@import url("https://fonts.googleapis.com/css2?family=Black+Ops+One&family=M+PLUS+1+Code:wght@100..700&family=M+PLUS+1:wght@100..900&display=swap");

:root {
  --bg-color: #050505;
  --text-main: #e0e0e0;
  --text-muted: #555555;
  --accent: #00ff66;
  --accent-warn: #ffb300;
  --font-stack: "M PLUS 1 Code", monospace;
}

.material-symbols-outlined {
  font-variation-settings:
    "FILL" 0,
    "wght" 200,
    "GRAD" 0,
    "opsz" 24;
}

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

body {
  background-color: var(--bg-color);
  color: var(--text-main);
  font-family: var(--font-stack);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 100vh;
  padding: 2rem;
  overflow-x: hidden;
}

header {
  letter-spacing: -0.02em;
  padding-inline: 0.5rem;
  border-bottom: 1px solid #111;
  padding-bottom: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

header .title h1 {
  font-family: "Black Ops One";
}

header .version {
  font-size: 0.89rem;
  color: var(--text-muted);
  font-family: var(--font-stack);
}

header .configs {
  display: flex;
  align-items: center;
  gap: 2rem;
  justify-content: center;
}

header .configs span {
  cursor: pointer;
}

header p {
  font-size: smaller;
}

.system-status {
  color: var(--text-muted);
}

main {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  margin-bottom: 1rem;
}

.display-container {
  margin-bottom: 2rem;
}

.speed-number {
  font-size: 8.5rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--text-main);
  transition: color 0.2s ease;
  font-family: "M PLUS 1";
}

.speed-number.active {
  color: var(--accent);
}

.speed-unit {
  font-size: 1.25rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
  /* text-transform: uppercase; */
  letter-spacing: 0.1em;
}

button {
  background: transparent;
  border: 1px solid #222;
  color: var(--text-main);
  font-family: var(--font-stack);
  padding: 0.75rem 2rem;
  font-size: 0.9rem;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: all 0.15s ease;
}

button:hover {
  background: #111;
  border-color: var(--accent);
  color: var(--accent);
}

button:disabled {
  border-color: #111;
  color: var(--text-muted);
  background: transparent;
  cursor: not-allowed;
}

section.diagnostics {
  width: 100%;
  max-width: 600px;
  margin: 0 auto;
}

.diagnostics-toggle {
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
  cursor: pointer;
  text-transform: uppercase;
  margin-bottom: 1rem;
  user-select: none;
}

.diagnostics-toggle:hover {
  color: var(--text-main);
}

.diagnostics-panel {
  background: #090909;
  border: 1px solid #111;
  padding: 1rem;
  font-size: 0.8rem;
  display: none;
  font-family: "M Plus 1";
}

.diagnostics-panel.visible {
  display: block;
}

.data-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.4rem;
}

.data-row:last-child {
  margin-bottom: 0;
}

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

.value {
  color: var(--text-main);
}

.value.highlight {
  color: var(--accent);
}

.controls:has(div.loader) {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  justify-content: center;
  align-items: center;
}

.loader {
  width: 130px;
  height: 20px;
  background: linear-gradient(#ddd 0 0) 0/0% no-repeat #000;
  animation: l1 2s infinite linear;
}
@keyframes l1 {
  100% {
    background-size: 100%;
  }
}

footer {
  width: 100%;
  max-width: 600px;
  margin: 4rem auto 0 auto;
  padding-top: 1rem;
  border-top: 1px solid #111;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  color: var(--text-muted);
}

footer .footer-left {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.footer-left a {
  font-weight: bold;
}

footer a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.15s ease;
}

footer a:hover {
  color: var(--accent);
}

footer .footer-right {
  display: flex;
  gap: 0.5rem;
}

footer .separator {
  color: #1a1a1a;
  user-select: none;
}

@media (width < 660px) {
  footer {
    flex-direction: column;
    gap: 10px;
  }
}

@media (width < 475px) {
  .title h1 {
    font-size: 1.4rem;
  }

  .title p {
    font-size: smaller;
  }

  .configs .system-status {
    display: none;
  }

  .speed-number {
    font-size: 4rem;
  }

  footer {
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
    font-size: smaller;
  }

  .footer-left span:nth-of-type(2) {
    display: none;
  }
}

@media (width < 375px) {
  .speed-number {
    font-size: 3rem;
  }

  .title p {
    font-size: x-small;
  }

  .diagnostics-panel {
    font-size: x-small;
  }
}