@import url('https://fonts.googleapis.com/css2?family=Chakra+Petch:wght@400;600;700&family=Inter:wght@400;600;700&display=swap');

:root {
  --bg: #080a12;
  --panel: #111522;
  --panel-soft: rgba(17, 21, 34, 0.88);
  --cell: #252c43;
  --cell-top: #303954;
  --cell-open: #101522;
  --text: #f4f6ff;
  --muted: #adb6d1;
  --line: rgba(255, 255, 255, 0.14);
  --cyan: #56efff;
  --pink: #ff5fd2;
  --yellow: #ffe268;
  --green: #75ff9b;
  --danger: #ff647c;
  --cell-size: 34px;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--bg);
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at 12% 12%, rgba(86, 239, 255, 0.12), transparent 30rem),
    radial-gradient(circle at 88% 12%, rgba(255, 95, 210, 0.11), transparent 28rem),
    linear-gradient(180deg, #090b14, #0b1020 56%, #07090f);
  font-family: Inter, system-ui, sans-serif;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  opacity: 0.14;
  background-image:
    linear-gradient(rgba(86, 239, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(86, 239, 255, 0.08) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(to bottom, black, transparent 82%);
}

button,
select {
  font: inherit;
}

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

.scanlines {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 30;
  opacity: 0.035;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0,
    transparent 3px,
    #fff 4px
  );
}

.game-header {
  width: min(calc(100% - 32px), 1380px);
  min-height: 76px;
  margin-inline: auto;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 18px;
  border-bottom: 1px solid var(--line);
}

.back-link,
.header-button {
  color: var(--muted);
  text-decoration: none;
  font: 700 0.82rem "Chakra Petch", sans-serif;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.back-link {
  justify-self: start;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.back-link:hover,
.back-link:focus-visible {
  color: var(--cyan);
}

.game-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font: 700 1rem "Chakra Petch", sans-serif;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(86, 239, 255, 0.7);
  color: var(--text);
  background: rgba(86, 239, 255, 0.07);
}

.header-button {
  justify-self: end;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.03);
  cursor: pointer;
}

.header-button:hover,
.header-button:focus-visible {
  color: var(--cyan);
  border-color: rgba(86, 239, 255, 0.5);
}

.game-shell {
  width: min(calc(100% - 32px), 1380px);
  margin: 0 auto;
  padding: 52px 0 90px;
}

.intro-panel {
  margin-bottom: 30px;
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 34px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--cyan);
  font: 700 0.76rem "Chakra Petch", sans-serif;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

h1,
h2 {
  margin-top: 0;
  font-family: "Chakra Petch", sans-serif;
  text-transform: uppercase;
}

h1 {
  margin-bottom: 10px;
  font-size: clamp(3.2rem, 8vw, 6.4rem);
  line-height: 0.9;
  letter-spacing: -0.055em;
}

.intro-copy {
  max-width: 690px;
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.control-help {
  flex: 0 0 auto;
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-size: 0.85rem;
  text-align: right;
}

.control-help strong {
  color: var(--text);
}

.machine {
  overflow: hidden;
  border: 1px solid rgba(86, 239, 255, 0.25);
  border-radius: 10px;
  background: var(--panel-soft);
  box-shadow:
    0 28px 90px rgba(0, 0, 0, 0.42),
    0 0 50px rgba(86, 239, 255, 0.05);
}

.machine-top {
  padding: 20px;
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid var(--line);
}

.difficulty-wrap {
  min-width: min(100%, 320px);
  display: grid;
  gap: 7px;
}

.difficulty-wrap label,
.readout-label {
  color: var(--muted);
  font: 700 0.68rem "Chakra Petch", sans-serif;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

select {
  width: 100%;
  min-height: 44px;
  padding: 0 40px 0 12px;
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 3px;
  background: #151a2a;
}

.readouts {
  display: flex;
  gap: 10px;
}

.readout {
  min-width: 92px;
  padding: 8px 12px;
  display: grid;
  gap: 2px;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: #080b12;
}

.readout strong {
  color: var(--pink);
  font: 700 1.55rem "Chakra Petch", monospace;
  letter-spacing: 0.08em;
  text-shadow: 0 0 14px rgba(255, 95, 210, 0.28);
}

.machine-controls {
  padding: 14px 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  border-bottom: 1px solid var(--line);
}

.control-button {
  min-height: 42px;
  padding: 0 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.035);
  font: 700 0.78rem "Chakra Petch", sans-serif;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
  cursor: pointer;
}

.control-button:hover,
.control-button:focus-visible {
  border-color: rgba(86, 239, 255, 0.56);
}

.flag-button[aria-pressed="true"] {
  color: #071015;
  border-color: var(--yellow);
  background: var(--yellow);
}

.status-line {
  padding: 12px 20px;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
  font: 600 0.84rem "Chakra Petch", sans-serif;
  letter-spacing: 0.03em;
}

.board-frame {
  overflow: auto;
  padding: clamp(14px, 3vw, 32px);
  overscroll-behavior: contain;
}

.board {
  width: max-content;
  min-width: min-content;
  margin: 0 auto;
  display: grid;
  gap: 2px;
  padding: 5px;
  border: 1px solid rgba(86, 239, 255, 0.16);
  background: #070a11;
  box-shadow: inset 0 0 30px rgba(0, 0, 0, 0.5);
  touch-action: manipulation;
  user-select: none;
}

.cell {
  width: var(--cell-size);
  height: var(--cell-size);
  padding: 0;
  display: grid;
  place-items: center;
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-top-color: rgba(255, 255, 255, 0.25);
  border-left-color: rgba(255, 255, 255, 0.2);
  border-radius: 2px;
  background: linear-gradient(145deg, var(--cell-top), var(--cell));
  font: 700 1rem "Chakra Petch", monospace;
  cursor: pointer;
}

.cell:hover:not(.revealed),
.cell:focus-visible:not(.revealed) {
  outline: none;
  border-color: var(--cyan);
  box-shadow: inset 0 0 12px rgba(86, 239, 255, 0.15);
}

.cell.revealed {
  border-color: rgba(255, 255, 255, 0.055);
  background: var(--cell-open);
  cursor: default;
}

.cell.flagged {
  color: var(--yellow);
  text-shadow: 0 0 12px rgba(255, 226, 104, 0.34);
}

.cell.mine {
  color: var(--danger);
  background: rgba(255, 100, 124, 0.12);
}

.cell.exploded {
  color: #090b12;
  border-color: var(--danger);
  background: var(--danger);
}

.cell[data-number="1"] { color: #71cfff; }
.cell[data-number="2"] { color: #75ff9b; }
.cell[data-number="3"] { color: #ff7b91; }
.cell[data-number="4"] { color: #a98aff; }
.cell[data-number="5"] { color: #ffad69; }
.cell[data-number="6"] { color: #58f4df; }
.cell[data-number="7"] { color: #f7f7ff; }
.cell[data-number="8"] { color: #9aa3be; }

.result-dialog {
  position: fixed;
  inset: 0;
  z-index: 25;
  padding: 20px;
  display: grid;
  place-items: center;
  background: rgba(3, 5, 10, 0.82);
  backdrop-filter: blur(8px);
}

.result-dialog[hidden] {
  display: none;
}

.result-card {
  width: min(100%, 480px);
  padding: 34px;
  border: 1px solid rgba(86, 239, 255, 0.45);
  border-radius: 8px;
  background: #111522;
  box-shadow: 0 28px 100px rgba(0, 0, 0, 0.62);
  text-align: center;
}

.result-card h2 {
  margin-bottom: 12px;
  font-size: clamp(2.2rem, 8vw, 4rem);
  line-height: 0.95;
}

.result-card > p:not(.eyebrow) {
  color: var(--muted);
  line-height: 1.65;
}

.result-actions {
  margin-top: 24px;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
}

.primary-control {
  color: #071015;
  border-color: var(--cyan);
  background: var(--cyan);
}

.link-control {
  color: var(--text);
}

@media (max-width: 760px) {
  :root {
    --cell-size: 31px;
  }

  .game-header {
    grid-template-columns: 1fr auto;
  }

  .game-brand {
    display: none;
  }

  .intro-panel {
    align-items: start;
    flex-direction: column;
  }

  .control-help {
    text-align: left;
  }

  .machine-top {
    align-items: stretch;
    flex-direction: column;
  }

  .readouts {
    width: 100%;
  }

  .readout {
    min-width: 0;
    flex: 1;
  }
}

@media (max-width: 480px) {
  :root {
    --cell-size: 29px;
  }

  .game-shell {
    width: min(calc(100% - 20px), 1380px);
    padding-top: 36px;
  }

  .game-header {
    width: min(calc(100% - 20px), 1380px);
  }

  .header-button {
    padding-inline: 9px;
    font-size: 0.7rem;
  }

  .readout {
    padding-inline: 8px;
  }

  .readout strong {
    font-size: 1.2rem;
  }

  .machine-controls {
    display: grid;
    grid-template-columns: 1fr 1.35fr;
  }

  .control-button {
    padding-inline: 10px;
    font-size: 0.68rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}