html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background:
    radial-gradient(circle at top, rgba(80, 103, 214, 0.18) 0%, rgba(9, 12, 28, 0) 32%),
    linear-gradient(180deg, #0a0d1b 0%, #050711 100%);
  color: #eef2ff;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

a {
  color: #b8c9ff;
  text-decoration: none;
  transition: color 140ms ease;
}

a:hover {
  color: #e1e9ff;
}

.register-shell {
  min-height: 100vh;
  padding: 28px 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.register-card {
  width: 100%;
  max-width: 760px;
  padding: 24px;
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(17, 21, 44, 0.96) 0%, rgba(8, 10, 22, 0.98) 100%);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow:
    0 20px 60px rgba(0, 0, 0, 0.5),
    inset 0 1px 0 rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(16px);
}

.register-head {
  margin-bottom: 20px;
}

.eyebrow {
  margin: 0 0 8px;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #aebeff;
  opacity: 0.9;
}

.register-head h1 {
  margin: 0;
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.subtext {
  margin: 10px 0 0;
  color: rgba(234, 240, 255, 0.72);
  line-height: 1.6;
  font-size: 0.98rem;
}

.register-form {
  display: grid;
  gap: 16px;
}

.form-section {
  border-radius: 18px;
  padding: 16px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.section-title {
  margin: 0 0 14px;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #aebeff;
}

.collapsible {
  padding: 0;
  overflow: hidden;
}

.collapsible summary {
  list-style: none;
  cursor: pointer;
  padding: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.96rem;
  font-weight: 600;
  color: #eef2ff;
}

.collapsible summary::-webkit-details-marker {
  display: none;
}

.collapsible summary::after {
  content: "+";
  margin-left: auto;
  font-size: 1.2rem;
  line-height: 1;
  color: #aebeff;
}

.collapsible[open] summary::after {
  content: "–";
}

.summary-note {
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(174, 190, 255, 0.8);
}

.section-body {
  padding: 0 16px 16px;
  display: grid;
  gap: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.form-grid {
  display: grid;
  gap: 14px;
}

.two-col {
  grid-template-columns: 1fr;
}

@media (min-width: 700px) {
  .two-col {
    grid-template-columns: 1fr 1fr;
  }
}

label {
  display: block;
  margin-bottom: 7px;
  font-size: 0.86rem;
  color: rgba(237, 242, 255, 0.88);
}

input,
select {
  width: 100%;
  min-height: 48px;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(5, 8, 20, 0.86);
  color: #f4f7ff;
  outline: none;
  font-size: 0.96rem;
  transition:
    border-color 140ms ease,
    box-shadow 140ms ease,
    background 140ms ease;
}

input::placeholder {
  color: rgba(206, 216, 255, 0.42);
}

input:focus,
select:focus {
  border-color: rgba(130, 163, 255, 0.95);
  box-shadow: 0 0 0 4px rgba(86, 126, 255, 0.14);
  background: rgba(8, 12, 28, 0.96);
}

input[type="date"],
input[type="time"] {
  color-scheme: dark;
}

input[type="date"]::-webkit-calendar-picker-indicator,
input[type="time"]::-webkit-calendar-picker-indicator {
  filter: invert(1) brightness(1.4);
  opacity: 0.95;
  cursor: pointer;
}

input[type="date"]::-webkit-datetime-edit,
input[type="time"]::-webkit-datetime-edit {
  color: #f4f7ff;
}

input[type="date"]::-webkit-datetime-edit-fields-wrapper,
input[type="time"]::-webkit-datetime-edit-fields-wrapper {
  color: #f4f7ff;
}

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  padding: 2px 2px 0;
}

.checkbox-row input {
  width: auto;
  min-height: auto;
  margin: 0;
}

.checkbox-row span {
  color: rgba(236, 241, 255, 0.9);
}

.btn-main {
  border: none;
  cursor: pointer;
  border-radius: 999px;
  min-height: 50px;
  padding: 12px 20px;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #08101f;
  background: linear-gradient(180deg, #c3d3ff 0%, #7ea1ff 100%);
  box-shadow:
    0 12px 28px rgba(0, 0, 0, 0.35),
    inset 0 1px 0 rgba(255, 255, 255, 0.5);
  transition:
    transform 120ms ease,
    box-shadow 140ms ease,
    filter 140ms ease;
}

.btn-main:hover {
  transform: translateY(-1px);
  filter: brightness(1.03);
}

.btn-main:active {
  transform: translateY(0);
}

.msg {
  margin-bottom: 4px;
  padding: 13px 14px;
  border-radius: 14px;
  font-size: 0.94rem;
  line-height: 1.5;
}

.msg.success {
  background: rgba(41, 182, 117, 0.14);
  border: 1px solid rgba(76, 210, 150, 0.24);
  color: #d8ffea;
}

.msg.error {
  background: rgba(255, 74, 110, 0.12);
  border: 1px solid rgba(255, 104, 136, 0.24);
  color: #ffdce5;
}

.links-row {
  display: flex;
  justify-content: center;
  text-align: center;
  padding-top: 4px;
}

@media (max-width: 699px) {
  .register-shell {
    padding: 16px;
  }

  .register-card {
    padding: 18px;
    border-radius: 18px;
  }

  .form-section {
    padding: 14px;
    border-radius: 16px;
  }

  .collapsible {
    padding: 0;
  }

  .collapsible summary {
    padding: 14px;
  }

  .section-body {
    padding: 0 14px 14px;
  }
}