@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

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

:root {
  --bg: #07090d;
  --panel: #0e1117;
  --panel-light: #141820;

  --border: rgba(255, 255, 255, 0.08);

  --text: #f5f7fa;
  --muted: #7f8999;

  --green: #35d07f;
  --blue: #5b8cff;
  --red: #ff5f5f;
  --yellow: #ffd166;
}

body {
  min-height: 100vh;

  background:
    radial-gradient(
      circle at 50% -10%,
      rgba(91, 140, 255, 0.12),
      transparent 35%
    ),
    var(--bg);

  color: var(--text);

  font-family: "Inter", sans-serif;

  display: flex;
  justify-content: center;

  padding: 28px 18px;
}

.app {
  width: 100%;
  max-width: 1000px;
}


/* =========================
   HEADER
========================= */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;

  padding-bottom: 28px;

  border-bottom: 1px solid var(--border);
}

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

.brand h1 {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.6px;
}

.brand p {
  margin-top: 3px;

  color: var(--muted);

  font-size: 11px;
  font-weight: 500;
}


/* Mini cube logo */

.cube-logo {
  width: 38px;
  height: 38px;

  display: grid;
  grid-template-columns: 1fr 1fr;

  gap: 2px;

  padding: 4px;

  background: #050608;

  border: 1px solid var(--border);
  border-radius: 9px;

  transform: rotate(-3deg);
}

.cube-logo span {
  border-radius: 2px;
}

.cube-logo span:nth-child(1) {
  background: #ff4444;
}

.cube-logo span:nth-child(2) {
  background: #ffd93d;
}

.cube-logo span:nth-child(3) {
  background: #4385ff;
}

.cube-logo span:nth-child(4) {
  background: #35d07f;
}


/* Keyboard */

.keyboard-hint {
  display: flex;
  align-items: center;
  gap: 9px;

  color: var(--muted);

  font-size: 11px;
}

kbd {
  min-width: 55px;

  padding: 7px 9px;

  text-align: center;

  color: #dce2ea;

  background: #171b23;

  border: 1px solid #2a303b;
  border-bottom: 3px solid #292e39;

  border-radius: 6px;

  font-family: inherit;
  font-size: 9px;
  font-weight: 800;

  box-shadow: 0 3px 0 #050608;
}


/* =========================
   SCRAMBLE
========================= */

.scramble-section {
  margin-top: 35px;
}

.section-label {
  display: flex;
  align-items: center;
  justify-content: space-between;

  margin-bottom: 13px;
}

.section-label span {
  color: var(--muted);

  font-size: 10px;
  font-weight: 800;

  letter-spacing: 1.8px;
}

#newScramble {
  border: none;

  color: var(--blue);

  background: transparent;

  font-family: inherit;
  font-size: 11px;
  font-weight: 600;

  cursor: pointer;

  transition: 0.2s;
}

#newScramble:hover {
  color: #8eafff;
}

.scramble {
  min-height: 82px;

  display: flex;
  align-items: center;
  justify-content: center;

  padding: 18px 25px;

  background: linear-gradient(
    135deg,
    rgba(255,255,255,0.035),
    rgba(255,255,255,0.015)
  );

  border: 1px solid var(--border);
  border-radius: 15px;

  color: #e8ecf2;

  font-size: clamp(15px, 2.2vw, 21px);
  font-weight: 600;

  letter-spacing: 0.7px;
  line-height: 1.7;

  text-align: center;

  user-select: none;
}


/* =========================
   TIMER
========================= */

.timer-section {
  min-height: 360px;

  display: flex;
  flex-direction: column;

  align-items: center;
  justify-content: center;

  text-align: center;
}

.timer {
  font-size: clamp(80px, 15vw, 150px);

  font-weight: 700;

  letter-spacing: -7px;

  line-height: 1;

  font-variant-numeric: tabular-nums;

  color: #f8fafc;

  user-select: none;

  transition:
    color 0.15s,
    transform 0.15s;
}

.timer.ready {
  color: var(--yellow);
}

.timer.running {
  color: white;
}

.timer.finished {
  color: var(--green);
}

.timer-status {
  margin-top: 22px;

  color: var(--muted);

  font-size: 12px;
  font-weight: 500;

  transition: 0.2s;
}

.timer-status.ready {
  color: var(--yellow);
}

.timer-status.running {
  color: var(--green);
}


/* =========================
   STATS
========================= */

.stats {
  display: grid;

  grid-template-columns:
    repeat(3, 1fr);

  gap: 12px;
}

.stat-card {
  padding: 20px;

  background: var(--panel);

  border: 1px solid var(--border);
  border-radius: 13px;
}

.stat-label {
  display: block;

  margin-bottom: 9px;

  color: var(--muted);

  font-size: 9px;
  font-weight: 800;

  letter-spacing: 1.5px;
}

.stat-card strong {
  font-size: 21px;
  font-weight: 700;

  font-variant-numeric: tabular-nums;
}


/* =========================
   HISTORY
========================= */

.history-section {
  margin-top: 35px;
}

.section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;

  margin-bottom: 12px;
}

.section-title h2 {
  font-size: 14px;
  font-weight: 700;
}

.clear-btn {
  border: none;

  color: var(--muted);

  background: transparent;

  font-family: inherit;
  font-size: 10px;
  font-weight: 600;

  cursor: pointer;
}

.clear-btn:hover {
  color: var(--red);
}

.history {
  overflow: hidden;

  background: var(--panel);

  border: 1px solid var(--border);
  border-radius: 13px;
}

.solve {
  display: grid;

  grid-template-columns:
    50px 120px 1fr;

  align-items: center;

  padding: 15px 18px;

  border-bottom: 1px solid var(--border);
}

.solve:last-child {
  border-bottom: none;
}

.solve-number {
  color: var(--muted);

  font-size: 11px;
}

.solve-time {
  font-size: 17px;
  font-weight: 700;

  font-variant-numeric: tabular-nums;
}

.solve-scramble {
  overflow: hidden;

  color: var(--muted);

  font-size: 10px;

  white-space: nowrap;
  text-overflow: ellipsis;
}

.empty-history {
  padding: 35px;

  color: var(--muted);

  text-align: center;

  font-size: 11px;
}


/* =========================
   FOOTER
========================= */

footer {
  display: flex;
  justify-content: space-between;

  margin-top: 28px;
  padding-top: 20px;

  color: #4d5665;

  border-top: 1px solid var(--border);

  font-size: 9px;
}


/* =========================
   RESPONSIVE
========================= */

@media (max-width: 650px) {

  body {
    padding: 18px 12px;
  }

  .topbar {
    padding-bottom: 20px;
  }

  .keyboard-hint span {
    display: none;
  }

  .timer-section {
    min-height: 300px;
  }

  .timer {
    letter-spacing: -5px;
  }

  .stats {
    gap: 8px;
  }

  .stat-card {
    padding: 15px;
  }

  .stat-card strong {
    font-size: 17px;
  }

  .solve {
    grid-template-columns:
      35px 85px 1fr;

    padding: 13px;
  }

  .solve-time {
    font-size: 15px;
  }

  footer {
    font-size: 8px;
  }
}


/* =========================
   TIMER FLASH
========================= */

@keyframes finishFlash {

  0% {
    transform: scale(1);
  }

  50% {
    transform: scale(1.025);
  }

  100% {
    transform: scale(1);
  }

}

.timer.finished {
  animation: finishFlash 0.35s ease;
}