:root {
  color-scheme: light;
  --paper: #f4f1e8;
  --paper-deep: #e8e1d2;
  --ink: #18241f;
  --muted: #657069;
  --line: rgba(24, 36, 31, 0.14);
  --white: #fffefa;
  --green: #176b54;
  --green-dark: #0f4e3d;
  --green-soft: #dcebe3;
  --coral: #ec765c;
  --yellow: #efc85e;
  --error: #a8362a;
  --shadow: 0 20px 70px rgba(46, 54, 44, 0.11);
  --radius-lg: 28px;
  --radius-md: 18px;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(circle at 88% 10%, rgba(239, 200, 94, 0.2), transparent 27rem),
    radial-gradient(circle at 2% 42%, rgba(23, 107, 84, 0.11), transparent 24rem),
    var(--paper);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}

button,
input {
  font: inherit;
}

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

[hidden] {
  display: none !important;
}

.shell {
  width: min(100% - 32px, 780px);
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 10px;
  left: 10px;
  padding: 10px 14px;
  color: white;
  background: var(--ink);
  border-radius: 10px;
  transform: translateY(-160%);
}

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

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 22px;
}

.brand {
  display: inline-flex;
  gap: 10px;
  align-items: center;
  color: var(--ink);
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-decoration: none;
}

.brand-mark {
  position: relative;
  display: inline-block;
  width: 30px;
  height: 22px;
}

.brand-mark span {
  position: absolute;
  top: 1px;
  width: 20px;
  height: 20px;
  border: 2px solid var(--ink);
  border-radius: 50%;
}

.brand-mark span:first-child {
  left: 0;
  background: var(--yellow);
}

.brand-mark span:last-child {
  right: 0;
  background: var(--coral);
  mix-blend-mode: multiply;
}

.privacy-chip {
  display: inline-flex;
  gap: 7px;
  align-items: center;
  padding: 7px 10px;
  color: var(--green-dark);
  background: rgba(255, 254, 250, 0.62);
  border: 1px solid rgba(23, 107, 84, 0.14);
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
}

.privacy-dot {
  width: 7px;
  height: 7px;
  background: #2d9a73;
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(45, 154, 115, 0.12);
}

.hero {
  padding: 46px 2px 35px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 12px;
  color: var(--green);
  font-size: 0.76rem;
  font-weight: 850;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.eyebrow span {
  display: inline-grid;
  width: 22px;
  height: 22px;
  place-items: center;
  margin-right: 4px;
  color: var(--white);
  background: var(--green);
  border-radius: 50%;
  letter-spacing: 0;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  max-width: 690px;
  margin: 0;
  font-family: Georgia, "Noto Serif SC", "Songti SC", serif;
  font-size: clamp(3rem, 15vw, 5.7rem);
  font-weight: 500;
  line-height: 0.98;
  letter-spacing: -0.055em;
}

.hero-copy {
  max-width: 610px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: clamp(1rem, 3.8vw, 1.15rem);
  line-height: 1.75;
}

.connection-card,
.game-card {
  background: rgba(255, 254, 250, 0.88);
  border: 1px solid rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.connection-card {
  padding: 18px;
  border-radius: var(--radius-md);
}

.connection-summary {
  display: flex;
  gap: 13px;
  align-items: center;
}

.connection-summary h2 {
  margin: 0 0 3px;
  font-size: 0.95rem;
}

.connection-summary p {
  margin: 0;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.45;
}

.connection-indicator {
  display: flex;
  flex: 0 0 46px;
  gap: 3px;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  background: var(--paper);
  border-radius: 15px;
}

.connection-indicator span {
  width: 5px;
  height: 5px;
  background: #9ba29d;
  border-radius: 50%;
}

.connection-indicator.is-connecting span {
  animation: bounce 1.2s infinite ease-in-out;
}

.connection-indicator.is-connecting span:nth-child(2) {
  animation-delay: 0.15s;
}

.connection-indicator.is-connecting span:nth-child(3) {
  animation-delay: 0.3s;
}

.connection-indicator.is-connected {
  background: var(--green-soft);
}

.connection-indicator.is-connected span {
  width: 8px;
  height: 8px;
  background: var(--green);
}

.connection-indicator.is-connected span:nth-child(2) {
  width: 14px;
  height: 2px;
  border-radius: 1px;
}

.connection-indicator.is-offline {
  background: #f4ddd8;
}

.connection-indicator.is-offline span {
  background: var(--error);
}

.share-area,
.join-area {
  margin-top: 16px;
  padding-top: 15px;
  border-top: 1px solid var(--line);
}

.question-form {
  margin-top: 16px;
  padding-top: 15px;
  border-top: 1px solid var(--line);
}

.question-form label,
.share-area label,
.number-form label {
  display: block;
  margin-bottom: 8px;
  font-size: 0.82rem;
  font-weight: 750;
}

.question-input-row {
  display: grid;
  gap: 8px;
}

.question-input-row input {
  width: 100%;
  min-width: 0;
  height: 50px;
  padding: 0 14px;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 12px;
  outline: none;
  transition: border-color 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.question-input-row input:focus {
  background: white;
  border-color: var(--green);
  box-shadow: 0 0 0 4px rgba(23, 107, 84, 0.12);
}

.question-input-row input[aria-invalid="true"] {
  border-color: var(--error);
  box-shadow: 0 0 0 4px rgba(168, 54, 42, 0.1);
}

.question-input-row .primary-button {
  min-height: 50px;
  margin-top: 0;
}

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

.share-row input {
  grid-column: 1 / -1;
  min-width: 0;
  height: 44px;
  padding: 0 12px;
  color: var(--muted);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 11px;
  font-size: 0.78rem;
}

.secondary-button,
.error-banner button {
  min-height: 44px;
  padding: 0 14px;
  color: var(--ink);
  background: transparent;
  border: 1px solid rgba(24, 36, 31, 0.24);
  border-radius: 11px;
  font-weight: 750;
  cursor: pointer;
}

.secondary-button:hover,
.error-banner button:hover {
  background: var(--paper);
}

.field-help {
  margin: 7px 0 0;
  color: var(--muted);
  font-size: 0.75rem;
  line-height: 1.5;
}

.mini-label {
  display: block;
  margin-bottom: 4px;
  color: var(--green);
  font-size: 0.7rem;
  font-weight: 850;
  letter-spacing: 0.12em;
}

.join-area p {
  margin: 0;
  color: var(--muted);
  font-size: 0.82rem;
}

.error-banner {
  display: flex;
  gap: 10px;
  align-items: center;
  justify-content: space-between;
  margin-top: 14px;
  padding: 10px 10px 10px 13px;
  color: #7e2b23;
  background: #f8e5e1;
  border-radius: 12px;
  font-size: 0.8rem;
  line-height: 1.45;
}

.error-banner button {
  flex: 0 0 auto;
  min-height: 36px;
  color: #7e2b23;
  border-color: rgba(126, 43, 35, 0.25);
  font-size: 0.76rem;
}

.game-card {
  position: relative;
  margin-top: 18px;
  padding: 22px 18px;
  overflow: hidden;
  border-radius: var(--radius-lg);
}

.game-card::before {
  position: absolute;
  top: 0;
  right: 0;
  width: 110px;
  height: 8px;
  background: linear-gradient(90deg, var(--yellow), var(--coral));
  border-radius: 0 0 0 10px;
  content: "";
}

.round-header {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  justify-content: space-between;
}

.round-header .section-kicker {
  margin-bottom: 5px;
}

.round-header h2 {
  margin: 0;
  font-family: Georgia, "Noto Serif SC", "Songti SC", serif;
  font-size: 1.55rem;
  font-weight: 550;
  letter-spacing: -0.03em;
}

.round-badge {
  flex: 0 0 auto;
  padding: 7px 9px;
  color: var(--muted);
  background: var(--paper);
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 750;
}

.round-badge.is-ready {
  color: var(--green-dark);
  background: var(--green-soft);
}

.participant-row {
  display: grid;
  grid-template-columns: 1fr 28px 1fr;
  align-items: center;
  margin: 25px 0 28px;
}

.participant {
  display: flex;
  gap: 9px;
  align-items: center;
  min-width: 0;
}

.participant-icon {
  display: grid;
  flex: 0 0 39px;
  width: 39px;
  height: 39px;
  place-items: center;
  color: var(--muted);
  background: var(--paper);
  border: 1px solid transparent;
  border-radius: 50%;
  font-size: 0.68rem;
  font-weight: 850;
}

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

.participant strong {
  margin-bottom: 2px;
  font-size: 0.83rem;
}

.participant small {
  color: var(--muted);
  font-size: 0.7rem;
  white-space: nowrap;
}

.participant[data-state="committed"] .participant-icon,
.participant[data-state="done"] .participant-icon {
  color: white;
  background: var(--green);
  border-color: var(--green);
}

.participant[data-state="committed"] small,
.participant[data-state="done"] small {
  color: var(--green);
  font-weight: 700;
}

.participant-link {
  width: 100%;
  height: 1px;
  background: repeating-linear-gradient(90deg, var(--line), var(--line) 3px, transparent 3px, transparent 6px);
}

.number-input-wrap {
  position: relative;
}

.number-input-wrap input {
  width: 100%;
  height: 76px;
  padding: 0 52px 0 18px;
  color: var(--ink);
  background: #f8f5ed;
  border: 1px solid rgba(24, 36, 31, 0.18);
  border-radius: 16px;
  outline: none;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: clamp(1.6rem, 8vw, 2.35rem);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.05em;
  transition: border-color 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.number-input-wrap input:focus {
  background: white;
  border-color: var(--green);
  box-shadow: 0 0 0 4px rgba(23, 107, 84, 0.12);
}

.number-input-wrap input[aria-invalid="true"] {
  border-color: var(--error);
  box-shadow: 0 0 0 4px rgba(168, 54, 42, 0.1);
}

.number-input-wrap input:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.input-caret {
  position: absolute;
  top: 50%;
  right: 18px;
  color: var(--coral);
  font-family: Georgia, serif;
  font-size: 1.1rem;
  font-weight: 700;
  transform: translateY(-50%);
}

.input-error {
  margin: 8px 0 0;
  color: var(--error);
  font-size: 0.78rem;
  font-weight: 650;
}

.primary-button {
  display: flex;
  width: 100%;
  min-height: 54px;
  align-items: center;
  justify-content: space-between;
  margin-top: 20px;
  padding: 0 20px;
  color: white;
  background: var(--green);
  border: 0;
  border-radius: 14px;
  box-shadow: 0 9px 22px rgba(23, 107, 84, 0.2);
  font-weight: 800;
  cursor: pointer;
  transition: transform 160ms ease, background 160ms ease, box-shadow 160ms ease;
}

.primary-button:hover:not(:disabled) {
  background: var(--green-dark);
  box-shadow: 0 11px 26px rgba(23, 107, 84, 0.26);
  transform: translateY(-1px);
}

.primary-button:active:not(:disabled) {
  transform: translateY(1px);
}

.primary-button:disabled {
  color: #858c87;
  background: #dfe0da;
  box-shadow: none;
  cursor: not-allowed;
}

.lock-note {
  display: flex;
  gap: 7px;
  align-items: flex-start;
  justify-content: center;
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 0.72rem;
  line-height: 1.5;
  text-align: center;
}

.lock-note span {
  color: var(--green);
}

.waiting-panel {
  padding: 28px 5px 18px;
  text-align: center;
}

.waiting-orbit {
  position: relative;
  width: 68px;
  height: 68px;
  margin: 0 auto 19px;
  background: var(--green-soft);
  border-radius: 50%;
}

.waiting-orbit::before,
.waiting-orbit::after {
  position: absolute;
  border-radius: 50%;
  content: "";
}

.waiting-orbit::before {
  inset: 21px;
  background: var(--green);
}

.waiting-orbit::after {
  inset: -6px;
  border: 1px dashed rgba(23, 107, 84, 0.35);
  animation: spin 6s linear infinite;
}

.waiting-orbit span {
  position: absolute;
  z-index: 2;
  top: -8px;
  left: 27px;
  width: 14px;
  height: 14px;
  background: var(--coral);
  border: 3px solid var(--white);
  border-radius: 50%;
}

.waiting-panel h3,
.result-panel h3 {
  margin: 0;
  font-family: Georgia, "Noto Serif SC", "Songti SC", serif;
  font-size: 1.5rem;
  font-weight: 550;
}

.waiting-panel p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.result-panel {
  padding-top: 8px;
}

.reveal-heading {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-bottom: 22px;
}

.reveal-heading .section-kicker {
  margin-bottom: 3px;
}

.reveal-spark {
  display: grid;
  flex: 0 0 46px;
  width: 46px;
  height: 46px;
  place-items: center;
  color: var(--ink);
  background: var(--yellow);
  border-radius: 14px;
  font-size: 1.2rem;
  transform: rotate(-4deg);
}

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

.result-tile {
  min-width: 0;
  min-height: 138px;
  padding: 16px 13px;
  border-radius: 18px;
}

.result-local {
  color: white;
  background: var(--green);
}

.result-remote {
  color: var(--ink);
  background: #f3d77f;
}

.result-tile span {
  display: block;
  margin-bottom: 28px;
  font-size: 0.72rem;
  font-weight: 700;
  opacity: 0.75;
}

.result-tile strong {
  display: block;
  max-width: 100%;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: clamp(1.35rem, 7vw, 2.3rem);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.07em;
  line-height: 1.1;
  overflow-wrap: anywhere;
  word-break: break-all;
}

.centered {
  text-align: center;
}

.trust-row {
  display: grid;
  gap: 16px;
  padding: 34px 4px 14px;
}

.trust-row > div {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 10px;
  align-items: start;
}

.trust-row > div > span {
  padding-top: 2px;
  color: var(--coral);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 0.7rem;
  font-weight: 800;
}

.trust-row p {
  margin: 0;
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.55;
}

.trust-row strong {
  margin-right: 4px;
  color: var(--ink);
}

.site-footer {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding-block: 34px 28px;
  color: var(--muted);
  font-size: 0.7rem;
  line-height: 1.45;
  text-align: center;
}

.site-footer p {
  margin: 0;
}

.toast {
  position: fixed;
  z-index: 50;
  right: 16px;
  bottom: 16px;
  left: 16px;
  max-width: 420px;
  margin-inline: auto;
  padding: 12px 16px;
  color: white;
  background: var(--ink);
  border-radius: 12px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
  font-size: 0.82rem;
  font-weight: 700;
  text-align: center;
}

.noscript {
  position: fixed;
  z-index: 99;
  inset: 0 0 auto;
  padding: 12px;
  color: white;
  background: var(--error);
  text-align: center;
}

button:focus-visible,
input:focus-visible,
a:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid rgba(236, 118, 92, 0.55);
  outline-offset: 3px;
}

@keyframes bounce {
  0%,
  60%,
  100% {
    transform: translateY(0);
  }
  30% {
    transform: translateY(-5px);
  }
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@media (min-width: 600px) {
  .shell {
    width: min(100% - 56px, 780px);
  }

  .site-header {
    padding-block: 28px;
  }

  .hero {
    padding: 70px 4px 45px;
  }

  .connection-card {
    padding: 21px 23px;
  }

  .share-row {
    grid-template-columns: minmax(0, 1fr) auto auto;
  }

  .question-input-row {
    grid-template-columns: minmax(0, 1fr) 170px;
  }

  .share-row input {
    grid-column: auto;
  }

  .game-card {
    padding: 32px 34px;
  }

  .round-header h2 {
    font-size: 1.8rem;
  }

  .participant-row {
    grid-template-columns: 1fr 80px 1fr;
    margin: 28px 0 31px;
  }

  .participant:nth-of-type(2) {
    justify-content: flex-end;
  }

  .number-input-wrap input {
    height: 88px;
  }

  .result-tile {
    min-height: 170px;
    padding: 20px;
  }

  .result-tile span {
    margin-bottom: 38px;
  }

  .trust-row {
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
    padding-top: 42px;
  }

  .trust-row > div {
    display: block;
  }

  .trust-row > div > span {
    display: block;
    margin-bottom: 8px;
  }

  .site-footer {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

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