:root {
  --bg: #0f0f12;
  --bg-elevated: #18181c;
  --text: #e8e8ec;
  --text-muted: #8b8b95;
  --accent: #22c55e;
  --accent-dim: #16a34a;
  --border: #2a2a30;
  --success: #3d9d6b;
  --font-sans: "DM Sans", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", monospace;
  --radius: 12px;
  --radius-sm: 8px;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
  display: flex;
  flex-direction: column;
}

.header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--text);
  font-weight: 600;
  font-size: 1.1rem;
}

.logo-icon {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--accent);
  background: rgba(34, 197, 94, 0.12);
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
}

main {
  flex: 1;
  max-width: 640px;
  margin: 0 auto;
  padding: 3rem 1.5rem 4rem;
  width: 100%;
}

.hero {
  text-align: center;
}

.hero-badge {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1.25rem;
  padding: 0.35rem 0.75rem;
  background: rgba(232, 168, 54, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.25);
  border-radius: 999px;
}

.hero-title {
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.hero-title em {
  font-style: normal;
  color: var(--accent);
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  max-width: 32ch;
  margin-left: auto;
  margin-right: auto;
}

.signup-form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-width: 360px;
  margin: 0 auto 0.5rem;
}

.signup-input {
  font-family: var(--font-sans);
  font-size: 1rem;
  padding: 0.9rem 1.25rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.signup-input::placeholder {
  color: var(--text-muted);
}

.signup-input:hover {
  border-color: #3a3a42;
}

.signup-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.15);
}

.signup-btn {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  padding: 0.9rem 1.5rem;
  background: var(--accent);
  color: #0f0f12;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
}

.signup-btn:hover {
  background: var(--accent-dim);
}

.signup-btn:active {
  transform: scale(0.99);
}

.form-note {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.features {
  margin-top: 3.5rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--border);
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 540px) {
  .features {
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
  }
}

.feature {
  text-align: center;
  padding: 1.25rem;
  background: var(--bg-elevated);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.feature-icon {
  font-size: 1.75rem;
  display: block;
  margin-bottom: 0.75rem;
}

.feature h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.feature p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer {
  padding: 1.5rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
}

.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  padding: 0.9rem 1.5rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.95rem;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
  opacity: 0;
  visibility: hidden;
  transition: transform 0.3s, opacity 0.3s, visibility 0.3s;
  z-index: 1000;
}

.toast.visible {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
  visibility: visible;
}

.toast.success {
  border-color: var(--success);
  color: var(--success);
}