:root {
  color-scheme: light;
  --bg: #f4f7fb;
  --panel: #ffffff;
  --text: #172033;
  --muted: #607089;
  --line: #d8e0ec;
  --accent: #0f766e;
  --accent-strong: #115e59;
  --key: #f9fbfd;
  --key-active: #dff7f4;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
}

button,
input {
  font: inherit;
}

.back-link {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  margin-bottom: 18px;
  color: var(--accent);
  font-weight: 700;
  text-decoration: none;
}

.back-link:hover,
.back-link:focus-visible {
  color: var(--accent-strong);
  outline: none;
  text-decoration: underline;
}

.app {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.app--home {
  align-items: center;
}

.panel {
  width: min(920px, 100%);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: clamp(20px, 4vw, 40px);
  box-shadow: 0 20px 55px rgba(22, 32, 51, 0.09);
}

.home-panel {
  width: min(720px, 100%);
}

.header {
  display: grid;
  gap: 8px;
  margin-bottom: 28px;
}

.home-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.home-link {
  display: grid;
  gap: 8px;
  min-height: 132px;
  align-content: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--key);
  padding: 22px;
  text-decoration: none;
  transition: background 120ms ease, border-color 120ms ease, transform 120ms ease;
}

.home-link:hover,
.home-link:focus-visible {
  border-color: var(--accent);
  background: var(--key-active);
  outline: none;
  transform: translateY(-1px);
}

.home-link__title {
  color: var(--text);
  font-size: 1.25rem;
  font-weight: 800;
}

.home-link__meta {
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 600;
}

.label {
  margin: 0;
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 4.5rem);
  line-height: 1;
  letter-spacing: 0;
}

.controls {
  display: grid;
  grid-template-columns: max-content 1fr 4ch;
  align-items: center;
  gap: 14px;
  margin-bottom: 24px;
  color: var(--muted);
  font-weight: 600;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}

.keyboard {
  display: grid;
  grid-template-columns: repeat(10, minmax(0, 1fr));
  gap: 8px;
}

.key {
  min-height: 56px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--key);
  color: var(--text);
  font-weight: 750;
  cursor: pointer;
  transition: background 120ms ease, border-color 120ms ease, transform 120ms ease;
}

.key:hover,
.key:focus-visible {
  border-color: var(--accent);
  outline: none;
}

.key.is-active {
  background: var(--key-active);
  border-color: var(--accent);
  color: var(--accent-strong);
  transform: translateY(1px);
}

.status {
  min-height: 24px;
  margin: 24px 0 0;
  color: var(--muted);
}

.hit-value {
  display: block;
  min-height: 88px;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfe;
  color: var(--text);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: clamp(2rem, 8vw, 4.5rem);
  font-weight: 800;
  line-height: 86px;
  text-align: center;
}

.input-log {
  display: grid;
  gap: 8px;
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.input-log__label {
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 700;
}

.input-log__value {
  min-height: 44px;
  width: 100%;
  overflow: hidden;
  white-space: nowrap;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfe;
  color: var(--text);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 1rem;
  line-height: 42px;
  padding: 0 12px;
}

@media (max-width: 640px) {
  .app {
    padding: 14px;
  }

  .controls {
    grid-template-columns: 1fr 4ch;
  }

  .controls label {
    grid-column: 1 / -1;
  }

  .keyboard {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .home-nav {
    grid-template-columns: 1fr;
  }
}