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

:root {
  --bg-from: #0d1b2a;
  --bg-to:   #1a2e4a;
  --gold:     #f0c040;
  --gold-dim: #c49a20;
  --white:    #ffffff;
  --card-bg:  #ffffff;
  --text:     #1e2d3d;
  --text-sub: #5a6a7a;
  --border:   #dce4ec;
  --input-bg: #f7f9fb;
  --error:    #d93025;
  --success:  #1e8c45;
  --radius:   14px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: linear-gradient(145deg, var(--bg-from) 0%, var(--bg-to) 100%);
  min-height: 100vh;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 32px 16px 48px;
}

.page {
  width: 100%;
}

.container {
  max-width: 520px;
  margin: 0 auto;
}

/* ---- Header ---- */
.header {
  text-align: center;
  color: var(--white);
  margin-bottom: 28px;
}

.header-icon {
  font-size: 52px;
  line-height: 1;
  margin-bottom: 14px;
}

.header h1 {
  font-size: 30px;
  font-weight: 800;
  color: var(--gold);
  margin-bottom: 10px;
  letter-spacing: -0.5px;
}

.header p {
  font-size: 15px;
  color: rgba(255,255,255,0.72);
  line-height: 1.55;
}

/* ---- Card ---- */
.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 36px 32px;
  box-shadow: 0 24px 64px rgba(0,0,0,0.38), 0 4px 16px rgba(0,0,0,0.22);
}

/* ---- Form fields ---- */
.field {
  margin-bottom: 20px;
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 20px;
}

label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 7px;
  letter-spacing: 0.2px;
}

.req {
  color: var(--error);
}

input {
  width: 100%;
  padding: 13px 15px;
  border: 2px solid var(--border);
  border-radius: 10px;
  font-size: 15px;
  color: var(--text);
  background: var(--input-bg);
  transition: border-color 0.18s, background 0.18s;
  outline: none;
  -webkit-appearance: none;
}

input::placeholder {
  color: #b0bcc8;
}

input:focus {
  border-color: var(--gold-dim);
  background: var(--white);
}

input.is-error {
  border-color: var(--error);
}

.field-hint {
  display: block;
  font-size: 12px;
  color: var(--text-sub);
  margin-top: 5px;
}

.field-error {
  display: block;
  font-size: 12px;
  color: var(--error);
  margin-top: 5px;
  min-height: 16px;
}

/* ---- Alert ---- */
.form-alert {
  display: none;
  background: #fff0f0;
  border: 1.5px solid #f5b8b5;
  border-radius: 9px;
  color: var(--error);
  font-size: 14px;
  line-height: 1.5;
  padding: 12px 15px;
  margin-bottom: 20px;
}

/* ---- Submit button ---- */
.btn-primary {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 15px;
  background: linear-gradient(135deg, var(--gold-dim) 0%, var(--gold) 100%);
  color: #1a2000;
  border: none;
  border-radius: 10px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.3px;
  cursor: pointer;
  transition: opacity 0.18s, transform 0.12s;
  box-shadow: 0 4px 14px rgba(192,150,0,0.35);
}

.btn-primary:hover:not(:disabled) {
  opacity: 0.92;
  transform: translateY(-1px);
}

.btn-primary:active:not(:disabled) {
  transform: translateY(0);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-spin {
  display: none;
  width: 18px;
  height: 18px;
  border: 2.5px solid rgba(0,0,0,0.2);
  border-top-color: #1a2000;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  margin-left: 10px;
}

.btn-primary.loading .btn-spin {
  display: block;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.form-note {
  text-align: center;
  font-size: 12px;
  color: var(--text-sub);
  margin-top: 14px;
}

/* ---- Success card ---- */
.success-card {
  text-align: center;
}

.success-icon {
  width: 70px;
  height: 70px;
  background: linear-gradient(135deg, #1e8c45, #28b85a);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 22px;
  font-size: 30px;
  color: white;
  font-weight: 700;
  box-shadow: 0 6px 20px rgba(30,140,69,0.35);
}

.success-card h2 {
  font-size: 24px;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 10px;
}

.success-name {
  font-size: 18px;
  color: var(--text-sub);
  margin-bottom: 24px;
}

.success-code-block {
  background: var(--input-bg);
  border: 2px solid var(--border);
  border-radius: 10px;
  padding: 16px 20px;
  margin-bottom: 20px;
}

.success-code-label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-sub);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
}

.success-code {
  display: block;
  font-size: 26px;
  font-weight: 800;
  letter-spacing: 4px;
  color: var(--text);
}

.info-banner {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  background: #fffbec;
  border: 1.5px solid #f0d060;
  border-radius: 10px;
  padding: 16px;
  text-align: left;
  margin-bottom: 20px;
  font-size: 14px;
  line-height: 1.5;
  color: #5a4a00;
}

.info-icon {
  font-size: 20px;
  flex-shrink: 0;
}

.success-footer {
  font-size: 13px;
  color: var(--text-sub);
}

/* ---- Responsive ---- */
@media (max-width: 480px) {
  .card {
    padding: 24px 20px;
  }

  .field-row {
    grid-template-columns: 1fr;
  }

  .header h1 {
    font-size: 24px;
  }
}