/* =============================================
   Trial Registration Site - Main Stylesheet
   ============================================= */

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

body {
  font-family: 'Segoe UI', Arial, sans-serif;
  background: #f0f4f8;
  color: #333;
  min-height: 100vh;
}

/* ---------- HEADER ---------- */
header {
  background: linear-gradient(135deg, #1a73e8 0%, #0d47a1 100%);
  color: #fff;
  padding: 28px 20px 24px;
  text-align: center;
}
header h1 { font-size: 2rem; letter-spacing: 0.5px; }
header p  { margin-top: 6px; opacity: 0.87; font-size: 1.05rem; }

/* ---------- CONTAINER ---------- */
.container {
  max-width: 760px;
  margin: 40px auto;
  padding: 0 16px 60px;
}

/* ---------- CARD ---------- */
.card {
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 4px 18px rgba(0,0,0,.10);
  padding: 36px 40px;
}

/* ---------- FORM ---------- */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px 28px;
}
.form-grid .full { grid-column: 1 / -1; }

.form-group { display: flex; flex-direction: column; }
.form-group label {
  font-size: .85rem;
  font-weight: 600;
  color: #555;
  margin-bottom: 5px;
  text-transform: uppercase;
  letter-spacing: .4px;
}
.form-group label span.req { color: #e53935; margin-left: 2px; }

.form-group input,
.form-group select,
.form-group textarea {
  border: 1.5px solid #cfd8dc;
  border-radius: 6px;
  padding: 10px 12px;
  font-size: 0.97rem;
  transition: border-color .2s, box-shadow .2s;
  background: #fafafa;
  width: 100%;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: #1a73e8;
  box-shadow: 0 0 0 3px rgba(26,115,232,.15);
  background: #fff;
}
.form-group textarea { resize: vertical; min-height: 90px; }

/* checkbox row */
.checkbox-row {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: .9rem;
  line-height: 1.5;
}
.checkbox-row input[type="checkbox"] {
  width: 18px; height: 18px;
  margin-top: 2px;
  accent-color: #1a73e8;
  flex-shrink: 0;
}
.checkbox-row a { color: #1a73e8; text-decoration: underline; }

/* errors */
.error-msg {
  color: #e53935;
  font-size: .82rem;
  margin-top: 4px;
}

/* ---------- BUTTON ---------- */
.btn-submit {
  margin-top: 28px;
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, #1a73e8 0%, #0d47a1 100%);
  color: #fff;
  font-size: 1.05rem;
  font-weight: 700;
  border: none;
  border-radius: 7px;
  cursor: pointer;
  letter-spacing: .5px;
  transition: opacity .2s, transform .15s;
}
.btn-submit:hover { opacity: .92; transform: translateY(-1px); }
.btn-submit:active { transform: translateY(0); }

/* ---------- ALERTS ---------- */
.alert {
  border-radius: 7px;
  padding: 14px 18px;
  margin-bottom: 22px;
  font-size: .94rem;
}
.alert-danger  { background: #fdecea; border-left: 4px solid #e53935; color: #b71c1c; }
.alert-success { background: #e8f5e9; border-left: 4px solid #43a047; color: #1b5e20; }

/* ---------- SUCCESS PAGE ---------- */
.success-box {
  text-align: center;
  padding: 50px 30px;
}
.success-box .icon { font-size: 4rem; }
.success-box h2 { margin: 18px 0 10px; font-size: 1.7rem; color: #1a73e8; }
.success-box p  { color: #555; line-height: 1.7; }
.success-box .btn-back {
  display: inline-block;
  margin-top: 26px;
  padding: 11px 30px;
  background: #1a73e8;
  color: #fff;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
}

/* ---------- ADMIN TABLE ---------- */
.admin-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 22px;
}
.admin-header h2 { font-size: 1.3rem; color: #1a73e8; }
.count-badge {
  background: #1a73e8;
  color: #fff;
  border-radius: 20px;
  padding: 3px 14px;
  font-size: .85rem;
  font-weight: 700;
}

.table-wrap { overflow-x: auto; }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: .88rem;
}
thead tr { background: #1a73e8; color: #fff; }
thead th { padding: 10px 12px; text-align: left; white-space: nowrap; }
tbody tr:nth-child(even) { background: #f5f8ff; }
tbody tr:hover { background: #e3eeff; }
tbody td { padding: 9px 12px; border-bottom: 1px solid #e0e7ef; vertical-align: top; }

.btn-logout {
  display: inline-block;
  padding: 8px 20px;
  background: #e53935;
  color: #fff;
  border-radius: 6px;
  text-decoration: none;
  font-size: .88rem;
  font-weight: 600;
}

/* ---------- LOGIN FORM ---------- */
.login-box {
  max-width: 380px;
  margin: 80px auto 0;
}
.login-box h2 { text-align: center; margin-bottom: 22px; color: #1a73e8; }

/* ---------- RESPONSIVE ---------- */
@media (max-width: 580px) {
  .form-grid { grid-template-columns: 1fr; }
  .card { padding: 24px 18px; }
  header h1 { font-size: 1.4rem; }
}