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

:root {
  --bg: #1a1a1a;
  --bg2: #222;
  --bg3: #2a2a2a;
  --text: #f8f8f2;
  --text2: #b0b0b0;
  --muted: #6272a4;
  --accent: #bd93f9;
  --accent-hover: #cdb4fc;
  --accent-dim: #bd93f926;
  --cta: #50fa7b;
  --cta-hover: #3de06a;
  --cta-text: #1a1a1a;
  --error: #f55;
  --secondary: #ff79c6;
  --tertiary: #8be9fd;
  --border: #ffffff14;
  --border-accent: #bd93f940;
  --input-bg: #222;
  --input-border: #ffffff1f;
  --input-focus: #bd93f9;
  --glass: #ffffff08;
}

html:not(.dark) {
  --bg: #fafafa;
  --bg2: #f0f0f0;
  --bg3: #e8e8e8;
  --text: #1a1a1a;
  --text2: #444;
  --muted: #888;
  --accent: #7c5cbf;
  --accent-hover: #6a3fa0;
  --accent-dim: #7c5cbf1a;
  --cta: #2ecc71;
  --cta-hover: #27ae60;
  --cta-text: #fff;
  --error: #e74c3c;
  --secondary: #d63384;
  --tertiary: #0891b2;
  --border: #e0e0e0;
  --border-accent: #7c5cbf4d;
  --input-bg: #fff;
  --input-border: #ccc;
  --input-focus: #7c5cbf;
  --glass: #00000005;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  font-family: Inter, -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.6;
  transition: background .3s, color .3s;
}

.theme-toggle {
  z-index: 100;
  background: var(--bg2);
  border: 1px solid var(--border);
  cursor: pointer;
  color: var(--muted);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  border-radius: 20px;
  padding: 6px 14px;
  font-family: Inter, sans-serif;
  font-size: .65rem;
  font-weight: 500;
  transition: all .3s;
  position: fixed;
  top: 16px;
  right: 16px;
}

.theme-toggle:hover {
  color: var(--text);
  border-color: var(--border-accent);
}

.brand {
  z-index: 100;
  letter-spacing: .05em;
  color: var(--text);
  opacity: .4;
  font-family: Inter, sans-serif;
  font-size: .7rem;
  font-weight: 600;
  text-decoration: none;
  position: fixed;
  top: 18px;
  left: 20px;
}

.brand:hover {
  opacity: .7;
}

.footer {
  text-align: center;
  border-top: 1px solid var(--border);
  padding: 40px 24px;
}

.footer p {
  color: var(--muted);
  font-size: .7rem;
  line-height: 2;
}

.footer a {
  color: var(--muted);
  text-decoration: underline;
}

.disclaimer {
  color: var(--muted);
  text-align: center;
  opacity: .7;
  max-width: 560px;
  margin: 36px auto 0;
  font-size: .65rem;
  line-height: 1.6;
}

.cta-btn {
  text-transform: uppercase;
  letter-spacing: .15em;
  color: var(--cta-text);
  background: var(--cta);
  cursor: pointer;
  border: none;
  border-radius: 10px;
  padding: 18px 48px;
  font-family: Inter, sans-serif;
  font-size: 1rem;
  font-weight: 700;
  text-decoration: none;
  transition: all .2s;
  display: inline-block;
}

.cta-btn:hover {
  background: var(--cta-hover);
  transform: translateY(-1px);
}

.cta-btn:active {
  transform: translateY(0);
}

.cta-btn--full {
  text-align: center;
  width: 100%;
}

.page-center {
  text-align: center;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  max-width: 720px;
  min-height: 100vh;
  margin: 0 auto;
  padding: 60px 24px 40px;
  display: flex;
}

.card {
  background: var(--bg2);
  border: 1px solid var(--border);
  text-align: left;
  border-radius: 12px;
  width: 100%;
  max-width: 480px;
  padding: 28px 32px;
}

.card-accent {
  background: var(--accent-dim);
  border: 1px solid var(--border-accent);
  text-align: center;
  border-radius: 12px;
  width: 100%;
  max-width: 480px;
  padding: 24px 28px;
}

@media (width <= 640px) {
  .page-center {
    justify-content: flex-start;
    padding: 50px 20px 32px;
  }

  .cta-btn {
    padding: 16px 20px;
    font-size: .9rem;
  }

  .brand {
    display: none;
  }
}