@import url("https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;600;700&display=swap");
@import url("https://fonts.googleapis.com/css2?family=Press+Start+2P:wght@400&display=swap");

:root {
  --c0: #151b23;
  --c1: #033a16;
  --c2: #196c2e;
  --c3: #2ea043;
  --c4: #56d364;

  --c-unrevealed: #21262d;

  --c-hover: #30363d;
  --c-border: #30363d;
  --c-border-hover: #8b949e;

  --bg: #0d1117;
  --surface: #161b22;
  --surface2: #21262d;
  --text: #e6edf3;
  --text-muted: #8b949e;
  --accent: #197935;
  --accent-hover: #1c8139;
  --red: #d1242f;
  --red-bg: #2d1a1a;
  --blue: #58a6ff;

  --cell-size: 14px;
  --cell-gap: 3px;
  --cell-radius: 2px;
  --font: "JetBrains Mono", "Courier New", monospace;
}

.light-theme {
  --c0: #eff2f5;
  --c1: #aceebb;
  --c2: #4ac26b;
  --c3: #2da44e;
  --c4: #116329;

  --c-unrevealed: #e6edf3;

  --c-hover: #e0e7ef;
  --c-border: #d1d9e0;
  --c-border-hover: #6e7781;

  --bg: #f6f8fa;
  --surface: #fff;
  --surface2: #f6f8fa;
  --text: #24292f;
  --text-muted: #6e7781;
  --accent: #2da44e;
  --accent-hover: #218838;
  --red: #d1242f;
  --red-bg: #f8caca;
  --blue: #58a6ff;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  height: 100%;
}

body {
  min-height: 100%;
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 13px;
  display: flex;
  flex-direction: column;
  align-items: center;
  overflow-x: hidden;
  position: relative;
}

header {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 2.5rem 1rem 0.75rem;
}

#theme-toggle {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--c-border);
  border-radius: 6px;
  color: var(--text-muted);
  padding: 4px;
  cursor: pointer;
  display: flex;
  transition: all 0.2s;
}

#theme-toggle svg {
  width: 16px;
  height: 16px;
}

#theme-toggle:hover {
  background: var(--surface2);
  color: var(--text);
  border-color: var(--c-border-hover);
}

.logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  font-family: "Press Start 2P", system-ui;
  font-size: 1.8rem;
  letter-spacing: 0.04em;
  color: var(--text);
  margin-bottom: 0.3rem;
}

.tagline {
  color: var(--text-muted);
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  text-transform: lowercase;
}

main {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  padding: 1.5rem 1rem 2rem;
  width: 100%;
}

.controls {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.9rem;
  width: 100%;
}

.difficulty-selector {
  display: flex;
  gap: 0.4rem;
  background: var(--surface);
  border: 1px solid var(--c-border);
  border-radius: 6px;
  padding: 3px;
}

.diff-btn {
  background: transparent;
  border: none;
  border-radius: 4px;
  color: var(--text-muted);
  font-family: var(--font);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.3rem 0.85rem;
  cursor: pointer;
  transition:
    background 0.15s,
    color 0.15s;
  letter-spacing: 0.02em;
}

.diff-btn:hover {
  background: var(--surface2);
  color: var(--text);
}

.diff-btn.active {
  background: var(--accent);
  color: #fff;
}

.stats {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.stat-box {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  background: var(--surface);
  border: 1px solid var(--c-border);
  border-radius: 6px;
  padding: 0.35rem 0.75rem;
  min-width: 90px;
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.stat-icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.issue-icon {
  color: var(--red);
}

.timer-icon {
  color: var(--text-muted);
}

#reset-btn {
  background: var(--surface);
  border: 1px solid var(--c-border);
  border-radius: 6px;
  color: var(--text-muted);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition:
    background 0.15s,
    color 0.15s,
    border-color 0.15s;
}

#reset-btn:hover {
  background: var(--surface2);
  color: var(--text);
  border-color: var(--c-border-hover);
}

#reset-btn svg {
  transition: transform 0.3s ease;
}

#reset-btn:hover svg {
  transform: rotate(180deg);
}

.board-wrapper {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
  max-width: 100%;
  padding-bottom: 0.5rem;
}

.contrib-labels {
  display: flex;
  justify-content: space-between;
  width: 100%;
  padding: 0 2px;
  color: var(--text-muted);
  font-size: 0.7rem;
  pointer-events: none;
  user-select: none;
}

#board {
  display: grid;
  gap: var(--cell-gap);
}

.cell {
  width: var(--cell-size);
  height: var(--cell-size);
  border-radius: var(--cell-radius);
  background: var(--c-unrevealed);
  cursor: pointer;
  position: relative;
  transition:
    background 0.1s,
    transform 0.08s;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border: 1px solid transparent;
  user-select: none;
  -webkit-user-select: none;
}

.cell:hover:not(.revealed):not(.flagged) {
  background: var(--c-hover);
  border-color: var(--c-border-hover);
  transform: scale(1.15);
  z-index: 2;
}

.cell.revealed {
  cursor: default;
  animation: popIn 0.12s ease forwards;
}

.cell.revealed-0 {
  background: var(--c0);
}

.cell.revealed-1 {
  background: var(--c1);
}

.cell.revealed-2 {
  background: var(--c2);
}

.cell.revealed-3 {
  background: var(--c3);
}

.cell.revealed-4,
.cell.revealed-5,
.cell.revealed-6,
.cell.revealed-7,
.cell.revealed-8 {
  background: var(--c4);
}

@keyframes popIn {
  0% {
    transform: scale(0.6);
    opacity: 0.4;
  }

  60% {
    transform: scale(1.08);
  }

  100% {
    transform: scale(1);
    opacity: 1;
  }
}

.cell.flagged {
  background: var(--c0);
  border-color: var(--blue);
}

.cell.mine-revealed {
  background: var(--red-bg) !important;
  animation: shake 0.3s ease;
}

.cell.mine-exploded {
  background: var(--red) !important;
}

@keyframes shake {
  0%,
  100% {
    transform: translate(0, 0);
  }

  25% {
    transform: translate(-2px, 1px);
  }

  75% {
    transform: translate(2px, -1px);
  }
}

.cell.wrong-flag {
  background: var(--red-bg) !important;
  border: none !important;
}

.cell-icon {
  width: 10px;
  height: 10px;
  pointer-events: none;
  flex-shrink: 0;
}

.legend {
  display: flex;
  align-items: center;
  gap: 4px;
  color: var(--text-muted);
  font-size: 0.72rem;
}

.legend-cell {
  width: 11px;
  height: 11px;
  border-radius: 2px;
  display: inline-block;
}

.legend-label {
  margin: 0 2px;
}

.message-overlay {
  position: fixed;
  inset: 0;
  background: #0d111799;
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  animation: fadeIn 0.2s ease;
}

.message-overlay.hidden {
  display: none;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

.message-box {
  background: var(--surface);
  border: 1px solid var(--c-border);
  border-radius: 12px;
  padding: 2.5rem 3rem;
  text-align: center;
  max-width: 340px;
  width: 90%;
  animation: slideUp 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes slideUp {
  from {
    transform: translateY(30px) scale(0.95);
    opacity: 0;
  }

  to {
    transform: translateY(0) scale(1);
    opacity: 1;
  }
}

.message-box h2 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-top: 0.4rem;
  margin-bottom: 0.4rem;
}

.message-box p {
  color: var(--text-muted);
  font-size: 0.82rem;
  margin-bottom: 1.5rem;
  line-height: 1.5;
}

#msg-btn {
  background: var(--accent);
  border: none;
  border-radius: 6px;
  color: #fff;
  font-family: var(--font);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.5rem 1.5rem;
  cursor: pointer;
  transition: background 0.15s;
  letter-spacing: 0.02em;
}

#msg-btn:hover {
  background: var(--accent-hover);
}

footer {
  position: relative;
  z-index: -1;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.72rem;
  padding: 0.5rem 1rem 2rem;
  letter-spacing: 0.02em;
}

@media (max-width: 480px) {
  .logo {
    font-size: 1.1rem;
  }
  .diff-btn {
    padding: 0.2rem 0.6rem;
    font-size: 0.73rem;
  }
  .stat-box {
    min-width: 73px;
    font-size: 0.9rem;
  }
}