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

html {
  overflow: hidden;
  height: 100%;
}

:root {
  --bg: #0a0a0a;
  --surface: #111111;
  --border: rgba(255, 255, 255, 0.08);
  --white: #ffffff;
  --muted: rgba(255, 255, 255, 0.35);
  --accent: #e8e8e8;
  --mono-bg: rgba(255, 255, 255, 0.06);
  --mono-line: rgba(255, 255, 255, 0.25);
}

body {
  font-family:
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  background-color: var(--bg);
  color: var(--white);
  background-image: radial-gradient(
    circle,
    rgba(255, 255, 255, 0.04) 1px,
    transparent 1px
  );
  background-size: 28px 28px;
  height: 100%;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1.5rem;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(
    ellipse at center,
    transparent 25%,
    rgba(0, 0, 0, 0.6) 100%
  );
  z-index: 0;
}

main {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 480px;
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-up {
  animation: fade-up 0.7s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 3rem;
}

.badge-line {
  width: 24px;
  height: 1px;
  background: var(--muted);
}

.badge-text {
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: var(--muted);
}

h1 {
  font-size: clamp(1.8rem, 5vw, 2.6rem);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: -0.03em;
  color: var(--accent);
  margin-bottom: 2.5rem;
}

h1 em {
  font-style: normal;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.38);
}

.word-engineer {
  font-family: ui-monospace, "SF Mono", "Cascadia Code", "Consolas", monospace;
  font-size: 0.87em;
  font-weight: 400;
  letter-spacing: -0.01em;
  color: rgba(255, 255, 255, 0.58);
  background: var(--mono-bg);
  padding: 2px 7px 3px;
  border-radius: 4px;
  text-decoration: underline;
  text-decoration-color: var(--mono-line);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.divider {
  width: 100%;
  height: 1px;
  background: var(--border);
  margin-bottom: 1.75rem;
}

.btn-row {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 1rem 1.25rem;
  text-decoration: none;
  border: 1px solid transparent;
  transition:
    background 0.2s ease,
    border-color 0.2s ease,
    transform 0.18s ease,
    box-shadow 0.18s ease;
}

.btn-label {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.btn-icon {
  width: 17px;
  height: 17px;
  flex-shrink: 0;
  transition:
    transform 0.2s ease,
    opacity 0.2s ease;
  opacity: 0.7;
}

.btn-primary {
  background: var(--white);
  color: #0a0a0a;
  border-color: var(--white);
}
.btn-primary .btn-icon {
  opacity: 1;
}
.btn-primary:hover {
  background: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(255, 255, 255, 0.09);
}
.btn-primary:hover .btn-icon {
  transform: rotate(8deg);
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: none;
}

.btn-secondary {
  background: transparent;
  color: var(--white);
  border-color: var(--border);
}
.btn-secondary:hover {
  background: var(--surface);
  border-color: rgba(255, 255, 255, 0.18);
  transform: translateY(-2px);
}
.btn-secondary:hover .btn-icon {
  transform: scale(1.1);
  opacity: 1;
}
.btn-secondary:active {
  transform: translateY(0);
}

footer {
  margin-top: 2.75rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 8px;
  font-weight: 500;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.16);
  border-top: 1px solid var(--border);
  padding-top: 1.1rem;
}

::selection {
  background: rgba(255, 255, 255, 0.15);
  color: var(--white);
}