@import url("https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=DM+Sans:wght@400;500;600;700&family=Playfair+Display:ital,wght@0,600;0,700;1,600;1,700&display=swap");

:root {
  color-scheme: light;
  --paper: #f7f5ef;
  --ink: #233e37;
  --muted: #718079;
  --green: #305b4e;
  --green-dark: #24493e;
  --mint: #e6eee5;
  --coral: #e98670;
  --line: #e7e4db;
  --mono: "DM Mono", monospace;
  --sans: "DM Sans", sans-serif;
  --serif: "Playfair Display", Georgia, serif;
}

* { box-sizing: border-box; }

body {
  min-width: 0;
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(ellipse at 75% 48%, rgba(231, 235, 221, .56), transparent 38%),
    var(--paper);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}

button { font: inherit; }

.page-shell {
  width: min(1120px, calc(100% - 80px));
  min-height: 100vh;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
}

.topbar {
  height: 86px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(45, 74, 62, .11);
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -.5px;
  text-decoration: none;
}

.wordmark-icon { color: var(--coral); font-size: 21px; }
.top-note { color: var(--muted); font-size: 12px; letter-spacing: .1px; }
.status-dot { display: inline-block; width: 7px; height: 7px; margin: 0 7px 1px 0; border-radius: 50%; background: #9bb995; }

.game-layout {
  flex: 1;
  display: grid;
  grid-template-columns: minmax(250px, .72fr) minmax(500px, 1.28fr);
  align-items: center;
  gap: clamp(50px, 8vw, 110px);
  padding: 56px 0 62px;
}

.intro { max-width: 340px; }
.eyebrow, .game-label, .stat-label, .page-footer {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 1.25px;
}

.eyebrow { margin: 0 0 19px; color: #8c958a; }

h1 {
  margin: 0;
  color: #26473c;
  font-family: var(--serif);
  font-size: clamp(43px, 5vw, 60px);
  font-weight: 600;
  letter-spacing: -2.1px;
  line-height: 1.06;
}

h1 span { color: var(--coral); font-style: italic; }
.intro-copy { max-width: 290px; margin: 21px 0 28px; color: #758078; font-size: 14px; line-height: 1.8; }

.difficulty-picker { display: flex; gap: 9px; margin-bottom: 18px; }

.size-button {
  min-width: 116px;
  padding: 10px 12px 9px;
  border: 1px solid #e2e2d8;
  border-radius: 8px;
  color: #66766e;
  background: rgba(255, 255, 255, .4);
  cursor: pointer;
  font-size: 11px;
  font-weight: 600;
  text-align: left;
  transition: border-color .18s ease, background .18s ease, color .18s ease;
}

.size-button span { display: block; margin-top: 3px; color: #a0a79d; font-family: var(--mono); font-size: 9px; font-weight: 400; }
.size-button:hover { border-color: #9caf9f; }
.size-button.is-selected { border-color: var(--green); color: white; background: var(--green); }
.size-button.is-selected span { color: #cfddd0; }

.new-game-button {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 18px;
  border: 0;
  border-radius: 7px;
  color: #fff;
  background: var(--green);
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  transition: background .18s ease, transform .18s ease;
}

.new-game-button:hover { background: var(--green-dark); transform: translateY(-1px); }
.new-game-button span { font-size: 14px; }
.gentle-note { margin: 19px 0 0; color: #9a9e92; font-size: 11px; }
.gentle-note span { margin-right: 5px; color: var(--coral); }

.game-card {
  position: relative;
  padding: 22px 24px 17px;
  border: 1px solid rgba(59, 83, 68, .06);
  border-radius: 14px;
  background: rgba(255, 255, 255, .76);
  box-shadow: 0 16px 48px rgba(63, 73, 57, .07), 0 2px 8px rgba(63, 73, 57, .03);
}

.game-card-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.game-label { display: flex; align-items: center; gap: 7px; color: #869087; font-size: 9px; letter-spacing: 1px; white-space: nowrap; }
.sparkle { color: var(--coral); font-size: 14px; }
.stats { display: flex; align-items: center; gap: 15px; }
.fullscreen-actions { display: none; align-items: center; gap: 8px; }
.restart-game-button, .exit-game-button {
  padding: 9px 12px;
  border: 1px solid #dfe6dc;
  border-radius: 7px;
  color: #526b5c;
  background: #fffefa;
  cursor: pointer;
  font-size: 11px;
  font-weight: 600;
}
.restart-game-button:hover, .exit-game-button:hover { border-color: #9caf9f; background: #f3f6ef; }
.exit-game-button span { margin-right: 3px; font-size: 15px; }
.stat { min-width: 29px; text-align: center; }
.stat-label { display: block; margin-bottom: 4px; color: #a3a99f; font-size: 8px; letter-spacing: .9px; }
.stat strong { color: #415b4d; font-family: var(--mono); font-size: 13px; font-weight: 500; }
.stat-divider { width: 1px; height: 25px; background: #ecebe5; }

.progress-track { height: 3px; margin: 17px 0 13px; overflow: hidden; border-radius: 3px; background: #edf0e9; }
.progress-fill { display: block; width: 0; height: 100%; border-radius: inherit; background: #91ac89; transition: width .3s ease; }

.board {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 9px;
}

.card {
  position: relative;
  display: grid;
  min-width: 0;
  aspect-ratio: 1.15 / 1;
  place-items: center;
  padding: 0;
  overflow: hidden;
  border: 1px solid #dfe8df;
  border-radius: 8px;
  background: #eaf0e9;
  cursor: pointer;
  transform-style: preserve-3d;
  transition: transform .32s cubic-bezier(.2, .75, .3, 1), background .2s ease, border-color .2s ease, box-shadow .2s ease;
}

.card:hover:not(.is-revealed):not(.is-matched) { border-color: #a6bca6; background: #e2ece1; transform: translateY(-2px); }
.card:focus-visible, button:focus-visible { outline: 3px solid #dc927d; outline-offset: 3px; }
.card-face { position: absolute; display: grid; width: 100%; height: 100%; place-items: center; transition: opacity .16s ease, transform .2s ease; }
.card-back { color: #78927a; font-size: 21px; font-weight: 400; }
.card-front { color: #40594b; visibility: hidden; background: #fffefa; font-size: clamp(32px, 4vw, 46px); opacity: 0; transform: scale(.7); }
.card.is-revealed { border-color: #e5d5c9; background: white; }
.card.is-matched { border-color: #dbe9d8; background: #edf4e9; cursor: default; }
.card.is-revealed .card-back, .card.is-matched .card-back { visibility: hidden; opacity: 0; transform: scale(.7); }
.card.is-revealed .card-front, .card.is-matched .card-front { visibility: visible; opacity: 1; transform: scale(1); }
.card.is-matched .card-front { background: #edf4e9; }
.board.is-large { grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 7px; }
.board.is-large .card { border-radius: 6px; }
.board.is-large .card-back { font-size: 16px; }
.board.is-large .card-front { font-size: clamp(25px, 3vw, 38px); }

.game-footer { display: flex; justify-content: space-between; gap: 12px; padding-top: 15px; color: #a1a79e; font-size: 10px; }
.footer-icon { margin-right: 4px; color: var(--coral); font-size: 13px; }
.game-footer #game-hint { color: #7e8a7f; }

.game-card.is-fullscreen {
  position: fixed;
  inset: 0;
  z-index: 10;
  display: flex;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  max-width: none;
  flex-direction: column;
  gap: clamp(12px, 2vh, 22px);
  margin: 0;
  padding: clamp(16px, 3vh, 32px) clamp(16px, 4vw, 64px);
  overflow: hidden;
  border: 0;
  border-radius: 0;
  background: var(--paper);
  box-shadow: none;
}

.game-card.is-fullscreen .game-card-top { flex: none; }
.game-card.is-fullscreen .fullscreen-actions { display: flex; }
.game-card.is-fullscreen .progress-track { flex: none; width: 100%; margin: 0; }
.game-card.is-fullscreen .board {
  width: 100%;
  min-height: 0;
  flex: 1;
  grid-template-rows: repeat(4, minmax(0, 1fr));
  align-content: stretch;
  gap: clamp(6px, 1.3vmin, 16px);
}
.game-card.is-fullscreen .board.is-large { grid-template-rows: repeat(6, minmax(0, 1fr)); }
.game-card.is-fullscreen .card {
  min-height: 0;
  aspect-ratio: auto;
  border-radius: 12px;
}
.game-card.is-fullscreen .card-front { font-size: clamp(42px, min(8vw, 10vh), 104px); }
.game-card.is-fullscreen .board.is-large .card-front { font-size: clamp(28px, min(5.5vw, 7vh), 68px); }
.game-card.is-fullscreen .game-footer { flex: none; padding-top: 0; font-size: 11px; }
.game-card.is-fullscreen .win-message { inset: 84px clamp(16px, 4vw, 64px) 58px; }
body.game-is-fullscreen { overflow: hidden; }

.win-message {
  position: absolute;
  inset: 57px 24px 48px;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 15px;
  border: 1px solid rgba(65, 91, 77, .12);
  border-radius: 10px;
  background: rgba(250, 250, 244, .96);
  box-shadow: 0 10px 36px rgba(50, 70, 55, .1);
  animation: appear .3s ease both;
}

.win-message[hidden] { display: none; }
.win-icon { color: var(--coral); font-size: 34px; }
.win-message strong, .win-message div span { display: block; }
.win-message strong { font-family: var(--serif); font-size: 22px; }
.win-message div span { margin-top: 4px; color: var(--muted); font-size: 11px; }
.win-message button { padding: 9px 12px; border: 0; border-radius: 6px; color: white; background: var(--green); cursor: pointer; font-size: 11px; }
.win-message button:hover { background: var(--green-dark); }

.theme-dialog {
  width: min(760px, calc(100% - 24px));
  max-width: none;
  max-height: min(90vh, 820px);
  max-height: min(90dvh, 820px);
  margin: auto;
  padding: 0;
  overflow: hidden;
  border: 1px solid rgba(59, 83, 68, .12);
  border-radius: 16px;
  color: var(--ink);
  background: #fffefa;
  box-shadow: 0 24px 80px rgba(35, 52, 40, .22);
}

.theme-dialog::backdrop { background: rgba(26, 43, 35, .55); backdrop-filter: blur(4px); }
.theme-dialog-content { display: flex; max-height: min(90vh, 820px); max-height: min(90dvh, 820px); flex-direction: column; padding: clamp(19px, 4vw, 32px); }
.theme-dialog .eyebrow { margin-bottom: 9px; }
.theme-dialog h2 { margin: 0; color: #26473c; font-family: var(--serif); font-size: clamp(27px, 5vw, 36px); font-weight: 600; letter-spacing: -.8px; }
.theme-description { margin: 8px 0 18px; color: var(--muted); font-size: 13px; line-height: 1.55; }
.theme-options { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 9px; min-height: 0; padding: 2px 4px 2px 2px; overflow-y: auto; overscroll-behavior: contain; }
.theme-option { display: flex; min-height: 69px; align-items: center; gap: 10px; padding: 10px; border: 1px solid #e5e8de; border-radius: 9px; color: #53695b; background: #fff; cursor: pointer; text-align: left; transition: background .16s ease, border-color .16s ease, transform .16s ease; }
.theme-option:hover { border-color: #afc2ad; background: #f5f8f1; transform: translateY(-1px); }
.theme-option.is-selected { border-color: var(--green); color: var(--green-dark); background: #edf4e9; box-shadow: inset 0 0 0 1px var(--green); }
.theme-option:focus-visible { outline: 3px solid #dc927d; outline-offset: 2px; }
.theme-option-icon { display: grid; width: 32px; height: 32px; flex: none; place-items: center; border-radius: 8px; background: #f1f3eb; font-size: 21px; }
.theme-option-label { font-size: 12px; font-weight: 600; line-height: 1.25; }
.theme-note { margin: 11px 0 0; color: #92998f; font-size: 10px; line-height: 1.5; }
.theme-dialog-actions { display: flex; justify-content: flex-end; gap: 9px; padding-top: 17px; }
.theme-cancel-button, .theme-start-button { padding: 10px 16px; border: 1px solid #dfe6dc; border-radius: 7px; cursor: pointer; font-size: 12px; font-weight: 600; }
.theme-cancel-button { color: #63756a; background: #fffefa; }
.theme-start-button { border-color: var(--green); color: #fff; background: var(--green); }
.theme-cancel-button:hover { background: #f4f5ef; }
.theme-start-button:hover { border-color: var(--green-dark); background: var(--green-dark); }
.theme-start-button span { margin-left: 5px; }

.page-footer { display: flex; align-items: center; justify-content: center; gap: 15px; padding: 19px 0 24px; color: #a2a79b; font-size: 8px; letter-spacing: 1.15px; }
.footer-flower { color: var(--coral); font-size: 13px; }

@keyframes appear { from { opacity: 0; transform: translateY(5px); } to { opacity: 1; transform: translateY(0); } }

@media (max-width: 850px) {
  .page-shell { width: min(630px, calc(100% - 48px)); }
  .game-layout { grid-template-columns: 1fr; gap: 32px; padding: 42px 0 36px; }
  .intro { max-width: none; }
  h1 br { display: none; }
  .intro-copy { max-width: 430px; margin: 13px 0 19px; }
  .difficulty-picker { display: inline-flex; vertical-align: middle; margin: 0 10px 0 0; }
  .new-game-button { display: inline-flex; width: auto; vertical-align: middle; }
  .gentle-note { display: none; }
}

@media (max-width: 520px) {
  .page-shell { width: calc(100% - 32px); }
  .topbar { height: 68px; }
  .top-note { font-size: 10px; }
  .game-layout { gap: 24px; padding: 34px 0 28px; }
  .eyebrow { margin-bottom: 13px; font-size: 9px; }
  h1 { font-size: 43px; }
  .intro-copy { max-width: 340px; font-size: 13px; }
  .difficulty-picker { gap: 6px; margin-right: 0; }
  .size-button { min-width: 106px; padding: 9px 10px 8px; font-size: 10px; }
  .new-game-button { width: 100%; margin-top: 10px; }
  .game-card { padding: 17px 13px 13px; border-radius: 11px; }
  .game-card-top { align-items: flex-start; flex-direction: column; gap: 13px; }
  .stats { width: 100%; justify-content: space-around; }
  .stat-divider { height: 22px; }
  .progress-track { margin-top: 14px; }
  .board { gap: 6px; }
  .card { border-radius: 6px; }
  .card-back { font-size: 17px; }
  .card-front { font-size: 27px; }
  .board.is-large { gap: 4px; }
  .board.is-large .card-back { font-size: 13px; }
  .board.is-large .card-front { font-size: 28px; }
  .game-footer { align-items: center; font-size: 9px; }
  .win-message { inset: 74px 13px 43px; gap: 9px; padding: 8px; }
  .win-icon { font-size: 26px; }
  .win-message strong { font-size: 19px; }
  .win-message div span { font-size: 10px; }
  .win-message button { padding: 8px; font-size: 10px; }
  .page-footer { gap: 9px; font-size: 7px; letter-spacing: .7px; }

  .game-card.is-fullscreen { gap: 10px; padding: 12px; }
  .game-card.is-fullscreen .game-card-top { gap: 10px; }
  .game-card.is-fullscreen .game-label { font-size: 8px; }
  .game-card.is-fullscreen .fullscreen-actions { width: 100%; justify-content: flex-end; }
  .game-card.is-fullscreen .stats { justify-content: space-evenly; }
  .game-card.is-fullscreen .restart-game-button, .game-card.is-fullscreen .exit-game-button { padding: 7px 9px; }
  .game-card.is-fullscreen .board { gap: 5px; }
  .game-card.is-fullscreen .card { border-radius: 7px; }
  .game-card.is-fullscreen .card-front { font-size: clamp(34px, 13vw, 68px); }
  .game-card.is-fullscreen .board.is-large .card-front { font-size: clamp(24px, 9vw, 48px); }
  .game-card.is-fullscreen .game-footer { font-size: 9px; }
  .game-card.is-fullscreen .win-message { inset: 128px 12px 48px; }
  .theme-dialog { width: calc(100% - 20px); border-radius: 12px; }
  .theme-dialog-content { padding: 18px 14px 14px; }
  .theme-description { margin-bottom: 12px; font-size: 12px; }
  .theme-options { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 7px; }
  .theme-option { min-height: 58px; gap: 8px; padding: 8px; }
  .theme-option-icon { width: 29px; height: 29px; font-size: 19px; }
  .theme-option-label { font-size: 11px; }
  .theme-note { font-size: 9px; }
  .theme-dialog-actions { padding-top: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}