:root {
  --primary: #4dddd8;
  --gold: #f7cd62;
  --bg: #ffffff;
  --text: #111827;
  --muted: #6b7280;
}

/* ======================
   RESET
====================== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background: linear-gradient(180deg, #ffffff 0%, #f9ffff 100%);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--text);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ======================
   CENTER CARD WRAPPER
====================== */
.card {
  width: 100%;
  max-width: 420px;
  margin: auto;
  margin-top: 8vh;
  background: white;
  padding: 2.5rem 2rem;
  border-radius: 20px;
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.06);
  text-align: center;
}

/* ======================
   HEADER
====================== */
.header h1 {
  color: var(--primary);
  font-size: 1.9rem;
  margin-bottom: 0.3rem;
}

.header h2 {
  font-size: 0.95rem;
  font-weight: 500;
  color: #f7cd62;
  margin-bottom: 2rem;
}

/* ======================
   SECTION TITLE
====================== */
.card > h2 {
  font-size: 1.2rem;
  margin-bottom: 1.5rem;
}

/* ======================
   INPUTS
====================== */
input {
  width: 100%;
  padding: 0.9rem 1rem;
  margin-bottom: 1rem;
  border-radius: 12px;
  border: 1px solid #e5e7eb;
  font-size: 0.95rem;
  transition: all 0.2s ease;
}

input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(77,221,216,0.15);
}

/* ======================
   BUTTON
====================== */
button {
  width: 100%;
  padding: 0.9rem;
  margin-top: 0.5rem;
  border-radius: 999px;
  border: none;
  background: var(--primary);
  color: white;
  font-weight: 500;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 10px 25px rgba(77,221,216,0.3);
}

button:hover {
  transform: translateY(-2px);
  box-shadow: 0 15px 35px rgba(77,221,216,0.4);
}

/* ======================
   LINKS
====================== */
a {
  color: var(--primary);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
}

a:hover {
  text-decoration: underline;
}

.card p {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 1rem;
}

#error {
  color: #ef4444;
  font-size: 0.85rem;
  margin-top: 0.75rem;
}

/* ======================
   FOOTER
====================== */
footer {
  text-align: center;
  padding: 2rem 1rem;
  font-size: 0.75rem;
  color: var(--muted);
  margin-top: auto;
}

/* ======================
   TABLET+
====================== */
@media (min-width: 768px) {

  .card {
    padding: 3rem 2.5rem;
  }

  .header h1 {
    font-size: 2.2rem;
  }

  .card > h2 {
    font-size: 1.3rem;
  }
}