/* ============================================================
   REGISTER USER – CLEAN VERSION
============================================================ */

html, body {
  margin: 0;
  padding: 0;
  width: 100%;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont,
               "Segoe UI", Roboto, sans-serif;
  background: #ffffff;
  color: #111827;
  overflow-x: hidden;
}

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

/* ================= LAYOUT ================= */

main {
  padding: 1rem 0;
}

.container {
  width: 94%;
  max-width: 800px;
  margin: 0 auto;
}

h1 {
  text-align: center;
  font-size: 22px;
  margin: 0.5rem 0;
}

h3 {
  text-align: center;
  font-size: 15px;
  margin: 1rem 0 0.5rem;
}

/* ================= TABLE FORM ================= */

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
}

td {
  padding: 0.5rem;
  vertical-align: middle;
}

td:first-child {
  font-weight: 600;
}

/* ================= INPUTS ================= */

input[type="text"],
input[type="password"] {
  width: 100%;
  padding: 0.55rem;
  font-size: 16px; /* prevents iOS zoom */
  border: 1px solid #d1d5db;
  border-radius: 4px;
}

/* ================= SUBMIT ================= */

input[type="submit"] {
  width: 100%;
  margin-top: 1.2rem;
  padding: 0.75rem;
  font-size: 1.1rem;
  font-weight: 600;
  background: #2563eb;
  color: #ffffff;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}

input[type="submit"]:active {
  opacity: 0.9;
}

/* ================= VALIDATION ================= */

.error {
  border-color: red !important;
}

/* ================= MOBILE FLEX LAYOUT ================= */

@media (max-width: 768px) {

  tr {
    display: flex;
    align-items: center;
    margin-bottom: 12px;
  }

  td {
    padding: 0;
  }

  td:first-child {
    flex: 0 0 38%;
    font-size: 14px;
    padding-right: 8px;
    white-space: nowrap;
  }

  td:last-child {
    flex: 1;
  }
}

/* ================= BACK BUTTON ================= */

.back-wrapper {
  padding: 15px 20px 0;
}

.back-btn {
  background: none;
  border: none;
  padding: 0;
  color: #1e3a5f;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
}