.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 38px;
  padding: 0 16px;
  border-radius: var(--radius-full);
  font-family: var(--font);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1;
  cursor: pointer;
  border: 1px solid transparent;
  text-decoration: none;
  white-space: nowrap;
  transition:
    background var(--transition),
    border-color var(--transition),
    color var(--transition),
    box-shadow var(--transition),
    transform var(--transition);
}

.btn:hover {
  text-decoration: none;
}

.btn:active {
  transform: scale(0.97);
}

.btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px #000, 0 0 0 4px var(--accent);
}

.btn-primary {
  background: linear-gradient(180deg, #6ba0ff 0%, var(--accent) 100%);
  color: #fff;
  border-color: transparent;
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.18) inset,
    0 8px 24px rgba(79, 140, 255, 0.28);
}

.btn-primary:hover {
  background: linear-gradient(180deg, #7aabff 0%, var(--accent-hover) 100%);
  color: #fff;
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.22) inset,
    0 10px 28px rgba(79, 140, 255, 0.38);
}

.btn-outline {
  background: rgba(255, 255, 255, 0.02);
  color: var(--text);
  border-color: var(--border-strong);
  backdrop-filter: blur(8px);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.22);
  color: var(--text);
}

.btn-ghost {
  background: transparent;
  color: var(--text-soft);
  border-color: transparent;
}

.btn-ghost:hover {
  color: var(--text);
  background: var(--bg-hover);
}

.btn-lg {
  height: 48px;
  padding: 0 26px;
  font-size: 14px;
}

.btn-block {
  width: 100%;
  height: 44px;
  padding: 0 16px;
}

.nav-logout-form {
  margin: 0;
}