/* Форма входа ученика — современный стиль */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@500;600;700&display=swap');

* {
  box-sizing: border-box;
}

.hidden {
  display: none !important;
}

body {
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.55), transparent 28%),
    radial-gradient(circle at bottom right, rgba(59, 130, 246, 0.2), transparent 24%),
    linear-gradient(135deg, #fef3c7 0%, #fed7aa 28%, #fb7185 62%, #7c3aed 100%);
  padding: 24px;
}

.auth-page {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
}

.auth-shell {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(360px, 430px);
  gap: 28px;
  align-items: stretch;
}

.auth-back {
  font-size: 0.9rem;
  font-weight: 700;
  color: #fff7ed;
  text-decoration: none;
  margin-bottom: 18px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(12px);
  transition: transform 0.2s, background 0.2s;
}

.auth-back:hover {
  transform: translateY(-1px);
  background: rgba(15, 23, 42, 0.26);
}

.auth-hero {
  position: relative;
  overflow: hidden;
  padding: 42px 38px;
  border-radius: 30px;
  color: #ffffff;
  background: linear-gradient(160deg, rgba(15, 23, 42, 0.84), rgba(124, 58, 237, 0.74));
  box-shadow: 0 28px 60px rgba(76, 29, 149, 0.28);
}

.auth-hero::before,
.auth-hero::after {
  content: "";
  position: absolute;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
}

.auth-hero::before {
  width: 180px;
  height: 180px;
  top: -50px;
  right: -40px;
}

.auth-hero::after {
  width: 120px;
  height: 120px;
  bottom: -24px;
  left: -24px;
}

.auth-hero-badge {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.18);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.auth-hero h1 {
  font-size: clamp(2rem, 4vw, 3.25rem);
  line-height: 1.05;
  margin: 18px 0 14px;
  max-width: 620px;
}

.auth-hero p {
  max-width: 540px;
  margin: 0;
  font-size: 1.05rem;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.86);
}

.auth-hero-steps {
  margin-top: 28px;
  display: grid;
  gap: 14px;
}

.auth-step {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 14px;
  align-items: center;
  padding: 16px 18px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(10px);
}

.auth-step-number {
  width: 52px;
  height: 52px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 16px;
  background: linear-gradient(135deg, #facc15, #fb7185);
  color: #0f172a;
  font-size: 1.15rem;
  font-weight: 800;
}

.auth-step strong,
.auth-step span {
  display: block;
}

.auth-step strong {
  font-size: 1rem;
  margin-bottom: 4px;
}

.auth-step span {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.95rem;
}

.auth-card {
  background: rgba(255, 255, 255, 0.94);
  padding: 36px 32px;
  border-radius: 28px;
  box-shadow: 0 28px 60px rgba(15, 23, 42, 0.16);
  width: 100%;
  animation: authCardIn 0.5s ease-out;
  backdrop-filter: blur(10px);
}

@keyframes authCardIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.auth-card-header {
  margin-bottom: 28px;
}

.auth-badge {
  display: inline-flex;
  align-items: center;
  padding: 7px 14px;
  font-size: 0.75rem;
  font-weight: 700;
  color: #7c2d12;
  background: linear-gradient(135deg, #fde68a, #fdba74);
  border-radius: 999px;
  margin-bottom: 14px;
}

.auth-card-header h2 {
  font-size: 1.9rem;
  font-weight: 700;
  color: #0f172a;
  margin: 0 0 8px 0;
}

.auth-card-header p {
  font-size: 0.98rem;
  color: #475569;
  margin: 0;
}

.auth-alert {
  padding: 14px 16px;
  border-radius: 12px;
  font-size: 0.9rem;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.auth-alert-error {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #dc2626;
}

.auth-alert-icon {
  font-weight: 700;
}

.auth-form {
  margin-top: 8px;
}

.auth-row {
  display: flex;
  gap: 14px;
  align-items: flex-end;
}

.auth-field-col {
  flex: 1 1 0;
  min-width: 0;
}

@media (max-width: 520px) {
  .auth-row {
    flex-direction: column;
    gap: 0;
  }
}

.auth-field {
  margin-bottom: 20px;
}

.auth-field.hidden,
.auth-submit.hidden {
  display: none !important;
}

.auth-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 700;
  color: #475569;
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.auth-input {
  width: 100%;
  padding: 15px 16px;
  font-size: 1rem;
  font-family: inherit;
  border: 1px solid #dbe4f0;
  border-radius: 16px;
  background: #ffffff;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.auth-input:focus {
  outline: none;
  border-color: #8b5cf6;
  box-shadow: 0 0 0 4px rgba(139, 92, 246, 0.16);
}

.auth-input::placeholder {
  color: #94a3b8;
}

.auth-help {
  margin: 8px 0 0;
  font-size: 0.86rem;
  color: #64748b;
  line-height: 1.5;
}

.auth-submit {
  margin-top: 24px;
}

.auth-btn {
  width: 100%;
  padding: 17px 24px;
  font-size: 1rem;
  font-weight: 700;
  font-family: inherit;
  color: #fff;
  background: linear-gradient(135deg, #8b5cf6 0%, #ec4899 100%);
  border: none;
  border-radius: 16px;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
}

.auth-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 30px rgba(139, 92, 246, 0.32);
}

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

@media (max-width: 920px) {
  .auth-shell {
    grid-template-columns: 1fr;
  }

  .auth-hero {
    padding: 32px 26px;
  }
}

@media (max-width: 520px) {
  body {
    padding: 16px;
  }

  .auth-card,
  .auth-hero {
    padding: 24px 20px;
    border-radius: 24px;
  }

  .auth-row {
    flex-direction: column;
    gap: 0;
  }

  .auth-card-header h2 {
    font-size: 1.6rem;
  }

  .auth-hero h1 {
    font-size: 1.85rem;
  }
}