@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;600&display=swap");

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

:root {
  --bg: #f8f4ee;
  --bg-accent: #fff3dc;
  --ink: #141414;
  --muted: #5a5a5a;
  --accent: #1f6feb;
  --accent-dark: #174ea6;
  --border: #e5dfd4;
  --card-bg: #ffffff;
  --success: #15803d;
  --error: #b91c1c;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f0f0f;
    --bg-accent: #1a1a1a;
    --ink: #f0f0f0;
    --muted: #a0a0a0;
    --accent: #4d9cff;
    --accent-dark: #2d7fe0;
    --border: #2a2a2a;
    --card-bg: #1c1c1c;
    --success: #4ade80;
    --error: #f87171;
  }
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Inter", "Segoe UI", sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at top, var(--bg-accent), var(--bg));
  display: grid;
  place-items: center;
  padding: 24px;
}

.container {
  width: min(420px, 100%);
  text-align: center;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 32px 28px;
  box-shadow: 0 20px 60px rgba(20, 20, 20, 0.1);
}

.logo {
  width: min(280px, 80%);
  margin-bottom: 20px;
  border: none;
}

h1 {
  margin: 0 0 8px;
  font-size: 32px;
  letter-spacing: 0.02em;
}

.tagline {
  margin: 0 0 24px;
  color: var(--muted);
  font-size: 16px;
}

.signup {
  display: flex;
  gap: 10px;
}

input[type="email"] {
  flex: 1;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--card-bg);
  color: var(--ink);
  font-size: 16px;
  font-family: inherit;
}

input[type="email"]::placeholder {
  color: var(--muted);
}

input[type="email"]:focus {
  outline: 2px solid rgba(31, 111, 235, 0.2);
  border-color: var(--accent);
}

button {
  border: none;
  border-radius: 10px;
  background: var(--accent);
  color: #ffffff;
  padding: 12px 16px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease;
}

button:hover {
  background: var(--accent-dark);
  transform: translateY(-1px);
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.message {
  margin: 16px 0 0;
  min-height: 20px;
  font-size: 14px;
}

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

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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

@media (max-width: 520px) {
  body {
    padding: 16px;
  }

  .container {
    padding: 24px 20px;
    border-radius: 16px;
  }

  .logo {
    width: min(220px, 70%);
    margin-bottom: 16px;
  }

  h1 {
    font-size: 24px;
  }

  .tagline {
    font-size: 14px;
    margin-bottom: 20px;
  }

  .signup {
    flex-direction: column;
  }

  input[type="email"],
  button {
    width: 100%;
    padding: 14px;
  }

}