/* === Base Button === */
.btn {
  padding: 7px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 13px;
  line-height: 1.2;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, transform 0.05s ease;
  background: var(--color-surface);
  color: var(--color-text);
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

/* === Hover === */
.btn:hover {
  background: var(--color-surface-alt);
  border-color: rgba(15, 23, 42, 0.2);
}

/* === Sizes === */
.btn.small {
  font-size: 13px;
  padding: 5px 10px;
  height: 30px;
  line-height: 1.2;
}

.btn.primary,
.btn.btn-primary,
.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), #1b4fd1);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 8px 18px -12px rgba(37, 99, 235, 0.8);
}
.btn.primary:hover,
.btn.btn-primary:hover,
.btn-primary:hover {
  filter: brightness(0.98);
}

.btn.secondary,
.btn.btn-secondary,
.btn-secondary {
  background: rgba(15, 23, 42, 0.06);
  border-color: rgba(15, 23, 42, 0.14);
  color: var(--color-text);
}
.btn.secondary:hover,
.btn.btn-secondary:hover,
.btn-secondary:hover {
  background: rgba(15, 23, 42, 0.1);
}

.btn.danger,
.btn.btn-danger,
.btn-danger {
  background: linear-gradient(135deg, var(--color-danger), #b91c1c);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 8px 18px -12px rgba(220, 38, 38, 0.7);
}
.btn.danger:hover,
.btn.btn-danger:hover,
.btn-danger:hover {
  filter: brightness(0.98);
}

/* === Disabled === */
.btn:disabled,
.btn.disabled {
  opacity: 0.5;
  pointer-events: none;
}

/* === Icon button (optional) === */
.btn.icon-only {
  padding: 0;
  width: 30px;
  height: 30px;
  justify-content: center;
}

.btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

/* === Fix for SVG alignment in calendar buttons === */
.calendar-btn svg {
  display: block;
}