:root {
  --auth-brand: #235cff;
  --auth-border: #dbe3f2;
  --auth-surface: #ffffff;
  --auth-surface-soft: #f6f8fc;
  --auth-text: #162033;
  --auth-muted: #667085;
  --auth-shadow: 0 28px 80px rgba(15, 23, 42, 0.18);
}

.nav-auth-btn {
  border: 1px solid #cdd7ea;
  background: #fff;
  color: var(--auth-text);
  border-radius: 999px;
  padding: 10px 16px;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
}

.nav-auth-btn-compact {
  background: rgba(255, 255, 255, 0.9);
}

.nav-profile-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--auth-text);
  font-weight: 700;
}

.nav-profile-link-compact {
  background: rgba(255, 255, 255, 0.9);
  padding: 6px 10px 6px 6px;
}

.nav-profile-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  object-fit: cover;
  background: linear-gradient(135deg, #235cff, #23c0ff);
}

.auth-overlay {
  position: fixed;
  inset: 0;
  z-index: 1200;
  display: grid;
  place-items: center;
}

.auth-overlay[hidden],
.growth-prompt[hidden] {
  display: none !important;
}

body.auth-modal-open {
  overflow: hidden;
}

.auth-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(8, 15, 31, 0.56);
  backdrop-filter: blur(10px);
}

.auth-modal {
  position: relative;
  z-index: 1;
  width: min(520px, calc(100vw - 24px));
  background: var(--auth-surface);
  border-radius: 28px;
  padding: 28px;
  box-shadow: var(--auth-shadow);
  border: 1px solid var(--auth-border);
}

.auth-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 40px;
  height: 40px;
  border: none;
  background: #eef3ff;
  color: #334155;
  border-radius: 50%;
  display: grid;
  place-items: center;
  cursor: pointer;
}

.auth-panel {
  display: none;
}

.auth-panel-active {
  display: block;
}

.auth-intro {
  margin-bottom: 22px;
}

.auth-kicker {
  display: inline-block;
  color: var(--auth-brand);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 10px;
}

.auth-intro h2 {
  margin: 0 0 10px;
  font-size: 2rem;
  line-height: 1.05;
  letter-spacing: -0.04em;
  color: var(--auth-text);
}

.auth-intro p {
  margin: 0;
  color: var(--auth-muted);
  line-height: 1.7;
}

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

.auth-form label {
  display: grid;
  gap: 8px;
}

.auth-form span {
  color: #334155;
  font-size: 13px;
  font-weight: 700;
}

.auth-form input,
.auth-form textarea {
  width: 100%;
  border: 1px solid var(--auth-border);
  border-radius: 16px;
  background: var(--auth-surface-soft);
  padding: 14px 16px;
  font: inherit;
  color: var(--auth-text);
  outline: none;
}

.auth-form input:focus,
.auth-form textarea:focus {
  border-color: #b9cbff;
  background: #fff;
}

.auth-submit,
.growth-primary,
.profile-save {
  border: none;
  background: linear-gradient(135deg, #235cff, #1f9cff);
  color: #fff;
  border-radius: 16px;
  padding: 14px 18px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
}

.auth-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.auth-links button,
.growth-secondary,
.profile-ghost,
.profile-logout {
  border: 1px solid var(--auth-border);
  background: #fff;
  color: #334155;
  border-radius: 999px;
  padding: 10px 14px;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
}

.auth-feedback,
.profile-feedback {
  margin-top: 18px;
  padding: 12px 14px;
  border-radius: 14px;
  background: #eef7ff;
  color: #1740d1;
  font-size: 13px;
  line-height: 1.6;
}

.auth-feedback.is-error,
.profile-feedback.is-error {
  background: #fff1f2;
  color: #be123c;
}

.growth-prompt {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 1100;
  width: min(420px, calc(100vw - 24px));
}

.growth-card {
  position: relative;
  background: linear-gradient(180deg, #14284b 0%, #0d1730 100%);
  color: #f8fbff;
  border-radius: 28px;
  padding: 24px;
  box-shadow: var(--auth-shadow);
}

.growth-card h3 {
  margin: 10px 0;
  font-size: 1.8rem;
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.growth-card p {
  margin: 0;
  color: #d4dff7;
  line-height: 1.7;
}

.growth-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.growth-secondary {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.16);
  color: #fff;
}

.growth-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: none;
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  display: grid;
  place-items: center;
  cursor: pointer;
}

@media (max-width: 768px) {
  .auth-modal {
    padding: 22px 18px;
    border-radius: 22px;
  }

  .auth-intro h2,
  .growth-card h3 {
    font-size: 1.55rem;
  }

  .growth-prompt {
    left: 12px;
    right: 12px;
    bottom: 12px;
    width: auto;
  }
}