:root {
  color-scheme: light;
  --ink: #192821;
  --muted: #69766e;
  --paper: #f4f7f1;
  --surface: #ffffff;
  --line: #dce5db;
  --green: #176b50;
  --green-dark: #10543e;
  --mint: #dff1e7;
  --coral: #f07861;
  --yellow: #f5d66f;
  --shadow: 0 22px 60px rgb(25 40 33 / 8%);
}

* {
  box-sizing: border-box;
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(ellipse at 8% 10%, rgb(245 214 111 / 20%), transparent 28rem),
    radial-gradient(ellipse at 95% 75%, rgb(168 218 190 / 25%), transparent 30rem),
    var(--paper);
  color: var(--ink);
  font-family: "DM Sans", sans-serif;
  display: flex;
  flex-direction: column;
}

h1,
h2,
h3,
.brand {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
}

h1 {
  max-width: 15ch;
  margin: 0;
  font-size: clamp(2.25rem, 5vw, 4.25rem);
  line-height: 1.04;
}

h2 {
  margin: 0 0 1.4rem;
  font-size: 1.6rem;
}

a {
  color: var(--green);
  font-weight: 700;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--green-dark);
}

button,
input,
select {
  font: inherit;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 3px solid var(--coral);
  outline-offset: 3px;
}

.site-header {
  position: relative;
  z-index: 1;
  background: var(--ink);
  color: white;
}

.header-inner {
  min-height: 82px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: white;
  font-size: 1.13rem;
  text-decoration: none;
  white-space: nowrap;
}

.brand:hover {
  color: var(--yellow);
}

.brand-mark {
  display: grid;
  width: 38px;
  aspect-ratio: 1;
  place-items: center;
  border-radius: 12px;
  background: var(--yellow);
  color: var(--ink);
  font-size: 0.85rem;
  font-weight: 700;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-link {
  padding: 0.65rem 0.9rem;
  border-radius: 8px;
  color: #d5e1d9;
  font-size: 0.92rem;
  font-weight: 600;
  text-decoration: none;
  transition: background-color 160ms ease, color 160ms ease;
}

.nav-link:hover,
.nav-link.active {
  background: #2a3c33;
  color: white;
}

.nav-link.active {
  box-shadow: inset 0 -2px var(--yellow);
}

.page-shell {
  flex: 1;
  padding-top: clamp(3rem, 7vw, 6rem);
  padding-bottom: clamp(3rem, 7vw, 6rem);
}

.eyebrow {
  margin: 0 0 0.85rem;
  color: var(--green);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.lead-copy {
  max-width: 48ch;
  margin: 1rem 0 0;
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.7;
}

.welcome-copy h1 span {
  color: var(--green);
}

.mini-board {
  display: grid;
  width: min(100%, 260px);
  aspect-ratio: 3 / 2;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-top: 2.3rem;
  transform: rotate(-5deg);
}

.mini-board span {
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgb(255 255 255 / 75%);
  color: var(--green);
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.65rem;
  font-weight: 700;
  box-shadow: 0 6px 14px rgb(25 40 33 / 5%);
}

.mini-board span:nth-child(3n + 1) {
  color: var(--coral);
}

.card,
.history-panel {
  border: 1px solid rgb(220 229 219 / 85%);
  border-radius: 14px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.auth-panel .card-body,
.option-panel .card-body,
.profile-panel .card-body {
  padding: clamp(1.4rem, 4vw, 2.4rem);
}

.auth-panel h2,
.profile-panel h2 {
  margin-bottom: 1.6rem;
}

.form-label {
  color: var(--ink);
  font-size: 0.92rem;
  font-weight: 700;
}

.form-control,
.form-select {
  min-height: 48px;
  border-color: var(--line);
  border-radius: 8px;
  color: var(--ink);
}

.form-control::placeholder {
  color: #98a39b;
}

.form-control:focus,
.form-select:focus {
  border-color: var(--green);
  box-shadow: 0 0 0 0.2rem rgb(23 107 80 / 14%);
}

.btn {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  border-radius: 8px;
  font-weight: 700;
  transition: transform 160ms ease, background-color 160ms ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  border-color: var(--green);
  background: var(--green);
  color: white;
}

.btn-primary:hover,
.btn-primary:focus {
  border-color: var(--green-dark);
  background: var(--green-dark);
  color: white;
}

.account-prompt {
  margin: 1.25rem 0 0;
  color: var(--muted);
  font-size: 0.92rem;
  text-align: center;
}

.site-footer {
  min-height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.88rem;
}

.site-footer a {
  text-align: right;
}

.page-heading {
  margin-bottom: 2.4rem;
}

.page-heading h1 {
  font-size: clamp(2rem, 4vw, 3.25rem);
}

.page-heading .lead-copy {
  margin-top: 0.65rem;
}

.choice-group {
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

.choice-group legend {
  float: none;
  width: auto;
  margin-bottom: 0.9rem;
  color: var(--ink);
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.12rem;
  font-weight: 700;
}

.mode-options {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
}

.mode-choice {
  min-height: 82px;
  display: flex;
  align-items: flex-start;
  gap: 0.55rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fbfcfa;
}

.mode-choice:has(input:checked) {
  border-color: var(--green);
  background: var(--mint);
}

.mode-choice .form-check-input {
  flex: 0 0 auto;
  margin-top: 0.22rem;
}

.form-check-input:checked {
  border-color: var(--green);
  background-color: var(--green);
}

.form-check-label {
  display: grid;
  gap: 0.2rem;
  color: var(--muted);
  font-size: 0.88rem;
}

.form-check-label strong {
  color: var(--ink);
  font-size: 0.98rem;
}

.bot-settings {
  margin-top: 2rem;
}

.start-button {
  width: 100%;
  margin-top: 1.7rem;
}

.profile-panel {
  overflow: hidden;
  background: #e4f1e8;
}

.profile-figure {
  margin: 1.5rem 0 1.2rem;
  text-align: center;
}

.profile-figure img {
  width: min(100%, 160px);
  aspect-ratio: 1;
  border: 6px solid white;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: 0 8px 24px rgb(25 40 33 / 10%);
}

.profile-figure figcaption {
  max-width: 32ch;
  margin: 1rem auto 0;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.55;
}

.api-link {
  display: inline-block;
  font-size: 0.88rem;
}

.game-stage {
  padding: clamp(1.1rem, 4vw, 2.25rem);
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.match-strip {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(1rem, 5vw, 3rem);
  padding: 0.2rem 0 1.4rem;
  border-bottom: 1px solid var(--line);
}

.match-strip > div {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 700;
}

.player-token,
.opponent-mark {
  display: inline-grid;
  flex: 0 0 auto;
  width: 36px;
  aspect-ratio: 1;
  place-items: center;
  border-radius: 10px;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
}

.token-x {
  background: #fff0ec;
  color: #c94f3b;
}

.token-o {
  background: var(--mint);
  color: var(--green);
}

.versus {
  color: #9aa69d;
  font-size: 0.72rem;
  font-weight: 700;
}

.game-prompt {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  margin: 1.2rem 0 0.5rem;
  color: var(--muted);
  font-weight: 600;
}

.turn-dot,
.live-indicator::before {
  width: 8px;
  aspect-ratio: 1;
  border-radius: 50%;
  background: #53a87c;
  content: "";
}

.game-board {
  width: min(100%, 440px);
  margin: 0 auto;
  border-collapse: separate;
  border-spacing: clamp(0.35rem, 1.5vw, 0.75rem);
  table-layout: fixed;
}

.game-board td {
  width: 33.333%;
  padding: 0;
}

.square {
  width: 100%;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #f7faf6;
  color: var(--ink);
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(2.3rem, 8vw, 4.5rem);
  font-weight: 700;
  line-height: 1;
  transition: border-color 150ms ease, background-color 150ms ease, transform 150ms ease;
}

.square:not(:disabled):hover {
  transform: scale(1.025);
  border-color: #91bba2;
  background: var(--mint);
}

.square.mark-x {
  color: var(--coral);
}

.square.mark-o {
  color: var(--green);
}

.board-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 1.1rem;
  margin-top: 1rem;
}

.btn-outline-secondary {
  border-color: var(--line);
  color: var(--ink);
}

.btn-outline-secondary:hover {
  border-color: var(--ink);
  background: var(--ink);
  color: white;
}

.match-sidebar {
  display: grid;
  gap: 1.3rem;
}

.dialogue-panel {
  background: var(--yellow);
}

.dialogue-panel .card-body {
  padding: 1.6rem;
}

.bot-quote {
  margin: 0 0 1.5rem;
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.35rem;
  font-weight: 600;
  line-height: 1.4;
}

.match-status {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
  padding-top: 1rem;
  border-top: 1px solid rgb(25 40 33 / 15%);
  font-size: 0.9rem;
  font-weight: 600;
}

.status-pill,
.mode-tag,
.result-tag {
  display: inline-block;
  padding: 0.35rem 0.65rem;
  border-radius: 999px;
  background: white;
  color: var(--ink);
  font-size: 0.78rem;
  font-weight: 700;
}

.updates-panel {
  padding: 1.3rem 0;
  border-bottom: 1px solid var(--line);
}

.updates-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.updates-heading h2 {
  margin: 0;
  font-size: 1.2rem;
}

.live-indicator {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--green);
  font-size: 0.68rem;
  font-weight: 700;
}

.updates-panel ul {
  margin: 1rem 0 0;
  padding-left: 1.2rem;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.6;
}

#turn {
  color: var(--green-dark);
  font-weight: 700;
}

#result {
  font-weight: 700;
}

#live-updates {
  max-width: 44ch;
  overflow-wrap: anywhere;
}

.history-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 2rem;
}

.history-heading .btn {
  flex: 0 0 auto;
  margin-bottom: 0.25rem;
  padding: 0.7rem 1.1rem;
}

.history-panel {
  overflow: hidden;
  padding: 0.5rem clamp(0.8rem, 3vw, 1.8rem) 0;
}

.history-table {
  min-width: 550px;
  margin: 0;
  --bs-table-bg: transparent;
  --bs-table-color: var(--ink);
}

.history-table thead th {
  padding: 1.1rem 0.9rem;
  border-bottom-color: var(--line);
  color: var(--muted);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.history-table tbody td {
  padding: 1.1rem 0.9rem;
  border-bottom-color: #edf1ec;
  font-size: 0.94rem;
}

.history-table tbody tr:last-child td {
  border-bottom: 0;
}

.history-table tbody tr:hover {
  --bs-table-bg: #f8faf7;
}

.opponent-mark {
  width: 30px;
  margin-right: 0.6rem;
  border-radius: 50%;
  font-size: 0.78rem;
}

.mark-nova {
  background: #fff0ec;
  color: #c94f3b;
}

.mark-jordan {
  background: #e8eaff;
  color: #555fa4;
}

.mark-milo {
  background: var(--mint);
  color: var(--green);
}

.mode-tag {
  background: #eef3ee;
  color: #536158;
}

.result-win {
  background: #e2f3e8;
  color: #176b50;
}

.result-draw {
  background: #fff4d7;
  color: #856700;
}

.result-loss {
  background: #ffebe7;
  color: #a64232;
}

.data-note {
  margin: 0;
  padding: 0.85rem 0.9rem 1rem;
  border-top: 1px solid #edf1ec;
  color: var(--muted);
  font-size: 0.8rem;
}

@media (max-width: 767.98px) {
  .header-inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.7rem;
    padding-top: 1rem;
    padding-bottom: 1rem;
  }

  .nav-list {
    justify-content: flex-start;
    gap: 0.15rem;
  }

  .nav-link {
    padding: 0.5rem 0.6rem;
    font-size: 0.82rem;
  }

  .page-shell {
    padding-top: 2.8rem;
    padding-bottom: 3rem;
  }

  .mini-board {
    width: min(100%, 220px);
    margin-top: 1.5rem;
  }

  .history-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 1.2rem;
  }

  .site-footer {
    min-height: 64px;
    font-size: 0.8rem;
  }
}

@media (max-width: 420px) {
  .nav-list {
    gap: 0;
  }

  .nav-link {
    padding: 0.45rem 0.48rem;
    font-size: 0.76rem;
  }

  .mode-options {
    grid-template-columns: 1fr;
  }

  .match-strip {
    gap: 0.85rem;
  }

  .match-strip > div {
    gap: 0.4rem;
  }

  .player-token {
    width: 32px;
  }
}

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