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

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  background: linear-gradient(135deg, #0f172a, #020617);
  color: #0f172a;
  min-height: 100vh;
}

/* -------- Layout -------- */
.page {
  max-width: 820px;
  margin: 60px auto;
  padding: 20px;
}

.card {
  background: #ffffff;
  border-radius: 16px;
  padding: 28px;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.25);
}

/* -------- Header -------- */
.header {
  text-align: center;
  margin-bottom: 24px;
}

.header h1 {
  margin: 0;
  font-size: 2.2rem;
  font-weight: 700;
  color: #0f172a;
}

.header p {
  margin-top: 8px;
  color: #475569;
}

/* -------- Form -------- */
form {
  display: grid;
  gap: 16px;
}

label {
  font-weight: 600;
  color: #0f172a;
}

input,
textarea,
select {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid #cbd5f5;
  font-size: 15px;
  background: #f8fafc;
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: #2563eb;
  background: #ffffff;
}

/* -------- Two-column layout -------- */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

/* -------- Button -------- */
button {
  margin-top: 8px;
  padding: 14px;
  border: none;
  border-radius: 12px;
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: #ffffff;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

button:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 25px rgba(37, 99, 235, 0.4);
}

button:active {
  transform: translateY(0);
}

/* -------- Status Messages -------- */
.info {
  margin-top: 16px;
  text-align: center;
  font-weight: 600;
}

.ok {
  color: #16a34a;
}

.err {
  color: #dc2626;
}

/* -------- Footer -------- */
.footer {
  margin-top: 20px;
  text-align: center;
  font-size: 13px;
  color: #64748b;
}

/* -------- Mobile -------- */
@media (max-width: 640px) {
  .grid-2 {
    grid-template-columns: 1fr;
  }

  .page {
    margin: 20px auto;
  }
}