stroke: var(--amber);
  stroke-linecap: round;
  filter: drop-shadow(0 0 7px rgba(241, 186, 92, 0.55));
  transition: stroke-dashoffset 0.5s linear;
}

.timer-face > div {
  z-index: 1;
  display: grid;
  justify-items: center;
}

.timer-face strong {
  font:
    750 34px/1.1 ui-monospace,
    "Cascadia Mono",
    monospace;
  letter-spacing: -0.03em;
}

.timer-face span {
  margin-top: 8px;
  color: var(--faint);
  font-size: 11px;
}

.timer-modes {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 7px;
  max-width: 400px;
  margin: 0 auto 16px;
}

.timer-modes button {
  min-height: 36px;
  cursor: pointer;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  background: #101b2e;
  border: 1px solid #32435d;
  border-radius: 9px;
}

.timer-modes button[aria-pressed="true"] {
  color: #2d1d09;
  background: var(--amber);
  border-color: var(--amber-light);
}

.timer-actions {
  justify-content: center;
}

.timer-note {
  max-width: 480px;
  margin: 16px auto 0;
  color: var(--faint);
  font-size: 11px;
  text-align: center;
}

.bookcase {
  position: relative;
  overflow: hidden;
}

.bookcase::after {
  position: absolute;
  right: 20px;
  bottom: 16px;
  left: 20px;
  height: 11px;
  content: "";
  background: linear-gradient(#906348, #523322);
  border-top: 3px solid #a87a58;
  border-radius: 3px;
  box-shadow: 0 8px 14px rgba(2, 7, 16, 0.35);
}

.bookcase > header > span,
.week-shelf > header > span,
.balance-board > header > span {
  color: var(--faint);
  font-size: 11px;
}

.book-list {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 8px;
  margin: 18px 0 22px;
}

.book-row {
  --book-color: var(--amber);
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  background: rgba(10, 18, 32, 0.62);
  border: 1px solid transparent;
  border-radius: 10px;
}

[data-color="blue"] {
  --book-color: var(--blue);
}

[data-color="green"] {
  --book-color: var(--green);
}

[data-color="rose"] {
  --book-color: var(--rose);
}

[data-color="violet"] {
  --book-color: var(--violet);
}

[data-color="slate"] {
  --book-color: var(--slate);
}

.book-row[data-active="true"] {
  background: rgba(241, 186, 92, 0.06);
  border-color: rgba(241, 186, 92, 0.28);
}

.book-select {
  min-width: 0;
  display: grid;
  grid-template-columns: 19px minmax(0, 1fr);
  gap: 12px;
  align-items: stretch;
  padding: 10px;
  cursor: pointer;
  color: inherit;
  text-align: left;
  background: none;
  border: 0;
}

.book-spine {
  position: relative;
  min-height: 54px;
  background: var(--book-color);
  border-left: 5px solid color-mix(in srgb, var(--book-color), #111 30%);
  border-radius: 2px 5px 5px 2px;
  box-shadow: 3px 3px 7px rgba(0, 0, 0, 0.2);
}

.book-spine i {
  position: absolute;
  top: 10px;
  right: 3px;
  left: 3px;
  height: 2px;
  background: rgba(255, 255, 255, 0.45);
}

.book-copy {
  min-width: 0;
  display: grid;
  align-content: center;
}

.book-copy strong,
.book-copy small {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.book-copy strong {
  font-size: 13px;
}

.book-copy small {
  color: var(--faint);
  font-size: 10px;
}

.book-meter {
  height: 3px;
  display: block;
  overflow: hidden;
  margin-top: 6px;
  background: #26364f;
  border-radius: 99px;
}

.book-meter i {
  height: 100%;
  display: block;
  background: var(--book-color);
  border-radius: 99px;
}

.book-edit {
  margin-right: 10px;
  padding: 6px;
  color: var(--faint);
  font-size: 10px;
  background: none;
  border: 0;
}

.week-shelf,
.balance-board,
.session-ledger {
  padding: 22px;
}

.week-columns {
  height: 225px;
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 8px;
  align-items: end;
  margin-top: 18px;
  padding: 14px 10px 0;
  background:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px) 0 0 / 100% 25%,
    rgba(10, 18, 32, 0.34);
  border-bottom: 10px solid var(--desk);
  border-radius: 10px 10px 3px 3px;
}

.week-column {
  height: 100%;
  display: grid;
  grid-template-rows: 27px minmax(60px, 1fr) 21px 18px;
  align-items: end;
  justify-items: center;
}

.week-column > strong {
  color: var(--muted);
  font-size: 9px;
  white-space: nowrap;
}

.week-column > span,
.week-column > small {
  color: var(--faint);
  font-size: 10px;
}

.week-column[data-today="true"] > span {
  color: var(--amber-light);
  font-weight: 800;
}

.day-bar-well {
  width: min(30px, 66%);
  height: 100%;
  display: flex;
  align-items: end;
  overflow: hidden;
  background: rgba(47, 63, 88, 0.42);
  border-radius: 7px 7px 2px 2px;
}

.day-bar {
  width: 100%;
  min-height: 2px;
  display: block;
  background: linear-gradient(180deg, var(--amber-light), var(--amber-deep));
  border-radius: 7px 7px 2px 2px;
  box-shadow: 0 -4px 14px rgba(241, 186, 92, 0.24);
}

.balance-list {
  display: grid;
  gap: 16px;
  margin-top: 22px;
}

.balance-label {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 6px;
  font-size: 11px;
}

.balance-label strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.balance-label span {
  color: var(--faint);
}

.balance-meter {
  height: 8px;
  overflow: hidden;
  background: #101b2e;
  border: 1px solid rgba(156, 171, 193, 0.12);
  border-radius: 99px;
}

.balance-meter span {
  height: 100%;
  display: block;
  background: var(--book-color);
  border-radius: 99px;
  box-shadow: 0 0 12px color-mix(in srgb, var(--book-color), transparent 55%);
}

.session-ledger {
  margin-top: 16px;
}

.ledger-filters select {
  min-height: 36px;
  padding-block: 6px;
  font-size: 11px;
}

.session-list {
  position: relative;
  display: grid;
  margin-top: 17px;
}

.session-list::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 71px;
  width: 1px;
  content: "";
  background: var(--line);
}

.session-row {
  --book-color: var(--amber);
  position: relative;
  display: grid;
  grid-template-columns: 56px 12px minmax(0, 1fr) auto;
  gap: 14px;
  align-items: start;
  padding: 13px 0;
  border-bottom: 1px solid rgba(156, 171, 193, 0.1);
}

.session-stamp {
  display: grid;
  color: var(--muted);
  text-align: right;
}

.session-stamp strong {
  font-size: 11px;
}

.session-stamp span {
  color: var(--faint);
  font-size: 9px;
}

.session-marker {
  position: relative;
  z-index: 1;
  width: 11px;
  height: 11px;
  margin-top: 5px;
  background: var(--book-color);
  border: 3px solid var(--night-soft);
  border-radius: 50%;
  box-shadow:
    0 0 0 1px var(--book-color),
    0 0 11px color-mix(in srgb, var(--book-color), transparent 40%);
}

.session-copy {
  min-width: 0;
}

.session-title {
  display: flex;
  justify-content: space-between;
  gap: 14px;
}

.session-title strong {
  overflow: hidden;
  font-size: 12px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.session-title span {
  flex: none;
  color: var(--amber-light);
  font-size: 12px;
  font-weight: 760;
}

.session-copy small {
  color: var(--faint);
  font-size: 10px;
}

.session-copy p {
  margin: 5px 0 0;
  color: var(--muted);
  font-size: 11px;
  overflow-wrap: anywhere;
}

.session-delete {
  padding: 4px;
  color: #7e8da2;
  font-size: 9px;
  background: none;
  border: 0;
}

.session-delete:hover {
  color: #ef9999;
}

.session-empty {
  padding: 25px 0 7px;
  color: var(--faint);
  font-size: 12px;
  text-align: center;
}

.local-flow {
  display: grid;
  grid-template-columns: 1fr 0.8fr;
  gap: 55px;
  align-items: center;
  margin-top: 60px;
  padding: 38px;
  background: rgba(15, 25, 42, 0.72);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
}

.flow-copy p:not(.eyebrow) {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 13px;
}

.flow-visual {
  position: relative;
  height: 145px;
}

.flow-browser {
  position: absolute;
  top: 12px;
  left: 0;
  width: 165px;
  height: 112px;
  background: #182640;
  border: 5px solid #40516b;
  border-radius: 10px;
  box-shadow: 0 15px 30px rgba(2, 7, 16, 0.25);
}

.flow-browser::before {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 21px;
  content: "";
  background: #2d3d57;
}

.flow-browser i {
  position: absolute;
  bottom: 17px;
  width: 22px;
  background: var(--amber);
  border-radius: 4px 4px 1px 1px;
}

.flow-browser i:nth-child(1) {
  left: 27px;
  height: 31px;
}

.flow-browser i:nth-child(2) {
  left: 66px;
  height: 52px;
}

.flow-browser i:nth-child(3) {
  left: 105px;
  height: 72px;
}

.flow-lock {
  position: absolute;
  z-index: 2;
  top: 45px;
  left: 151px;
  width: 48px;
  height: 44px;
  background: var(--amber);
  border-radius: 9px;
  box-shadow: 0 0 24px rgba(241, 186, 92, 0.32);
}

.flow-lock::before {
  position: absolute;
  top: -25px;
  left: 10px;
  width: 28px;
  height: 32px;
  content: "";
  border: 6px solid var(--amber);
  border-bottom: 0;
  border-radius: 20px 20px 0 0;
}

.flow-server {
  position: absolute;
  top: 24px;
  right: 0;
  width: 80px;
  height: 92px;
  opacity: 0.32;
  background:
    radial-gradient(circle, #8d9bb0 0 3px, transparent 4px) 12px 19px / 100% 27px repeat-y,
    repeating-linear-gradient(#52627a 0 2px, transparent 2px 27px),
    #26354e;
  border: 3px solid #5d6e86;
  border-radius: 8px;
}

.flow-server::after {
  position: absolute;
  top: 45px;
  left: -65px;
  width: 54px;
  height: 2px;
  content: "";
  background: repeating-linear-gradient(90deg, #78869a 0 5px, transparent 5px 10px);
}

dialog {
  width: min(560px, calc(100% - 30px));
  max-height: min(760px, calc(100vh - 30px));
  overflow: auto;
  padding: 24px;
  color: var(--ink);
  background: #111d31;
  border: 1px solid #3a4b65;
  border-radius: 18px;
  box-shadow: 0 35px 110px rgba(0, 0, 0, 0.55);
}

dialog::backdrop {
  background: rgba(3, 8, 17, 0.78);
  backdrop-filter: blur(5px);
}

.dialog-head {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 20px;
}

.dialog-head button {
  width: 38px;
  height: 38px;
  flex: none;
  cursor: pointer;
  color: var(--muted);
  font-size: 20px;
  background: #17253c;
  border: 1px solid #344660;
  border-radius: 50%;
}

.review-dialog {
  width: min(820px, calc(100% - 30px));
}

.review-summary {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 9px;
}

.review-summary article {
  padding: 14px;
  background: #0e1829;
  border: 1px solid var(--line-soft);
  border-radius: 11px;
}

.review-summary span,
.review-summary strong {
  display: block;
}

.review-summary span {
  color: var(--faint);
  font-size: 10px;
}

.review-summary strong {
  margin-top: 3px;
  font-size: 17px;
}

.heat-board {
  display: grid;
  grid-template-columns: repeat(28, 1fr);
  gap: 4px;
  margin: 22px 0;
}

.heat-cell {
  aspect-ratio: 1;
  background: #202e45;
  border-radius: 3px;
}

.heat-cell[data-level="1"] {
  background: #765b32;
}

.heat-cell[data-level="2"] {
  background: #ad7e36;
}

.heat-cell[data-level="3"] {
  background: #daa144;
}

.heat-cell[data-level="4"] {
  background: var(--amber-light);
  box-shadow: 0 0 7px rgba(241, 186, 92, 0.34);
}

.review-actions {
  padding-top: 4px;
  border-top: 1px solid var(--line-soft);
}

.share-option {
  display: flex;
  align-items: center;
  gap: 7px;
  margin-right: auto;
}

.share-option input {
  width: 17px;
  min-height: 17px;
}

.file-button {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.file-button input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.share-note {
  margin: 15px 0 0;
  color: var(--faint);
  font-size: 11px;
}

.text-page {
  min-height: calc(100vh - 170px);
  padding-top: 65px;
}

.text-page > header {
  max-width: 680px;
  margin-bottom: 38px;
}

.text-page > header p:not(.eyebrow) {
  color: var(--muted);
}

.guide-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: guide;
}

.guide-steps li {
  position: relative;
  padding: 25px 21px 23px;
  background: var(--night-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-small);
  counter-increment: guide;
}

.guide-steps li::before {
  display: grid;
  width: 31px;
  height: 31px;
  place-items: center;
  margin-bottom: 18px;
  content: counter(guide);
  color: #261704;
  font-size: 12px;
  font-weight: 800;
  background: var(--amber);
  border-radius: 50%;
}

.guide-steps h2 {
  font-size: 18px;
}

.guide-steps p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.guide-note,
.privacy-details {
  margin-top: 18px;
  padding: 23px;
  background: rgba(23, 35, 58, 0.7);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-small);
}

.guide-note {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
}

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

.note-lamp {
  width: 35px;
  height: 35px;
  display: block;
  background: var(--amber);
  border-radius: 50%;
  box-shadow: 0 0 22px rgba(241, 186, 92, 0.4);
}

.privacy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.privacy-grid article {
  padding: 24px;
  background: var(--night-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-small);
}

.privacy-grid h2 {
  margin-top: 16px;
  font-size: 18px;
}

.privacy-grid p,
.privacy-details p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 12px;
}

.privacy-icon {
  position: relative;
  width: 42px;
  height: 42px;
  display: block;
}

.privacy-icon.device {
  background: #293b58;
  border: 3px solid var(--blue);
  border-radius: 7px;
}

.privacy-icon.device::after {
  position: absolute;
  right: 6px;
  bottom: 4px;
  left: 6px;
  height: 2px;
  content: "";
  background: var(--blue);
}

.privacy-icon.signal::before,
.privacy-icon.signal::after {
  position: absolute;
  content: "";
  border: 3px solid var(--amber);
  border-radius: 50%;
}

.privacy-icon.signal::before {
  inset: 3px;
}

.privacy-icon.signal::after {
  inset: 12px;
  background: var(--amber);
}

.privacy-icon.signal {
  opacity: 0.7;
}

.privacy-icon.signal::before {
  border-top-color: transparent;
  border-right-color: transparent;
  transform: rotate(-45deg);
}

.privacy-icon.file {
  background:
    linear-gradient(var(--green), var(--green)) 10px 13px / 22px 2px no-repeat,
    linear-gradient(var(--green), var(--green)) 10px 21px / 22px 2px no-repeat,
    linear-gradient(var(--green), var(--green)) 10px 29px / 15px 2px no-repeat;
  border: 3px solid var(--green);
  border-radius: 5px;
}

.not-found {
  min-height: calc(100vh - 185px);
  display: grid;
  place-content: center;
  justify-items: center;
  text-align: center;
}

.lost-lamp {
  width: 58px;
  height: 58px;
  display: block;
  margin-bottom: 22px;
  background: rgba(241, 186, 92, 0.18);
  border: 3px solid var(--amber);
  border-radius: 50%;
  box-shadow: 0 0 35px rgba(241, 186, 92, 0.22);
}

.noscript {
  padding: 16px;
  color: var(--ink);
  text-align: center;
  background: #5d2f2f;
}

footer {
  min-height: 86px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  color: var(--faint);
  font-size: 11px;
  border-top: 1px solid var(--line-soft);
}

footer span:first-child {
  color: var(--muted);
  font-weight: 700;
}

@media (max-width: 900px) {
  .opening {
    grid-template-columns: 1fr;
    padding-top: 24px;
  }

  .opening-copy {
    max-width: 650px;
  }

  .desk-scene {
    min-height: 320px;
  }

  .empty-desk {
    grid-template-columns: 0.7fr 1fr;
    padding: 32px;
  }

  .desk-grid,
  .review-grid {
    grid-template-columns: 1fr;
  }

  .timer-desk,
  .bookcase {
    min-height: auto;
  }

  .room-stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .room-stats article:nth-child(2) {
    border-right: 0;
  }

  .room-stats article:nth-child(-n + 2) {
    border-bottom: 1px solid var(--line-soft);
  }

  .local-flow {
    grid-template-columns: 1fr;
  }

  .flow-visual {
    width: min(380px, 100%);
  }

  .guide-steps,
  .privacy-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .site-header,
  main,
  footer {
    width: min(100% - 24px, 1180px);
  }

  .site-header {
    min-height: 66px;
  }

  .site-header nav {
    gap: 14px;
  }

  main {
    padding-top: 28px;
  }

  h1 {
    font-size: 27px;
  }

  h2 {
    font-size: 22px;
  }

  .opening {
    min-height: auto;
    gap: 28px;
    padding: 12px 0 48px;
  }

  .opening-points {
    gap: 7px;
  }

  .opening-points li {
    padding: 6px 9px;
    font-size: 11px;
  }

  .desk-scene {
    min-height: 260px;
    border-radius: 20px 20px 10px 10px;
  }

  .scene-window {
    top: 25px;
    right: 22px;
    width: 106px;
    height: 88px;
  }

  .desk-lamp {
    right: 24%;
    transform: scale(0.83);
    transform-origin: bottom;
  }

  .scene-books {
    left: 18px;
    transform: scale(0.78);
    transform-origin: bottom left;
  }

  .scene-clock {
    left: 39%;
    transform: scale(0.78);
    transform-origin: bottom;
  }

  .scene-notebook {
    right: 10px;
    transform: scale(0.72) skewY(-4deg);
    transform-origin: bottom right;
  }

  .empty-desk {
    grid-template-columns: 1fr;
    gap: 20px;
    padding: 22px 16px;
  }

  .empty-visual {
    min-height: 190px;
  }

  .empty-lamp {
    top: 8px;
    transform: scale(0.75) rotate(16deg);
    transform-origin: top;
  }

  .field-pair {
    grid-template-columns: 1fr;
  }

  .room-header {
    align-items: start;
  }

  .header-actions {
    justify-content: flex-end;
  }

  .header-actions .quiet-button,
  .header-actions .primary-button {
    min-height: 36px;
    padding: 6px 9px;
    font-size: 11px;
  }

  .room-stats article {
    padding: 14px 12px;
  }

  .room-stats strong {
    font-size: 17px;
  }

  .timer-desk,
  .bookcase,
  .week-shelf,
  .balance-board,
  .session-ledger {
    padding: 18px 14px;
    border-radius: 16px;
  }

  .timer-face {
    width: 190px;
    height: 190px;
  }

  .timer-face strong {
    font-size: 29px;
  }

  .week-columns {
    gap: 4px;
    padding-inline: 4px;
  }

  .week-column > strong {
    font-size: 8px;
    writing-mode: vertical-rl;
  }

  .ledger-filters {
    justify-content: flex-end;
  }

  .ledger-filters select {
    width: 135px;
  }

  .session-row {
    grid-template-columns: 44px 10px minmax(0, 1fr);
    gap: 9px;
  }

  .session-list::before {
    left: 53px;
  }

  .session-delete {
    grid-column: 3;
    justify-self: end;
  }

  .local-flow {
    gap: 26px;
    margin-top: 38px;
    padding: 24px 17px;
  }

  .flow-visual {
    transform: scale(0.82);
    transform-origin: left center;
  }

  dialog {
    padding: 19px 16px;
  }

  .review-summary {
    grid-template-columns: repeat(2, 1fr);
  }

  .heat-board {
    grid-template-columns: repeat(14, 1fr);
  }

  .review-actions {
    align-items: stretch;
  }

  .review-actions > * {
    width: 100%;
    justify-content: center;
  }

  footer {
    flex-direction: column;
    align-items: start;
    justify-content: center;
    gap: 2px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

@media print {
  @page {
    size: A4 portrait;
    margin: 12mm;
  }

  :root {
    color-scheme: light;
  }

  body {
    color: #182033;
    background: white;
  }

  .site-header,
  .opening,
  .empty-desk,
  .header-actions,
  .timer-desk,
  .local-flow,
  footer,
  dialog,
  .session-delete,
  .ledger-filters {
    display: none !important;
  }

  main {
    width: 100%;
    padding: 0;
  }

  .study-room {
    display: block !important;
    margin: 0;
  }

  .room-header {
    margin-bottom: 8mm;
  }

  .room-header::after {
    content: "机の灯";
    color: #73501e;
    font-size: 11px;
    font-weight: 700;
  }

  .room-stats,
  .review-grid,
  .session-ledger,
  .week-shelf,
  .balance-board {
    color: #182033;
    background: white;
    border-color: #cbd1d9;
    box-shadow: none;
  }

  .room-stats strong,
  .week-shelf h3,
  .balance-board h3,
  .session-ledger h3,
  .session-title strong {
    color: #182033;
  }

  .review-grid {
    grid-template-columns: 1.4fr 0.6fr;
  }

  .week-columns {
    background: white;
    border-color: #7a563b;
  }

  .session-ledger {
    break-before: auto;
  }
}