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

:root {
  --bg: #f9fafb;
  --surface: #ffffff;
  --text: #111827;
  --text-muted: #6b7280;
  --border: #e5e7eb;
  --accent: #07c4ff;
  --accent-dark: #069dd4;
  --badge-bg: rgba(7, 196, 255, 0.12);
  --badge-text: #066a8a;
  --badge-border: rgba(7, 196, 255, 0.3);
  --btn-bg: #111827;
  --btn-text: #ffffff;
  --btn-hover: #1f2937;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111827;
    --surface: #1f2937;
    --text: #f9fafb;
    --text-muted: #9ca3af;
    --border: #374151;
    --badge-bg: rgba(7, 196, 255, 0.1);
    --badge-text: #07c4ff;
    --badge-border: rgba(7, 196, 255, 0.25);
    --btn-bg: #07c4ff;
    --btn-text: #111827;
    --btn-hover: #a0d8ef;
  }
}

html, body {
  height: 100%;
}

body {
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  -webkit-font-smoothing: antialiased;
}

.container {
  text-align: center;
  max-width: 400px;
  width: 100%;
}

.logo {
  width: 280px;
  max-width: 100%;
  height: auto;
  margin-bottom: 2rem;
}

.badge {
  display: inline-block;
  padding: 0.375rem 1rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--badge-text);
  background: var(--badge-bg);
  border: 1px solid var(--badge-border);
  border-radius: 9999px;
  margin-bottom: 2.5rem;
}

.beta-sash {
  position: fixed;
  top: 0;
  right: 0;
  width: 128px;
  height: 128px;
  overflow: hidden;
  pointer-events: none;
  z-index: 9999;
}

.beta-sash span {
  position: absolute;
  top: 26px;
  right: -34px;
  width: 170px;
  text-align: center;
  transform: rotate(45deg);
  background: #f59e0b;
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.login-btn {
  display: inline-block;
  padding: 0.75rem 2.5rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--btn-text);
  background: var(--btn-bg);
  border: none;
  border-radius: 0.5rem;
  text-decoration: none;
  transition: background 0.15s ease;
  cursor: pointer;
}

.login-btn:hover {
  background: var(--btn-hover);
}

.login-btn:active {
  transform: scale(0.98);
}