:root {
  color-scheme: light;
  --bg: #f7f7f4;
  --surface: #ffffff;
  --surface-soft: #f3f3ef;
  --surface-muted: #ecebe6;
  --ink: #111111;
  --muted: #66625b;
  --line: #d8d4cb;
  --line-strong: #111111;
  --shadow: 0 6px 18px rgba(17, 17, 17, 0.04);
  --radius-xl: 18px;
  --radius-lg: 14px;
  --radius-md: 12px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

a {
  color: inherit;
  text-decoration: none;
}

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

button {
  cursor: pointer;
}

input,
select,
textarea {
  width: 100%;
}

textarea {
  min-height: 120px;
  resize: vertical;
}

[hidden] {
  display: none !important;
}

.site-shell {
  width: min(1280px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1.2rem 0 2rem;
}

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

.site-header {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1rem;
  align-items: center;
  padding: 1rem 1.2rem;
  margin-bottom: 1.5rem;
}

.header-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.65rem;
}

.auth-modal-open {
  overflow: hidden;
}

.auth-modal-overlay {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 1rem;
  background: rgba(17, 17, 17, 0.38);
  backdrop-filter: blur(10px);
  z-index: 1000;
}

.auth-modal {
  width: min(100%, 30rem);
  display: grid;
  gap: 1rem;
  padding: 1.35rem;
  border-radius: var(--radius-xl);
}

.auth-modal-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.auth-modal-head h2 {
  margin-top: 0.25rem;
  font-size: 1.55rem;
}

.auth-modal-close {
  width: 2.5rem;
  height: 2.5rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface-soft);
  color: var(--ink);
  font-size: 1.25rem;
  line-height: 1;
}

.auth-modal-actions {
  display: grid;
  gap: 0.75rem;
}

.auth-modal-actions .button {
  width: 100%;
}

.auth-modal .helper {
  margin: 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
}

.brand-mark {
  width: 3.15rem;
  height: 3.15rem;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 1rem;
  background: var(--line-strong);
  color: #ffffff;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.brand-copy {
  display: grid;
  gap: 0.1rem;
}

.brand-copy strong,
h1,
h2,
h3,
h4 {
  margin: 0;
  font-family: inherit;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.01em;
}

.brand-copy strong {
  font-size: 1rem;
}

.brand-kicker,
.eyebrow {
  color: var(--muted);
  text-transform: none;
  letter-spacing: 0.08em;
  font-size: 0.78rem;
  font-weight: 600;
}

.site-nav {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.site-nav a {
  padding: 0.6rem 0.9rem;
  border-radius: 999px;
  border: 1px solid transparent;
  color: var(--muted);
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.site-nav a:hover,
.site-nav a.is-active,
.site-nav a[aria-current="page"] {
  color: var(--ink);
  border-color: var(--line);
  background: var(--surface-soft);
}

.language-toggle {
  min-height: 2.9rem;
  padding: 0 1rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--ink);
  color: #ffffff;
  font-weight: 700;
}

.page-grid {
  display: grid;
  gap: 1.5rem;
}

.hero-grid,
.split-grid,
.room-page-grid {
  display: grid;
  gap: 1.5rem;
}

.card-head > div,
.card-code,
.room-hero > div,
.room-hero-actions,
.section-head > div,
.section-head .section-note {
  min-width: 0;
}

.auction-card,
.stat-card,
.stat-box,
.step-card,
.rule-card,
.room-notes-box,
.card-stat {
  min-width: 0;
}

.hero-panel h1,
.room-empty h1,
.card-head h3,
.card-head p,
.card-code strong,
.room-hero h1,
.stat-card strong,
.stat-box strong,
.step-card h3,
.rule-card,
.helper,
.section-note,
.badge,
.card-stat strong,
th,
td,
.room-notes-box p {
  overflow-wrap: anywhere;
  word-break: break-word;
  hyphens: auto;
}

.hero-grid {
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.85fr);
}

.split-grid {
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.9fr);
}

.split-grid.single-column {
  grid-template-columns: minmax(0, 1fr);
}

.hero-panel,
.summary-panel,
.form-panel,
.stack-panel,
.info-box,
.room-empty,
.room-shell,
.filter-panel {
  padding: 1.35rem;
}

.hero-panel,
.summary-panel,
.form-panel,
.stack-panel,
.info-box,
.room-empty,
.room-shell,
.filter-panel {
  display: grid;
  gap: 1.2rem;
}

.hero-panel h1,
.room-empty h1 {
  font-size: clamp(2.25rem, 4vw, 4.2rem);
  max-width: 12ch;
}

.home-page-grid .hero-panel h1 {
  font-size: clamp(2rem, 3vw, 2.8rem);
  max-width: 16ch;
}

.hero-panel .lede,
.room-empty .lede {
  max-width: 60ch;
  margin: 0;
  color: var(--muted);
  font-size: 1.02rem;
}

.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.95rem;
  padding: 0 1.1rem;
  border-radius: 10px;
  border: 1px solid var(--line-strong);
  background: var(--line-strong);
  color: #ffffff;
  font-weight: 700;
  transition: background 0.16s ease, color 0.16s ease, border-color 0.16s ease;
}

.button:hover {
  background: #2a2a2a;
}

.button-light,
.button-secondary,
.button-ghost {
  background: #ffffff;
  color: var(--ink);
  border-color: var(--line);
}

.button-light:hover,
.button-secondary:hover,
.button-ghost:hover {
  background: #efefeb;
}

.button-small {
  min-height: 2.6rem;
  padding: 0 0.95rem;
  font-size: 0.92rem;
}

.summary-grid,
.stat-grid,
.auction-grid,
.step-grid,
.rule-stack,
.stack-list {
  display: grid;
  gap: 0.85rem;
}

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

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

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

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

.stat-card,
.stat-box,
.step-card,
.rule-card,
.room-notes-box,
.card-stat,
.empty-list {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface-soft);
}

.clean-list {
  margin: 0;
  padding-left: 1.15rem;
  display: grid;
  gap: 0.7rem;
  color: var(--muted);
}

.clean-list li {
  overflow-wrap: anywhere;
  word-break: break-word;
}

.stat-card,
.stat-box,
.step-card,
.rule-card,
.room-notes-box,
.card-stat {
  padding: 1rem;
}

.stat-card span,
.stat-box span,
.card-stat span {
  display: block;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 600;
}

.stat-card strong,
.stat-box strong {
  display: block;
  margin-top: 0.4rem;
  font-family: inherit;
  font-size: 1.55rem;
}

.stat-card p,
.stat-box p,
.card-stat p,
.step-card p,
.rule-card,
.helper,
.section-note,
.room-empty p,
.info-box p {
  margin: 0;
  color: var(--muted);
}

.section-head {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: start;
}

.section-head.compact {
  margin-bottom: 0.2rem;
}

.section-head h2,
.section-head h3 {
  font-size: 1.5rem;
}

.section-head .section-note {
  max-width: 28ch;
  text-align: right;
}

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

.step-card span {
  display: inline-block;
  margin-bottom: 0.8rem;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.step-card h3 {
  font-size: 1.45rem;
  margin-bottom: 0.5rem;
}

.rule-stack {
  grid-template-columns: 1fr;
}

.rule-card {
  line-height: 1.55;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.95rem;
}

.drop-interval-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
}

.drop-interval-grid .field {
  gap: 0.35rem;
}

.drop-interval-grid input {
  min-height: 2.6rem;
  padding: 0.7rem 0.85rem;
}

.full-span {
  grid-column: 1 / -1;
}

.field {
  display: grid;
  gap: 0.45rem;
}

.field label {
  color: var(--muted);
  text-transform: none;
  letter-spacing: 0;
  font-size: 0.82rem;
  font-weight: 600;
}

input,
select,
textarea {
  min-height: 2.95rem;
  padding: 0.85rem 0.95rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #ffffff;
  color: var(--ink);
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

textarea {
  min-height: 128px;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--line-strong);
  box-shadow: 0 0 0 4px rgba(17, 17, 17, 0.08);
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  align-items: center;
}

.helper {
  font-size: 0.92rem;
}

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

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

.auction-grid.compact-grid {
  grid-template-columns: 1fr;
}

.auction-card {
  display: grid;
  gap: 1rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: #ffffff;
  box-shadow: 0 4px 10px rgba(17, 17, 17, 0.03);
}

.auction-card.compact {
  padding: 0.9rem;
}

.card-head {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: start;
}

.card-head h3 {
  margin-top: 0.45rem;
  font-size: 1.55rem;
}

.card-head p {
  margin: 0.3rem 0 0;
  color: var(--muted);
}

.card-code {
  text-align: right;
}

.card-code span {
  display: block;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 600;
}

.card-code strong {
  font-family: inherit;
  font-weight: 700;
  font-size: 1.25rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

.card-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.25rem;
  padding: 0 0.85rem;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--surface-soft);
  color: var(--muted);
  text-transform: none;
  letter-spacing: 0;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge.open {
  color: #1b5e20;
  border-color: rgba(27, 94, 32, 0.2);
  background: rgba(27, 94, 32, 0.06);
}

.badge.closed {
  color: #7f1d1d;
  border-color: rgba(127, 29, 29, 0.2);
  background: rgba(127, 29, 29, 0.06);
}

.empty-list {
  padding: 1rem;
}

.table-wrap {
  overflow-x: auto;
}

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

th,
td {
  padding: 0.9rem 0.75rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--muted);
  text-transform: none;
  letter-spacing: 0;
  font-size: 0.78rem;
  font-weight: 600;
}

.empty-row {
  padding: 1rem 0;
  color: var(--muted);
}

.room-shell {
  display: grid;
  gap: 1.4rem;
}

.room-hero {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: start;
}

.room-hero h1 {
  font-size: clamp(2rem, 4vw, 3.6rem);
  margin-top: 0.4rem;
}

.room-hero-actions {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.6rem;
}

.room-empty {
  display: grid;
  gap: 1.1rem;
}

.room-empty h1 {
  font-size: clamp(2rem, 4vw, 3.4rem);
}

.room-notes-box {
  display: grid;
  gap: 0.45rem;
}

.toast {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: 20;
  min-width: 220px;
  max-width: min(92vw, 420px);
  padding: 0.9rem 1rem;
  border-radius: 10px;
  background: var(--line-strong);
  color: #ffffff;
  box-shadow: var(--shadow);
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.18s ease, transform 0.18s ease;
  pointer-events: none;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1100px) {
  .site-header,
  .hero-grid,
  .split-grid {
    grid-template-columns: 1fr;
  }

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

  .hero-panel h1,
  .room-empty h1 {
    max-width: none;
  }

  .summary-grid.four-up,
  .summary-grid.six-up,
  .auction-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .room-hero {
    flex-direction: column;
  }

  .room-hero-actions {
    align-items: flex-start;
  }
}

@media (max-width: 760px) {
  .site-shell {
    width: min(100% - 1rem, 1280px);
    padding-top: 0.75rem;
  }

  .summary-grid.four-up,
  .summary-grid.three-up,
  .summary-grid.six-up,
  .auction-grid {
    grid-template-columns: 1fr;
  }

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

  .drop-interval-grid {
    grid-template-columns: 1fr;
  }

  .card-head,
  .room-hero,
  .site-header {
    gap: 0.9rem;
  }

  .site-header {
    padding: 1rem;
  }

  .site-nav {
    gap: 0.35rem;
  }

  .section-head {
    flex-direction: column;
  }

  .section-head .section-note {
    max-width: none;
    text-align: left;
  }

  .action-row,
  .card-actions,
  .form-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .button {
    width: 100%;
  }
}