/* ===== Reset & Base ===== */

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

:root {
  --color-bg: #fafafa;
  --color-text: #1a1a2e;
  --color-muted: #64648c;
  --color-accent: #2d2d4e;
  --color-border: #d4d4e0;
  --color-input-bg: #ffffff;
  --color-success: #2e7d5b;
  --color-error: #b33a3a;
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --max-width: 640px;
}

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

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

/* ===== Layout ===== */

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

main {
  flex: 1;
}

/* ===== Nav ===== */

.nav {
  padding: 2rem 0;
}

.wordmark {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--color-accent);
  text-transform: uppercase;
}

/* ===== Hero ===== */

.hero {
  padding: 6rem 0 4rem;
  text-align: center;
}

.hero__label {
  font-size: 0.8125rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-muted);
  margin-bottom: 1.5rem;
}

.hero__tagline {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--color-text);
  margin-bottom: 1.25rem;
}

.hero__description {
  font-size: 1.125rem;
  color: var(--color-muted);
  max-width: 480px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ===== Email Signup ===== */

.signup {
  padding: 2rem 0 6rem;
  text-align: center;
}

.signup__heading {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.signup__subtext {
  font-size: 0.9375rem;
  color: var(--color-muted);
  margin-bottom: 1.75rem;
}

.signup__form {
  max-width: 440px;
  margin: 0 auto;
}

.signup__input-group {
  display: flex;
  gap: 0.5rem;
}

.signup__input {
  flex: 1;
  padding: 0.75rem 1rem;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  color: var(--color-text);
  background: var(--color-input-bg);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  outline: none;
  transition: border-color 0.2s;
}

.signup__input::placeholder {
  color: #a0a0b8;
}

.signup__input:focus {
  border-color: var(--color-accent);
}

.signup__button {
  padding: 0.75rem 1.5rem;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 500;
  color: #ffffff;
  background-color: var(--color-accent);
  border: none;
  border-radius: 6px;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color 0.2s, opacity 0.2s;
}

.signup__button--link {
  display: inline-block;
  text-decoration: none;
}

.signup__button:hover {
  background-color: #1a1a36;
}

.signup__button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.signup__feedback {
  margin-top: 0.75rem;
  font-size: 0.875rem;
  min-height: 1.25rem;
}

.signup__feedback--success {
  color: var(--color-success);
}

.signup__feedback--error {
  color: var(--color-error);
}

/* ===== Footer ===== */

.footer {
  padding: 2rem 0;
  text-align: center;
  border-top: 1px solid var(--color-border);
}

.footer p {
  font-size: 0.8125rem;
  color: var(--color-muted);
}

/* ===== Responsive ===== */

@media (max-width: 480px) {
  .hero {
    padding: 4rem 0 3rem;
  }

  .signup__input-group {
    flex-direction: column;
  }

  .signup__button {
    width: 100%;
  }
}