:root {
  --slate: #0f172a;
  --gold: #d4af37;
  --white: #ffffff;
}

.stu-auth-page {
  background: #f1f5f9;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header & Footer */
.mini-header {
  padding: 20px 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.back-link {
  text-decoration: none;
  color: var(--slate);
  font-weight: 700;
  font-size: 0.9rem;
}
.brand-text {
  font-family: "Playfair Display", serif;
  font-weight: 900;
  color: var(--slate);
}

.mini-footer {
  padding: 30px;
  text-align: center;
  color: #64748b;
  font-size: 0.8rem;
  margin-top: auto;
}

/* Login Card */
.auth-container {
  flex-grow: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.login-card {
  background: var(--white);
  width: 100%;
  max-width: 420px;
  padding: 40px;
  border-radius: 4px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
}

.card-header {
  text-align: center;
  margin-bottom: 30px;
}
.login-logo {
  width: 80px;
  margin-bottom: 15px;
}
.sub-tag {
  display: block;
  color: var(--gold);
  font-weight: 800;
  text-transform: uppercase;
  font-size: 0.7rem;
  letter-spacing: 2px;
}
.gold {
  color: var(--gold);
  font-style: italic;
}

.form-group {
  margin-bottom: 20px;
}
.form-group label {
  display: block;
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--slate);
  margin-bottom: 8px;
  text-transform: uppercase;
}

.input-field {
  display: flex;
  align-items: center;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  padding: 0 15px;
  transition: 0.3s;
}
.input-field i {
  color: #94a3b8;
}
.input-field input {
  width: 100%;
  border: none;
  outline: none;
  padding: 14px;
  background: transparent;
  font-family: inherit;
}
.input-field:focus-within {
  border-color: var(--gold);
  background: #fff;
}

.btn-primary-stu {
  width: 100%;
  background: var(--slate);
  color: var(--white);
  padding: 16px;
  border: none;
  font-weight: 700;
  cursor: pointer;
  text-transform: uppercase;
  display: flex;
  justify-content: center;
  align-items: center;
  transition: 0.3s;
}
.btn-primary-stu:hover {
  background: var(--gold);
}

.error-msg {
  color: #ef4444;
  font-size: 0.8rem;
  font-weight: 700;
  text-align: center;
  margin-top: 15px;
}

.spinner-small {
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@media (max-width: 480px) {
  .login-card {
    padding: 30px 20px;
  }
  .mini-header {
    padding: 15px 20px;
  }
}